/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:52:31,622 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:52:31,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:52:31,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:52:31,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:52:31,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:52:31,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:52:31,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:52:31,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:52:31,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:52:31,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:52:31,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:52:31,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:52:31,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:52:31,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:52:31,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:52:31,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:52:31,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:52:31,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:52:31,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:52:31,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:52:31,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:52:31,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:52:31,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:52:31,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:52:31,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:52:31,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:52:31,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:52:31,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:52:31,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:52:31,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:52:31,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:52:31,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:52:31,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:52:31,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:52:31,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:52:31,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:52:31,821 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:52:31,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:52:31,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:52:31,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:52:31,826 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:52:31,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:52:31,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:52:31,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:52:31,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:52:31,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:52:31,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:52:31,829 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:52:31,829 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:52:31,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:52:31,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:52:31,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:52:31,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:52:31,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:52:31,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:52:31,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:52:31,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:52:31,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:52:31,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:52:31,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:52:31,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:52:31,833 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:52:32,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:52:32,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:52:32,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:52:32,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:52:32,320 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:52:32,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2020-12-23 06:52:32,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/73d7293d8/b926d3a385b4401d807178465aa8ea7f/FLAG4328184ed [2020-12-23 06:52:33,015 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:52:33,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2020-12-23 06:52:33,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/73d7293d8/b926d3a385b4401d807178465aa8ea7f/FLAG4328184ed [2020-12-23 06:52:33,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/73d7293d8/b926d3a385b4401d807178465aa8ea7f [2020-12-23 06:52:33,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:52:33,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:52:33,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:33,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:52:33,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:52:33,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728fbc9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33, skipping insertion in model container [2020-12-23 06:52:33,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:52:33,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:52:33,631 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] left hand side expression in assignment: lhs: VariableLHS[~index~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~array~0,],[BinaryExpression[ARITHMOD,IdentifierExpression[~index~0,],IntegerLiteral[4294967296]]]] left hand side expression in assignment: lhs: VariableLHS[~index~0,] [2020-12-23 06:52:33,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:33,657 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:52:33,670 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] left hand side expression in assignment: lhs: VariableLHS[~index~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#array~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#array~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHMOD,IdentifierExpression[~index~0,],IntegerLiteral[4294967296]]]]]] left hand side expression in assignment: lhs: VariableLHS[~index~0,] [2020-12-23 06:52:33,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:52:33,699 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:52:33,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33 WrapperNode [2020-12-23 06:52:33,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:52:33,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:33,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:52:33,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:52:33,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:52:33,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:52:33,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:52:33,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:52:33,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (1/1) ... [2020-12-23 06:52:33,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:52:33,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:52:33,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:52:33,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:52:33,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (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 [2020-12-23 06:52:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:52:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:52:33,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:52:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:52:33,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:52:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:52:33,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:52:34,178 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:52:34,179 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 06:52:34,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:34 BoogieIcfgContainer [2020-12-23 06:52:34,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:52:34,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:52:34,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:52:34,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:52:34,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:52:33" (1/3) ... [2020-12-23 06:52:34,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b02a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:34, skipping insertion in model container [2020-12-23 06:52:34,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:52:33" (2/3) ... [2020-12-23 06:52:34,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b02a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:52:34, skipping insertion in model container [2020-12-23 06:52:34,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:52:34" (3/3) ... [2020-12-23 06:52:34,189 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2020-12-23 06:52:34,196 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:52:34,200 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 06:52:34,220 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 06:52:34,248 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:52:34,248 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:52:34,248 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:52:34,248 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:52:34,248 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:52:34,249 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:52:34,249 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:52:34,249 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:52:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-23 06:52:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:52:34,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:34,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:34,275 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash 212117245, now seen corresponding path program 1 times [2020-12-23 06:52:34,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:34,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760028812] [2020-12-23 06:52:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:34,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760028812] [2020-12-23 06:52:34,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:52:34,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:52:34,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499220796] [2020-12-23 06:52:34,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:52:34,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:52:34,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:52:34,558 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-12-23 06:52:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:34,615 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2020-12-23 06:52:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:52:34,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 06:52:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:34,626 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:52:34,626 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 06:52:34,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:52:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 06:52:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-12-23 06:52:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:52:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-23 06:52:34,667 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2020-12-23 06:52:34,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:34,667 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-23 06:52:34,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:52:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-23 06:52:34,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:52:34,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:34,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:34,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:52:34,669 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1436002194, now seen corresponding path program 1 times [2020-12-23 06:52:34,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:34,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768483539] [2020-12-23 06:52:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:34,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768483539] [2020-12-23 06:52:34,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234388318] [2020-12-23 06:52:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:34,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:52:34,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:34,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:34,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:52:34,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860129146] [2020-12-23 06:52:34,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:52:34,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:34,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:52:34,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:52:34,865 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-12-23 06:52:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:34,926 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-12-23 06:52:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:52:34,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 06:52:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:34,928 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:52:34,928 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:52:34,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:52:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:52:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2020-12-23 06:52:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 06:52:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 06:52:34,936 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2020-12-23 06:52:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:34,937 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 06:52:34,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:52:34,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 06:52:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:52:34,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:34,938 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:35,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:52:35,153 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 780804628, now seen corresponding path program 2 times [2020-12-23 06:52:35,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:35,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397722113] [2020-12-23 06:52:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:35,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397722113] [2020-12-23 06:52:35,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179381617] [2020-12-23 06:52:35,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:35,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:35,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:52:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:35,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:35,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:52:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468319941] [2020-12-23 06:52:35,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:52:35,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:35,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:52:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:52:35,406 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-12-23 06:52:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:35,480 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-12-23 06:52:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:52:35,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 06:52:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:35,482 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:52:35,482 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 06:52:35,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:52:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 06:52:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-12-23 06:52:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:52:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 06:52:35,491 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 12 [2020-12-23 06:52:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:35,491 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 06:52:35,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:52:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 06:52:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:52:35,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:35,492 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:35,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:35,709 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:35,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:35,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1798831082, now seen corresponding path program 3 times [2020-12-23 06:52:35,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:35,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945718223] [2020-12-23 06:52:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:35,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945718223] [2020-12-23 06:52:35,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334965732] [2020-12-23 06:52:35,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:35,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:52:35,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:35,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:52:35,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:35,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:35,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:52:35,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368632798] [2020-12-23 06:52:35,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:52:35,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:35,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:52:35,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:52:35,970 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-12-23 06:52:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:36,074 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2020-12-23 06:52:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:52:36,075 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-23 06:52:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:36,076 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:52:36,076 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:52:36,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:52:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:52:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-12-23 06:52:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 06:52:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-12-23 06:52:36,085 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 14 [2020-12-23 06:52:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:36,085 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-12-23 06:52:36,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:52:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-12-23 06:52:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:52:36,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:36,086 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:36,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:36,300 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1662348696, now seen corresponding path program 4 times [2020-12-23 06:52:36,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:36,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076580820] [2020-12-23 06:52:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:36,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076580820] [2020-12-23 06:52:36,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301747634] [2020-12-23 06:52:36,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:36,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:36,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:36,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:52:36,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:36,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:36,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:52:36,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792110322] [2020-12-23 06:52:36,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:52:36,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:36,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:52:36,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:52:36,542 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-12-23 06:52:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:36,698 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-23 06:52:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:52:36,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 06:52:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:36,699 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:52:36,700 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 06:52:36,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:52:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 06:52:36,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-12-23 06:52:36,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:52:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-12-23 06:52:36,708 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 16 [2020-12-23 06:52:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:36,709 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-12-23 06:52:36,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:52:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-12-23 06:52:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:52:36,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:36,710 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:36,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:36,923 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:36,924 INFO L82 PathProgramCache]: Analyzing trace with hash -743539046, now seen corresponding path program 5 times [2020-12-23 06:52:36,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:36,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703355141] [2020-12-23 06:52:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:37,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703355141] [2020-12-23 06:52:37,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366573220] [2020-12-23 06:52:37,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:37,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:52:37,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:52:37,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:37,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:37,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:52:37,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508188634] [2020-12-23 06:52:37,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:52:37,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:52:37,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:52:37,239 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 9 states. [2020-12-23 06:52:37,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:37,408 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2020-12-23 06:52:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:52:37,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-23 06:52:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:37,415 INFO L225 Difference]: With dead ends: 104 [2020-12-23 06:52:37,416 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:52:37,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:52:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:52:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-12-23 06:52:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 06:52:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-12-23 06:52:37,438 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 18 [2020-12-23 06:52:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:37,439 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-12-23 06:52:37,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:52:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-12-23 06:52:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:52:37,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:37,441 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:37,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:52:37,658 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2109253860, now seen corresponding path program 6 times [2020-12-23 06:52:37,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:37,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297520310] [2020-12-23 06:52:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:37,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297520310] [2020-12-23 06:52:37,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734135635] [2020-12-23 06:52:37,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:37,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:52:37,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:37,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:52:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:38,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:38,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:52:38,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451261464] [2020-12-23 06:52:38,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:52:38,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:38,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:52:38,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:52:38,050 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 10 states. [2020-12-23 06:52:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:38,305 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-12-23 06:52:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:52:38,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 06:52:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:38,307 INFO L225 Difference]: With dead ends: 118 [2020-12-23 06:52:38,307 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 06:52:38,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:52:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 06:52:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2020-12-23 06:52:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:52:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-12-23 06:52:38,336 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 20 [2020-12-23 06:52:38,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:38,336 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-12-23 06:52:38,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:52:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-12-23 06:52:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:52:38,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:38,338 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:38,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:38,541 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:38,542 INFO L82 PathProgramCache]: Analyzing trace with hash -301197538, now seen corresponding path program 7 times [2020-12-23 06:52:38,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:38,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453197899] [2020-12-23 06:52:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:38,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453197899] [2020-12-23 06:52:38,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698655240] [2020-12-23 06:52:38,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:38,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:52:38,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:38,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:38,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:52:38,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799813213] [2020-12-23 06:52:38,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:52:38,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:38,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:52:38,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:52:38,864 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 11 states. [2020-12-23 06:52:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:39,132 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2020-12-23 06:52:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:52:39,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-12-23 06:52:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:39,133 INFO L225 Difference]: With dead ends: 132 [2020-12-23 06:52:39,133 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 06:52:39,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:52:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 06:52:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2020-12-23 06:52:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 06:52:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-12-23 06:52:39,139 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 22 [2020-12-23 06:52:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:39,140 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-12-23 06:52:39,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:52:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-12-23 06:52:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:52:39,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:39,141 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:39,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:39,352 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:39,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:39,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2074140320, now seen corresponding path program 8 times [2020-12-23 06:52:39,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:39,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774749126] [2020-12-23 06:52:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:39,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774749126] [2020-12-23 06:52:39,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112063585] [2020-12-23 06:52:39,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:39,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:39,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:39,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:52:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:39,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:39,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:52:39,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110932304] [2020-12-23 06:52:39,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:52:39,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:39,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:52:39,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:52:39,666 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 12 states. [2020-12-23 06:52:40,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:40,025 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-12-23 06:52:40,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:52:40,026 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-12-23 06:52:40,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:40,027 INFO L225 Difference]: With dead ends: 146 [2020-12-23 06:52:40,027 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 06:52:40,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:52:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 06:52:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2020-12-23 06:52:40,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 06:52:40,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-12-23 06:52:40,035 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 24 [2020-12-23 06:52:40,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:40,035 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-12-23 06:52:40,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:52:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-12-23 06:52:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:52:40,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:40,036 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:40,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:52:40,252 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:40,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash -148779614, now seen corresponding path program 9 times [2020-12-23 06:52:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:40,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516113673] [2020-12-23 06:52:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:40,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516113673] [2020-12-23 06:52:40,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224542974] [2020-12-23 06:52:40,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:41,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:52:41,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:41,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:52:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:41,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:41,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:52:41,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543794161] [2020-12-23 06:52:41,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:52:41,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:52:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:52:41,151 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 13 states. [2020-12-23 06:52:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:41,523 INFO L93 Difference]: Finished difference Result 160 states and 173 transitions. [2020-12-23 06:52:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:52:41,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-12-23 06:52:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:41,525 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:52:41,525 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 06:52:41,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:52:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 06:52:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2020-12-23 06:52:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 06:52:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-12-23 06:52:41,532 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 26 [2020-12-23 06:52:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:41,533 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-12-23 06:52:41,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:52:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-12-23 06:52:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:52:41,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:41,534 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:41,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:41,737 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1776090076, now seen corresponding path program 10 times [2020-12-23 06:52:41,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:41,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602429815] [2020-12-23 06:52:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:41,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602429815] [2020-12-23 06:52:41,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133968030] [2020-12-23 06:52:41,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:42,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:52:42,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:52:42,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:42,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:42,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:52:42,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181374227] [2020-12-23 06:52:42,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:52:42,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:42,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:52:42,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:52:42,194 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2020-12-23 06:52:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:42,638 INFO L93 Difference]: Finished difference Result 174 states and 188 transitions. [2020-12-23 06:52:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:52:42,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-12-23 06:52:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:42,640 INFO L225 Difference]: With dead ends: 174 [2020-12-23 06:52:42,640 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 06:52:42,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:52:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 06:52:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2020-12-23 06:52:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 06:52:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-12-23 06:52:42,647 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 28 [2020-12-23 06:52:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:42,647 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-12-23 06:52:42,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:52:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-12-23 06:52:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:52:42,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:42,648 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:42,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:42,862 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2041618982, now seen corresponding path program 11 times [2020-12-23 06:52:42,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:42,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989355678] [2020-12-23 06:52:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:43,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989355678] [2020-12-23 06:52:43,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336404930] [2020-12-23 06:52:43,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:46,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:52:46,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:46,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:52:46,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:46,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:46,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:52:46,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872603524] [2020-12-23 06:52:46,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:52:46,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:46,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:52:46,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:52:46,124 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 15 states. [2020-12-23 06:52:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:46,647 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2020-12-23 06:52:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:52:46,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-23 06:52:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:46,649 INFO L225 Difference]: With dead ends: 188 [2020-12-23 06:52:46,649 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 06:52:46,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:52:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 06:52:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-12-23 06:52:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 06:52:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 109 transitions. [2020-12-23 06:52:46,656 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 109 transitions. Word has length 30 [2020-12-23 06:52:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:46,656 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 109 transitions. [2020-12-23 06:52:46,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:52:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 109 transitions. [2020-12-23 06:52:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:52:46,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:46,657 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:46,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:52:46,862 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1337014360, now seen corresponding path program 12 times [2020-12-23 06:52:46,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:46,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77660265] [2020-12-23 06:52:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77660265] [2020-12-23 06:52:47,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940527350] [2020-12-23 06:52:47,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:51,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:52:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:51,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:52:51,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:51,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:51,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:52:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884585141] [2020-12-23 06:52:51,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:52:51,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:52:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:52:51,611 INFO L87 Difference]: Start difference. First operand 96 states and 109 transitions. Second operand 16 states. [2020-12-23 06:52:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:52,251 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2020-12-23 06:52:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:52:52,253 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-12-23 06:52:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:52,257 INFO L225 Difference]: With dead ends: 202 [2020-12-23 06:52:52,257 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 06:52:52,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:52:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 06:52:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-12-23 06:52:52,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 06:52:52,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2020-12-23 06:52:52,265 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 32 [2020-12-23 06:52:52,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:52,265 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2020-12-23 06:52:52,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:52:52,265 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2020-12-23 06:52:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:52:52,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:52,269 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:52,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:52:52,478 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:52,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1208380246, now seen corresponding path program 13 times [2020-12-23 06:52:52,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:52,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767410872] [2020-12-23 06:52:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:52,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767410872] [2020-12-23 06:52:52,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598493476] [2020-12-23 06:52:52,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:52,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:52:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:53,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:53,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:52:53,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855694828] [2020-12-23 06:52:53,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:52:53,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:53,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:52:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:52:53,052 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand 17 states. [2020-12-23 06:52:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:53,737 INFO L93 Difference]: Finished difference Result 216 states and 233 transitions. [2020-12-23 06:52:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:52:53,738 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-12-23 06:52:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:53,739 INFO L225 Difference]: With dead ends: 216 [2020-12-23 06:52:53,739 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 06:52:53,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:52:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 06:52:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-12-23 06:52:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 06:52:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2020-12-23 06:52:53,746 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 34 [2020-12-23 06:52:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:53,746 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2020-12-23 06:52:53,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:52:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2020-12-23 06:52:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:52:53,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:53,748 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:53,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:52:53,962 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:53,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:53,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2145048276, now seen corresponding path program 14 times [2020-12-23 06:52:53,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:53,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041694545] [2020-12-23 06:52:53,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:54,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041694545] [2020-12-23 06:52:54,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324872088] [2020-12-23 06:52:54,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:54,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:52:54,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:52:54,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:52:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:52:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:54,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:52:54,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:52:54,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521510297] [2020-12-23 06:52:54,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:52:54,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:52:54,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:52:54,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:52:54,482 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand 18 states. [2020-12-23 06:52:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:52:55,253 INFO L93 Difference]: Finished difference Result 230 states and 248 transitions. [2020-12-23 06:52:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:52:55,254 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-12-23 06:52:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:52:55,255 INFO L225 Difference]: With dead ends: 230 [2020-12-23 06:52:55,255 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 06:52:55,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:52:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 06:52:55,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2020-12-23 06:52:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 06:52:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2020-12-23 06:52:55,262 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 36 [2020-12-23 06:52:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:52:55,262 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2020-12-23 06:52:55,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:52:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2020-12-23 06:52:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:52:55,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:52:55,264 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:52:55,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:52:55,479 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:52:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:52:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash -339892946, now seen corresponding path program 15 times [2020-12-23 06:52:55,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:52:55,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539514853] [2020-12-23 06:52:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:52:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:52:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:52:55,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539514853] [2020-12-23 06:52:55,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464764881] [2020-12-23 06:52:55,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:00,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:53:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:53:00,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:00,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:00,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:53:00,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371707527] [2020-12-23 06:53:00,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:53:00,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:00,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:53:00,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:53:00,484 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand 19 states. [2020-12-23 06:53:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:01,383 INFO L93 Difference]: Finished difference Result 244 states and 263 transitions. [2020-12-23 06:53:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:53:01,384 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-12-23 06:53:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:01,385 INFO L225 Difference]: With dead ends: 244 [2020-12-23 06:53:01,386 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 06:53:01,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:53:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 06:53:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2020-12-23 06:53:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 06:53:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2020-12-23 06:53:01,392 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 38 [2020-12-23 06:53:01,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:01,392 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2020-12-23 06:53:01,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:53:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2020-12-23 06:53:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:53:01,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:01,393 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:01,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:53:01,598 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:01,599 INFO L82 PathProgramCache]: Analyzing trace with hash -752408400, now seen corresponding path program 16 times [2020-12-23 06:53:01,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:01,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421673565] [2020-12-23 06:53:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:01,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421673565] [2020-12-23 06:53:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567060374] [2020-12-23 06:53:01,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:02,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:53:02,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:53:02,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:02,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:02,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:53:02,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592749655] [2020-12-23 06:53:02,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:53:02,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:02,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:53:02,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:53:02,293 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand 20 states. [2020-12-23 06:53:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:03,431 INFO L93 Difference]: Finished difference Result 258 states and 278 transitions. [2020-12-23 06:53:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:53:03,431 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-12-23 06:53:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:03,432 INFO L225 Difference]: With dead ends: 258 [2020-12-23 06:53:03,433 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 06:53:03,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 15 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:53:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 06:53:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 131. [2020-12-23 06:53:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 06:53:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-12-23 06:53:03,443 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 40 [2020-12-23 06:53:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:03,443 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-12-23 06:53:03,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:53:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-12-23 06:53:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:53:03,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:03,444 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:03,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:53:03,659 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:03,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:03,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2042768462, now seen corresponding path program 17 times [2020-12-23 06:53:03,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:03,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647809560] [2020-12-23 06:53:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:04,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647809560] [2020-12-23 06:53:04,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620166724] [2020-12-23 06:53:04,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:53:31,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:53:31,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:53:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:53:31,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:53:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:31,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:53:31,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:53:31,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606791220] [2020-12-23 06:53:31,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:53:31,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:53:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:53:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:53:31,950 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 21 states. [2020-12-23 06:53:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:53:33,211 INFO L93 Difference]: Finished difference Result 272 states and 293 transitions. [2020-12-23 06:53:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:53:33,212 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-12-23 06:53:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:53:33,215 INFO L225 Difference]: With dead ends: 272 [2020-12-23 06:53:33,215 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 06:53:33,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:53:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 06:53:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 138. [2020-12-23 06:53:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 06:53:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 157 transitions. [2020-12-23 06:53:33,224 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 157 transitions. Word has length 42 [2020-12-23 06:53:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:53:33,225 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 157 transitions. [2020-12-23 06:53:33,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:53:33,225 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 157 transitions. [2020-12-23 06:53:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:53:33,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:53:33,229 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:53:33,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:53:33,436 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:53:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:53:33,436 INFO L82 PathProgramCache]: Analyzing trace with hash -833239500, now seen corresponding path program 18 times [2020-12-23 06:53:33,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:53:33,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187115357] [2020-12-23 06:53:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:53:33,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:53:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:53:33,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187115357] [2020-12-23 06:53:33,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524855026] [2020-12-23 06:53:33,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:26,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:54:26,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:26,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:54:26,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:26,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:26,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:54:26,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144499832] [2020-12-23 06:54:26,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:54:26,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:26,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:54:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:54:26,196 INFO L87 Difference]: Start difference. First operand 138 states and 157 transitions. Second operand 22 states. [2020-12-23 06:54:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:27,575 INFO L93 Difference]: Finished difference Result 286 states and 308 transitions. [2020-12-23 06:54:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:54:27,576 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-12-23 06:54:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:27,577 INFO L225 Difference]: With dead ends: 286 [2020-12-23 06:54:27,577 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 06:54:27,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:54:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 06:54:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-12-23 06:54:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 06:54:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 165 transitions. [2020-12-23 06:54:27,584 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 165 transitions. Word has length 44 [2020-12-23 06:54:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:27,584 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 165 transitions. [2020-12-23 06:54:27,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:54:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 165 transitions. [2020-12-23 06:54:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:54:27,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:27,585 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:27,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:27,786 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:27,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1882923062, now seen corresponding path program 19 times [2020-12-23 06:54:27,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:27,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759846317] [2020-12-23 06:54:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:28,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759846317] [2020-12-23 06:54:28,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256633944] [2020-12-23 06:54:28,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:28,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:54:28,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:28,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:28,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:54:28,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107706098] [2020-12-23 06:54:28,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:54:28,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:28,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:54:28,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:54:28,551 INFO L87 Difference]: Start difference. First operand 145 states and 165 transitions. Second operand 23 states. [2020-12-23 06:54:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:30,075 INFO L93 Difference]: Finished difference Result 300 states and 323 transitions. [2020-12-23 06:54:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:54:30,076 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-12-23 06:54:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:30,077 INFO L225 Difference]: With dead ends: 300 [2020-12-23 06:54:30,078 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 06:54:30,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:54:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 06:54:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 152. [2020-12-23 06:54:30,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 06:54:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 173 transitions. [2020-12-23 06:54:30,085 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 173 transitions. Word has length 46 [2020-12-23 06:54:30,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:30,085 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 173 transitions. [2020-12-23 06:54:30,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:54:30,085 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 173 transitions. [2020-12-23 06:54:30,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:54:30,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:30,086 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:30,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:30,291 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:30,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:30,291 INFO L82 PathProgramCache]: Analyzing trace with hash 775029176, now seen corresponding path program 20 times [2020-12-23 06:54:30,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:30,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773810677] [2020-12-23 06:54:30,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:30,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773810677] [2020-12-23 06:54:30,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155702342] [2020-12-23 06:54:30,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:54:30,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:54:30,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:54:30,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:54:30,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:54:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:31,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:54:31,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:54:31,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437749237] [2020-12-23 06:54:31,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:54:31,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:54:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:54:31,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:54:31,039 INFO L87 Difference]: Start difference. First operand 152 states and 173 transitions. Second operand 24 states. [2020-12-23 06:54:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:54:32,682 INFO L93 Difference]: Finished difference Result 314 states and 338 transitions. [2020-12-23 06:54:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:54:32,683 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-12-23 06:54:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:54:32,684 INFO L225 Difference]: With dead ends: 314 [2020-12-23 06:54:32,684 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 06:54:32,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:54:32,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 06:54:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-12-23 06:54:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 06:54:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2020-12-23 06:54:32,691 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 48 [2020-12-23 06:54:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:54:32,692 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2020-12-23 06:54:32,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:54:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2020-12-23 06:54:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:54:32,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:54:32,693 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:54:32,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:54:32,907 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:54:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:54:32,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1240894138, now seen corresponding path program 21 times [2020-12-23 06:54:32,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:54:32,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464915231] [2020-12-23 06:54:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:54:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:54:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:54:33,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464915231] [2020-12-23 06:54:33,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919958897] [2020-12-23 06:54:33,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:50,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:55:50,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:50,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:55:50,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:51,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:51,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:55:51,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109679950] [2020-12-23 06:55:51,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:55:51,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:51,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:55:51,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:55:51,061 INFO L87 Difference]: Start difference. First operand 159 states and 181 transitions. Second operand 25 states. [2020-12-23 06:55:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:52,966 INFO L93 Difference]: Finished difference Result 328 states and 353 transitions. [2020-12-23 06:55:52,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:55:52,967 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-12-23 06:55:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:52,969 INFO L225 Difference]: With dead ends: 328 [2020-12-23 06:55:52,969 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 06:55:52,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:55:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 06:55:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 166. [2020-12-23 06:55:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 06:55:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 189 transitions. [2020-12-23 06:55:52,977 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 189 transitions. Word has length 50 [2020-12-23 06:55:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:52,977 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 189 transitions. [2020-12-23 06:55:52,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:55:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 189 transitions. [2020-12-23 06:55:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:55:52,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:52,978 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:53,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:55:53,191 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:53,192 INFO L82 PathProgramCache]: Analyzing trace with hash -2034443460, now seen corresponding path program 22 times [2020-12-23 06:55:53,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:53,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868236761] [2020-12-23 06:55:53,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:53,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868236761] [2020-12-23 06:55:53,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474964985] [2020-12-23 06:55:53,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:53,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:55:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:55:53,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:55:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:55:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:54,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:55:54,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:55:54,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529314401] [2020-12-23 06:55:54,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:55:54,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:55:54,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:55:54,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:55:54,395 INFO L87 Difference]: Start difference. First operand 166 states and 189 transitions. Second operand 26 states. [2020-12-23 06:55:56,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:55:56,449 INFO L93 Difference]: Finished difference Result 342 states and 368 transitions. [2020-12-23 06:55:56,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:55:56,450 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-12-23 06:55:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:55:56,451 INFO L225 Difference]: With dead ends: 342 [2020-12-23 06:55:56,451 INFO L226 Difference]: Without dead ends: 223 [2020-12-23 06:55:56,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 22 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:55:56,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-23 06:55:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 173. [2020-12-23 06:55:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 06:55:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 197 transitions. [2020-12-23 06:55:56,460 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 197 transitions. Word has length 52 [2020-12-23 06:55:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:55:56,460 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 197 transitions. [2020-12-23 06:55:56,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:55:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 197 transitions. [2020-12-23 06:55:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:55:56,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:55:56,461 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:55:56,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:55:56,675 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:55:56,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:55:56,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1422847170, now seen corresponding path program 23 times [2020-12-23 06:55:56,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:55:56,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490904047] [2020-12-23 06:55:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:55:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:55:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:55:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490904047] [2020-12-23 06:55:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327110869] [2020-12-23 06:55:57,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true