/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-lopstr16/break-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:04:59,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:04:59,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:04:59,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:04:59,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:04:59,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:04:59,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:04:59,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:04:59,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:04:59,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:04:59,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:04:59,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:04:59,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:04:59,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:04:59,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:04:59,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:04:59,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:04:59,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:05:00,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:05:00,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:05:00,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:05:00,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:05:00,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:05:00,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:05:00,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:05:00,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:05:00,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:05:00,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:05:00,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:05:00,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:05:00,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:05:00,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:05:00,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:05:00,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:05:00,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:05:00,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:05:00,049 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:05:00,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:05:00,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:05:00,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:05:00,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:05:00,110 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:05:00,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:05:00,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:05:00,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:05:00,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:05:00,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:05:00,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:05:00,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:05:00,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:05:00,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:05:00,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:05:00,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:05:00,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:05:00,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:05:00,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:05:00,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:05:00,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:05:00,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:05:00,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:05:00,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:05:00,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:05:00,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:05:00,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:05:00,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:05:00,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:05:00,564 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:05:00,564 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:05:00,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/break-1.i [2021-01-06 11:05:00,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79e764f31/dbb6972b0db14411977f82886742ded0/FLAG5ec7d4916 [2021-01-06 11:05:01,273 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:05:01,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-1.i [2021-01-06 11:05:01,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79e764f31/dbb6972b0db14411977f82886742ded0/FLAG5ec7d4916 [2021-01-06 11:05:01,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/79e764f31/dbb6972b0db14411977f82886742ded0 [2021-01-06 11:05:01,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:05:01,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:05:01,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:05:01,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:05:01,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:05:01,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:05:01" (1/1) ... [2021-01-06 11:05:01,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd7f987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:01, skipping insertion in model container [2021-01-06 11:05:01,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:05:01" (1/1) ... [2021-01-06 11:05:01,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:05:01,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:05:01,911 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-1.i[800,813] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: StructLHS[ArrayLHS[VariableLHS[~s~0,GLOBAL],[IdentifierExpression[~i~0,]]],n] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:05:01,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:05:11,440 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:05:11,453 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/break-1.i[800,813] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#s~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#s~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:05:11,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:05:11,488 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:05:11,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11 WrapperNode [2021-01-06 11:05:11,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:05:11,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:05:11,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:05:11,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:05:11,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,534 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:05:11,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:05:11,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:05:11,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:05:11,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... [2021-01-06 11:05:11,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:05:11,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:05:11,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:05:11,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:05:11,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:05:11,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 11:05:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:05:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-01-06 11:05:11,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:05:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:05:11,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:05:11,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:05:12,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:05:12,132 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 11:05:12,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:05:12 BoogieIcfgContainer [2021-01-06 11:05:12,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:05:12,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:05:12,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:05:12,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:05:12,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:05:01" (1/3) ... [2021-01-06 11:05:12,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5d680e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:05:12, skipping insertion in model container [2021-01-06 11:05:12,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:11" (2/3) ... [2021-01-06 11:05:12,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5d680e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:05:12, skipping insertion in model container [2021-01-06 11:05:12,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:05:12" (3/3) ... [2021-01-06 11:05:12,145 INFO L111 eAbstractionObserver]: Analyzing ICFG break-1.i [2021-01-06 11:05:12,154 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:05:12,162 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:05:12,191 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:05:12,240 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:05:12,240 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:05:12,240 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:05:12,241 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:05:12,241 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:05:12,241 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:05:12,241 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:05:12,241 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:05:12,259 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 11:05:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 11:05:12,267 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:12,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:12,269 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:12,277 INFO L82 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2021-01-06 11:05:12,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:12,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008235600] [2021-01-06 11:05:12,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:12,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008235600] [2021-01-06 11:05:12,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:12,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:05:12,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013687052] [2021-01-06 11:05:12,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:05:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:12,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:05:12,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:05:12,499 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2021-01-06 11:05:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:12,520 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-01-06 11:05:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:05:12,521 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2021-01-06 11:05:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:12,532 INFO L225 Difference]: With dead ends: 29 [2021-01-06 11:05:12,532 INFO L226 Difference]: Without dead ends: 13 [2021-01-06 11:05:12,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:05:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-01-06 11:05:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-01-06 11:05:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-01-06 11:05:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-01-06 11:05:12,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2021-01-06 11:05:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:12,575 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-01-06 11:05:12,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:05:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-01-06 11:05:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 11:05:12,576 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:12,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:12,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:05:12,577 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:12,578 INFO L82 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2021-01-06 11:05:12,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:12,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159907987] [2021-01-06 11:05:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:12,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159907987] [2021-01-06 11:05:12,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:12,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:05:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691366795] [2021-01-06 11:05:12,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:05:12,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:12,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:05:12,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:12,655 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2021-01-06 11:05:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:12,715 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-01-06 11:05:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:05:12,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-01-06 11:05:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:12,717 INFO L225 Difference]: With dead ends: 32 [2021-01-06 11:05:12,717 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 11:05:12,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 11:05:12,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2021-01-06 11:05:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 11:05:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-01-06 11:05:12,724 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-01-06 11:05:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:12,724 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-01-06 11:05:12,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:05:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-01-06 11:05:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 11:05:12,725 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:12,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:12,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:05:12,726 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash -328289196, now seen corresponding path program 1 times [2021-01-06 11:05:12,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:12,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214073632] [2021-01-06 11:05:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:12,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214073632] [2021-01-06 11:05:12,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:12,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:05:12,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944726827] [2021-01-06 11:05:12,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:05:12,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:12,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:05:12,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:12,774 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2021-01-06 11:05:12,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:12,795 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-01-06 11:05:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:05:12,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 11:05:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:12,797 INFO L225 Difference]: With dead ends: 25 [2021-01-06 11:05:12,797 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 11:05:12,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:12,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 11:05:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 11:05:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 11:05:12,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 11:05:12,801 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-01-06 11:05:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:12,802 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 11:05:12,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:05:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 11:05:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 11:05:12,803 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:12,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:12,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 11:05:12,803 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:12,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:12,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1665715163, now seen corresponding path program 1 times [2021-01-06 11:05:12,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:12,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921654891] [2021-01-06 11:05:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:12,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921654891] [2021-01-06 11:05:12,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862571077] [2021-01-06 11:05:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:12,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 11:05:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:13,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:13,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 11:05:13,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274673686] [2021-01-06 11:05:13,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 11:05:13,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:13,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 11:05:13,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:05:13,047 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2021-01-06 11:05:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:13,198 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-01-06 11:05:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:05:13,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-01-06 11:05:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:13,200 INFO L225 Difference]: With dead ends: 41 [2021-01-06 11:05:13,200 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 11:05:13,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:05:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 11:05:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 17. [2021-01-06 11:05:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 11:05:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 11:05:13,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2021-01-06 11:05:13,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:13,214 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 11:05:13,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 11:05:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 11:05:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:05:13,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:13,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:13,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:13,417 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:13,419 INFO L82 PathProgramCache]: Analyzing trace with hash -383963755, now seen corresponding path program 2 times [2021-01-06 11:05:13,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:13,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350314772] [2021-01-06 11:05:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:13,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350314772] [2021-01-06 11:05:13,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658761998] [2021-01-06 11:05:13,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:13,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:13,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:05:13,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:13,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:13,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 11:05:13,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083081854] [2021-01-06 11:05:13,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:05:13,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:05:13,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:05:13,679 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2021-01-06 11:05:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:13,788 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-01-06 11:05:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:05:13,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-01-06 11:05:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:13,790 INFO L225 Difference]: With dead ends: 51 [2021-01-06 11:05:13,790 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 11:05:13,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:05:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 11:05:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 20. [2021-01-06 11:05:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 11:05:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-01-06 11:05:13,796 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2021-01-06 11:05:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:13,797 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-01-06 11:05:13,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:05:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-01-06 11:05:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:05:13,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:13,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:14,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:14,011 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:14,012 INFO L82 PathProgramCache]: Analyzing trace with hash -818562661, now seen corresponding path program 3 times [2021-01-06 11:05:14,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:14,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937733050] [2021-01-06 11:05:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:14,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937733050] [2021-01-06 11:05:14,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661480280] [2021-01-06 11:05:14,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:14,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 11:05:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:14,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:05:14,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:14,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:14,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 11:05:14,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117861074] [2021-01-06 11:05:14,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 11:05:14,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:14,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 11:05:14,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:05:14,306 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2021-01-06 11:05:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:14,442 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-01-06 11:05:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:05:14,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-01-06 11:05:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:14,449 INFO L225 Difference]: With dead ends: 61 [2021-01-06 11:05:14,449 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 11:05:14,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 11:05:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 11:05:14,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 23. [2021-01-06 11:05:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:05:14,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-01-06 11:05:14,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2021-01-06 11:05:14,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:14,458 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-01-06 11:05:14,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 11:05:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-01-06 11:05:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 11:05:14,459 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:14,459 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:14,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:14,665 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:14,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1371826133, now seen corresponding path program 4 times [2021-01-06 11:05:14,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:14,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334946113] [2021-01-06 11:05:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:14,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334946113] [2021-01-06 11:05:14,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642478481] [2021-01-06 11:05:14,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:14,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:14,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:05:14,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:14,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:14,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 11:05:14,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901317975] [2021-01-06 11:05:15,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:05:15,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:15,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:05:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:05:15,001 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2021-01-06 11:05:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:15,136 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-01-06 11:05:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:05:15,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2021-01-06 11:05:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:15,138 INFO L225 Difference]: With dead ends: 71 [2021-01-06 11:05:15,138 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 11:05:15,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:05:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 11:05:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 26. [2021-01-06 11:05:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 11:05:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-01-06 11:05:15,145 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2021-01-06 11:05:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:15,146 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-01-06 11:05:15,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:05:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-01-06 11:05:15,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 11:05:15,147 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:15,147 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:15,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:15,362 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1806260059, now seen corresponding path program 5 times [2021-01-06 11:05:15,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:15,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520420351] [2021-01-06 11:05:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:15,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520420351] [2021-01-06 11:05:15,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118742957] [2021-01-06 11:05:15,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:15,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:05:15,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:05:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:15,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:15,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 11:05:15,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695280514] [2021-01-06 11:05:15,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:05:15,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:15,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:05:15,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:05:15,744 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2021-01-06 11:05:15,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:15,845 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-01-06 11:05:15,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 11:05:15,846 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2021-01-06 11:05:15,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:15,847 INFO L225 Difference]: With dead ends: 81 [2021-01-06 11:05:15,847 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 11:05:15,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:05:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 11:05:15,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 29. [2021-01-06 11:05:15,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 11:05:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-01-06 11:05:15,853 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2021-01-06 11:05:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:15,854 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-01-06 11:05:15,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:05:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-01-06 11:05:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 11:05:15,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:15,855 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:16,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:16,070 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:16,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1004080619, now seen corresponding path program 6 times [2021-01-06 11:05:16,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:16,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405114247] [2021-01-06 11:05:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:16,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405114247] [2021-01-06 11:05:16,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450381925] [2021-01-06 11:05:16,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:16,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 11:05:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:05:16,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:16,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:16,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 11:05:16,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398394675] [2021-01-06 11:05:16,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 11:05:16,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:16,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 11:05:16,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:05:16,484 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2021-01-06 11:05:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:16,729 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2021-01-06 11:05:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:05:16,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2021-01-06 11:05:16,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:16,735 INFO L225 Difference]: With dead ends: 91 [2021-01-06 11:05:16,735 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 11:05:16,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 11:05:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 11:05:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 32. [2021-01-06 11:05:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 11:05:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-01-06 11:05:16,754 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-01-06 11:05:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:16,755 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-01-06 11:05:16,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 11:05:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-01-06 11:05:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 11:05:16,756 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:16,756 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:16,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:16,958 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2065717989, now seen corresponding path program 7 times [2021-01-06 11:05:16,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:16,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742330202] [2021-01-06 11:05:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742330202] [2021-01-06 11:05:17,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919252704] [2021-01-06 11:05:17,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:17,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:05:17,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:17,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:17,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 11:05:17,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903984459] [2021-01-06 11:05:17,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:05:17,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:05:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:05:17,279 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2021-01-06 11:05:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:17,385 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-01-06 11:05:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:05:17,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2021-01-06 11:05:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:17,387 INFO L225 Difference]: With dead ends: 101 [2021-01-06 11:05:17,387 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 11:05:17,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:05:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 11:05:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 35. [2021-01-06 11:05:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 11:05:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-01-06 11:05:17,393 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2021-01-06 11:05:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:17,393 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-01-06 11:05:17,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:05:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-01-06 11:05:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:05:17,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:17,395 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:17,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:05:17,607 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:17,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1165439915, now seen corresponding path program 8 times [2021-01-06 11:05:17,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:17,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608123672] [2021-01-06 11:05:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:17,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608123672] [2021-01-06 11:05:17,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157417056] [2021-01-06 11:05:17,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:17,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:17,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:05:17,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:17,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:17,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 11:05:17,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444526414] [2021-01-06 11:05:17,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 11:05:17,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:17,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 11:05:17,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:05:17,939 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2021-01-06 11:05:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:18,070 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-01-06 11:05:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:05:18,070 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2021-01-06 11:05:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:18,074 INFO L225 Difference]: With dead ends: 111 [2021-01-06 11:05:18,074 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 11:05:18,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:05:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 11:05:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 38. [2021-01-06 11:05:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 11:05:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-01-06 11:05:18,094 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2021-01-06 11:05:18,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:18,094 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-01-06 11:05:18,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 11:05:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-01-06 11:05:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 11:05:18,098 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:18,098 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:18,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 11:05:18,313 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1242866395, now seen corresponding path program 9 times [2021-01-06 11:05:18,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:18,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211823102] [2021-01-06 11:05:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:18,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211823102] [2021-01-06 11:05:18,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612487168] [2021-01-06 11:05:18,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:19,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 11:05:19,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:05:19,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:19,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:19,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 11:05:19,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904887532] [2021-01-06 11:05:19,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:05:19,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:19,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:05:19,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:05:19,211 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 13 states. [2021-01-06 11:05:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:19,350 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2021-01-06 11:05:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 11:05:19,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2021-01-06 11:05:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:19,351 INFO L225 Difference]: With dead ends: 121 [2021-01-06 11:05:19,352 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 11:05:19,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:05:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 11:05:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 41. [2021-01-06 11:05:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 11:05:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-01-06 11:05:19,357 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2021-01-06 11:05:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:19,357 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-01-06 11:05:19,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:05:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-01-06 11:05:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 11:05:19,358 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:19,358 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:19,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:19,572 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:19,573 INFO L82 PathProgramCache]: Analyzing trace with hash -332532075, now seen corresponding path program 10 times [2021-01-06 11:05:19,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:19,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225673039] [2021-01-06 11:05:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:19,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225673039] [2021-01-06 11:05:19,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333531029] [2021-01-06 11:05:19,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:20,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:20,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:05:20,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:20,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 11:05:20,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340577126] [2021-01-06 11:05:20,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:05:20,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:05:20,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:05:20,203 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 14 states. [2021-01-06 11:05:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:20,349 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2021-01-06 11:05:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:05:20,350 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2021-01-06 11:05:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:20,351 INFO L225 Difference]: With dead ends: 131 [2021-01-06 11:05:20,351 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 11:05:20,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:05:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 11:05:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 44. [2021-01-06 11:05:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 11:05:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-01-06 11:05:20,358 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2021-01-06 11:05:20,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:20,358 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-01-06 11:05:20,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:05:20,358 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-01-06 11:05:20,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:05:20,359 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:20,359 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:20,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:20,575 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1920708453, now seen corresponding path program 11 times [2021-01-06 11:05:20,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:20,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484157992] [2021-01-06 11:05:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484157992] [2021-01-06 11:05:20,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387249860] [2021-01-06 11:05:20,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:21,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 11:05:21,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:05:21,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:21,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:21,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 11:05:21,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855258142] [2021-01-06 11:05:21,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:05:21,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:05:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:05:21,676 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 15 states. [2021-01-06 11:05:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:21,830 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2021-01-06 11:05:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:05:21,831 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2021-01-06 11:05:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:21,834 INFO L225 Difference]: With dead ends: 141 [2021-01-06 11:05:21,834 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 11:05:21,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:05:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 11:05:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 47. [2021-01-06 11:05:21,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 11:05:21,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-01-06 11:05:21,853 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2021-01-06 11:05:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:21,854 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-01-06 11:05:21,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:05:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-01-06 11:05:21,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:05:21,855 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:21,855 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:22,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:05:22,071 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:22,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1923452715, now seen corresponding path program 12 times [2021-01-06 11:05:22,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:22,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666220186] [2021-01-06 11:05:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666220186] [2021-01-06 11:05:22,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356078389] [2021-01-06 11:05:22,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:25,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 11:05:25,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:05:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:25,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:25,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 11:05:25,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37599483] [2021-01-06 11:05:25,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 11:05:25,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:25,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 11:05:25,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:05:25,702 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 16 states. [2021-01-06 11:05:25,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:25,876 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2021-01-06 11:05:25,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 11:05:25,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2021-01-06 11:05:25,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:25,878 INFO L225 Difference]: With dead ends: 151 [2021-01-06 11:05:25,878 INFO L226 Difference]: Without dead ends: 143 [2021-01-06 11:05:25,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 11:05:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-01-06 11:05:25,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 50. [2021-01-06 11:05:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 11:05:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-01-06 11:05:25,894 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2021-01-06 11:05:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:25,896 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-01-06 11:05:25,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 11:05:25,896 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-01-06 11:05:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 11:05:25,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:25,903 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:26,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:05:26,120 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2073383333, now seen corresponding path program 13 times [2021-01-06 11:05:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:26,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888889380] [2021-01-06 11:05:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:26,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888889380] [2021-01-06 11:05:26,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026167105] [2021-01-06 11:05:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:05:26,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:26,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:26,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 11:05:26,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025960480] [2021-01-06 11:05:26,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:05:26,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:05:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:05:26,541 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 17 states. [2021-01-06 11:05:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:26,746 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2021-01-06 11:05:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:05:26,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2021-01-06 11:05:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:26,749 INFO L225 Difference]: With dead ends: 161 [2021-01-06 11:05:26,749 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 11:05:26,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:05:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 11:05:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 53. [2021-01-06 11:05:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 11:05:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-01-06 11:05:26,754 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2021-01-06 11:05:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:26,755 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-01-06 11:05:26,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:05:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-01-06 11:05:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 11:05:26,756 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:26,756 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:26,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:05:26,969 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:26,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:26,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1890436331, now seen corresponding path program 14 times [2021-01-06 11:05:26,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:26,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403062913] [2021-01-06 11:05:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:27,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403062913] [2021-01-06 11:05:27,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988355163] [2021-01-06 11:05:27,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:27,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:05:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:27,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:27,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 11:05:27,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804829792] [2021-01-06 11:05:27,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:05:27,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:27,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:05:27,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:05:27,394 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2021-01-06 11:05:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:27,603 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2021-01-06 11:05:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:05:27,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2021-01-06 11:05:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:27,605 INFO L225 Difference]: With dead ends: 171 [2021-01-06 11:05:27,605 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 11:05:27,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:05:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 11:05:27,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 56. [2021-01-06 11:05:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 11:05:27,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-01-06 11:05:27,611 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2021-01-06 11:05:27,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:27,612 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-01-06 11:05:27,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:05:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-01-06 11:05:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:05:27,613 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:27,613 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:27,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:27,828 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:27,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2029798373, now seen corresponding path program 15 times [2021-01-06 11:05:27,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:27,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399908507] [2021-01-06 11:05:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:28,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399908507] [2021-01-06 11:05:28,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824126848] [2021-01-06 11:05:28,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:48,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 11:05:48,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:48,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:05:48,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:49,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:49,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 11:05:49,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82084168] [2021-01-06 11:05:49,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 11:05:49,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:49,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 11:05:49,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:05:49,090 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 19 states. [2021-01-06 11:05:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:49,322 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2021-01-06 11:05:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:05:49,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2021-01-06 11:05:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:49,325 INFO L225 Difference]: With dead ends: 181 [2021-01-06 11:05:49,325 INFO L226 Difference]: Without dead ends: 173 [2021-01-06 11:05:49,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 11:05:49,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-01-06 11:05:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 59. [2021-01-06 11:05:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 11:05:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-01-06 11:05:49,331 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 53 [2021-01-06 11:05:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:49,331 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-01-06 11:05:49,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 11:05:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-01-06 11:05:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 11:05:49,333 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:49,333 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:49,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:05:49,548 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -531016363, now seen corresponding path program 16 times [2021-01-06 11:05:49,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:49,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143032646] [2021-01-06 11:05:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:49,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143032646] [2021-01-06 11:05:49,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614021969] [2021-01-06 11:05:49,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:50,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:50,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:50,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:05:50,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:50,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:50,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 11:05:50,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948989288] [2021-01-06 11:05:50,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:05:50,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:05:50,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:05:50,984 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 20 states. [2021-01-06 11:05:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:51,223 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-01-06 11:05:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:05:51,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2021-01-06 11:05:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:51,226 INFO L225 Difference]: With dead ends: 191 [2021-01-06 11:05:51,226 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 11:05:51,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:05:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 11:05:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 62. [2021-01-06 11:05:51,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 11:05:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-01-06 11:05:51,231 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 56 [2021-01-06 11:05:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:51,232 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-01-06 11:05:51,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:05:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-01-06 11:05:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 11:05:51,232 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:51,233 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:51,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:51,440 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash -796165669, now seen corresponding path program 17 times [2021-01-06 11:05:51,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:51,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717992359] [2021-01-06 11:05:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:05:51,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717992359] [2021-01-06 11:05:51,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2701869] [2021-01-06 11:05:51,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:28,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 11:07:28,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:28,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:07:28,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:07:28,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:28,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 11:07:28,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513603933] [2021-01-06 11:07:28,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:07:28,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:07:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:07:28,592 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 21 states. [2021-01-06 11:07:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:28,822 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2021-01-06 11:07:28,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:07:28,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2021-01-06 11:07:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:28,824 INFO L225 Difference]: With dead ends: 201 [2021-01-06 11:07:28,824 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 11:07:28,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:07:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 11:07:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 65. [2021-01-06 11:07:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 11:07:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2021-01-06 11:07:28,828 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2021-01-06 11:07:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:28,829 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2021-01-06 11:07:28,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:07:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2021-01-06 11:07:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 11:07:28,830 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:28,830 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:29,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:29,044 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:29,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1414283371, now seen corresponding path program 18 times [2021-01-06 11:07:29,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:29,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359212172] [2021-01-06 11:07:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:07:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359212172] [2021-01-06 11:07:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745898269] [2021-01-06 11:07:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:09:06,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 11:09:06,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:09:06,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:09:06,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:09:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:09:06,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:09:06,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 11:09:06,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086261986] [2021-01-06 11:09:06,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:09:06,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:09:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:09:06,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:09:06,454 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 22 states. [2021-01-06 11:09:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:09:06,689 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2021-01-06 11:09:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 11:09:06,689 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2021-01-06 11:09:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:09:06,691 INFO L225 Difference]: With dead ends: 211 [2021-01-06 11:09:06,691 INFO L226 Difference]: Without dead ends: 203 [2021-01-06 11:09:06,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:09:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-01-06 11:09:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 68. [2021-01-06 11:09:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 11:09:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-01-06 11:09:06,695 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2021-01-06 11:09:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:09:06,695 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-01-06 11:09:06,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:09:06,695 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-01-06 11:09:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 11:09:06,696 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:09:06,696 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:09:06,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 11:09:06,909 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:09:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:09:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1061021595, now seen corresponding path program 19 times [2021-01-06 11:09:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:09:06,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376719032] [2021-01-06 11:09:06,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:09:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:09:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:09:07,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376719032] [2021-01-06 11:09:07,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248704513] [2021-01-06 11:09:07,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:09:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:09:07,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 11:09:07,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:09:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:09:07,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:09:07,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 11:09:07,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853751782] [2021-01-06 11:09:07,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 11:09:07,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:09:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 11:09:07,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:09:07,409 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 23 states. [2021-01-06 11:09:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:09:07,651 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2021-01-06 11:09:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:09:07,651 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2021-01-06 11:09:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:09:07,653 INFO L225 Difference]: With dead ends: 221 [2021-01-06 11:09:07,653 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 11:09:07,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:09:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 11:09:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 71. [2021-01-06 11:09:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 11:09:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2021-01-06 11:09:07,658 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 65 [2021-01-06 11:09:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:09:07,659 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2021-01-06 11:09:07,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 11:09:07,659 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2021-01-06 11:09:07,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 11:09:07,660 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:09:07,660 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:09:07,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:09:07,874 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:09:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:09:07,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1717208619, now seen corresponding path program 20 times [2021-01-06 11:09:07,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:09:07,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939354571] [2021-01-06 11:09:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:09:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:09:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:09:08,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939354571] [2021-01-06 11:09:08,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121849962] [2021-01-06 11:09:08,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:09:08,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:09:08,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:09:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 11:09:08,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:09:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:09:08,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:09:08,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 11:09:08,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389667275] [2021-01-06 11:09:08,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 11:09:08,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:09:08,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 11:09:08,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:09:08,493 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 24 states. [2021-01-06 11:09:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:09:08,750 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2021-01-06 11:09:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:09:08,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2021-01-06 11:09:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:09:08,752 INFO L225 Difference]: With dead ends: 231 [2021-01-06 11:09:08,752 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 11:09:08,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:09:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 11:09:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 74. [2021-01-06 11:09:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 11:09:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-01-06 11:09:08,756 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 68 [2021-01-06 11:09:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:09:08,757 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-01-06 11:09:08,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 11:09:08,757 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-01-06 11:09:08,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 11:09:08,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:09:08,758 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:09:08,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 11:09:08,974 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:09:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:09:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash 341247323, now seen corresponding path program 21 times [2021-01-06 11:09:08,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:09:08,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672575417] [2021-01-06 11:09:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:09:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:09:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:09:09,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672575417] [2021-01-06 11:09:09,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021474641] [2021-01-06 11:09:09,321 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