/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/loop-acceleration/array_2-1-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:41:20,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:41:20,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:41:20,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:41:20,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:41:20,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:41:20,169 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:41:20,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:41:20,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:41:20,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:41:20,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:41:20,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:41:20,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:41:20,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:41:20,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:41:20,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:41:20,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:41:20,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:41:20,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:41:20,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:41:20,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:41:20,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:41:20,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:41:20,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:41:20,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:41:20,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:41:20,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:41:20,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:41:20,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:41:20,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:41:20,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:41:20,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:41:20,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:41:20,312 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:41:20,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:41:20,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:41:20,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:41:20,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:41:20,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:41:20,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:41:20,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:41:20,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:41:20,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:41:20,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:41:20,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:41:20,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:41:20,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:20,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:41:20,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:41:20,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:41:20,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:41:20,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:41:20,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:41:20,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:41:20,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:41:20,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:41:20,839 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:41:20,844 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:41:20,846 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:41:20,847 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:41:20,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2021-01-06 16:41:20,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06421c6fa/6f3390d7daaf40398b119ce3e2cf9644/FLAG0d2c8a4a6 [2021-01-06 16:41:21,866 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:41:21,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_2-1-simple.i [2021-01-06 16:41:21,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06421c6fa/6f3390d7daaf40398b119ce3e2cf9644/FLAG0d2c8a4a6 [2021-01-06 16:41:22,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/06421c6fa/6f3390d7daaf40398b119ce3e2cf9644 [2021-01-06 16:41:22,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:41:22,174 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:41:22,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:22,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:41:22,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:41:22,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ebe62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22, skipping insertion in model container [2021-01-06 16:41:22,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:41:22,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:41:22,424 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/loop-acceleration/array_2-1-simple.i[809,822] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~B~0,],[IdentifierExpression[~i~0,]]] [2021-01-06 16:41:22,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:22,475 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:41:22,495 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/loop-acceleration/array_2-1-simple.i[809,822] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#B~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#B~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] [2021-01-06 16:41:22,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:41:22,532 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:41:22,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22 WrapperNode [2021-01-06 16:41:22,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:41:22,535 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:22,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:41:22,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:41:22,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:41:22,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:41:22,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:41:22,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:41:22,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... [2021-01-06 16:41:22,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:41:22,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:41:22,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:41:22,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:41:22,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:41:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:41:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-01-06 16:41:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:41:22,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:41:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:41:22,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:41:22,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:41:22,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:41:23,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:41:23,167 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:41:23,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:23 BoogieIcfgContainer [2021-01-06 16:41:23,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:41:23,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:41:23,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:41:23,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:41:23,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:41:22" (1/3) ... [2021-01-06 16:41:23,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4994c52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:23, skipping insertion in model container [2021-01-06 16:41:23,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:41:22" (2/3) ... [2021-01-06 16:41:23,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4994c52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:41:23, skipping insertion in model container [2021-01-06 16:41:23,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:41:23" (3/3) ... [2021-01-06 16:41:23,232 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2021-01-06 16:41:23,241 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:41:23,248 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:41:23,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:41:23,331 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:41:23,332 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:41:23,332 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:41:23,332 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:41:23,332 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:41:23,333 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:41:23,333 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:41:23,333 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:41:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:41:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:41:23,359 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:23,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:41:23,361 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:23,370 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-01-06 16:41:23,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:23,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728565634] [2021-01-06 16:41:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728565634] [2021-01-06 16:41:23,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:41:23,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:41:23,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530012119] [2021-01-06 16:41:23,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:41:23,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:23,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:41:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:41:23,666 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2021-01-06 16:41:23,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:23,712 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-01-06 16:41:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:41:23,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:41:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:23,726 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:41:23,727 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:41:23,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:41:23,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:41:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-01-06 16:41:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:41:23,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-01-06 16:41:23,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-01-06 16:41:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:23,783 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-01-06 16:41:23,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:41:23,784 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-01-06 16:41:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 16:41:23,784 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:23,785 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:23,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:41:23,785 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:23,787 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2021-01-06 16:41:23,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:23,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504817871] [2021-01-06 16:41:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:23,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504817871] [2021-01-06 16:41:23,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143569145] [2021-01-06 16:41:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:24,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:41:24,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:24,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:24,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:41:24,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380583561] [2021-01-06 16:41:24,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:41:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:24,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:41:24,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:24,108 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2021-01-06 16:41:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:24,150 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-01-06 16:41:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:41:24,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 16:41:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:24,153 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:41:24,153 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:41:24,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:41:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:41:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-01-06 16:41:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:41:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-01-06 16:41:24,161 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-01-06 16:41:24,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:24,162 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-01-06 16:41:24,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:41:24,163 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-01-06 16:41:24,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:41:24,164 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:24,164 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:24,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:41:24,379 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:24,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2021-01-06 16:41:24,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:24,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185407699] [2021-01-06 16:41:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:24,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185407699] [2021-01-06 16:41:24,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680031030] [2021-01-06 16:41:24,539 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:24,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:24,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:24,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:41:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:24,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:24,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:41:24,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620693815] [2021-01-06 16:41:24,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:41:24,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:24,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:41:24,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:41:24,631 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2021-01-06 16:41:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:24,661 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-01-06 16:41:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:41:24,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 16:41:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:24,663 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:41:24,663 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:41:24,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:41:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:41:24,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-01-06 16:41:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 16:41:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-01-06 16:41:24,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-01-06 16:41:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:24,668 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-01-06 16:41:24,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:41:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-01-06 16:41:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:41:24,669 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:24,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:24,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:24,883 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2021-01-06 16:41:24,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:24,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963177413] [2021-01-06 16:41:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:24,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963177413] [2021-01-06 16:41:24,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441490727] [2021-01-06 16:41:24,992 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:25,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:41:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:25,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:41:25,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:25,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:25,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:41:25,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828725197] [2021-01-06 16:41:25,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:41:25,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:41:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:25,109 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2021-01-06 16:41:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:25,145 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-01-06 16:41:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:41:25,146 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-01-06 16:41:25,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:25,147 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:41:25,147 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:41:25,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:41:25,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:41:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 16:41:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 16:41:25,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-01-06 16:41:25,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-01-06 16:41:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:25,154 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-01-06 16:41:25,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:41:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-01-06 16:41:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:41:25,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:25,155 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:25,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:25,370 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:25,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2021-01-06 16:41:25,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:25,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376757519] [2021-01-06 16:41:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:25,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376757519] [2021-01-06 16:41:25,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030390388] [2021-01-06 16:41:25,455 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:25,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:25,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:25,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:41:25,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:25,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:25,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:41:25,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416527948] [2021-01-06 16:41:25,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:41:25,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:25,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:41:25,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:41:25,623 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2021-01-06 16:41:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:25,696 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-01-06 16:41:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:41:25,697 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 16:41:25,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:25,698 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:41:25,698 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:41:25,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:41:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:41:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 16:41:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:41:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 16:41:25,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-01-06 16:41:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:25,711 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 16:41:25,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:41:25,711 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 16:41:25,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:41:25,712 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:25,712 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:25,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:25,916 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:25,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2021-01-06 16:41:25,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:25,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614755395] [2021-01-06 16:41:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:26,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614755395] [2021-01-06 16:41:26,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866311700] [2021-01-06 16:41:26,009 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:26,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:41:26,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:41:26,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:26,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:26,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:41:26,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490512257] [2021-01-06 16:41:26,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:41:26,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:41:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:26,136 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2021-01-06 16:41:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:26,176 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-01-06 16:41:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:41:26,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2021-01-06 16:41:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:26,178 INFO L225 Difference]: With dead ends: 24 [2021-01-06 16:41:26,178 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 16:41:26,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:41:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 16:41:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-01-06 16:41:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:41:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 16:41:26,184 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-01-06 16:41:26,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:26,184 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 16:41:26,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:41:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 16:41:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:41:26,185 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:26,185 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:26,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:41:26,399 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2021-01-06 16:41:26,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:26,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186596204] [2021-01-06 16:41:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:26,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186596204] [2021-01-06 16:41:26,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113192450] [2021-01-06 16:41:26,561 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:26,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:41:26,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:26,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:41:26,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:26,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:26,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:26,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:41:26,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212512593] [2021-01-06 16:41:26,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:41:26,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:26,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:41:26,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:26,833 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2021-01-06 16:41:26,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:26,890 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-01-06 16:41:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:41:26,891 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-01-06 16:41:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:26,892 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:41:26,892 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:41:26,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:41:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:41:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 16:41:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:41:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-01-06 16:41:26,910 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-01-06 16:41:26,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:26,910 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-01-06 16:41:26,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:41:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-01-06 16:41:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:41:26,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:26,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:27,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:27,129 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2021-01-06 16:41:27,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:27,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705745168] [2021-01-06 16:41:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:27,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705745168] [2021-01-06 16:41:27,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270714664] [2021-01-06 16:41:27,257 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:27,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:41:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:27,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:27,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:41:27,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824062352] [2021-01-06 16:41:27,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:41:27,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:27,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:41:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:27,391 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2021-01-06 16:41:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:27,462 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-01-06 16:41:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:41:27,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2021-01-06 16:41:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:27,470 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:41:27,470 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:41:27,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:41:27,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:41:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-01-06 16:41:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 16:41:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-01-06 16:41:27,490 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-01-06 16:41:27,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:27,490 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-01-06 16:41:27,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:41:27,491 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-01-06 16:41:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:41:27,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:27,495 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:27,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:27,709 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2021-01-06 16:41:27,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:27,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266436762] [2021-01-06 16:41:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:27,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266436762] [2021-01-06 16:41:27,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012215949] [2021-01-06 16:41:27,887 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:27,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:27,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:41:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:28,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:28,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:41:28,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305611182] [2021-01-06 16:41:28,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:41:28,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:28,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:41:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:41:28,047 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2021-01-06 16:41:28,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:28,118 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-01-06 16:41:28,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:41:28,119 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2021-01-06 16:41:28,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:28,120 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:41:28,120 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:41:28,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:41:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:41:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-01-06 16:41:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:41:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-01-06 16:41:28,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-01-06 16:41:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:28,126 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-01-06 16:41:28,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:41:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-01-06 16:41:28,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:41:28,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:28,127 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:28,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:41:28,343 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2021-01-06 16:41:28,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:28,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560077435] [2021-01-06 16:41:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:28,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560077435] [2021-01-06 16:41:28,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698529388] [2021-01-06 16:41:28,577 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:28,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:41:28,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:28,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:41:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:28,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:28,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:41:28,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839708275] [2021-01-06 16:41:28,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:41:28,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:28,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:41:28,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:28,825 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2021-01-06 16:41:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:28,884 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-01-06 16:41:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:41:28,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 16:41:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:28,885 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:41:28,885 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:41:28,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:41:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:41:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 16:41:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:41:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-01-06 16:41:28,892 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-01-06 16:41:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:28,892 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-01-06 16:41:28,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:41:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-01-06 16:41:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:41:28,893 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:28,893 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:29,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:29,107 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:29,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:29,108 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2021-01-06 16:41:29,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:29,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100030087] [2021-01-06 16:41:29,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:29,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100030087] [2021-01-06 16:41:29,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167578828] [2021-01-06 16:41:29,262 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:29,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:29,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:29,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:41:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:29,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:29,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:41:29,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915783374] [2021-01-06 16:41:29,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:41:29,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:29,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:41:29,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:41:29,417 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2021-01-06 16:41:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:29,493 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 16:41:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:41:29,494 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2021-01-06 16:41:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:29,495 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:41:29,495 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:41:29,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:41:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:41:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-01-06 16:41:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 16:41:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-01-06 16:41:29,501 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-01-06 16:41:29,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:29,502 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-01-06 16:41:29,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:41:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-01-06 16:41:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:41:29,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:29,503 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:29,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:29,718 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2021-01-06 16:41:29,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:29,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922127050] [2021-01-06 16:41:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:29,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922127050] [2021-01-06 16:41:29,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893455531] [2021-01-06 16:41:29,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:30,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:41:30,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:30,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:41:30,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:30,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:30,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:41:30,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042902412] [2021-01-06 16:41:30,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:41:30,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:30,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:41:30,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:41:30,124 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2021-01-06 16:41:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:30,201 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-01-06 16:41:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:41:30,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2021-01-06 16:41:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:30,202 INFO L225 Difference]: With dead ends: 36 [2021-01-06 16:41:30,203 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 16:41:30,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:41:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 16:41:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-01-06 16:41:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:41:30,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-01-06 16:41:30,208 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-01-06 16:41:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:30,209 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-01-06 16:41:30,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:41:30,209 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-01-06 16:41:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:41:30,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:30,210 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:30,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:41:30,424 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:30,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2021-01-06 16:41:30,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:30,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490563885] [2021-01-06 16:41:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:30,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490563885] [2021-01-06 16:41:30,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907106116] [2021-01-06 16:41:30,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:30,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:41:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:41:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:30,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:30,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:41:30,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241419039] [2021-01-06 16:41:30,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:41:30,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:30,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:41:30,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:41:30,928 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2021-01-06 16:41:30,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:30,994 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-01-06 16:41:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:41:30,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2021-01-06 16:41:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:30,996 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:41:30,996 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:41:30,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:41:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:41:31,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 16:41:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:41:31,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-01-06 16:41:31,002 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-01-06 16:41:31,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:31,002 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-01-06 16:41:31,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:41:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-01-06 16:41:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:41:31,003 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:31,003 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:31,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:41:31,219 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2021-01-06 16:41:31,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:31,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458167290] [2021-01-06 16:41:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:31,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458167290] [2021-01-06 16:41:31,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132752442] [2021-01-06 16:41:31,442 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:41:31,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:31,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:31,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:41:31,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422471902] [2021-01-06 16:41:31,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:41:31,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:31,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:41:31,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:41:31,584 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2021-01-06 16:41:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:31,641 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-01-06 16:41:31,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:41:31,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2021-01-06 16:41:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:31,643 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:41:31,643 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:41:31,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:41:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:41:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-01-06 16:41:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:41:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-01-06 16:41:31,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-01-06 16:41:31,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:31,649 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-01-06 16:41:31,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:41:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-01-06 16:41:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:41:31,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:31,650 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:31,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:41:31,864 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2021-01-06 16:41:31,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:31,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865440084] [2021-01-06 16:41:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:32,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865440084] [2021-01-06 16:41:32,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379435016] [2021-01-06 16:41:32,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:32,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:32,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:32,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:41:32,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:32,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:32,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:41:32,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66002] [2021-01-06 16:41:32,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:41:32,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:32,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:41:32,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:41:32,228 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2021-01-06 16:41:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:32,317 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-01-06 16:41:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:41:32,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2021-01-06 16:41:32,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:32,321 INFO L225 Difference]: With dead ends: 42 [2021-01-06 16:41:32,321 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:41:32,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:41:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:41:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-01-06 16:41:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:41:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-01-06 16:41:32,334 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-01-06 16:41:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:32,335 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-01-06 16:41:32,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:41:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-01-06 16:41:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:41:32,335 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:32,337 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:32,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:32,553 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:32,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:32,554 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2021-01-06 16:41:32,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:32,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634463254] [2021-01-06 16:41:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:32,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634463254] [2021-01-06 16:41:32,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397461856] [2021-01-06 16:41:32,790 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:33,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:41:33,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:33,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:41:33,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:33,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:33,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:41:33,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091458666] [2021-01-06 16:41:33,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:41:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:33,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:41:33,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:41:33,159 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2021-01-06 16:41:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:33,240 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-01-06 16:41:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:41:33,240 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2021-01-06 16:41:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:33,241 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:41:33,241 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:41:33,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:41:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:41:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 16:41:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:41:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-01-06 16:41:33,248 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-01-06 16:41:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:33,248 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-01-06 16:41:33,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:41:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-01-06 16:41:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:41:33,249 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:33,249 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:33,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:41:33,464 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2021-01-06 16:41:33,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:33,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543125162] [2021-01-06 16:41:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:33,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543125162] [2021-01-06 16:41:33,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838762410] [2021-01-06 16:41:33,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:33,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:33,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:33,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:41:33,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:33,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:33,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:41:33,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245711600] [2021-01-06 16:41:33,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:41:33,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:33,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:41:33,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:41:33,960 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2021-01-06 16:41:34,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:34,056 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-01-06 16:41:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:41:34,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2021-01-06 16:41:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:34,058 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:41:34,058 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:41:34,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:41:34,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:41:34,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-01-06 16:41:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 16:41:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-01-06 16:41:34,065 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-01-06 16:41:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:34,065 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-01-06 16:41:34,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:41:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-01-06 16:41:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:41:34,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:34,067 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:34,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:41:34,281 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:34,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:34,282 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2021-01-06 16:41:34,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:34,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751077159] [2021-01-06 16:41:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:34,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751077159] [2021-01-06 16:41:34,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635995539] [2021-01-06 16:41:34,564 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:34,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:41:34,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:41:34,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:34,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:34,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:41:34,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102094014] [2021-01-06 16:41:34,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:41:34,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:34,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:41:34,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:41:34,875 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2021-01-06 16:41:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:34,964 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-01-06 16:41:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:41:34,965 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2021-01-06 16:41:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:34,965 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:41:34,965 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 16:41:34,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:41:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 16:41:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-01-06 16:41:34,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:41:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 16:41:34,971 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-01-06 16:41:34,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:34,971 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 16:41:34,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:41:34,971 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 16:41:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:41:34,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:34,972 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:35,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:41:35,173 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:35,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:35,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2021-01-06 16:41:35,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:35,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241614411] [2021-01-06 16:41:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:35,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241614411] [2021-01-06 16:41:35,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371021377] [2021-01-06 16:41:35,471 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:35,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:41:35,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:35,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:41:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:36,053 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:36,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:36,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:41:36,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593446703] [2021-01-06 16:41:36,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:41:36,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:41:36,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:41:36,058 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2021-01-06 16:41:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:36,149 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-01-06 16:41:36,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:41:36,150 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2021-01-06 16:41:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:36,151 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:41:36,151 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:41:36,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:41:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:41:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-01-06 16:41:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:41:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-01-06 16:41:36,157 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-01-06 16:41:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:36,157 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-01-06 16:41:36,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:41:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-01-06 16:41:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:41:36,158 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:36,158 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:36,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:36,365 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:36,366 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2021-01-06 16:41:36,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:36,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900136673] [2021-01-06 16:41:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900136673] [2021-01-06 16:41:36,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140603913] [2021-01-06 16:41:36,755 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:36,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:41:36,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:36,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:36,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:41:36,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612954440] [2021-01-06 16:41:36,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:41:36,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:36,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:41:36,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:41:36,952 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2021-01-06 16:41:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:37,069 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-01-06 16:41:37,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:41:37,070 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2021-01-06 16:41:37,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:37,071 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:41:37,071 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:41:37,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:41:37,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:41:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-01-06 16:41:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:41:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-01-06 16:41:37,077 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-01-06 16:41:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:37,077 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-01-06 16:41:37,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:41:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-01-06 16:41:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:41:37,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:37,078 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:37,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:37,288 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2021-01-06 16:41:37,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:37,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718354552] [2021-01-06 16:41:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:37,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718354552] [2021-01-06 16:41:37,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208350556] [2021-01-06 16:41:37,649 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:37,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:37,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:37,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:41:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:37,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:37,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:41:37,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785296022] [2021-01-06 16:41:37,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:41:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:37,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:41:37,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:41:37,839 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2021-01-06 16:41:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:37,931 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-01-06 16:41:37,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:41:37,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2021-01-06 16:41:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:37,932 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:41:37,932 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:41:37,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:41:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:41:37,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-01-06 16:41:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:41:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-01-06 16:41:37,938 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-01-06 16:41:37,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:37,938 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-01-06 16:41:37,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:41:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-01-06 16:41:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:41:37,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:37,939 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:38,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:41:38,153 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2021-01-06 16:41:38,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:38,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827352302] [2021-01-06 16:41:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:38,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827352302] [2021-01-06 16:41:38,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239866186] [2021-01-06 16:41:38,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:39,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:41:39,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:39,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:41:39,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:39,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:39,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:41:39,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364867066] [2021-01-06 16:41:39,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:41:39,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:39,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:41:39,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:41:39,152 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2021-01-06 16:41:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:39,253 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-01-06 16:41:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:41:39,257 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2021-01-06 16:41:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:39,258 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:41:39,258 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 16:41:39,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:41:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 16:41:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-01-06 16:41:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:41:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-01-06 16:41:39,264 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-01-06 16:41:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:39,265 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-01-06 16:41:39,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:41:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-01-06 16:41:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:41:39,265 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:39,266 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:39,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:41:39,480 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:39,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:39,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2021-01-06 16:41:39,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:39,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81546558] [2021-01-06 16:41:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:39,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81546558] [2021-01-06 16:41:39,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356013292] [2021-01-06 16:41:39,921 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 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 [2021-01-06 16:41:40,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:40,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:40,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:41:40,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:40,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:40,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:41:40,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767063367] [2021-01-06 16:41:40,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:41:40,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:40,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:41:40,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:41:40,125 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2021-01-06 16:41:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:40,231 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-01-06 16:41:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:41:40,232 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2021-01-06 16:41:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:40,232 INFO L225 Difference]: With dead ends: 58 [2021-01-06 16:41:40,232 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 16:41:40,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:41:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 16:41:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-01-06 16:41:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 16:41:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-01-06 16:41:40,237 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-01-06 16:41:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:40,238 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-01-06 16:41:40,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:41:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-01-06 16:41:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:41:40,238 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:40,238 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:40,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:40,453 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:40,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:40,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2021-01-06 16:41:40,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:40,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073985459] [2021-01-06 16:41:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:40,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073985459] [2021-01-06 16:41:40,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996132417] [2021-01-06 16:41:40,922 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 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 [2021-01-06 16:41:41,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 16:41:41,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:41,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:41:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:41,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:41,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:41:41,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314001896] [2021-01-06 16:41:41,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:41:41,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:41,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:41:41,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:41:41,512 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2021-01-06 16:41:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:41,627 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-01-06 16:41:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:41:41,627 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2021-01-06 16:41:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:41,628 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:41:41,628 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:41:41,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:41:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:41:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-01-06 16:41:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:41:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-01-06 16:41:41,633 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-01-06 16:41:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:41,634 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-01-06 16:41:41,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:41:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-01-06 16:41:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:41:41,635 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:41,635 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:41,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:41:41,855 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:41,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2021-01-06 16:41:41,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:41,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914731786] [2021-01-06 16:41:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914731786] [2021-01-06 16:41:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689377082] [2021-01-06 16:41:42,339 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 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 [2021-01-06 16:41:44,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:41:44,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:44,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:41:44,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:44,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:44,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:41:44,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993242865] [2021-01-06 16:41:44,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:41:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:44,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:41:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:41:44,412 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2021-01-06 16:41:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:44,526 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-01-06 16:41:44,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:41:44,527 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2021-01-06 16:41:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:44,528 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:41:44,528 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:41:44,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:41:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:41:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-01-06 16:41:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:41:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-01-06 16:41:44,532 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-01-06 16:41:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:44,532 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-01-06 16:41:44,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:41:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-01-06 16:41:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:41:44,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:44,533 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:44,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:44,748 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:44,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2021-01-06 16:41:44,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:44,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385815668] [2021-01-06 16:41:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:45,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385815668] [2021-01-06 16:41:45,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037365265] [2021-01-06 16:41:45,256 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 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 [2021-01-06 16:41:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:41:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:45,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:45,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:41:45,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077753604] [2021-01-06 16:41:45,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:41:45,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:41:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:41:45,452 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2021-01-06 16:41:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:45,587 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-01-06 16:41:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:41:45,589 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2021-01-06 16:41:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:45,589 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:41:45,589 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:41:45,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:41:45,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:41:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-01-06 16:41:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 16:41:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-01-06 16:41:45,594 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-01-06 16:41:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:45,594 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-01-06 16:41:45,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:41:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-01-06 16:41:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:41:45,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:45,595 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:45,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:41:45,809 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2021-01-06 16:41:45,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:45,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773605774] [2021-01-06 16:41:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773605774] [2021-01-06 16:41:46,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520401099] [2021-01-06 16:41:46,416 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 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 [2021-01-06 16:41:46,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:41:46,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:41:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:46,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:46,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:41:46,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459244303] [2021-01-06 16:41:46,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:41:46,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:41:46,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:41:46,605 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2021-01-06 16:41:46,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:46,721 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-01-06 16:41:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:41:46,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2021-01-06 16:41:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:46,722 INFO L225 Difference]: With dead ends: 66 [2021-01-06 16:41:46,722 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 16:41:46,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:41:46,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 16:41:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-01-06 16:41:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:41:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-01-06 16:41:46,727 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-01-06 16:41:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:46,728 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-01-06 16:41:46,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:41:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-01-06 16:41:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:41:46,728 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:46,728 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:46,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:41:46,944 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2021-01-06 16:41:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:46,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614318903] [2021-01-06 16:41:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:47,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614318903] [2021-01-06 16:41:47,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785632222] [2021-01-06 16:41:47,521 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 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 [2021-01-06 16:41:48,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 16:41:48,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:48,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:41:48,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:48,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:48,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:41:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324569616] [2021-01-06 16:41:48,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:41:48,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:41:48,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:41:48,409 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2021-01-06 16:41:48,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:48,551 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-01-06 16:41:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:41:48,552 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2021-01-06 16:41:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:48,552 INFO L225 Difference]: With dead ends: 68 [2021-01-06 16:41:48,552 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 16:41:48,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:41:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 16:41:48,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 16:41:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:41:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-01-06 16:41:48,556 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-01-06 16:41:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:48,556 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-01-06 16:41:48,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:41:48,557 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-01-06 16:41:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:41:48,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:48,557 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:48,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:41:48,768 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2021-01-06 16:41:48,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:48,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555075973] [2021-01-06 16:41:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:49,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555075973] [2021-01-06 16:41:49,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147019910] [2021-01-06 16:41:49,451 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 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 [2021-01-06 16:41:49,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:41:49,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:49,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:41:49,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:49,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:49,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:41:49,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316270825] [2021-01-06 16:41:49,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:41:49,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:49,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:41:49,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:41:49,645 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2021-01-06 16:41:49,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:49,791 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-01-06 16:41:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:41:49,792 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2021-01-06 16:41:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:49,793 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:41:49,793 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:41:49,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:41:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:41:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-01-06 16:41:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 16:41:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-01-06 16:41:49,800 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-01-06 16:41:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:49,800 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-01-06 16:41:49,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:41:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-01-06 16:41:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 16:41:49,801 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:49,801 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:50,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:41:50,016 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2021-01-06 16:41:50,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:50,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770566885] [2021-01-06 16:41:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:50,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770566885] [2021-01-06 16:41:50,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607484928] [2021-01-06 16:41:50,730 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 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 [2021-01-06 16:41:52,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 16:41:52,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:52,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:41:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:52,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:52,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:41:52,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317053242] [2021-01-06 16:41:52,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:41:52,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:52,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:41:52,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:41:52,385 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2021-01-06 16:41:52,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:52,536 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-01-06 16:41:52,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:41:52,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2021-01-06 16:41:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:52,537 INFO L225 Difference]: With dead ends: 72 [2021-01-06 16:41:52,537 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 16:41:52,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:41:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 16:41:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-01-06 16:41:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:41:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-01-06 16:41:52,542 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-01-06 16:41:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:52,543 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-01-06 16:41:52,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:41:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-01-06 16:41:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:41:52,544 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:52,544 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:52,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:52,760 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:52,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2021-01-06 16:41:52,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:52,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285975801] [2021-01-06 16:41:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:41:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:53,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285975801] [2021-01-06 16:41:53,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178236266] [2021-01-06 16:41:53,494 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 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 [2021-01-06 16:41:59,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:41:59,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:41:59,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:41:59,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:41:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:41:59,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:41:59,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:41:59,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196487481] [2021-01-06 16:41:59,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:41:59,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:41:59,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:41:59,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:41:59,289 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2021-01-06 16:41:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:41:59,455 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-01-06 16:41:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:41:59,456 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2021-01-06 16:41:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:41:59,457 INFO L225 Difference]: With dead ends: 74 [2021-01-06 16:41:59,457 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 16:41:59,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:41:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 16:41:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-01-06 16:41:59,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 16:41:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-01-06 16:41:59,462 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-01-06 16:41:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:41:59,463 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-01-06 16:41:59,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:41:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-01-06 16:41:59,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 16:41:59,463 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:41:59,464 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:41:59,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:41:59,679 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:41:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:41:59,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2021-01-06 16:41:59,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:41:59,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211615097] [2021-01-06 16:41:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:41:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:00,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211615097] [2021-01-06 16:42:00,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222143409] [2021-01-06 16:42:00,541 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 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 [2021-01-06 16:42:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:00,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:42:00,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:00,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:00,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:42:00,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705906076] [2021-01-06 16:42:00,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:42:00,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:00,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:42:00,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:42:00,766 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2021-01-06 16:42:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:00,929 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-01-06 16:42:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:42:00,930 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2021-01-06 16:42:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:00,931 INFO L225 Difference]: With dead ends: 76 [2021-01-06 16:42:00,931 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:42:00,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:42:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:42:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-01-06 16:42:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 16:42:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-01-06 16:42:00,936 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-01-06 16:42:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:00,936 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-01-06 16:42:00,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:42:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-01-06 16:42:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:42:00,937 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:00,938 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:01,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:01,153 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2021-01-06 16:42:01,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:01,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564630328] [2021-01-06 16:42:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:01,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564630328] [2021-01-06 16:42:01,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180944875] [2021-01-06 16:42:01,962 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 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 [2021-01-06 16:42:02,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:42:02,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:02,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:42:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:02,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:02,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:42:02,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799825038] [2021-01-06 16:42:02,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:42:02,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:02,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:42:02,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:42:02,190 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2021-01-06 16:42:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:02,353 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-01-06 16:42:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:42:02,354 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2021-01-06 16:42:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:02,355 INFO L225 Difference]: With dead ends: 78 [2021-01-06 16:42:02,355 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 16:42:02,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:42:02,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 16:42:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-01-06 16:42:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:42:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-01-06 16:42:02,359 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-01-06 16:42:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:02,359 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-01-06 16:42:02,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:42:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-01-06 16:42:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:42:02,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:02,360 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:02,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:42:02,574 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:02,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2021-01-06 16:42:02,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:02,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439955215] [2021-01-06 16:42:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:03,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439955215] [2021-01-06 16:42:03,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136368490] [2021-01-06 16:42:03,480 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 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 [2021-01-06 16:42:04,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 16:42:04,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:04,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:42:04,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:04,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:04,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:42:04,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641700175] [2021-01-06 16:42:04,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:42:04,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:04,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:42:04,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:42:04,929 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2021-01-06 16:42:05,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:05,120 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-01-06 16:42:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:42:05,121 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2021-01-06 16:42:05,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:05,123 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:42:05,123 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 16:42:05,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:42:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 16:42:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-01-06 16:42:05,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:42:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-01-06 16:42:05,128 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-01-06 16:42:05,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:05,129 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-01-06 16:42:05,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:42:05,129 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-01-06 16:42:05,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:42:05,130 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:05,130 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:05,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:05,346 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2021-01-06 16:42:05,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:05,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057749237] [2021-01-06 16:42:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:06,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057749237] [2021-01-06 16:42:06,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542164327] [2021-01-06 16:42:06,285 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 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 [2021-01-06 16:42:06,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:42:06,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:06,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:42:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:06,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:06,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:42:06,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858043130] [2021-01-06 16:42:06,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:42:06,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:06,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:42:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:42:06,506 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2021-01-06 16:42:06,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:06,665 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-01-06 16:42:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:42:06,666 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2021-01-06 16:42:06,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:06,666 INFO L225 Difference]: With dead ends: 82 [2021-01-06 16:42:06,666 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 16:42:06,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:42:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 16:42:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-01-06 16:42:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:42:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-01-06 16:42:06,671 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-01-06 16:42:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:06,672 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-01-06 16:42:06,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:42:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-01-06 16:42:06,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 16:42:06,673 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:06,673 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:06,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:42:06,886 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:06,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2021-01-06 16:42:06,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:06,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357121424] [2021-01-06 16:42:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:07,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357121424] [2021-01-06 16:42:07,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439298834] [2021-01-06 16:42:07,836 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 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 [2021-01-06 16:42:10,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 16:42:10,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:10,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:42:10,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:10,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:10,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:42:10,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742457111] [2021-01-06 16:42:10,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:42:10,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:10,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:42:10,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:42:10,588 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2021-01-06 16:42:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:10,782 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-01-06 16:42:10,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:42:10,783 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2021-01-06 16:42:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:10,783 INFO L225 Difference]: With dead ends: 84 [2021-01-06 16:42:10,783 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 16:42:10,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:42:10,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 16:42:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-01-06 16:42:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:42:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-01-06 16:42:10,788 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-01-06 16:42:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:10,788 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-01-06 16:42:10,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:42:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-01-06 16:42:10,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:42:10,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:10,789 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:10,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:11,000 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:11,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2021-01-06 16:42:11,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:11,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699637265] [2021-01-06 16:42:11,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:12,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699637265] [2021-01-06 16:42:12,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788016618] [2021-01-06 16:42:12,059 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 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 [2021-01-06 16:42:23,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 16:42:23,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:23,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:42:23,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:23,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:23,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:42:23,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417439772] [2021-01-06 16:42:23,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:42:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:23,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:42:23,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:42:23,973 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2021-01-06 16:42:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:24,126 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-01-06 16:42:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:42:24,127 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2021-01-06 16:42:24,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:24,128 INFO L225 Difference]: With dead ends: 86 [2021-01-06 16:42:24,128 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:42:24,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:42:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:42:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-01-06 16:42:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:42:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-01-06 16:42:24,132 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-01-06 16:42:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:24,132 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-01-06 16:42:24,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:42:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-01-06 16:42:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-01-06 16:42:24,133 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:24,133 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:24,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:42:24,334 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2021-01-06 16:42:24,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:24,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488183602] [2021-01-06 16:42:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:25,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488183602] [2021-01-06 16:42:25,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455140926] [2021-01-06 16:42:25,311 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 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 [2021-01-06 16:42:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:25,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:42:25,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:25,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:25,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:42:25,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015881397] [2021-01-06 16:42:25,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:42:25,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:25,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:42:25,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:42:25,520 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2021-01-06 16:42:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:25,741 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-01-06 16:42:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:42:25,742 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2021-01-06 16:42:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:25,743 INFO L225 Difference]: With dead ends: 88 [2021-01-06 16:42:25,743 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 16:42:25,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:42:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 16:42:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-01-06 16:42:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:42:25,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-01-06 16:42:25,748 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-01-06 16:42:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:25,749 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-01-06 16:42:25,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:42:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-01-06 16:42:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:42:25,749 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:25,750 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:25,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:42:25,964 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:25,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2021-01-06 16:42:25,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:25,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935214370] [2021-01-06 16:42:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:27,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935214370] [2021-01-06 16:42:27,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624577840] [2021-01-06 16:42:27,115 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 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 [2021-01-06 16:42:27,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:42:27,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:27,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:42:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:27,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:27,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:42:27,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534950187] [2021-01-06 16:42:27,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:42:27,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:27,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:42:27,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:42:27,351 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2021-01-06 16:42:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:27,564 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-01-06 16:42:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:42:27,565 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2021-01-06 16:42:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:27,566 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:42:27,566 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:42:27,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:42:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:42:27,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 16:42:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:42:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-01-06 16:42:27,571 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-01-06 16:42:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:27,572 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-01-06 16:42:27,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:42:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-01-06 16:42:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 16:42:27,573 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:27,573 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:27,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:42:27,788 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2021-01-06 16:42:27,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:27,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953273556] [2021-01-06 16:42:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:28,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953273556] [2021-01-06 16:42:28,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118486642] [2021-01-06 16:42:28,911 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 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 [2021-01-06 16:42:31,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-01-06 16:42:31,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:31,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:42:31,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:31,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:31,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:42:31,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256594802] [2021-01-06 16:42:31,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:42:31,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:31,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:42:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:42:31,198 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2021-01-06 16:42:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:31,341 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-01-06 16:42:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:42:31,342 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2021-01-06 16:42:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:31,344 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:42:31,344 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:42:31,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:42:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:42:31,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-01-06 16:42:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:42:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-01-06 16:42:31,349 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-01-06 16:42:31,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:31,350 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-01-06 16:42:31,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:42:31,350 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-01-06 16:42:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:42:31,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:31,351 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:31,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:42:31,564 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2021-01-06 16:42:31,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:31,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855065710] [2021-01-06 16:42:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:32,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855065710] [2021-01-06 16:42:32,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734712914] [2021-01-06 16:42:32,751 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 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 [2021-01-06 16:42:32,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:42:32,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:42:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:42:32,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:42:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:32,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:42:32,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:42:32,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875262095] [2021-01-06 16:42:32,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:42:32,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:42:32,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:42:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:42:32,961 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2021-01-06 16:42:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:42:33,112 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-01-06 16:42:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:42:33,113 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2021-01-06 16:42:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:42:33,114 INFO L225 Difference]: With dead ends: 94 [2021-01-06 16:42:33,114 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:42:33,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:42:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:42:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-01-06 16:42:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 16:42:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-01-06 16:42:33,118 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-01-06 16:42:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:42:33,118 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-01-06 16:42:33,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:42:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-01-06 16:42:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 16:42:33,119 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:42:33,119 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2021-01-06 16:42:33,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:42:33,334 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:42:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:42:33,335 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2021-01-06 16:42:33,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:42:33,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314085419] [2021-01-06 16:42:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:42:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:42:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:42:34,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314085419] [2021-01-06 16:42:34,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77751864] [2021-01-06 16:42:34,563 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 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 [2021-01-06 16:43:13,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:43:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:43:14,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:14,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:14,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:43:14,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763183820] [2021-01-06 16:43:14,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:43:14,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:14,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:43:14,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:43:14,142 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2021-01-06 16:43:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:14,337 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-01-06 16:43:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:43:14,338 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2021-01-06 16:43:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:14,339 INFO L225 Difference]: With dead ends: 96 [2021-01-06 16:43:14,339 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 16:43:14,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:43:14,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 16:43:14,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-01-06 16:43:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 16:43:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-01-06 16:43:14,343 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-01-06 16:43:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:14,343 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-01-06 16:43:14,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:43:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-01-06 16:43:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 16:43:14,344 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:14,345 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:14,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 16:43:14,558 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:14,558 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2021-01-06 16:43:14,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:14,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231070367] [2021-01-06 16:43:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:15,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231070367] [2021-01-06 16:43:15,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003072331] [2021-01-06 16:43:15,838 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 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 [2021-01-06 16:43:56,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-01-06 16:43:56,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:43:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:43:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:56,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:56,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:43:56,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333012473] [2021-01-06 16:43:56,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:43:56,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:43:56,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:43:56,850 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2021-01-06 16:43:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:57,032 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-01-06 16:43:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:43:57,032 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2021-01-06 16:43:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:57,033 INFO L225 Difference]: With dead ends: 98 [2021-01-06 16:43:57,033 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:43:57,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:43:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:43:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-01-06 16:43:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 16:43:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-01-06 16:43:57,041 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-01-06 16:43:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:57,043 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-01-06 16:43:57,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:43:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-01-06 16:43:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-01-06 16:43:57,045 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:57,045 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:57,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:57,259 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:57,259 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2021-01-06 16:43:57,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:57,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821818196] [2021-01-06 16:43:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:58,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821818196] [2021-01-06 16:43:58,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613512513] [2021-01-06 16:43:58,553 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 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 [2021-01-06 16:43:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:43:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:43:58,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:43:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:43:58,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:43:58,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:43:58,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232819211] [2021-01-06 16:43:58,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:43:58,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:43:58,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:43:58,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:43:58,787 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2021-01-06 16:43:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:43:58,949 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-01-06 16:43:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:43:58,950 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2021-01-06 16:43:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:43:58,951 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:43:58,951 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:43:58,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:43:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:43:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-01-06 16:43:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 16:43:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-01-06 16:43:58,956 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-01-06 16:43:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:43:58,957 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-01-06 16:43:58,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:43:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-01-06 16:43:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:43:58,958 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:43:58,958 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2021-01-06 16:43:59,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:43:59,172 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:43:59,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:43:59,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2021-01-06 16:43:59,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:43:59,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868602799] [2021-01-06 16:43:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:43:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:00,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868602799] [2021-01-06 16:44:00,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755529567] [2021-01-06 16:44:00,549 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:00,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:44:00,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:00,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:44:00,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:00,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:00,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 16:44:00,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456440606] [2021-01-06 16:44:00,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:44:00,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:44:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:44:00,768 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2021-01-06 16:44:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:00,959 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-01-06 16:44:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:44:00,960 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2021-01-06 16:44:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:00,960 INFO L225 Difference]: With dead ends: 102 [2021-01-06 16:44:00,961 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 16:44:00,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:44:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 16:44:00,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-01-06 16:44:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 16:44:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-01-06 16:44:00,964 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-01-06 16:44:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:00,965 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-01-06 16:44:00,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:44:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-01-06 16:44:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:44:00,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:00,966 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:01,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 16:44:01,181 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:01,181 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2021-01-06 16:44:01,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:01,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584139671] [2021-01-06 16:44:01,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:02,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584139671] [2021-01-06 16:44:02,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773274818] [2021-01-06 16:44:02,598 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:08,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 16:44:08,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:08,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:44:08,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:08,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:08,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:44:08,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536990473] [2021-01-06 16:44:08,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:44:08,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:08,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:44:08,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:44:08,482 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2021-01-06 16:44:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:08,658 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-01-06 16:44:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:44:08,659 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2021-01-06 16:44:08,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:08,660 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:44:08,660 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 16:44:08,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:44:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 16:44:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-01-06 16:44:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 16:44:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-01-06 16:44:08,665 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-01-06 16:44:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:08,665 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-01-06 16:44:08,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:44:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-01-06 16:44:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 16:44:08,666 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:08,666 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:08,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:44:08,881 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:08,881 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2021-01-06 16:44:08,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:08,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142982472] [2021-01-06 16:44:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:10,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142982472] [2021-01-06 16:44:10,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571766461] [2021-01-06 16:44:10,384 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:10,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:44:10,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:10,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:44:10,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:10,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:10,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 16:44:10,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445585811] [2021-01-06 16:44:10,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:44:10,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:10,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:44:10,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:44:10,637 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2021-01-06 16:44:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:10,832 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-01-06 16:44:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:44:10,833 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2021-01-06 16:44:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:10,834 INFO L225 Difference]: With dead ends: 106 [2021-01-06 16:44:10,834 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 16:44:10,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:44:10,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 16:44:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-01-06 16:44:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:44:10,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-01-06 16:44:10,838 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-01-06 16:44:10,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:10,838 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-01-06 16:44:10,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:44:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-01-06 16:44:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 16:44:10,839 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:10,839 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:11,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:44:11,054 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:11,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2021-01-06 16:44:11,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:11,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118188061] [2021-01-06 16:44:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:12,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118188061] [2021-01-06 16:44:12,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327334557] [2021-01-06 16:44:12,563 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:45,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-01-06 16:44:45,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:44:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:44:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:44:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:45,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:44:45,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:44:45,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543352039] [2021-01-06 16:44:45,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:44:45,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:44:45,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:44:45,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:44:45,819 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2021-01-06 16:44:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:44:45,992 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-01-06 16:44:45,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:44:45,993 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2021-01-06 16:44:45,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:44:45,994 INFO L225 Difference]: With dead ends: 108 [2021-01-06 16:44:45,994 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 16:44:45,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:44:45,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 16:44:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-01-06 16:44:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2021-01-06 16:44:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-01-06 16:44:46,002 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-01-06 16:44:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:44:46,002 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-01-06 16:44:46,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:44:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-01-06 16:44:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 16:44:46,003 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:44:46,003 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2021-01-06 16:44:46,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:44:46,217 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:44:46,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:44:46,218 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2021-01-06 16:44:46,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:44:46,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970084127] [2021-01-06 16:44:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:44:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:44:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:44:47,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970084127] [2021-01-06 16:44:47,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801598106] [2021-01-06 16:44:47,834 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:30,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-01-06 16:45:30,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:30,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:45:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:30,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:30,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 16:45:30,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624160967] [2021-01-06 16:45:30,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:45:30,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:30,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:45:30,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:45:30,262 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2021-01-06 16:45:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:30,464 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-01-06 16:45:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:45:30,465 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2021-01-06 16:45:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:30,465 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:45:30,465 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:45:30,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:45:30,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:45:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-01-06 16:45:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 16:45:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-01-06 16:45:30,470 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-01-06 16:45:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:30,470 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-01-06 16:45:30,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:45:30,471 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-01-06 16:45:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-01-06 16:45:30,471 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:30,471 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:30,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:45:30,687 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:30,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:30,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2021-01-06 16:45:30,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:30,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158058710] [2021-01-06 16:45:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:32,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158058710] [2021-01-06 16:45:32,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124989104] [2021-01-06 16:45:32,277 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:32,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:45:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:32,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:32,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:45:32,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440141682] [2021-01-06 16:45:32,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:45:32,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:32,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:45:32,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:45:32,550 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2021-01-06 16:45:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:32,791 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-01-06 16:45:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:45:32,791 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2021-01-06 16:45:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:32,792 INFO L225 Difference]: With dead ends: 112 [2021-01-06 16:45:32,792 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 16:45:32,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:45:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 16:45:32,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-01-06 16:45:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 16:45:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-01-06 16:45:32,796 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-01-06 16:45:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:32,796 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-01-06 16:45:32,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:45:32,797 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-01-06 16:45:32,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 16:45:32,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:32,797 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:33,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:45:33,011 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2021-01-06 16:45:33,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:33,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670951080] [2021-01-06 16:45:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:34,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670951080] [2021-01-06 16:45:34,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865316213] [2021-01-06 16:45:34,753 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:34,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:45:34,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:34,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:45:34,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:35,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:35,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 16:45:35,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339415278] [2021-01-06 16:45:35,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:45:35,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:45:35,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:45:35,023 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2021-01-06 16:45:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:35,245 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-01-06 16:45:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:45:35,246 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2021-01-06 16:45:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:35,247 INFO L225 Difference]: With dead ends: 114 [2021-01-06 16:45:35,247 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 16:45:35,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:45:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 16:45:35,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-01-06 16:45:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-01-06 16:45:35,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-01-06 16:45:35,251 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-01-06 16:45:35,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:35,252 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-01-06 16:45:35,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:45:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-01-06 16:45:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-01-06 16:45:35,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:35,253 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:35,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:35,468 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:35,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2021-01-06 16:45:35,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:35,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684646160] [2021-01-06 16:45:35,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:37,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684646160] [2021-01-06 16:45:37,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232889957] [2021-01-06 16:45:37,244 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:42,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-01-06 16:45:42,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:45:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:42,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:42,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:45:42,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463586724] [2021-01-06 16:45:42,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:45:42,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:45:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:45:42,295 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2021-01-06 16:45:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:42,514 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-01-06 16:45:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:45:42,517 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2021-01-06 16:45:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:42,518 INFO L225 Difference]: With dead ends: 116 [2021-01-06 16:45:42,518 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:45:42,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:45:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:45:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-01-06 16:45:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 16:45:42,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-01-06 16:45:42,522 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-01-06 16:45:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:42,523 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-01-06 16:45:42,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:45:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-01-06 16:45:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 16:45:42,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:42,524 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:42,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 16:45:42,731 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:42,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2021-01-06 16:45:42,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:42,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564732629] [2021-01-06 16:45:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:45:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:44,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564732629] [2021-01-06 16:45:44,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483791797] [2021-01-06 16:45:44,712 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:44,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:45:44,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:45:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:45:44,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:45:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:45:45,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:45:45,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 16:45:45,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686881471] [2021-01-06 16:45:45,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:45:45,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:45:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:45:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:45:45,005 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2021-01-06 16:45:45,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:45:45,227 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-01-06 16:45:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:45:45,227 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2021-01-06 16:45:45,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:45:45,228 INFO L225 Difference]: With dead ends: 118 [2021-01-06 16:45:45,228 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 16:45:45,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:45:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 16:45:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-01-06 16:45:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 16:45:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-01-06 16:45:45,233 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-01-06 16:45:45,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:45:45,233 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-01-06 16:45:45,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:45:45,233 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-01-06 16:45:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 16:45:45,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:45:45,234 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2021-01-06 16:45:45,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:45:45,449 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:45:45,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:45:45,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2021-01-06 16:45:45,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:45:45,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201715149] [2021-01-06 16:45:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:45:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat