/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:48:31,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:48:31,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:48:31,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:48:31,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:48:31,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:48:31,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:48:31,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:48:31,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:48:31,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:48:31,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:48:31,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:48:31,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:48:31,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:48:31,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:48:31,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:48:31,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:48:31,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:48:31,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:48:31,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:48:31,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:48:31,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:48:31,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:48:31,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:48:31,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:48:31,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 23:48:31,775 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 23:48:31,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 23:48:31,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 23:48:31,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 23:48:31,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 23:48:31,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 23:48:31,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 23:48:31,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:48:31,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:48:31,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:48:31,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:48:31,819 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:48:31,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:48:31,820 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:48:31,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:48:31,821 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:48:31,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:48:31,821 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:48:31,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:48:31,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:48:31,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:48:31,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:48:31,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:48:31,823 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:48:31,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:48:31,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:48:31,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:48:31,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:48:31,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:31,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:48:31,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:48:31,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:48:31,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:48:31,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:48:31,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:48:31,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:48:31,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:48:32,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:48:32,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:48:32,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:48:32,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:48:32,263 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:48:32,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2020-12-22 23:48:32,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/27ac26d49/ae40e7f1093e499bb9f330c9ac32bbf0/FLAG5cff62a14 [2020-12-22 23:48:32,917 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:48:32,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2020-12-22 23:48:32,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/27ac26d49/ae40e7f1093e499bb9f330c9ac32bbf0/FLAG5cff62a14 [2020-12-22 23:48:33,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/27ac26d49/ae40e7f1093e499bb9f330c9ac32bbf0 [2020-12-22 23:48:33,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:48:33,280 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:48:33,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:33,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:48:33,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:48:33,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7633a1d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33, skipping insertion in model container [2020-12-22 23:48:33,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:48:33,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:48:33,568 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:33,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:33,615 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:48:33,635 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] [2020-12-22 23:48:33,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:48:33,688 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:48:33,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33 WrapperNode [2020-12-22 23:48:33,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:48:33,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:33,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:48:33,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:48:33,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,745 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:48:33,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:48:33,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:48:33,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:48:33,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... [2020-12-22 23:48:33,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:48:33,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:48:33,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:48:33,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:48:33,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:48:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:48:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:48:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:48:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:48:33,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:48:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:48:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:48:34,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:48:34,290 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 23:48:34,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:34 BoogieIcfgContainer [2020-12-22 23:48:34,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:48:34,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:48:34,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:48:34,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:48:34,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:48:33" (1/3) ... [2020-12-22 23:48:34,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2daab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:34, skipping insertion in model container [2020-12-22 23:48:34,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:48:33" (2/3) ... [2020-12-22 23:48:34,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a2daab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:48:34, skipping insertion in model container [2020-12-22 23:48:34,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:48:34" (3/3) ... [2020-12-22 23:48:34,302 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2020-12-22 23:48:34,313 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:48:34,318 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:48:34,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:48:34,373 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:48:34,374 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:48:34,375 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:48:34,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:48:34,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:48:34,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:48:34,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:48:34,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:48:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 23:48:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 23:48:34,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,443 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2020-12-22 23:48:34,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628135670] [2020-12-22 23:48:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:34,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628135670] [2020-12-22 23:48:34,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:34,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:48:34,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665274823] [2020-12-22 23:48:34,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:48:34,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:34,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:48:34,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:34,776 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-22 23:48:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:34,858 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2020-12-22 23:48:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:48:34,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 23:48:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:34,879 INFO L225 Difference]: With dead ends: 44 [2020-12-22 23:48:34,880 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 23:48:34,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:48:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 23:48:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 23:48:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 23:48:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-22 23:48:34,929 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2020-12-22 23:48:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:34,929 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-22 23:48:34,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:48:34,930 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-22 23:48:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 23:48:34,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:34,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:34,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:48:34,934 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:34,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2020-12-22 23:48:34,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:34,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401790628] [2020-12-22 23:48:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:48:35,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401790628] [2020-12-22 23:48:35,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581349590] [2020-12-22 23:48:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:35,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:48:35,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-12-22 23:48:35,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129403824] [2020-12-22 23:48:35,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:35,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:35,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:35,238 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2020-12-22 23:48:35,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,293 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-12-22 23:48:35,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:35,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-22 23:48:35,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,295 INFO L225 Difference]: With dead ends: 35 [2020-12-22 23:48:35,295 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 23:48:35,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 23:48:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 23:48:35,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-12-22 23:48:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 23:48:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-22 23:48:35,301 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2020-12-22 23:48:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,302 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-22 23:48:35,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:35,302 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-22 23:48:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 23:48:35,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:48:35,518 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2020-12-22 23:48:35,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571317994] [2020-12-22 23:48:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:35,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571317994] [2020-12-22 23:48:35,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120233527] [2020-12-22 23:48:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:48:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:48:35,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:35,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:48:35,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75967314] [2020-12-22 23:48:35,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:48:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:35,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:48:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:35,655 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2020-12-22 23:48:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:35,689 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-12-22 23:48:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:35,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 23:48:35,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:35,691 INFO L225 Difference]: With dead ends: 44 [2020-12-22 23:48:35,691 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 23:48:35,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:48:35,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 23:48:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2020-12-22 23:48:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 23:48:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-22 23:48:35,697 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 15 [2020-12-22 23:48:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:35,697 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-22 23:48:35,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:48:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-22 23:48:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:48:35,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:35,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:35,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:35,913 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1470988923, now seen corresponding path program 2 times [2020-12-22 23:48:35,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:35,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74589015] [2020-12-22 23:48:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:36,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74589015] [2020-12-22 23:48:36,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:48:36,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 23:48:36,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288531163] [2020-12-22 23:48:36,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 23:48:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 23:48:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:36,008 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2020-12-22 23:48:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,073 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-22 23:48:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:48:36,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-22 23:48:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,078 INFO L225 Difference]: With dead ends: 42 [2020-12-22 23:48:36,078 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 23:48:36,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 23:48:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 23:48:36,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-22 23:48:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 23:48:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-22 23:48:36,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2020-12-22 23:48:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,088 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-22 23:48:36,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 23:48:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-22 23:48:36,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 23:48:36,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 23:48:36,093 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1546796147, now seen corresponding path program 1 times [2020-12-22 23:48:36,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8952518] [2020-12-22 23:48:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 23:48:36,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8952518] [2020-12-22 23:48:36,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365216681] [2020-12-22 23:48:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 23:48:36,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-12-22 23:48:36,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697437689] [2020-12-22 23:48:36,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 23:48:36,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 23:48:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:36,310 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 10 states. [2020-12-22 23:48:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,458 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-12-22 23:48:36,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:48:36,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-22 23:48:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,460 INFO L225 Difference]: With dead ends: 53 [2020-12-22 23:48:36,460 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 23:48:36,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 23:48:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-12-22 23:48:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 23:48:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2020-12-22 23:48:36,468 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2020-12-22 23:48:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:36,468 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2020-12-22 23:48:36,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 23:48:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2020-12-22 23:48:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 23:48:36,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:36,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:36,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,685 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:36,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1858460768, now seen corresponding path program 2 times [2020-12-22 23:48:36,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:36,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017495680] [2020-12-22 23:48:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:36,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017495680] [2020-12-22 23:48:36,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534519818] [2020-12-22 23:48:36,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:36,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:36,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:36,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:36,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:36,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:48:36,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806204356] [2020-12-22 23:48:36,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:48:36,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:48:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:36,921 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 7 states. [2020-12-22 23:48:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:36,996 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-12-22 23:48:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:48:36,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-22 23:48:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:36,998 INFO L225 Difference]: With dead ends: 74 [2020-12-22 23:48:36,998 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 23:48:36,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:48:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 23:48:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 33. [2020-12-22 23:48:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 23:48:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-22 23:48:37,014 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 25 [2020-12-22 23:48:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,014 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-22 23:48:37,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:48:37,015 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-22 23:48:37,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 23:48:37,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:37,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,233 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1667419550, now seen corresponding path program 3 times [2020-12-22 23:48:37,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956995195] [2020-12-22 23:48:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:48:37,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956995195] [2020-12-22 23:48:37,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529350883] [2020-12-22 23:48:37,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:48:37,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 23:48:37,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-12-22 23:48:37,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664021387] [2020-12-22 23:48:37,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:48:37,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:48:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:48:37,405 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 8 states. [2020-12-22 23:48:37,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:37,489 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-12-22 23:48:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:48:37,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-22 23:48:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:37,490 INFO L225 Difference]: With dead ends: 74 [2020-12-22 23:48:37,490 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 23:48:37,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 23:48:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 23:48:37,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-12-22 23:48:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 23:48:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-12-22 23:48:37,498 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 27 [2020-12-22 23:48:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:37,498 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-12-22 23:48:37,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:48:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-12-22 23:48:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 23:48:37,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:37,500 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:37,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 23:48:37,715 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash -751854596, now seen corresponding path program 4 times [2020-12-22 23:48:37,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:37,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394010335] [2020-12-22 23:48:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:48:37,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394010335] [2020-12-22 23:48:37,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742273622] [2020-12-22 23:48:37,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:37,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:37,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:37,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:48:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:48:37,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:37,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 23:48:37,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649662930] [2020-12-22 23:48:37,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:48:37,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:37,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:48:37,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:37,956 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 9 states. [2020-12-22 23:48:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:38,037 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2020-12-22 23:48:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:48:38,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-12-22 23:48:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:38,038 INFO L225 Difference]: With dead ends: 98 [2020-12-22 23:48:38,039 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 23:48:38,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:48:38,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 23:48:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 47. [2020-12-22 23:48:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 23:48:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-12-22 23:48:38,047 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 35 [2020-12-22 23:48:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:38,047 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-12-22 23:48:38,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:48:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-12-22 23:48:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 23:48:38,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:38,049 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:38,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:38,263 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:38,264 INFO L82 PathProgramCache]: Analyzing trace with hash 276207546, now seen corresponding path program 5 times [2020-12-22 23:48:38,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:38,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022101159] [2020-12-22 23:48:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 23:48:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022101159] [2020-12-22 23:48:38,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843481758] [2020-12-22 23:48:38,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:38,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 23:48:38,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:48:38,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 23:48:38,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:38,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 23:48:38,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295420572] [2020-12-22 23:48:38,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 23:48:38,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:38,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 23:48:38,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 23:48:38,573 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 16 states. [2020-12-22 23:48:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:39,125 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2020-12-22 23:48:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:48:39,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-12-22 23:48:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:39,126 INFO L225 Difference]: With dead ends: 108 [2020-12-22 23:48:39,126 INFO L226 Difference]: Without dead ends: 76 [2020-12-22 23:48:39,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 23:48:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-22 23:48:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-12-22 23:48:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 23:48:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2020-12-22 23:48:39,138 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 37 [2020-12-22 23:48:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:39,139 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2020-12-22 23:48:39,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 23:48:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2020-12-22 23:48:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 23:48:39,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:39,141 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:39,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:39,356 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash 611906722, now seen corresponding path program 6 times [2020-12-22 23:48:39,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:39,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667278940] [2020-12-22 23:48:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-12-22 23:48:39,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667278940] [2020-12-22 23:48:39,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049215879] [2020-12-22 23:48:39,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:39,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 23:48:39,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:39,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:48:39,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 48 proven. 5 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-22 23:48:39,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:39,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2020-12-22 23:48:39,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897058602] [2020-12-22 23:48:39,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:48:39,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:39,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:48:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:48:39,656 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 14 states. [2020-12-22 23:48:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,092 INFO L93 Difference]: Finished difference Result 142 states and 186 transitions. [2020-12-22 23:48:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 23:48:40,093 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-12-22 23:48:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,094 INFO L225 Difference]: With dead ends: 142 [2020-12-22 23:48:40,094 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 23:48:40,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:48:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 23:48:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-12-22 23:48:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:48:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2020-12-22 23:48:40,107 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 54 [2020-12-22 23:48:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,107 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2020-12-22 23:48:40,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:48:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2020-12-22 23:48:40,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 23:48:40,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,109 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:40,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 23:48:40,324 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1429837393, now seen corresponding path program 7 times [2020-12-22 23:48:40,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:40,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272823080] [2020-12-22 23:48:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-22 23:48:40,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272823080] [2020-12-22 23:48:40,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328930074] [2020-12-22 23:48:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:48:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-22 23:48:40,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:40,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:48:40,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278597945] [2020-12-22 23:48:40,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:48:40,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:40,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:48:40,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:40,663 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 12 states. [2020-12-22 23:48:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:40,784 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2020-12-22 23:48:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:48:40,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-12-22 23:48:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:40,785 INFO L225 Difference]: With dead ends: 148 [2020-12-22 23:48:40,786 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 23:48:40,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:48:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 23:48:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 74. [2020-12-22 23:48:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 23:48:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-12-22 23:48:40,799 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 68 [2020-12-22 23:48:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:40,800 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-12-22 23:48:40,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:48:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-12-22 23:48:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 23:48:40,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:40,802 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:41,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:41,003 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash 824073649, now seen corresponding path program 8 times [2020-12-22 23:48:41,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916037592] [2020-12-22 23:48:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-22 23:48:41,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916037592] [2020-12-22 23:48:41,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338198955] [2020-12-22 23:48:41,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:41,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:48:41,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-22 23:48:41,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:41,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 23:48:41,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446660007] [2020-12-22 23:48:41,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 23:48:41,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:41,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 23:48:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:41,386 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 13 states. [2020-12-22 23:48:41,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:41,517 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2020-12-22 23:48:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:48:41,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 70 [2020-12-22 23:48:41,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:41,519 INFO L225 Difference]: With dead ends: 165 [2020-12-22 23:48:41,519 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 23:48:41,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 23:48:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 23:48:41,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 76. [2020-12-22 23:48:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 23:48:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2020-12-22 23:48:41,530 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 70 [2020-12-22 23:48:41,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:41,530 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2020-12-22 23:48:41,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 23:48:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2020-12-22 23:48:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 23:48:41,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:41,532 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:41,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:41,746 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:41,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:41,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2125899469, now seen corresponding path program 9 times [2020-12-22 23:48:41,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:41,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146701026] [2020-12-22 23:48:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-22 23:48:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146701026] [2020-12-22 23:48:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568813028] [2020-12-22 23:48:41,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:42,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 23:48:42,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:42,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:48:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:42,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:42,128 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:42,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:42,149 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2020-12-22 23:48:42,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:42,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2020-12-22 23:48:42,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621610970] [2020-12-22 23:48:42,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:42,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:42,172 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 18 states. [2020-12-22 23:48:43,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:43,238 INFO L93 Difference]: Finished difference Result 416 states and 574 transitions. [2020-12-22 23:48:43,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 23:48:43,238 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-12-22 23:48:43,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:43,243 INFO L225 Difference]: With dead ends: 416 [2020-12-22 23:48:43,243 INFO L226 Difference]: Without dead ends: 354 [2020-12-22 23:48:43,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=961, Invalid=3071, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 23:48:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-22 23:48:43,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 123. [2020-12-22 23:48:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 23:48:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2020-12-22 23:48:43,271 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 72 [2020-12-22 23:48:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:43,271 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2020-12-22 23:48:43,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:43,271 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2020-12-22 23:48:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 23:48:43,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:43,273 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:43,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 23:48:43,488 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1439444272, now seen corresponding path program 10 times [2020-12-22 23:48:43,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:43,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387482321] [2020-12-22 23:48:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2020-12-22 23:48:43,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387482321] [2020-12-22 23:48:43,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988564006] [2020-12-22 23:48:43,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:43,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:48:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:43,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 23:48:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2020-12-22 23:48:43,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:43,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 23:48:43,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904503749] [2020-12-22 23:48:43,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 23:48:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 23:48:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:43,953 INFO L87 Difference]: Start difference. First operand 123 states and 164 transitions. Second operand 15 states. [2020-12-22 23:48:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:44,159 INFO L93 Difference]: Finished difference Result 731 states and 1031 transitions. [2020-12-22 23:48:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:48:44,159 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 119 [2020-12-22 23:48:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:44,163 INFO L225 Difference]: With dead ends: 731 [2020-12-22 23:48:44,163 INFO L226 Difference]: Without dead ends: 633 [2020-12-22 23:48:44,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 23:48:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-12-22 23:48:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 125. [2020-12-22 23:48:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 23:48:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2020-12-22 23:48:44,183 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 119 [2020-12-22 23:48:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:44,184 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2020-12-22 23:48:44,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 23:48:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2020-12-22 23:48:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 23:48:44,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:44,186 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:44,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 23:48:44,401 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1454337138, now seen corresponding path program 11 times [2020-12-22 23:48:44,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:44,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382498660] [2020-12-22 23:48:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2020-12-22 23:48:44,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382498660] [2020-12-22 23:48:44,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696218419] [2020-12-22 23:48:44,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:44,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 23:48:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:44,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:44,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 556 proven. 34 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-12-22 23:48:44,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:44,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2020-12-22 23:48:44,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077543382] [2020-12-22 23:48:44,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:48:44,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:44,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:48:44,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:44,937 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand 23 states. [2020-12-22 23:48:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:49,272 INFO L93 Difference]: Finished difference Result 1125 states and 1584 transitions. [2020-12-22 23:48:49,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-12-22 23:48:49,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2020-12-22 23:48:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:49,277 INFO L225 Difference]: With dead ends: 1125 [2020-12-22 23:48:49,278 INFO L226 Difference]: Without dead ends: 889 [2020-12-22 23:48:49,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9812 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5039, Invalid=17913, Unknown=0, NotChecked=0, Total=22952 [2020-12-22 23:48:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-12-22 23:48:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 187. [2020-12-22 23:48:49,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 23:48:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 239 transitions. [2020-12-22 23:48:49,320 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 239 transitions. Word has length 121 [2020-12-22 23:48:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:49,321 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 239 transitions. [2020-12-22 23:48:49,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:48:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 239 transitions. [2020-12-22 23:48:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 23:48:49,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:49,325 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:49,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 23:48:49,541 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:49,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1722627106, now seen corresponding path program 12 times [2020-12-22 23:48:49,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:49,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392861606] [2020-12-22 23:48:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1776 trivial. 0 not checked. [2020-12-22 23:48:49,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392861606] [2020-12-22 23:48:49,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225713987] [2020-12-22 23:48:49,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:49,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 23:48:49,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:49,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:48:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:50,174 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:50,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:50,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:50,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 327 proven. 12 refuted. 0 times theorem prover too weak. 1606 trivial. 0 not checked. [2020-12-22 23:48:50,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:50,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2020-12-22 23:48:50,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061256151] [2020-12-22 23:48:50,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 23:48:50,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:50,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 23:48:50,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-12-22 23:48:50,284 INFO L87 Difference]: Start difference. First operand 187 states and 239 transitions. Second operand 23 states. [2020-12-22 23:48:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:52,763 INFO L93 Difference]: Finished difference Result 1135 states and 1546 transitions. [2020-12-22 23:48:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-12-22 23:48:52,763 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 159 [2020-12-22 23:48:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:52,768 INFO L225 Difference]: With dead ends: 1135 [2020-12-22 23:48:52,768 INFO L226 Difference]: Without dead ends: 967 [2020-12-22 23:48:52,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3897 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2580, Invalid=8340, Unknown=0, NotChecked=0, Total=10920 [2020-12-22 23:48:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-12-22 23:48:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 234. [2020-12-22 23:48:52,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-22 23:48:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 312 transitions. [2020-12-22 23:48:52,823 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 312 transitions. Word has length 159 [2020-12-22 23:48:52,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:52,823 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 312 transitions. [2020-12-22 23:48:52,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 23:48:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 312 transitions. [2020-12-22 23:48:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-22 23:48:52,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:52,826 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:53,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:53,042 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:53,043 INFO L82 PathProgramCache]: Analyzing trace with hash -440442825, now seen corresponding path program 13 times [2020-12-22 23:48:53,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:53,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768028205] [2020-12-22 23:48:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3711 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-12-22 23:48:53,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768028205] [2020-12-22 23:48:53,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626896563] [2020-12-22 23:48:53,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:53,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 23:48:53,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3711 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-12-22 23:48:53,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:53,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 23:48:53,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013372016] [2020-12-22 23:48:53,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:48:53,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:53,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:48:53,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:53,706 INFO L87 Difference]: Start difference. First operand 234 states and 312 transitions. Second operand 18 states. [2020-12-22 23:48:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:54,149 INFO L93 Difference]: Finished difference Result 1537 states and 2129 transitions. [2020-12-22 23:48:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 23:48:54,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 206 [2020-12-22 23:48:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:54,157 INFO L225 Difference]: With dead ends: 1537 [2020-12-22 23:48:54,157 INFO L226 Difference]: Without dead ends: 1334 [2020-12-22 23:48:54,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:48:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2020-12-22 23:48:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 236. [2020-12-22 23:48:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-12-22 23:48:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 314 transitions. [2020-12-22 23:48:54,214 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 314 transitions. Word has length 206 [2020-12-22 23:48:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:54,215 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 314 transitions. [2020-12-22 23:48:54,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:48:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 314 transitions. [2020-12-22 23:48:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 23:48:54,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:54,218 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:54,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 23:48:54,433 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash -672818759, now seen corresponding path program 14 times [2020-12-22 23:48:54,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:54,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957173608] [2020-12-22 23:48:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-12-22 23:48:54,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957173608] [2020-12-22 23:48:54,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741211111] [2020-12-22 23:48:54,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:54,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:48:54,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:54,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 23:48:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3740 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-12-22 23:48:55,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:55,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 23:48:55,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138837599] [2020-12-22 23:48:55,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 23:48:55,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:55,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 23:48:55,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:55,111 INFO L87 Difference]: Start difference. First operand 236 states and 314 transitions. Second operand 19 states. [2020-12-22 23:48:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:48:55,544 INFO L93 Difference]: Finished difference Result 1709 states and 2367 transitions. [2020-12-22 23:48:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:48:55,545 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 208 [2020-12-22 23:48:55,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:48:55,552 INFO L225 Difference]: With dead ends: 1709 [2020-12-22 23:48:55,552 INFO L226 Difference]: Without dead ends: 1506 [2020-12-22 23:48:55,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 23:48:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2020-12-22 23:48:55,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 238. [2020-12-22 23:48:55,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-12-22 23:48:55,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 316 transitions. [2020-12-22 23:48:55,607 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 316 transitions. Word has length 208 [2020-12-22 23:48:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:48:55,607 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 316 transitions. [2020-12-22 23:48:55,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 23:48:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 316 transitions. [2020-12-22 23:48:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 23:48:55,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:48:55,610 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 16, 16, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:48:55,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 23:48:55,824 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:48:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:48:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash -647791941, now seen corresponding path program 15 times [2020-12-22 23:48:55,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:48:55,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792369113] [2020-12-22 23:48:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:48:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:48:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-12-22 23:48:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792369113] [2020-12-22 23:48:56,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347645608] [2020-12-22 23:48:56,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:48:56,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 23:48:56,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:48:56,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:48:56,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:48:56,484 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:56,514 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:56,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:56,546 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:48:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 592 proven. 22 refuted. 0 times theorem prover too weak. 3157 trivial. 0 not checked. [2020-12-22 23:48:56,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:48:56,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2020-12-22 23:48:56,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409762670] [2020-12-22 23:48:56,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 23:48:56,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:48:56,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 23:48:56,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:48:56,589 INFO L87 Difference]: Start difference. First operand 238 states and 316 transitions. Second operand 27 states. [2020-12-22 23:49:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:01,948 INFO L93 Difference]: Finished difference Result 1622 states and 2265 transitions. [2020-12-22 23:49:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2020-12-22 23:49:01,948 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 210 [2020-12-22 23:49:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:01,955 INFO L225 Difference]: With dead ends: 1622 [2020-12-22 23:49:01,955 INFO L226 Difference]: Without dead ends: 1407 [2020-12-22 23:49:01,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11036 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6085, Invalid=20975, Unknown=0, NotChecked=0, Total=27060 [2020-12-22 23:49:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2020-12-22 23:49:02,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 324. [2020-12-22 23:49:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-12-22 23:49:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 444 transitions. [2020-12-22 23:49:02,078 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 444 transitions. Word has length 210 [2020-12-22 23:49:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:02,078 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 444 transitions. [2020-12-22 23:49:02,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 23:49:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 444 transitions. [2020-12-22 23:49:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-12-22 23:49:02,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:02,081 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:02,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:02,295 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -912802302, now seen corresponding path program 16 times [2020-12-22 23:49:02,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:02,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597377999] [2020-12-22 23:49:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 7448 trivial. 0 not checked. [2020-12-22 23:49:02,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597377999] [2020-12-22 23:49:02,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623107827] [2020-12-22 23:49:02,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:02,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:02,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:02,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 23:49:02,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7737 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 7448 trivial. 0 not checked. [2020-12-22 23:49:03,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:03,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 23:49:03,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544328415] [2020-12-22 23:49:03,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 23:49:03,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:03,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 23:49:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:49:03,200 INFO L87 Difference]: Start difference. First operand 324 states and 444 transitions. Second operand 21 states. [2020-12-22 23:49:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:04,204 INFO L93 Difference]: Finished difference Result 2376 states and 3390 transitions. [2020-12-22 23:49:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:49:04,204 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 284 [2020-12-22 23:49:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:04,212 INFO L225 Difference]: With dead ends: 2376 [2020-12-22 23:49:04,212 INFO L226 Difference]: Without dead ends: 2089 [2020-12-22 23:49:04,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 23:49:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2020-12-22 23:49:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 326. [2020-12-22 23:49:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-12-22 23:49:04,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 446 transitions. [2020-12-22 23:49:04,342 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 446 transitions. Word has length 284 [2020-12-22 23:49:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:04,342 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 446 transitions. [2020-12-22 23:49:04,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 23:49:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 446 transitions. [2020-12-22 23:49:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-22 23:49:04,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:04,344 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 18, 18, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:04,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:04,545 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1906238460, now seen corresponding path program 17 times [2020-12-22 23:49:04,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:04,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525215008] [2020-12-22 23:49:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7772 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 7448 trivial. 0 not checked. [2020-12-22 23:49:04,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525215008] [2020-12-22 23:49:04,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227440996] [2020-12-22 23:49:04,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:05,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-22 23:49:05,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 23:49:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7772 backedges. 3641 proven. 136 refuted. 0 times theorem prover too weak. 3995 trivial. 0 not checked. [2020-12-22 23:49:05,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:05,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2020-12-22 23:49:05,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011338383] [2020-12-22 23:49:05,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 23:49:05,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 23:49:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 23:49:05,594 INFO L87 Difference]: Start difference. First operand 326 states and 446 transitions. Second operand 35 states. [2020-12-22 23:49:21,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:21,782 INFO L93 Difference]: Finished difference Result 3197 states and 4518 transitions. [2020-12-22 23:49:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 366 states. [2020-12-22 23:49:21,783 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 286 [2020-12-22 23:49:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:21,793 INFO L225 Difference]: With dead ends: 3197 [2020-12-22 23:49:21,794 INFO L226 Difference]: Without dead ends: 2664 [2020-12-22 23:49:21,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66247 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=23634, Invalid=115868, Unknown=0, NotChecked=0, Total=139502 [2020-12-22 23:49:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2020-12-22 23:49:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 460. [2020-12-22 23:49:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-12-22 23:49:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 606 transitions. [2020-12-22 23:49:22,049 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 606 transitions. Word has length 286 [2020-12-22 23:49:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:22,049 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 606 transitions. [2020-12-22 23:49:22,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 23:49:22,049 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 606 transitions. [2020-12-22 23:49:22,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-12-22 23:49:22,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:22,051 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:22,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:22,252 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:22,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -542207926, now seen corresponding path program 18 times [2020-12-22 23:49:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:22,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683785629] [2020-12-22 23:49:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11002 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10641 trivial. 0 not checked. [2020-12-22 23:49:22,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683785629] [2020-12-22 23:49:22,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344712323] [2020-12-22 23:49:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:23,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-22 23:49:23,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:23,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 23:49:23,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:23,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:23,425 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:23,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:23,460 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11002 backedges. 1503 proven. 51 refuted. 0 times theorem prover too weak. 9448 trivial. 0 not checked. [2020-12-22 23:49:23,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:23,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2020-12-22 23:49:23,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372471134] [2020-12-22 23:49:23,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 23:49:23,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:23,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 23:49:23,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-12-22 23:49:23,571 INFO L87 Difference]: Start difference. First operand 460 states and 606 transitions. Second operand 32 states. [2020-12-22 23:49:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:32,155 INFO L93 Difference]: Finished difference Result 2889 states and 3914 transitions. [2020-12-22 23:49:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2020-12-22 23:49:32,156 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 333 [2020-12-22 23:49:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:32,164 INFO L225 Difference]: With dead ends: 2889 [2020-12-22 23:49:32,165 INFO L226 Difference]: Without dead ends: 2457 [2020-12-22 23:49:32,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15958 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=9499, Invalid=29507, Unknown=0, NotChecked=0, Total=39006 [2020-12-22 23:49:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2020-12-22 23:49:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 525. [2020-12-22 23:49:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2020-12-22 23:49:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 706 transitions. [2020-12-22 23:49:32,368 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 706 transitions. Word has length 333 [2020-12-22 23:49:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:32,369 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 706 transitions. [2020-12-22 23:49:32,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 23:49:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 706 transitions. [2020-12-22 23:49:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-12-22 23:49:32,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:32,372 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 97, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:32,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 23:49:32,588 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:32,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1352181837, now seen corresponding path program 19 times [2020-12-22 23:49:32,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:32,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805520402] [2020-12-22 23:49:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16743 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2020-12-22 23:49:33,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805520402] [2020-12-22 23:49:33,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135168992] [2020-12-22 23:49:33,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 23:49:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16743 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2020-12-22 23:49:33,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:33,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 23:49:33,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073246353] [2020-12-22 23:49:33,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 23:49:33,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:33,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 23:49:33,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:49:33,870 INFO L87 Difference]: Start difference. First operand 525 states and 706 transitions. Second operand 24 states. [2020-12-22 23:49:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:35,651 INFO L93 Difference]: Finished difference Result 3911 states and 5379 transitions. [2020-12-22 23:49:35,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 23:49:35,651 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 398 [2020-12-22 23:49:35,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:35,663 INFO L225 Difference]: With dead ends: 3911 [2020-12-22 23:49:35,663 INFO L226 Difference]: Without dead ends: 3429 [2020-12-22 23:49:35,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 23:49:35,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2020-12-22 23:49:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 527. [2020-12-22 23:49:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-12-22 23:49:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 708 transitions. [2020-12-22 23:49:35,968 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 708 transitions. Word has length 398 [2020-12-22 23:49:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:35,969 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 708 transitions. [2020-12-22 23:49:35,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 23:49:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 708 transitions. [2020-12-22 23:49:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2020-12-22 23:49:35,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:35,972 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 97, 21, 21, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:36,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 23:49:36,188 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:36,189 INFO L82 PathProgramCache]: Analyzing trace with hash 971399477, now seen corresponding path program 20 times [2020-12-22 23:49:36,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:36,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438353901] [2020-12-22 23:49:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16784 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2020-12-22 23:49:36,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438353901] [2020-12-22 23:49:36,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121305854] [2020-12-22 23:49:36,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:37,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:49:37,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:37,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 23:49:37,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16784 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2020-12-22 23:49:37,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:37,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 23:49:37,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078978315] [2020-12-22 23:49:37,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 23:49:37,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:37,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 23:49:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:49:37,490 INFO L87 Difference]: Start difference. First operand 527 states and 708 transitions. Second operand 25 states. [2020-12-22 23:49:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:39,438 INFO L93 Difference]: Finished difference Result 4263 states and 5862 transitions. [2020-12-22 23:49:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 23:49:39,439 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 400 [2020-12-22 23:49:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:39,451 INFO L225 Difference]: With dead ends: 4263 [2020-12-22 23:49:39,451 INFO L226 Difference]: Without dead ends: 3781 [2020-12-22 23:49:39,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 23:49:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2020-12-22 23:49:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 529. [2020-12-22 23:49:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-12-22 23:49:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 710 transitions. [2020-12-22 23:49:39,689 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 710 transitions. Word has length 400 [2020-12-22 23:49:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:39,690 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 710 transitions. [2020-12-22 23:49:39,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 23:49:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 710 transitions. [2020-12-22 23:49:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-12-22 23:49:39,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:39,693 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 97, 22, 22, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:39,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:39,903 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:39,904 INFO L82 PathProgramCache]: Analyzing trace with hash 550048311, now seen corresponding path program 21 times [2020-12-22 23:49:39,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:39,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306420639] [2020-12-22 23:49:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16827 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 16343 trivial. 0 not checked. [2020-12-22 23:49:40,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306420639] [2020-12-22 23:49:40,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222940427] [2020-12-22 23:49:40,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:40,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 23:49:40,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:49:40,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:41,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:41,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:41,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:41,347 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:49:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16827 backedges. 2161 proven. 70 refuted. 0 times theorem prover too weak. 14596 trivial. 0 not checked. [2020-12-22 23:49:41,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:41,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2020-12-22 23:49:41,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095901813] [2020-12-22 23:49:41,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:49:41,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:41,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:49:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=890, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:49:41,437 INFO L87 Difference]: Start difference. First operand 529 states and 710 transitions. Second operand 36 states. [2020-12-22 23:49:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:49:57,110 INFO L93 Difference]: Finished difference Result 3722 states and 5134 transitions. [2020-12-22 23:49:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2020-12-22 23:49:57,110 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 402 [2020-12-22 23:49:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:49:57,122 INFO L225 Difference]: With dead ends: 3722 [2020-12-22 23:49:57,122 INFO L226 Difference]: Without dead ends: 3225 [2020-12-22 23:49:57,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33054 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=17582, Invalid=58318, Unknown=0, NotChecked=0, Total=75900 [2020-12-22 23:49:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2020-12-22 23:49:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 669. [2020-12-22 23:49:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-12-22 23:49:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 915 transitions. [2020-12-22 23:49:57,511 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 915 transitions. Word has length 402 [2020-12-22 23:49:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:49:57,511 INFO L481 AbstractCegarLoop]: Abstraction has 669 states and 915 transitions. [2020-12-22 23:49:57,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:49:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 915 transitions. [2020-12-22 23:49:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-12-22 23:49:57,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:49:57,514 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 127, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:49:57,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 23:49:57,715 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:49:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:49:57,716 INFO L82 PathProgramCache]: Analyzing trace with hash 390525890, now seen corresponding path program 22 times [2020-12-22 23:49:57,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:49:57,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145872926] [2020-12-22 23:49:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:49:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:49:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 28041 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 27512 trivial. 0 not checked. [2020-12-22 23:49:58,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145872926] [2020-12-22 23:49:58,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539974099] [2020-12-22 23:49:58,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:49:58,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:49:58,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:49:58,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 23:49:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:49:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 28041 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 27512 trivial. 0 not checked. [2020-12-22 23:49:59,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:49:59,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 23:49:59,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072126897] [2020-12-22 23:49:59,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 23:49:59,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:49:59,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 23:49:59,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:49:59,465 INFO L87 Difference]: Start difference. First operand 669 states and 915 transitions. Second operand 27 states. [2020-12-22 23:50:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:02,697 INFO L93 Difference]: Finished difference Result 5398 states and 7569 transitions. [2020-12-22 23:50:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 23:50:02,698 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 503 [2020-12-22 23:50:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:02,713 INFO L225 Difference]: With dead ends: 5398 [2020-12-22 23:50:02,713 INFO L226 Difference]: Without dead ends: 4778 [2020-12-22 23:50:02,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 23:50:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4778 states. [2020-12-22 23:50:03,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4778 to 671. [2020-12-22 23:50:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2020-12-22 23:50:03,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 917 transitions. [2020-12-22 23:50:03,053 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 917 transitions. Word has length 503 [2020-12-22 23:50:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:03,053 INFO L481 AbstractCegarLoop]: Abstraction has 671 states and 917 transitions. [2020-12-22 23:50:03,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 23:50:03,054 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 917 transitions. [2020-12-22 23:50:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-12-22 23:50:03,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:03,058 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 127, 24, 24, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:03,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:03,265 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:03,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:03,266 INFO L82 PathProgramCache]: Analyzing trace with hash 59118720, now seen corresponding path program 23 times [2020-12-22 23:50:03,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:03,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102248542] [2020-12-22 23:50:03,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 28088 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 27512 trivial. 0 not checked. [2020-12-22 23:50:04,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102248542] [2020-12-22 23:50:04,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929083533] [2020-12-22 23:50:04,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:04,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 23:50:04,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:04,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 23:50:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 28088 backedges. 9449 proven. 343 refuted. 0 times theorem prover too weak. 18296 trivial. 0 not checked. [2020-12-22 23:50:05,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:05,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 47 [2020-12-22 23:50:05,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211293302] [2020-12-22 23:50:05,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 23:50:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 23:50:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1706, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 23:50:05,391 INFO L87 Difference]: Start difference. First operand 671 states and 917 transitions. Second operand 47 states. [2020-12-22 23:50:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:45,575 INFO L93 Difference]: Finished difference Result 6772 states and 9423 transitions. [2020-12-22 23:50:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 636 states. [2020-12-22 23:50:45,576 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 505 [2020-12-22 23:50:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:45,589 INFO L225 Difference]: With dead ends: 6772 [2020-12-22 23:50:45,589 INFO L226 Difference]: Without dead ends: 5801 [2020-12-22 23:50:45,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1460 GetRequests, 814 SyntacticMatches, 1 SemanticMatches, 645 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206133 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=64089, Invalid=353873, Unknown=0, NotChecked=0, Total=417962 [2020-12-22 23:50:45,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2020-12-22 23:50:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 886. [2020-12-22 23:50:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-12-22 23:50:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1183 transitions. [2020-12-22 23:50:46,159 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1183 transitions. Word has length 505 [2020-12-22 23:50:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:50:46,159 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 1183 transitions. [2020-12-22 23:50:46,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 23:50:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1183 transitions. [2020-12-22 23:50:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 562 [2020-12-22 23:50:46,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:50:46,169 INFO L422 BasicCegarLoop]: trace histogram [143, 143, 143, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:50:46,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 23:50:46,378 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:50:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:50:46,379 INFO L82 PathProgramCache]: Analyzing trace with hash -354836150, now seen corresponding path program 24 times [2020-12-22 23:50:46,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:50:46,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171747467] [2020-12-22 23:50:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:50:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:50:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 35368 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 34743 trivial. 0 not checked. [2020-12-22 23:50:47,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171747467] [2020-12-22 23:50:47,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192091489] [2020-12-22 23:50:47,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:50:47,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-22 23:50:47,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:50:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:50:47,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:50:47,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:50:47,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:50:47,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:50:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 35368 backedges. 6405 proven. 11 refuted. 0 times theorem prover too weak. 28952 trivial. 0 not checked. [2020-12-22 23:50:48,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:50:48,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2020-12-22 23:50:48,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074948643] [2020-12-22 23:50:48,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 23:50:48,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:50:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 23:50:48,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 23:50:48,506 INFO L87 Difference]: Start difference. First operand 886 states and 1183 transitions. Second operand 36 states. [2020-12-22 23:50:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:50:59,756 INFO L93 Difference]: Finished difference Result 10354 states and 13961 transitions. [2020-12-22 23:50:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-12-22 23:50:59,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 561 [2020-12-22 23:50:59,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:50:59,773 INFO L225 Difference]: With dead ends: 10354 [2020-12-22 23:50:59,773 INFO L226 Difference]: Without dead ends: 9521 [2020-12-22 23:50:59,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4109 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3338, Invalid=11424, Unknown=0, NotChecked=0, Total=14762 [2020-12-22 23:50:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9521 states. [2020-12-22 23:51:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9521 to 873. [2020-12-22 23:51:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-12-22 23:51:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1157 transitions. [2020-12-22 23:51:00,591 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1157 transitions. Word has length 561 [2020-12-22 23:51:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:00,591 INFO L481 AbstractCegarLoop]: Abstraction has 873 states and 1157 transitions. [2020-12-22 23:51:00,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 23:51:00,592 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1157 transitions. [2020-12-22 23:51:00,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2020-12-22 23:51:00,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:00,599 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 144, 26, 26, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:00,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 23:51:00,813 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1128630262, now seen corresponding path program 25 times [2020-12-22 23:51:00,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:00,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682420075] [2020-12-22 23:51:00,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 35872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2020-12-22 23:51:01,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682420075] [2020-12-22 23:51:01,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784065592] [2020-12-22 23:51:01,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:02,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 23:51:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 35872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2020-12-22 23:51:03,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:03,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 23:51:03,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749589486] [2020-12-22 23:51:03,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 23:51:03,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:03,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 23:51:03,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:51:03,097 INFO L87 Difference]: Start difference. First operand 873 states and 1157 transitions. Second operand 30 states. [2020-12-22 23:51:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:07,702 INFO L93 Difference]: Finished difference Result 6651 states and 8930 transitions. [2020-12-22 23:51:07,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 23:51:07,703 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 566 [2020-12-22 23:51:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:07,712 INFO L225 Difference]: With dead ends: 6651 [2020-12-22 23:51:07,712 INFO L226 Difference]: Without dead ends: 5833 [2020-12-22 23:51:07,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 23:51:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2020-12-22 23:51:08,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 875. [2020-12-22 23:51:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 875 states. [2020-12-22 23:51:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1159 transitions. [2020-12-22 23:51:08,330 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1159 transitions. Word has length 566 [2020-12-22 23:51:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:08,330 INFO L481 AbstractCegarLoop]: Abstraction has 875 states and 1159 transitions. [2020-12-22 23:51:08,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 23:51:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1159 transitions. [2020-12-22 23:51:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2020-12-22 23:51:08,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:08,335 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 144, 27, 27, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:08,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 23:51:08,546 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:08,547 INFO L82 PathProgramCache]: Analyzing trace with hash 823670668, now seen corresponding path program 26 times [2020-12-22 23:51:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:08,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382362625] [2020-12-22 23:51:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 35925 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2020-12-22 23:51:09,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382362625] [2020-12-22 23:51:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313517736] [2020-12-22 23:51:09,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:10,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:51:10,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 23:51:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35925 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2020-12-22 23:51:10,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:10,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 23:51:10,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53753456] [2020-12-22 23:51:10,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 23:51:10,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:10,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 23:51:10,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:51:10,750 INFO L87 Difference]: Start difference. First operand 875 states and 1159 transitions. Second operand 31 states. [2020-12-22 23:51:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:15,723 INFO L93 Difference]: Finished difference Result 7138 states and 9581 transitions. [2020-12-22 23:51:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 23:51:15,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 568 [2020-12-22 23:51:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:15,735 INFO L225 Difference]: With dead ends: 7138 [2020-12-22 23:51:15,736 INFO L226 Difference]: Without dead ends: 6320 [2020-12-22 23:51:15,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 23:51:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6320 states. [2020-12-22 23:51:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6320 to 877. [2020-12-22 23:51:16,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 877 states. [2020-12-22 23:51:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1161 transitions. [2020-12-22 23:51:16,461 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1161 transitions. Word has length 568 [2020-12-22 23:51:16,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:16,462 INFO L481 AbstractCegarLoop]: Abstraction has 877 states and 1161 transitions. [2020-12-22 23:51:16,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 23:51:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1161 transitions. [2020-12-22 23:51:16,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2020-12-22 23:51:16,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:16,466 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 144, 28, 28, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:16,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:16,680 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:16,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 84156046, now seen corresponding path program 27 times [2020-12-22 23:51:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:16,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329549419] [2020-12-22 23:51:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 35980 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2020-12-22 23:51:17,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329549419] [2020-12-22 23:51:17,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570851617] [2020-12-22 23:51:17,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:18,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 23:51:18,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 23:51:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:18,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:51:18,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:51:18,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:51:18,984 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 23:51:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 35980 backedges. 4057 proven. 117 refuted. 0 times theorem prover too weak. 31806 trivial. 0 not checked. [2020-12-22 23:51:19,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:19,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2020-12-22 23:51:19,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118657742] [2020-12-22 23:51:19,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 23:51:19,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 23:51:19,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=1332, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 23:51:19,186 INFO L87 Difference]: Start difference. First operand 877 states and 1161 transitions. Second operand 44 states. [2020-12-22 23:51:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:51:50,559 INFO L93 Difference]: Finished difference Result 5939 states and 8013 transitions. [2020-12-22 23:51:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 359 states. [2020-12-22 23:51:50,559 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 570 [2020-12-22 23:51:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:51:50,565 INFO L225 Difference]: With dead ends: 5939 [2020-12-22 23:51:50,565 INFO L226 Difference]: Without dead ends: 5102 [2020-12-22 23:51:50,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1151 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56526 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=31637, Invalid=97603, Unknown=0, NotChecked=0, Total=129240 [2020-12-22 23:51:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2020-12-22 23:51:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 1059. [2020-12-22 23:51:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1059 states. [2020-12-22 23:51:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1423 transitions. [2020-12-22 23:51:51,509 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1423 transitions. Word has length 570 [2020-12-22 23:51:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:51:51,509 INFO L481 AbstractCegarLoop]: Abstraction has 1059 states and 1423 transitions. [2020-12-22 23:51:51,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 23:51:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1423 transitions. [2020-12-22 23:51:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2020-12-22 23:51:51,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:51:51,517 INFO L422 BasicCegarLoop]: trace histogram [200, 200, 200, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:51:51,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 23:51:51,731 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:51:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:51:51,732 INFO L82 PathProgramCache]: Analyzing trace with hash -764166126, now seen corresponding path program 28 times [2020-12-22 23:51:51,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:51:51,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381657887] [2020-12-22 23:51:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:51:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:51:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 67303 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 66462 trivial. 0 not checked. [2020-12-22 23:51:53,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381657887] [2020-12-22 23:51:53,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224930396] [2020-12-22 23:51:53,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:51:53,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:51:53,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:51:53,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 23:51:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:51:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 67303 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 66462 trivial. 0 not checked. [2020-12-22 23:51:54,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:51:54,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 23:51:54,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693436816] [2020-12-22 23:51:54,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 23:51:54,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:51:54,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 23:51:54,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:51:54,760 INFO L87 Difference]: Start difference. First operand 1059 states and 1423 transitions. Second operand 33 states. [2020-12-22 23:52:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:52:06,433 INFO L93 Difference]: Finished difference Result 10080 states and 13761 transitions. [2020-12-22 23:52:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 23:52:06,434 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 752 [2020-12-22 23:52:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:52:06,440 INFO L225 Difference]: With dead ends: 10080 [2020-12-22 23:52:06,440 INFO L226 Difference]: Without dead ends: 9082 [2020-12-22 23:52:06,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 23:52:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9082 states. [2020-12-22 23:52:07,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9082 to 1061. [2020-12-22 23:52:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1061 states. [2020-12-22 23:52:07,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1425 transitions. [2020-12-22 23:52:07,366 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1425 transitions. Word has length 752 [2020-12-22 23:52:07,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:52:07,366 INFO L481 AbstractCegarLoop]: Abstraction has 1061 states and 1425 transitions. [2020-12-22 23:52:07,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 23:52:07,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1425 transitions. [2020-12-22 23:52:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2020-12-22 23:52:07,375 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:52:07,376 INFO L422 BasicCegarLoop]: trace histogram [200, 200, 200, 30, 30, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:52:07,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:07,577 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:52:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:52:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 664049940, now seen corresponding path program 29 times [2020-12-22 23:52:07,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:52:07,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667222601] [2020-12-22 23:52:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:52:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:52:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 67362 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 66462 trivial. 0 not checked. [2020-12-22 23:52:08,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667222601] [2020-12-22 23:52:08,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701256599] [2020-12-22 23:52:08,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:52:09,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 23:52:09,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:52:09,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 23:52:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:52:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 67362 backedges. 19395 proven. 518 refuted. 0 times theorem prover too weak. 47449 trivial. 0 not checked. [2020-12-22 23:52:11,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:52:11,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 26] total 57 [2020-12-22 23:52:11,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204406906] [2020-12-22 23:52:11,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 23:52:11,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:52:11,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 23:52:11,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=2515, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 23:52:11,113 INFO L87 Difference]: Start difference. First operand 1061 states and 1425 transitions. Second operand 57 states.