/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-invgen/seq-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:50:24,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:50:24,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:50:24,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:50:24,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:50:24,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:50:24,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:50:24,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:50:24,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:50:24,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:50:24,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:50:24,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:50:24,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:50:24,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:50:24,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:50:24,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:50:24,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:50:24,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:50:24,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:50:25,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:50:25,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:50:25,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:50:25,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:50:25,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:50:25,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:50:25,032 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:50:25,033 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:50:25,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:50:25,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:50:25,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:50:25,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:50:25,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:50:25,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:50:25,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:50:25,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:50:25,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:50:25,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:50:25,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:50:25,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:50:25,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:50:25,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:50:25,113 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:50:25,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:50:25,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:50:25,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:50:25,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:50:25,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:50:25,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:50:25,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:50:25,117 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:50:25,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:50:25,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:50:25,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:50:25,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:50:25,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:50:25,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:50:25,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:50:25,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:50:25,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:50:25,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:50:25,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:50:25,120 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:50:25,121 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:50:25,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:50:25,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:50:25,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:50:25,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:50:25,556 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:50:25,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/seq-3.i [2021-01-06 16:50:25,640 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f10e314b7/146de47831794a0e80b544f11730003f/FLAGf73c38d41 [2021-01-06 16:50:26,336 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:50:26,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i [2021-01-06 16:50:26,352 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f10e314b7/146de47831794a0e80b544f11730003f/FLAGf73c38d41 [2021-01-06 16:50:26,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f10e314b7/146de47831794a0e80b544f11730003f [2021-01-06 16:50:26,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:50:26,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:50:26,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:26,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:50:26,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:50:26,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:26" (1/1) ... [2021-01-06 16:50:26,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@790fa37a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:26, skipping insertion in model container [2021-01-06 16:50:26,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:50:26" (1/1) ... [2021-01-06 16:50:26,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:50:26,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:50:26,980 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n0~0,] left hand side expression in assignment: lhs: VariableLHS[~n1~0,] [2021-01-06 16:50:27,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:27,018 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:50:27,033 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] left hand side expression in assignment: lhs: VariableLHS[~n0~0,] left hand side expression in assignment: lhs: VariableLHS[~n1~0,] [2021-01-06 16:50:27,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:50:27,056 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:50:27,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27 WrapperNode [2021-01-06 16:50:27,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:50:27,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:27,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:50:27,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:50:27,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:50:27,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:50:27,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:50:27,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:50:27,111 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... [2021-01-06 16:50:27,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:50:27,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:50:27,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:50:27,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:50:27,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:50:27,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:50:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:50:27,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:50:27,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:50:27,518 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:50:27,518 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 16:50:27,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:27 BoogieIcfgContainer [2021-01-06 16:50:27,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:50:27,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:50:27,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:50:27,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:50:27,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:50:26" (1/3) ... [2021-01-06 16:50:27,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d626116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:27, skipping insertion in model container [2021-01-06 16:50:27,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:50:27" (2/3) ... [2021-01-06 16:50:27,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d626116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:50:27, skipping insertion in model container [2021-01-06 16:50:27,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:50:27" (3/3) ... [2021-01-06 16:50:27,571 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.i [2021-01-06 16:50:27,578 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:50:27,584 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:50:27,618 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:50:27,663 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:50:27,664 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:50:27,664 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:50:27,664 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:50:27,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:50:27,666 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:50:27,666 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:50:27,667 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:50:27,688 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 16:50:27,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:50:27,695 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:27,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:27,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash -163175075, now seen corresponding path program 1 times [2021-01-06 16:50:27,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:27,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558093391] [2021-01-06 16:50:27,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:28,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558093391] [2021-01-06 16:50:28,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:50:28,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 16:50:28,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850046248] [2021-01-06 16:50:28,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:50:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:28,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:50:28,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:50:28,106 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 7 states. [2021-01-06 16:50:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:28,220 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2021-01-06 16:50:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:50:28,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2021-01-06 16:50:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:28,232 INFO L225 Difference]: With dead ends: 48 [2021-01-06 16:50:28,232 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:50:28,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:50:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:50:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-01-06 16:50:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:50:28,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-01-06 16:50:28,273 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-01-06 16:50:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:28,274 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-01-06 16:50:28,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:50:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-01-06 16:50:28,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:50:28,275 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:28,275 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:28,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:50:28,276 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:28,277 INFO L82 PathProgramCache]: Analyzing trace with hash -712013865, now seen corresponding path program 1 times [2021-01-06 16:50:28,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:28,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401395372] [2021-01-06 16:50:28,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:28,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401395372] [2021-01-06 16:50:28,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365121566] [2021-01-06 16:50:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:28,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:50:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:28,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:50:28,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-01-06 16:50:28,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268533824] [2021-01-06 16:50:28,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:50:28,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:28,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:50:28,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:50:28,499 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 5 states. [2021-01-06 16:50:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:28,574 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-01-06 16:50:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:50:28,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 16:50:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:28,577 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:50:28,577 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:50:28,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:50:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:50:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2021-01-06 16:50:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 16:50:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 16:50:28,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-01-06 16:50:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:28,596 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 16:50:28,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:50:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 16:50:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:50:28,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:28,599 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:28,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:50:28,815 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1243265849, now seen corresponding path program 1 times [2021-01-06 16:50:28,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:28,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292967629] [2021-01-06 16:50:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:29,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292967629] [2021-01-06 16:50:29,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574477344] [2021-01-06 16:50:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:50:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:29,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:29,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-01-06 16:50:29,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254481758] [2021-01-06 16:50:29,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:50:29,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:50:29,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:50:29,200 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 15 states. [2021-01-06 16:50:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:29,380 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 16:50:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:50:29,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2021-01-06 16:50:29,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:29,382 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:50:29,382 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 16:50:29,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:50:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 16:50:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-01-06 16:50:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:50:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-01-06 16:50:29,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2021-01-06 16:50:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:29,389 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-01-06 16:50:29,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:50:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-01-06 16:50:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:50:29,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:29,390 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:29,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:29,605 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:29,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2084334856, now seen corresponding path program 1 times [2021-01-06 16:50:29,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:29,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500880621] [2021-01-06 16:50:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:29,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500880621] [2021-01-06 16:50:29,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513457487] [2021-01-06 16:50:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:50:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:29,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:29,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-01-06 16:50:29,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925530140] [2021-01-06 16:50:29,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:50:29,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:50:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:50:29,909 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 14 states. [2021-01-06 16:50:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:30,046 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-01-06 16:50:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:50:30,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2021-01-06 16:50:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:30,048 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:50:30,048 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 16:50:30,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:50:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 16:50:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2021-01-06 16:50:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 16:50:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-01-06 16:50:30,054 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-01-06 16:50:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:30,054 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-01-06 16:50:30,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:50:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-01-06 16:50:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:50:30,055 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:30,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:30,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:30,270 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:30,271 INFO L82 PathProgramCache]: Analyzing trace with hash -929410893, now seen corresponding path program 2 times [2021-01-06 16:50:30,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:30,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509062675] [2021-01-06 16:50:30,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509062675] [2021-01-06 16:50:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076598986] [2021-01-06 16:50:30,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:30,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:50:30,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:30,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:50:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:30,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:30,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 16:50:30,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968554312] [2021-01-06 16:50:30,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:50:30,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:30,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:50:30,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:50:30,462 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2021-01-06 16:50:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:30,554 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-01-06 16:50:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:50:30,555 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 16:50:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:30,555 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:50:30,555 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:50:30,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:50:30,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:50:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-01-06 16:50:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 16:50:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 16:50:30,562 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-01-06 16:50:30,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:30,562 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 16:50:30,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:50:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 16:50:30,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:50:30,563 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:30,563 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:30,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:30,778 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:30,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:30,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1579087069, now seen corresponding path program 3 times [2021-01-06 16:50:30,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:30,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234949126] [2021-01-06 16:50:30,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:30,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234949126] [2021-01-06 16:50:30,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276665444] [2021-01-06 16:50:30,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:30,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 16:50:30,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:30,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:50:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:31,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:31,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-01-06 16:50:31,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596808616] [2021-01-06 16:50:31,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:50:31,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:31,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:50:31,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:50:31,214 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 19 states. [2021-01-06 16:50:31,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:31,512 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-01-06 16:50:31,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:50:31,512 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2021-01-06 16:50:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:31,513 INFO L225 Difference]: With dead ends: 51 [2021-01-06 16:50:31,514 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 16:50:31,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:50:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 16:50:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2021-01-06 16:50:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:50:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-06 16:50:31,535 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2021-01-06 16:50:31,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:31,535 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-06 16:50:31,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:50:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-06 16:50:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:50:31,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:31,538 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:31,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:50:31,739 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1678234908, now seen corresponding path program 1 times [2021-01-06 16:50:31,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:31,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177924569] [2021-01-06 16:50:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:31,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177924569] [2021-01-06 16:50:31,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225319301] [2021-01-06 16:50:31,867 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:50:31,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:32,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:32,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-01-06 16:50:32,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844414527] [2021-01-06 16:50:32,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:50:32,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:32,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:50:32,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:50:32,176 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 18 states. [2021-01-06 16:50:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:32,452 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-01-06 16:50:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:50:32,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 19 [2021-01-06 16:50:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:32,453 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:50:32,453 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:50:32,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:50:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:50:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 25. [2021-01-06 16:50:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:50:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-01-06 16:50:32,461 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2021-01-06 16:50:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:32,461 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-01-06 16:50:32,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:50:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-01-06 16:50:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 16:50:32,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:32,462 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:32,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:32,677 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:32,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1265791229, now seen corresponding path program 2 times [2021-01-06 16:50:32,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:32,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744652625] [2021-01-06 16:50:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:32,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744652625] [2021-01-06 16:50:32,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252721290] [2021-01-06 16:50:32,798 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:32,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:50:32,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:50:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:33,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:33,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-01-06 16:50:33,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702800763] [2021-01-06 16:50:33,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:50:33,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:50:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:50:33,005 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 17 states. [2021-01-06 16:50:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:33,249 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-01-06 16:50:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:50:33,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2021-01-06 16:50:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:33,251 INFO L225 Difference]: With dead ends: 79 [2021-01-06 16:50:33,251 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:50:33,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:50:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:50:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2021-01-06 16:50:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:50:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-01-06 16:50:33,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 19 [2021-01-06 16:50:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:33,259 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-01-06 16:50:33,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:50:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-01-06 16:50:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 16:50:33,260 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:33,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:33,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:33,474 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:33,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1081918121, now seen corresponding path program 4 times [2021-01-06 16:50:33,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:33,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319154557] [2021-01-06 16:50:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:33,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319154557] [2021-01-06 16:50:33,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633364594] [2021-01-06 16:50:33,559 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:33,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:50:33,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:33,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:50:33,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:33,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:33,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 16:50:33,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608644235] [2021-01-06 16:50:33,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:50:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:50:33,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:50:33,676 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 9 states. [2021-01-06 16:50:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:33,798 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 16:50:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:50:33,799 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2021-01-06 16:50:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:33,800 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:50:33,800 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:50:33,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:50:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:50:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-01-06 16:50:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 16:50:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-01-06 16:50:33,807 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2021-01-06 16:50:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:33,808 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-01-06 16:50:33,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:50:33,808 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-01-06 16:50:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:33,809 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:33,809 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:34,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:50:34,023 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:34,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1983310407, now seen corresponding path program 5 times [2021-01-06 16:50:34,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:34,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133766543] [2021-01-06 16:50:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:34,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133766543] [2021-01-06 16:50:34,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120666705] [2021-01-06 16:50:34,186 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:34,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 16:50:34,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:34,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:50:34,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:34,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:34,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-01-06 16:50:34,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32656182] [2021-01-06 16:50:34,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:50:34,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:34,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:50:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:50:34,521 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 23 states. [2021-01-06 16:50:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:34,835 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-01-06 16:50:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:50:34,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2021-01-06 16:50:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:34,840 INFO L225 Difference]: With dead ends: 64 [2021-01-06 16:50:34,841 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:50:34,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:50:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:50:34,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2021-01-06 16:50:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:50:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 16:50:34,858 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-01-06 16:50:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:34,858 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 16:50:34,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:50:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 16:50:34,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:34,859 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:34,859 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:35,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:35,073 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1279672712, now seen corresponding path program 2 times [2021-01-06 16:50:35,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:35,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035876362] [2021-01-06 16:50:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:35,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035876362] [2021-01-06 16:50:35,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686805654] [2021-01-06 16:50:35,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:35,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:50:35,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:35,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:50:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:35,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:35,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-01-06 16:50:35,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340534347] [2021-01-06 16:50:35,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:50:35,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:35,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:50:35,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:50:35,524 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 22 states. [2021-01-06 16:50:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:35,869 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-01-06 16:50:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:50:35,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2021-01-06 16:50:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:35,870 INFO L225 Difference]: With dead ends: 81 [2021-01-06 16:50:35,870 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 16:50:35,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:50:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 16:50:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 31. [2021-01-06 16:50:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:50:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 16:50:35,879 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-01-06 16:50:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:35,879 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 16:50:35,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:50:35,879 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 16:50:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:35,880 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:35,880 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:36,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:36,095 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:36,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1791066585, now seen corresponding path program 3 times [2021-01-06 16:50:36,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:36,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321300653] [2021-01-06 16:50:36,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:36,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321300653] [2021-01-06 16:50:36,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678916201] [2021-01-06 16:50:36,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:36,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:50:36,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:36,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:50:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:36,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:36,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-01-06 16:50:36,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665026519] [2021-01-06 16:50:36,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:50:36,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:36,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:50:36,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:50:36,463 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 21 states. [2021-01-06 16:50:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:36,822 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-01-06 16:50:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:50:36,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2021-01-06 16:50:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:36,823 INFO L225 Difference]: With dead ends: 97 [2021-01-06 16:50:36,823 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:50:36,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:50:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:50:36,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 31. [2021-01-06 16:50:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:50:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 16:50:36,832 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2021-01-06 16:50:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:36,832 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 16:50:36,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:50:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 16:50:36,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 16:50:36,833 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:36,833 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:37,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:50:37,048 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1712107944, now seen corresponding path program 3 times [2021-01-06 16:50:37,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:37,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692005680] [2021-01-06 16:50:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:37,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692005680] [2021-01-06 16:50:37,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246858100] [2021-01-06 16:50:37,190 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:37,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:50:37,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:50:37,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:37,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:37,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-01-06 16:50:37,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428237342] [2021-01-06 16:50:37,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:50:37,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:50:37,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:50:37,424 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 20 states. [2021-01-06 16:50:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:37,728 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-01-06 16:50:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:50:37,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 16:50:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:37,729 INFO L225 Difference]: With dead ends: 115 [2021-01-06 16:50:37,729 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 16:50:37,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:50:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 16:50:37,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 33. [2021-01-06 16:50:37,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 16:50:37,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-01-06 16:50:37,738 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 23 [2021-01-06 16:50:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:37,738 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-01-06 16:50:37,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:50:37,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-01-06 16:50:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:50:37,739 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:37,739 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:37,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:50:37,953 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:37,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1769959117, now seen corresponding path program 6 times [2021-01-06 16:50:37,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:37,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143258499] [2021-01-06 16:50:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:38,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143258499] [2021-01-06 16:50:38,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967942104] [2021-01-06 16:50:38,035 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:38,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 16:50:38,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:50:38,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:38,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:38,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 16:50:38,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590579125] [2021-01-06 16:50:38,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:50:38,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:38,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:50:38,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:50:38,156 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 10 states. [2021-01-06 16:50:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:38,292 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-01-06 16:50:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:50:38,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2021-01-06 16:50:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:38,294 INFO L225 Difference]: With dead ends: 44 [2021-01-06 16:50:38,294 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:50:38,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:50:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:50:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-01-06 16:50:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 16:50:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-01-06 16:50:38,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2021-01-06 16:50:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:38,302 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-01-06 16:50:38,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:50:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-01-06 16:50:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:50:38,303 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:38,303 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:38,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:50:38,517 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash 466281565, now seen corresponding path program 7 times [2021-01-06 16:50:38,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:38,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505637747] [2021-01-06 16:50:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:38,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505637747] [2021-01-06 16:50:38,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359537371] [2021-01-06 16:50:38,679 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:38,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:50:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:39,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:39,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-01-06 16:50:39,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085481245] [2021-01-06 16:50:39,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:50:39,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:39,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:50:39,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:50:39,048 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 27 states. [2021-01-06 16:50:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:39,378 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-01-06 16:50:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:50:39,379 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2021-01-06 16:50:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:39,380 INFO L225 Difference]: With dead ends: 77 [2021-01-06 16:50:39,380 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:50:39,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:50:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:50:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2021-01-06 16:50:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:50:39,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 16:50:39,389 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-01-06 16:50:39,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:39,389 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 16:50:39,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:50:39,390 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 16:50:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:50:39,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:39,390 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:39,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:39,606 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:39,607 INFO L82 PathProgramCache]: Analyzing trace with hash 397088156, now seen corresponding path program 4 times [2021-01-06 16:50:39,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:39,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018583071] [2021-01-06 16:50:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018583071] [2021-01-06 16:50:39,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293345847] [2021-01-06 16:50:39,768 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:39,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:50:39,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:50:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:40,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:40,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-01-06 16:50:40,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666797575] [2021-01-06 16:50:40,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:50:40,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:40,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:50:40,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:50:40,105 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 26 states. [2021-01-06 16:50:40,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:40,525 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-01-06 16:50:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:50:40,525 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 27 [2021-01-06 16:50:40,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:40,526 INFO L225 Difference]: With dead ends: 98 [2021-01-06 16:50:40,527 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 16:50:40,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1374, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:50:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 16:50:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 37. [2021-01-06 16:50:40,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:50:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 16:50:40,541 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-01-06 16:50:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:40,541 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 16:50:40,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:50:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 16:50:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:50:40,542 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:40,542 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:40,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:50:40,756 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1267711875, now seen corresponding path program 5 times [2021-01-06 16:50:40,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:40,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838334057] [2021-01-06 16:50:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:40,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838334057] [2021-01-06 16:50:40,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242992698] [2021-01-06 16:50:40,927 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:40,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 16:50:40,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:50:40,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:41,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:41,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-01-06 16:50:41,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455522855] [2021-01-06 16:50:41,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:50:41,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:41,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:50:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:50:41,247 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 25 states. [2021-01-06 16:50:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:41,689 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-01-06 16:50:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:50:41,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2021-01-06 16:50:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:41,691 INFO L225 Difference]: With dead ends: 118 [2021-01-06 16:50:41,691 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 16:50:41,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:50:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 16:50:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 37. [2021-01-06 16:50:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:50:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 16:50:41,700 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-01-06 16:50:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:41,701 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 16:50:41,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:50:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 16:50:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:50:41,701 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:41,702 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:41,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:50:41,916 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:41,916 INFO L82 PathProgramCache]: Analyzing trace with hash 618247548, now seen corresponding path program 6 times [2021-01-06 16:50:41,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:41,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770477207] [2021-01-06 16:50:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:42,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770477207] [2021-01-06 16:50:42,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568383401] [2021-01-06 16:50:42,102 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:42,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 16:50:42,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:50:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:42,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:42,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-01-06 16:50:42,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203853889] [2021-01-06 16:50:42,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:50:42,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:42,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:50:42,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:50:42,424 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 24 states. [2021-01-06 16:50:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:42,852 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2021-01-06 16:50:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:50:42,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2021-01-06 16:50:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:42,853 INFO L225 Difference]: With dead ends: 137 [2021-01-06 16:50:42,853 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 16:50:42,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:50:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 16:50:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 37. [2021-01-06 16:50:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:50:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 16:50:42,863 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2021-01-06 16:50:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 16:50:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:50:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 16:50:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:50:42,864 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:42,864 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:43,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:50:43,079 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:43,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:43,079 INFO L82 PathProgramCache]: Analyzing trace with hash 956179613, now seen corresponding path program 4 times [2021-01-06 16:50:43,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:43,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122024576] [2021-01-06 16:50:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:43,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122024576] [2021-01-06 16:50:43,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499244179] [2021-01-06 16:50:43,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:43,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:50:43,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:50:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:43,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:43,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-01-06 16:50:43,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455925228] [2021-01-06 16:50:43,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:50:43,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:43,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:50:43,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:50:43,554 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 23 states. [2021-01-06 16:50:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:43,958 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2021-01-06 16:50:43,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:50:43,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2021-01-06 16:50:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:43,959 INFO L225 Difference]: With dead ends: 158 [2021-01-06 16:50:43,959 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 16:50:43,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=1173, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:50:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 16:50:43,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 39. [2021-01-06 16:50:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 16:50:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-06 16:50:43,968 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 27 [2021-01-06 16:50:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:43,968 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-06 16:50:43,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:50:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-06 16:50:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 16:50:43,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:43,969 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:44,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:44,184 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:44,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1056697641, now seen corresponding path program 8 times [2021-01-06 16:50:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:44,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478522086] [2021-01-06 16:50:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:44,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478522086] [2021-01-06 16:50:44,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569749511] [2021-01-06 16:50:44,271 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:44,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:50:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:50:44,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:44,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:44,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-06 16:50:44,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538642128] [2021-01-06 16:50:44,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:50:44,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:44,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:50:44,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:50:44,388 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 11 states. [2021-01-06 16:50:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:44,564 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-01-06 16:50:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:50:44,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2021-01-06 16:50:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:44,565 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:50:44,565 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 16:50:44,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:50:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 16:50:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-01-06 16:50:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:50:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-01-06 16:50:44,573 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 28 [2021-01-06 16:50:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:44,573 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-01-06 16:50:44,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:50:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-01-06 16:50:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:50:44,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:44,574 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:44,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:44,783 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:44,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:44,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2035699769, now seen corresponding path program 9 times [2021-01-06 16:50:44,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:44,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016951947] [2021-01-06 16:50:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:44,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016951947] [2021-01-06 16:50:44,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684741836] [2021-01-06 16:50:44,983 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:45,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:50:45,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:45,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:50:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:45,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:45,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-01-06 16:50:45,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395035710] [2021-01-06 16:50:45,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:50:45,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:45,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:50:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:50:45,440 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 31 states. [2021-01-06 16:50:45,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:45,863 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2021-01-06 16:50:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:50:45,863 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2021-01-06 16:50:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:45,863 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:50:45,864 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 16:50:45,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:50:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 16:50:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-01-06 16:50:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:50:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-01-06 16:50:45,872 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-01-06 16:50:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:45,872 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-01-06 16:50:45,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:50:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-01-06 16:50:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:50:45,873 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:45,873 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:46,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:50:46,074 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash 992856568, now seen corresponding path program 7 times [2021-01-06 16:50:46,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:46,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048558342] [2021-01-06 16:50:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:46,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048558342] [2021-01-06 16:50:46,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024131644] [2021-01-06 16:50:46,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:50:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:46,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:46,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-01-06 16:50:46,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129803644] [2021-01-06 16:50:46,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:50:46,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:50:46,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:50:46,734 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 30 states. [2021-01-06 16:50:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:47,345 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2021-01-06 16:50:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:50:47,345 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 31 [2021-01-06 16:50:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:47,346 INFO L225 Difference]: With dead ends: 115 [2021-01-06 16:50:47,346 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 16:50:47,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=460, Invalid=1892, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:50:47,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 16:50:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 43. [2021-01-06 16:50:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:50:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-01-06 16:50:47,357 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-01-06 16:50:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:47,358 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-01-06 16:50:47,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:50:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-01-06 16:50:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:50:47,362 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:47,362 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:47,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:50:47,573 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1236311129, now seen corresponding path program 8 times [2021-01-06 16:50:47,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:47,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586276694] [2021-01-06 16:50:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:47,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586276694] [2021-01-06 16:50:47,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421263709] [2021-01-06 16:50:47,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:47,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:50:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:50:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:48,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:48,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-01-06 16:50:48,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644022998] [2021-01-06 16:50:48,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:50:48,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:48,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:50:48,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:50:48,184 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 29 states. [2021-01-06 16:50:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:48,829 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2021-01-06 16:50:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:50:48,829 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2021-01-06 16:50:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:48,830 INFO L225 Difference]: With dead ends: 139 [2021-01-06 16:50:48,830 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 16:50:48,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=490, Invalid=2060, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:50:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 16:50:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 43. [2021-01-06 16:50:48,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:50:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-01-06 16:50:48,843 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-01-06 16:50:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:48,843 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-01-06 16:50:48,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:50:48,843 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-01-06 16:50:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:50:48,844 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:48,844 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:49,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:49,051 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:49,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash -834045480, now seen corresponding path program 9 times [2021-01-06 16:50:49,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:49,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274686755] [2021-01-06 16:50:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:49,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274686755] [2021-01-06 16:50:49,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668444246] [2021-01-06 16:50:49,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:49,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 16:50:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:49,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:50:49,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:49,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:49,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-01-06 16:50:49,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236170940] [2021-01-06 16:50:49,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:50:49,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:49,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:50:49,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:50:49,638 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 28 states. [2021-01-06 16:50:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:50,243 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2021-01-06 16:50:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:50:50,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2021-01-06 16:50:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:50,244 INFO L225 Difference]: With dead ends: 162 [2021-01-06 16:50:50,244 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 16:50:50,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=2061, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:50:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 16:50:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 43. [2021-01-06 16:50:50,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:50:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-01-06 16:50:50,256 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-01-06 16:50:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:50,257 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-01-06 16:50:50,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:50:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-01-06 16:50:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:50:50,257 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:50,257 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:50,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:50:50,458 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:50,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1315926137, now seen corresponding path program 10 times [2021-01-06 16:50:50,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:50,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69607164] [2021-01-06 16:50:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:50,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69607164] [2021-01-06 16:50:50,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940323489] [2021-01-06 16:50:50,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:50,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:50:50,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:50:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:51,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:51,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-01-06 16:50:51,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378910519] [2021-01-06 16:50:51,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:50:51,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:51,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:50:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:50:51,050 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 27 states. [2021-01-06 16:50:51,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:51,655 INFO L93 Difference]: Finished difference Result 184 states and 197 transitions. [2021-01-06 16:50:51,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:50:51,655 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2021-01-06 16:50:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:51,656 INFO L225 Difference]: With dead ends: 184 [2021-01-06 16:50:51,657 INFO L226 Difference]: Without dead ends: 162 [2021-01-06 16:50:51,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1895, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:50:51,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-01-06 16:50:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 43. [2021-01-06 16:50:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:50:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-01-06 16:50:51,668 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 31 [2021-01-06 16:50:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:51,668 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-01-06 16:50:51,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:50:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-01-06 16:50:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 16:50:51,669 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:51,669 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:51,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:51,877 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1246732728, now seen corresponding path program 5 times [2021-01-06 16:50:51,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:51,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375194767] [2021-01-06 16:50:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375194767] [2021-01-06 16:50:52,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815660004] [2021-01-06 16:50:52,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:52,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:50:52,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:50:52,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:52,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:52,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-01-06 16:50:52,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837901168] [2021-01-06 16:50:52,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:50:52,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:52,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:50:52,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:50:52,392 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 26 states. [2021-01-06 16:50:52,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:52,900 INFO L93 Difference]: Finished difference Result 208 states and 223 transitions. [2021-01-06 16:50:52,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:50:52,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 31 [2021-01-06 16:50:52,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:52,901 INFO L225 Difference]: With dead ends: 208 [2021-01-06 16:50:52,901 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 16:50:52,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=400, Invalid=1580, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:50:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 16:50:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 45. [2021-01-06 16:50:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 16:50:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-01-06 16:50:52,916 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 31 [2021-01-06 16:50:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:52,916 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-01-06 16:50:52,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:50:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-01-06 16:50:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 16:50:52,916 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:52,916 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:53,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:50:53,117 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1761587635, now seen corresponding path program 10 times [2021-01-06 16:50:53,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:53,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423047736] [2021-01-06 16:50:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:53,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423047736] [2021-01-06 16:50:53,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827778278] [2021-01-06 16:50:53,196 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:53,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:50:53,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:53,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:50:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:53,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:53,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-06 16:50:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556555423] [2021-01-06 16:50:53,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:50:53,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:53,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:50:53,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:50:53,318 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 12 states. [2021-01-06 16:50:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:53,530 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-01-06 16:50:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:50:53,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2021-01-06 16:50:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:53,536 INFO L225 Difference]: With dead ends: 56 [2021-01-06 16:50:53,537 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 16:50:53,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:50:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 16:50:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-01-06 16:50:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 16:50:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-01-06 16:50:53,550 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 32 [2021-01-06 16:50:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:53,550 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-01-06 16:50:53,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:50:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-01-06 16:50:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:50:53,551 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:53,551 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:53,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:50:53,752 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:53,752 INFO L82 PathProgramCache]: Analyzing trace with hash -743312419, now seen corresponding path program 11 times [2021-01-06 16:50:53,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:53,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230614898] [2021-01-06 16:50:53,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:53,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230614898] [2021-01-06 16:50:53,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493125430] [2021-01-06 16:50:53,972 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:54,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:50:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:50:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:54,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:54,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-01-06 16:50:54,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494675378] [2021-01-06 16:50:54,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:50:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:50:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:50:54,499 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 35 states. [2021-01-06 16:50:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:55,075 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-01-06 16:50:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:50:55,075 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2021-01-06 16:50:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:55,075 INFO L225 Difference]: With dead ends: 103 [2021-01-06 16:50:55,076 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 16:50:55,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=517, Invalid=2033, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:50:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 16:50:55,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 49. [2021-01-06 16:50:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:50:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-01-06 16:50:55,094 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-01-06 16:50:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:55,095 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-01-06 16:50:55,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:50:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-01-06 16:50:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:50:55,095 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:55,095 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:55,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:50:55,296 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2052557284, now seen corresponding path program 11 times [2021-01-06 16:50:55,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:55,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340779993] [2021-01-06 16:50:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:55,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340779993] [2021-01-06 16:50:55,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406829110] [2021-01-06 16:50:55,505 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:55,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 16:50:55,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:55,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:50:55,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:56,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:56,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-01-06 16:50:56,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5326459] [2021-01-06 16:50:56,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:50:56,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:50:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:50:56,017 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 34 states. [2021-01-06 16:50:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:56,694 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-01-06 16:50:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:50:56,694 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 35 [2021-01-06 16:50:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:56,695 INFO L225 Difference]: With dead ends: 132 [2021-01-06 16:50:56,695 INFO L226 Difference]: Without dead ends: 107 [2021-01-06 16:50:56,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=588, Invalid=2492, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:50:56,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-01-06 16:50:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2021-01-06 16:50:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:50:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-01-06 16:50:56,712 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-01-06 16:50:56,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:56,713 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-01-06 16:50:56,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:50:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-01-06 16:50:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:50:56,713 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:56,713 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:56,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:50:56,927 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:56,927 INFO L82 PathProgramCache]: Analyzing trace with hash 399060989, now seen corresponding path program 12 times [2021-01-06 16:50:56,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:56,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366177835] [2021-01-06 16:50:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:57,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366177835] [2021-01-06 16:50:57,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749118651] [2021-01-06 16:50:57,161 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:57,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:50:57,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:50:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:50:57,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:57,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:57,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-01-06 16:50:57,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305104414] [2021-01-06 16:50:57,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:50:57,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:57,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:50:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:50:57,656 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 33 states. [2021-01-06 16:50:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:50:58,473 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-01-06 16:50:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:50:58,473 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2021-01-06 16:50:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:50:58,474 INFO L225 Difference]: With dead ends: 160 [2021-01-06 16:50:58,474 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 16:50:58,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=641, Invalid=2781, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:50:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 16:50:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 49. [2021-01-06 16:50:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:50:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-01-06 16:50:58,489 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-01-06 16:50:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:50:58,489 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-01-06 16:50:58,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:50:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-01-06 16:50:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:50:58,489 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:50:58,490 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:50:58,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:58,690 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:50:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:50:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1045875204, now seen corresponding path program 13 times [2021-01-06 16:50:58,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:50:58,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91754984] [2021-01-06 16:50:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:50:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:58,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91754984] [2021-01-06 16:50:58,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319397087] [2021-01-06 16:50:58,925 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:50:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:50:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:50:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:50:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:50:59,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:50:59,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-01-06 16:50:59,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944611668] [2021-01-06 16:50:59,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:50:59,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:50:59,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:50:59,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:50:59,382 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 32 states. [2021-01-06 16:51:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:00,228 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2021-01-06 16:51:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:51:00,228 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2021-01-06 16:51:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:00,229 INFO L225 Difference]: With dead ends: 187 [2021-01-06 16:51:00,230 INFO L226 Difference]: Without dead ends: 162 [2021-01-06 16:51:00,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=659, Invalid=2881, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:51:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-01-06 16:51:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 49. [2021-01-06 16:51:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:51:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-01-06 16:51:00,258 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-01-06 16:51:00,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:00,259 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-01-06 16:51:00,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:51:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-01-06 16:51:00,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:51:00,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:00,259 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:00,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:00,474 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:00,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:00,475 INFO L82 PathProgramCache]: Analyzing trace with hash 985723933, now seen corresponding path program 14 times [2021-01-06 16:51:00,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:00,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431525685] [2021-01-06 16:51:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:00,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431525685] [2021-01-06 16:51:00,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112272511] [2021-01-06 16:51:00,680 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:00,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:00,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:00,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:51:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 57 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:01,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:01,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-01-06 16:51:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926844108] [2021-01-06 16:51:01,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:51:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:51:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:51:01,132 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 31 states. [2021-01-06 16:51:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:01,931 INFO L93 Difference]: Finished difference Result 213 states and 227 transitions. [2021-01-06 16:51:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:51:01,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2021-01-06 16:51:01,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:01,932 INFO L225 Difference]: With dead ends: 213 [2021-01-06 16:51:01,932 INFO L226 Difference]: Without dead ends: 188 [2021-01-06 16:51:01,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=639, Invalid=2783, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:51:01,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-01-06 16:51:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 49. [2021-01-06 16:51:01,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:51:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-01-06 16:51:01,956 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-01-06 16:51:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:01,957 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-01-06 16:51:01,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:51:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-01-06 16:51:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:51:01,957 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:01,957 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:02,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:02,173 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:02,173 INFO L82 PathProgramCache]: Analyzing trace with hash -57119268, now seen corresponding path program 15 times [2021-01-06 16:51:02,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:02,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516939418] [2021-01-06 16:51:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:02,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516939418] [2021-01-06 16:51:02,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194505034] [2021-01-06 16:51:02,405 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:02,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 16:51:02,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:02,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:51:02,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:02,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:02,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-01-06 16:51:02,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829117277] [2021-01-06 16:51:02,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:51:02,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:02,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:51:02,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:51:02,848 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 30 states. [2021-01-06 16:51:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:03,570 INFO L93 Difference]: Finished difference Result 238 states and 253 transitions. [2021-01-06 16:51:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:51:03,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 35 [2021-01-06 16:51:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:03,572 INFO L225 Difference]: With dead ends: 238 [2021-01-06 16:51:03,572 INFO L226 Difference]: Without dead ends: 213 [2021-01-06 16:51:03,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=584, Invalid=2496, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:51:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-01-06 16:51:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 49. [2021-01-06 16:51:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:51:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-01-06 16:51:03,594 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 35 [2021-01-06 16:51:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:03,594 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-01-06 16:51:03,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:51:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-01-06 16:51:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 16:51:03,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:03,595 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:03,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:51:03,810 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:03,811 INFO L82 PathProgramCache]: Analyzing trace with hash 186335293, now seen corresponding path program 6 times [2021-01-06 16:51:03,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:03,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393141939] [2021-01-06 16:51:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:04,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393141939] [2021-01-06 16:51:04,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817348439] [2021-01-06 16:51:04,006 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:04,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:51:04,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:51:04,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:04,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:04,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-01-06 16:51:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930843660] [2021-01-06 16:51:04,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:51:04,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:04,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:51:04,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:51:04,389 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 29 states. [2021-01-06 16:51:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:05,063 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2021-01-06 16:51:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:51:05,063 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 35 [2021-01-06 16:51:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:05,064 INFO L225 Difference]: With dead ends: 265 [2021-01-06 16:51:05,064 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 16:51:05,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=503, Invalid=2047, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:51:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 16:51:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 51. [2021-01-06 16:51:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:51:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-01-06 16:51:05,084 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 35 [2021-01-06 16:51:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:05,085 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-01-06 16:51:05,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:51:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-01-06 16:51:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:51:05,085 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:05,085 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:05,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:05,299 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:05,299 INFO L82 PathProgramCache]: Analyzing trace with hash 611977303, now seen corresponding path program 12 times [2021-01-06 16:51:05,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:05,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8884660] [2021-01-06 16:51:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:05,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8884660] [2021-01-06 16:51:05,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302277710] [2021-01-06 16:51:05,386 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:05,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:51:05,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:05,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:05,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:05,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:05,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-06 16:51:05,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585017530] [2021-01-06 16:51:05,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:51:05,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:51:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:51:05,509 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 13 states. [2021-01-06 16:51:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:05,730 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-01-06 16:51:05,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:51:05,737 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2021-01-06 16:51:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:05,737 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:51:05,737 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 16:51:05,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:51:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 16:51:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-01-06 16:51:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 16:51:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-01-06 16:51:05,760 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 36 [2021-01-06 16:51:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:05,760 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-01-06 16:51:05,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:51:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-01-06 16:51:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:51:05,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:05,761 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:05,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:51:05,976 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash -715494727, now seen corresponding path program 13 times [2021-01-06 16:51:05,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:05,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680442530] [2021-01-06 16:51:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:06,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680442530] [2021-01-06 16:51:06,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869919107] [2021-01-06 16:51:06,229 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:06,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:06,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:06,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:06,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-01-06 16:51:06,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399841418] [2021-01-06 16:51:06,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:51:06,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:51:06,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1194, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:51:06,819 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 39 states. [2021-01-06 16:51:07,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:07,537 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-01-06 16:51:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:51:07,537 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2021-01-06 16:51:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:07,538 INFO L225 Difference]: With dead ends: 116 [2021-01-06 16:51:07,538 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 16:51:07,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=634, Invalid=2558, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:51:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 16:51:07,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2021-01-06 16:51:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:51:07,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-01-06 16:51:07,564 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-01-06 16:51:07,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:07,564 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-01-06 16:51:07,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:51:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-01-06 16:51:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:51:07,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:07,565 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:07,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:07,773 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:07,773 INFO L82 PathProgramCache]: Analyzing trace with hash -944261768, now seen corresponding path program 16 times [2021-01-06 16:51:07,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:07,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388436636] [2021-01-06 16:51:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:08,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388436636] [2021-01-06 16:51:08,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235603578] [2021-01-06 16:51:08,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:08,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:08,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:08,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:08,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:08,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2021-01-06 16:51:08,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307326324] [2021-01-06 16:51:08,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:51:08,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:08,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:51:08,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1142, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:08,653 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 38 states. [2021-01-06 16:51:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:09,473 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2021-01-06 16:51:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:51:09,473 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 39 [2021-01-06 16:51:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:09,474 INFO L225 Difference]: With dead ends: 149 [2021-01-06 16:51:09,474 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 16:51:09,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=732, Invalid=3174, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:51:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 16:51:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 55. [2021-01-06 16:51:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:51:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-01-06 16:51:09,498 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-01-06 16:51:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:09,498 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-01-06 16:51:09,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:51:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-01-06 16:51:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:51:09,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:09,499 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:09,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:51:09,699 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash -2060020007, now seen corresponding path program 17 times [2021-01-06 16:51:09,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:09,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86100600] [2021-01-06 16:51:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86100600] [2021-01-06 16:51:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549749882] [2021-01-06 16:51:09,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:10,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 16:51:10,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:10,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:10,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:10,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-01-06 16:51:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540888711] [2021-01-06 16:51:10,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:51:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:10,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:51:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:51:10,473 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 37 states. [2021-01-06 16:51:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:11,412 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2021-01-06 16:51:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:51:11,412 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2021-01-06 16:51:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:11,413 INFO L225 Difference]: With dead ends: 181 [2021-01-06 16:51:11,413 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 16:51:11,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=813, Invalid=3609, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:51:11,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 16:51:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 55. [2021-01-06 16:51:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:51:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-01-06 16:51:11,432 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-01-06 16:51:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:11,432 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-01-06 16:51:11,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:51:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-01-06 16:51:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:51:11,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:11,432 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:11,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:51:11,633 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1818917544, now seen corresponding path program 18 times [2021-01-06 16:51:11,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:11,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505597928] [2021-01-06 16:51:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:11,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505597928] [2021-01-06 16:51:11,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612518639] [2021-01-06 16:51:11,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:11,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 16:51:11,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:12,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:12,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-01-06 16:51:12,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638015404] [2021-01-06 16:51:12,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:51:12,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:12,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:51:12,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:51:12,403 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 36 states. [2021-01-06 16:51:13,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:13,375 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2021-01-06 16:51:13,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:51:13,375 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2021-01-06 16:51:13,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:13,376 INFO L225 Difference]: With dead ends: 212 [2021-01-06 16:51:13,376 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 16:51:13,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=856, Invalid=3836, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:51:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 16:51:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 55. [2021-01-06 16:51:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:51:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-01-06 16:51:13,407 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-01-06 16:51:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:13,407 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-01-06 16:51:13,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:51:13,407 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-01-06 16:51:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:51:13,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:13,408 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:13,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:51:13,622 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:13,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:13,623 INFO L82 PathProgramCache]: Analyzing trace with hash 544164601, now seen corresponding path program 19 times [2021-01-06 16:51:13,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:13,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191737363] [2021-01-06 16:51:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191737363] [2021-01-06 16:51:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612164085] [2021-01-06 16:51:13,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:13,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 77 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:14,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:14,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 35 [2021-01-06 16:51:14,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712370275] [2021-01-06 16:51:14,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:51:14,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:14,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:51:14,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:51:14,404 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 35 states. [2021-01-06 16:51:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:15,438 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2021-01-06 16:51:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:51:15,438 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2021-01-06 16:51:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:15,439 INFO L225 Difference]: With dead ends: 242 [2021-01-06 16:51:15,439 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 16:51:15,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=855, Invalid=3837, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:51:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 16:51:15,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 55. [2021-01-06 16:51:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:51:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-01-06 16:51:15,461 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-01-06 16:51:15,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:15,461 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-01-06 16:51:15,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:51:15,461 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-01-06 16:51:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:51:15,462 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:15,462 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:15,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:51:15,664 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash -765080264, now seen corresponding path program 20 times [2021-01-06 16:51:15,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:15,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863958664] [2021-01-06 16:51:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 58 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:15,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863958664] [2021-01-06 16:51:15,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525790528] [2021-01-06 16:51:15,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:15,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 77 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:16,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:16,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 34 [2021-01-06 16:51:16,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529753344] [2021-01-06 16:51:16,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:51:16,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:16,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:51:16,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:51:16,401 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 34 states. [2021-01-06 16:51:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:17,393 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2021-01-06 16:51:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:51:17,393 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 39 [2021-01-06 16:51:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:17,394 INFO L225 Difference]: With dead ends: 271 [2021-01-06 16:51:17,394 INFO L226 Difference]: Without dead ends: 243 [2021-01-06 16:51:17,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=810, Invalid=3612, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:51:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-01-06 16:51:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 55. [2021-01-06 16:51:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:51:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-01-06 16:51:17,427 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-01-06 16:51:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:17,433 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-01-06 16:51:17,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:51:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-01-06 16:51:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:51:17,433 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:17,434 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:17,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:17,649 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:17,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1686538009, now seen corresponding path program 21 times [2021-01-06 16:51:17,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:17,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688286214] [2021-01-06 16:51:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:17,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688286214] [2021-01-06 16:51:17,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602292530] [2021-01-06 16:51:17,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:17,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 16:51:17,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:17,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:17,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:18,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:18,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2021-01-06 16:51:18,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27965710] [2021-01-06 16:51:18,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:51:18,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:18,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:51:18,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:51:18,344 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 33 states. [2021-01-06 16:51:19,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:19,387 INFO L93 Difference]: Finished difference Result 299 states and 316 transitions. [2021-01-06 16:51:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:51:19,387 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 39 [2021-01-06 16:51:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:19,388 INFO L225 Difference]: With dead ends: 299 [2021-01-06 16:51:19,388 INFO L226 Difference]: Without dead ends: 271 [2021-01-06 16:51:19,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=727, Invalid=3179, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:51:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-01-06 16:51:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 55. [2021-01-06 16:51:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 16:51:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-01-06 16:51:19,424 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 39 [2021-01-06 16:51:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:19,424 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-01-06 16:51:19,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:51:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-01-06 16:51:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 16:51:19,425 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:19,425 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:19,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 16:51:19,639 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash 241601816, now seen corresponding path program 7 times [2021-01-06 16:51:19,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:19,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735559677] [2021-01-06 16:51:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:19,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735559677] [2021-01-06 16:51:19,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513855017] [2021-01-06 16:51:19,885 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:51:19,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:20,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:20,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 32 [2021-01-06 16:51:20,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446794810] [2021-01-06 16:51:20,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:51:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:51:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:51:20,312 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 32 states. [2021-01-06 16:51:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:21,127 INFO L93 Difference]: Finished difference Result 329 states and 348 transitions. [2021-01-06 16:51:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:51:21,127 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2021-01-06 16:51:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:21,129 INFO L225 Difference]: With dead ends: 329 [2021-01-06 16:51:21,129 INFO L226 Difference]: Without dead ends: 301 [2021-01-06 16:51:21,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=2574, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:51:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-01-06 16:51:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2021-01-06 16:51:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:51:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-01-06 16:51:21,171 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 39 [2021-01-06 16:51:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:21,171 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-01-06 16:51:21,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:51:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-01-06 16:51:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 16:51:21,172 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:21,172 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:21,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:21,386 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:21,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1565543885, now seen corresponding path program 14 times [2021-01-06 16:51:21,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:21,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134609544] [2021-01-06 16:51:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:21,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134609544] [2021-01-06 16:51:21,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232416682] [2021-01-06 16:51:21,484 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:21,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:21,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:21,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:21,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:21,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-06 16:51:21,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597812349] [2021-01-06 16:51:21,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:51:21,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:21,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:51:21,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:51:21,619 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 14 states. [2021-01-06 16:51:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:21,897 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-01-06 16:51:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:51:21,898 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2021-01-06 16:51:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:21,898 INFO L225 Difference]: With dead ends: 68 [2021-01-06 16:51:21,898 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:51:21,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:51:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:51:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-01-06 16:51:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 16:51:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-01-06 16:51:21,930 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 40 [2021-01-06 16:51:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:21,930 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-01-06 16:51:21,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:51:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-01-06 16:51:21,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:21,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:21,930 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:22,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:22,131 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:22,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:22,132 INFO L82 PathProgramCache]: Analyzing trace with hash -63167651, now seen corresponding path program 15 times [2021-01-06 16:51:22,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:22,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518614052] [2021-01-06 16:51:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:22,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518614052] [2021-01-06 16:51:22,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439288834] [2021-01-06 16:51:22,437 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:22,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 16:51:22,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:22,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:23,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:23,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-01-06 16:51:23,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802406066] [2021-01-06 16:51:23,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:51:23,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:23,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:51:23,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:51:23,202 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 43 states. [2021-01-06 16:51:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:24,014 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-01-06 16:51:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:51:24,014 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2021-01-06 16:51:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:24,015 INFO L225 Difference]: With dead ends: 129 [2021-01-06 16:51:24,015 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 16:51:24,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=763, Invalid=3143, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:51:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 16:51:24,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-01-06 16:51:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:51:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 16:51:24,067 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-01-06 16:51:24,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:24,067 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 16:51:24,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:51:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 16:51:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:24,068 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:24,068 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:24,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 16:51:24,282 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1788348772, now seen corresponding path program 22 times [2021-01-06 16:51:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:24,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733485619] [2021-01-06 16:51:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:24,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733485619] [2021-01-06 16:51:24,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501127676] [2021-01-06 16:51:24,566 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:24,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:24,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:25,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:25,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 42 [2021-01-06 16:51:25,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071183170] [2021-01-06 16:51:25,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:51:25,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:25,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:51:25,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:51:25,261 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 42 states. [2021-01-06 16:51:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:26,133 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2021-01-06 16:51:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:51:26,133 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 43 [2021-01-06 16:51:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:26,134 INFO L225 Difference]: With dead ends: 166 [2021-01-06 16:51:26,134 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 16:51:26,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=892, Invalid=3938, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:51:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 16:51:26,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 61. [2021-01-06 16:51:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:51:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 16:51:26,180 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-01-06 16:51:26,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:26,180 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 16:51:26,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:51:26,180 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 16:51:26,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:26,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:26,181 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:26,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:51:26,387 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash -874168451, now seen corresponding path program 23 times [2021-01-06 16:51:26,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:26,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442982249] [2021-01-06 16:51:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:26,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442982249] [2021-01-06 16:51:26,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565733325] [2021-01-06 16:51:26,726 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:26,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 16:51:26,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:26,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:26,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:27,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:27,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 41 [2021-01-06 16:51:27,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985363946] [2021-01-06 16:51:27,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:51:27,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:27,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:51:27,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:51:27,453 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 41 states. [2021-01-06 16:51:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:28,580 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2021-01-06 16:51:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:51:28,580 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2021-01-06 16:51:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:28,581 INFO L225 Difference]: With dead ends: 202 [2021-01-06 16:51:28,581 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 16:51:28,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1006, Invalid=4544, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:51:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 16:51:28,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 61. [2021-01-06 16:51:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:51:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 16:51:28,628 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-01-06 16:51:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:28,628 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 16:51:28,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:51:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 16:51:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:28,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:28,629 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:28,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:51:28,844 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1675962756, now seen corresponding path program 24 times [2021-01-06 16:51:28,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:28,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402378465] [2021-01-06 16:51:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:29,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402378465] [2021-01-06 16:51:29,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892158558] [2021-01-06 16:51:29,112 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:29,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 16:51:29,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:29,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:29,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:29,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 40 [2021-01-06 16:51:29,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305507774] [2021-01-06 16:51:29,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:51:29,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:29,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:51:29,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:51:29,744 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 40 states. [2021-01-06 16:51:31,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:31,023 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2021-01-06 16:51:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:51:31,024 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2021-01-06 16:51:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:31,025 INFO L225 Difference]: With dead ends: 237 [2021-01-06 16:51:31,025 INFO L226 Difference]: Without dead ends: 206 [2021-01-06 16:51:31,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1080, Invalid=4926, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:51:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-01-06 16:51:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 61. [2021-01-06 16:51:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:51:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 16:51:31,059 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-01-06 16:51:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:31,059 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 16:51:31,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:51:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 16:51:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:31,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:31,060 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:31,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:31,261 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash -177806435, now seen corresponding path program 25 times [2021-01-06 16:51:31,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:31,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465986699] [2021-01-06 16:51:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:31,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465986699] [2021-01-06 16:51:31,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344617673] [2021-01-06 16:51:31,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:31,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:31,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 100 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:32,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:32,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 39 [2021-01-06 16:51:32,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125088303] [2021-01-06 16:51:32,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:51:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:51:32,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:51:32,203 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 39 states. [2021-01-06 16:51:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:33,399 INFO L93 Difference]: Finished difference Result 271 states and 287 transitions. [2021-01-06 16:51:33,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:51:33,399 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2021-01-06 16:51:33,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:33,400 INFO L225 Difference]: With dead ends: 271 [2021-01-06 16:51:33,400 INFO L226 Difference]: Without dead ends: 240 [2021-01-06 16:51:33,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1105, Invalid=5057, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:51:33,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-01-06 16:51:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 61. [2021-01-06 16:51:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:51:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 16:51:33,451 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-01-06 16:51:33,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:33,452 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 16:51:33,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:51:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 16:51:33,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:33,452 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:33,452 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:33,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:51:33,668 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:33,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:33,668 INFO L82 PathProgramCache]: Analyzing trace with hash -406573476, now seen corresponding path program 26 times [2021-01-06 16:51:33,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:33,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141993303] [2021-01-06 16:51:33,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:33,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141993303] [2021-01-06 16:51:33,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467213666] [2021-01-06 16:51:33,952 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:34,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:34,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:34,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 100 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:34,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:34,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 38 [2021-01-06 16:51:34,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019639038] [2021-01-06 16:51:34,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:51:34,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:34,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:51:34,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:51:34,580 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 38 states. [2021-01-06 16:51:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:35,915 INFO L93 Difference]: Finished difference Result 304 states and 321 transitions. [2021-01-06 16:51:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:51:35,916 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 43 [2021-01-06 16:51:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:35,917 INFO L225 Difference]: With dead ends: 304 [2021-01-06 16:51:35,917 INFO L226 Difference]: Without dead ends: 273 [2021-01-06 16:51:35,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1078, Invalid=4928, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:51:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-01-06 16:51:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 61. [2021-01-06 16:51:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:51:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 16:51:35,950 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-01-06 16:51:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:35,951 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 16:51:35,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:51:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 16:51:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:35,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:35,951 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:36,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:51:36,152 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1522331715, now seen corresponding path program 27 times [2021-01-06 16:51:36,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:36,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223353191] [2021-01-06 16:51:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 78 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:36,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223353191] [2021-01-06 16:51:36,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756445752] [2021-01-06 16:51:36,419 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:36,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 16:51:36,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:36,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:36,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 100 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:37,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:37,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 37 [2021-01-06 16:51:37,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804636193] [2021-01-06 16:51:37,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:51:37,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:37,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:51:37,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:51:37,020 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 37 states. [2021-01-06 16:51:38,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:38,294 INFO L93 Difference]: Finished difference Result 336 states and 354 transitions. [2021-01-06 16:51:38,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:51:38,295 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 43 [2021-01-06 16:51:38,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:38,296 INFO L225 Difference]: With dead ends: 336 [2021-01-06 16:51:38,296 INFO L226 Difference]: Without dead ends: 305 [2021-01-06 16:51:38,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1002, Invalid=4548, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:51:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-01-06 16:51:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 61. [2021-01-06 16:51:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:51:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 16:51:38,338 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-01-06 16:51:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:38,338 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 16:51:38,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:51:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 16:51:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:38,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:38,339 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:38,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:38,545 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1281229252, now seen corresponding path program 28 times [2021-01-06 16:51:38,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:38,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568277621] [2021-01-06 16:51:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:38,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568277621] [2021-01-06 16:51:38,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336576094] [2021-01-06 16:51:38,814 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:38,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:38,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:38,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:39,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:39,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 36 [2021-01-06 16:51:39,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364093651] [2021-01-06 16:51:39,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:51:39,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:39,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:51:39,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:51:39,394 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 36 states. [2021-01-06 16:51:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:40,622 INFO L93 Difference]: Finished difference Result 367 states and 386 transitions. [2021-01-06 16:51:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:51:40,622 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2021-01-06 16:51:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:40,623 INFO L225 Difference]: With dead ends: 367 [2021-01-06 16:51:40,623 INFO L226 Difference]: Without dead ends: 336 [2021-01-06 16:51:40,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=886, Invalid=3944, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:51:40,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-01-06 16:51:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 61. [2021-01-06 16:51:40,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-01-06 16:51:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-01-06 16:51:40,680 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 43 [2021-01-06 16:51:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:40,680 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-01-06 16:51:40,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:51:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-01-06 16:51:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 16:51:40,681 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:40,681 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:40,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 16:51:40,897 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:40,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1081852893, now seen corresponding path program 8 times [2021-01-06 16:51:40,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:40,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335510923] [2021-01-06 16:51:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:41,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335510923] [2021-01-06 16:51:41,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078323477] [2021-01-06 16:51:41,199 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:41,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:41,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:41,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:51:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:41,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:41,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 35 [2021-01-06 16:51:41,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434034686] [2021-01-06 16:51:41,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:51:41,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:41,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:51:41,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:51:41,756 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 35 states. [2021-01-06 16:51:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:42,893 INFO L93 Difference]: Finished difference Result 400 states and 421 transitions. [2021-01-06 16:51:42,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:51:42,894 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2021-01-06 16:51:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:42,895 INFO L225 Difference]: With dead ends: 400 [2021-01-06 16:51:42,895 INFO L226 Difference]: Without dead ends: 369 [2021-01-06 16:51:42,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=745, Invalid=3161, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:51:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-01-06 16:51:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 63. [2021-01-06 16:51:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:51:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-01-06 16:51:42,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 43 [2021-01-06 16:51:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:42,947 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-01-06 16:51:42,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:51:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-01-06 16:51:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 16:51:42,948 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:42,948 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:43,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:43,163 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:43,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:43,163 INFO L82 PathProgramCache]: Analyzing trace with hash 105717207, now seen corresponding path program 16 times [2021-01-06 16:51:43,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:43,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992405909] [2021-01-06 16:51:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:43,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992405909] [2021-01-06 16:51:43,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195454534] [2021-01-06 16:51:43,276 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:43,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:51:43,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:43,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:51:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:43,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:43,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-06 16:51:43,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986178414] [2021-01-06 16:51:43,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:51:43,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:43,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:51:43,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:51:43,415 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 15 states. [2021-01-06 16:51:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:43,745 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-01-06 16:51:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:51:43,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2021-01-06 16:51:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:43,751 INFO L225 Difference]: With dead ends: 74 [2021-01-06 16:51:43,751 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 16:51:43,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:51:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 16:51:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2021-01-06 16:51:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 16:51:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2021-01-06 16:51:43,807 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 44 [2021-01-06 16:51:43,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:43,807 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2021-01-06 16:51:43,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:51:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2021-01-06 16:51:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:51:43,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:43,808 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:44,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 16:51:44,023 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:44,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1215128889, now seen corresponding path program 17 times [2021-01-06 16:51:44,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:44,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684666637] [2021-01-06 16:51:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684666637] [2021-01-06 16:51:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299585580] [2021-01-06 16:51:44,392 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:44,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 16:51:44,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:44,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:45,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:45,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-01-06 16:51:45,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26534218] [2021-01-06 16:51:45,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:51:45,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:51:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=1746, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:51:45,318 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand 47 states. [2021-01-06 16:51:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:46,071 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2021-01-06 16:51:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:51:46,071 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2021-01-06 16:51:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:46,072 INFO L225 Difference]: With dead ends: 142 [2021-01-06 16:51:46,072 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 16:51:46,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=904, Invalid=3788, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:51:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 16:51:46,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2021-01-06 16:51:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:51:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:51:46,133 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:51:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:46,133 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:51:46,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:51:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:51:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:51:46,134 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:46,134 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:46,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 16:51:46,335 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:46,335 INFO L82 PathProgramCache]: Analyzing trace with hash -185630472, now seen corresponding path program 29 times [2021-01-06 16:51:46,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:46,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451200329] [2021-01-06 16:51:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451200329] [2021-01-06 16:51:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861453296] [2021-01-06 16:51:46,703 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:46,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 16:51:46,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:46,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:47,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:47,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-01-06 16:51:47,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875840414] [2021-01-06 16:51:47,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:51:47,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:51:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1684, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:51:47,577 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 46 states. [2021-01-06 16:51:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:48,865 INFO L93 Difference]: Finished difference Result 183 states and 197 transitions. [2021-01-06 16:51:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:51:48,865 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 47 [2021-01-06 16:51:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:48,866 INFO L225 Difference]: With dead ends: 183 [2021-01-06 16:51:48,866 INFO L226 Difference]: Without dead ends: 149 [2021-01-06 16:51:48,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1068, Invalid=4784, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:51:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-01-06 16:51:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2021-01-06 16:51:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:51:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:51:48,931 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:51:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:48,931 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:51:48,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:51:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:51:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:51:48,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:48,932 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:49,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:49,133 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1477742247, now seen corresponding path program 30 times [2021-01-06 16:51:49,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:49,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726138278] [2021-01-06 16:51:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:49,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726138278] [2021-01-06 16:51:49,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988805386] [2021-01-06 16:51:49,531 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:49,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 16:51:49,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:49,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:49,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:50,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:50,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 45 [2021-01-06 16:51:50,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176985090] [2021-01-06 16:51:50,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:51:50,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:50,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:51:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1620, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:51:50,413 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 45 states. [2021-01-06 16:51:51,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:51,809 INFO L93 Difference]: Finished difference Result 223 states and 238 transitions. [2021-01-06 16:51:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:51:51,809 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2021-01-06 16:51:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:51,810 INFO L225 Difference]: With dead ends: 223 [2021-01-06 16:51:51,810 INFO L226 Difference]: Without dead ends: 189 [2021-01-06 16:51:51,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2165 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1220, Invalid=5586, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:51:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-01-06 16:51:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 67. [2021-01-06 16:51:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:51:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:51:51,885 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:51:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:51,886 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:51:51,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:51:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:51:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:51:51,886 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:51,886 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:52,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:51:52,100 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:52,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1519423272, now seen corresponding path program 31 times [2021-01-06 16:51:52,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:52,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647331671] [2021-01-06 16:51:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:52,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647331671] [2021-01-06 16:51:52,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814435911] [2021-01-06 16:51:52,453 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:52,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:53,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:53,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2021-01-06 16:51:53,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275542793] [2021-01-06 16:51:53,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:51:53,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:53,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:51:53,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:51:53,338 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 44 states. [2021-01-06 16:51:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:55,037 INFO L93 Difference]: Finished difference Result 262 states and 278 transitions. [2021-01-06 16:51:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:51:55,037 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2021-01-06 16:51:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:55,039 INFO L225 Difference]: With dead ends: 262 [2021-01-06 16:51:55,039 INFO L226 Difference]: Without dead ends: 228 [2021-01-06 16:51:55,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2417 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1331, Invalid=6151, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:51:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-01-06 16:51:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 67. [2021-01-06 16:51:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:51:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:51:55,108 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:51:55,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:55,108 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:51:55,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:51:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:51:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:51:55,108 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:55,108 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:55,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:55,309 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:55,310 INFO L82 PathProgramCache]: Analyzing trace with hash 834536825, now seen corresponding path program 32 times [2021-01-06 16:51:55,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:55,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272814063] [2021-01-06 16:51:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:55,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272814063] [2021-01-06 16:51:55,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339741073] [2021-01-06 16:51:55,656 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:55,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:51:55,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:55,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:55,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:56,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:56,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 43 [2021-01-06 16:51:56,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65341558] [2021-01-06 16:51:56,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:51:56,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:51:56,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:51:56,454 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 43 states. [2021-01-06 16:51:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:51:58,156 INFO L93 Difference]: Finished difference Result 300 states and 317 transitions. [2021-01-06 16:51:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:51:58,157 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2021-01-06 16:51:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:51:58,158 INFO L225 Difference]: With dead ends: 300 [2021-01-06 16:51:58,158 INFO L226 Difference]: Without dead ends: 266 [2021-01-06 16:51:58,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1389, Invalid=6443, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:51:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-01-06 16:51:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 67. [2021-01-06 16:51:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:51:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:51:58,206 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:51:58,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:51:58,206 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:51:58,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:51:58,206 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:51:58,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:51:58,206 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:51:58,207 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:51:58,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 16:51:58,408 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:51:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:51:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -890644296, now seen corresponding path program 33 times [2021-01-06 16:51:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:51:58,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263441719] [2021-01-06 16:51:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:51:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:51:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 101 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:58,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263441719] [2021-01-06 16:51:58,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397678324] [2021-01-06 16:51:58,730 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:51:58,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:51:58,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:51:58,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:51:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:51:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 126 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:51:59,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:51:59,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 42 [2021-01-06 16:51:59,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660944133] [2021-01-06 16:51:59,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:51:59,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:51:59,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:51:59,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:51:59,515 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 42 states. [2021-01-06 16:52:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:01,425 INFO L93 Difference]: Finished difference Result 337 states and 355 transitions. [2021-01-06 16:52:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:52:01,425 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 47 [2021-01-06 16:52:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:01,426 INFO L225 Difference]: With dead ends: 337 [2021-01-06 16:52:01,426 INFO L226 Difference]: Without dead ends: 303 [2021-01-06 16:52:01,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1388, Invalid=6444, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:52:01,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-01-06 16:52:01,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 67. [2021-01-06 16:52:01,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:52:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:52:01,478 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:52:01,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:01,478 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:52:01,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:52:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:52:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:52:01,479 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:01,479 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:01,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:52:01,694 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash 23536025, now seen corresponding path program 34 times [2021-01-06 16:52:01,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:01,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268711651] [2021-01-06 16:52:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 101 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:02,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268711651] [2021-01-06 16:52:02,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885752728] [2021-01-06 16:52:02,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:02,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:02,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:52:02,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 126 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:02,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:02,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 41 [2021-01-06 16:52:02,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171219023] [2021-01-06 16:52:02,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:52:02,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:02,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:52:02,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1344, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:52:02,838 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 41 states. [2021-01-06 16:52:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:04,704 INFO L93 Difference]: Finished difference Result 373 states and 392 transitions. [2021-01-06 16:52:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:52:04,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 47 [2021-01-06 16:52:04,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:04,705 INFO L225 Difference]: With dead ends: 373 [2021-01-06 16:52:04,705 INFO L226 Difference]: Without dead ends: 339 [2021-01-06 16:52:04,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1328, Invalid=6154, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:52:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-01-06 16:52:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 67. [2021-01-06 16:52:04,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:52:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:52:04,764 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:52:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:04,765 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:52:04,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:52:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:52:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:52:04,765 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:04,765 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:04,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:04,966 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:04,967 INFO L82 PathProgramCache]: Analyzing trace with hash -778258280, now seen corresponding path program 35 times [2021-01-06 16:52:04,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:04,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300222100] [2021-01-06 16:52:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 101 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:05,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300222100] [2021-01-06 16:52:05,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613043065] [2021-01-06 16:52:05,342 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:05,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 16:52:05,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:05,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:52:05,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 126 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:06,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:06,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 40 [2021-01-06 16:52:06,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928000672] [2021-01-06 16:52:06,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:52:06,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:06,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:52:06,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:52:06,052 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 40 states. [2021-01-06 16:52:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:07,748 INFO L93 Difference]: Finished difference Result 408 states and 428 transitions. [2021-01-06 16:52:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:52:07,749 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2021-01-06 16:52:07,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:07,750 INFO L225 Difference]: With dead ends: 408 [2021-01-06 16:52:07,750 INFO L226 Difference]: Without dead ends: 374 [2021-01-06 16:52:07,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1215, Invalid=5591, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:52:07,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-01-06 16:52:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 67. [2021-01-06 16:52:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:52:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:52:07,808 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:52:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:07,808 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:52:07,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:52:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:52:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:52:07,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:07,809 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:08,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:08,009 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:08,010 INFO L82 PathProgramCache]: Analyzing trace with hash 719898041, now seen corresponding path program 36 times [2021-01-06 16:52:08,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:08,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906006980] [2021-01-06 16:52:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 101 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:08,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906006980] [2021-01-06 16:52:08,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205272352] [2021-01-06 16:52:08,387 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:08,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 16:52:08,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:08,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:52:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 126 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:09,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:09,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 39 [2021-01-06 16:52:09,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731939973] [2021-01-06 16:52:09,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:52:09,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:52:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1194, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:52:09,084 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 39 states. [2021-01-06 16:52:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:10,665 INFO L93 Difference]: Finished difference Result 442 states and 463 transitions. [2021-01-06 16:52:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:52:10,666 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2021-01-06 16:52:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:10,667 INFO L225 Difference]: With dead ends: 442 [2021-01-06 16:52:10,667 INFO L226 Difference]: Without dead ends: 408 [2021-01-06 16:52:10,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1061, Invalid=4791, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:52:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-01-06 16:52:10,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 67. [2021-01-06 16:52:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:52:10,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-01-06 16:52:10,719 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 47 [2021-01-06 16:52:10,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:10,720 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-01-06 16:52:10,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:52:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-01-06 16:52:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 16:52:10,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:10,720 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:10,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:10,921 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash 491131000, now seen corresponding path program 9 times [2021-01-06 16:52:10,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:10,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732977630] [2021-01-06 16:52:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:11,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732977630] [2021-01-06 16:52:11,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932722010] [2021-01-06 16:52:11,277 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:11,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:52:11,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:11,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:52:11,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:11,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:11,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 38 [2021-01-06 16:52:11,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030961323] [2021-01-06 16:52:11,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:52:11,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:11,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:52:11,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:52:11,956 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 38 states. [2021-01-06 16:52:13,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:13,359 INFO L93 Difference]: Finished difference Result 478 states and 501 transitions. [2021-01-06 16:52:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:52:13,359 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 47 [2021-01-06 16:52:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:13,361 INFO L225 Difference]: With dead ends: 478 [2021-01-06 16:52:13,361 INFO L226 Difference]: Without dead ends: 444 [2021-01-06 16:52:13,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=884, Invalid=3808, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:52:13,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-01-06 16:52:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 69. [2021-01-06 16:52:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 16:52:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2021-01-06 16:52:13,419 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 47 [2021-01-06 16:52:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:13,419 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2021-01-06 16:52:13,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:52:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2021-01-06 16:52:13,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:52:13,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:13,420 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:13,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:13,629 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:13,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1809280333, now seen corresponding path program 18 times [2021-01-06 16:52:13,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:13,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798343352] [2021-01-06 16:52:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:13,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798343352] [2021-01-06 16:52:13,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771621406] [2021-01-06 16:52:13,792 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:13,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 16:52:13,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:52:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:13,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:13,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-01-06 16:52:13,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185940737] [2021-01-06 16:52:13,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:52:13,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:13,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:52:13,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:52:13,958 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 16 states. [2021-01-06 16:52:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:14,395 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2021-01-06 16:52:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:52:14,395 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2021-01-06 16:52:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:14,396 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:52:14,396 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 16:52:14,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:52:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 16:52:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-01-06 16:52:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:52:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-01-06 16:52:14,458 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 48 [2021-01-06 16:52:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:14,458 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-01-06 16:52:14,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:52:14,458 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-01-06 16:52:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:14,459 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:14,459 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:14,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:14,667 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:14,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:14,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1574007517, now seen corresponding path program 19 times [2021-01-06 16:52:14,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:14,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200193603] [2021-01-06 16:52:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:15,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200193603] [2021-01-06 16:52:15,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231246614] [2021-01-06 16:52:15,115 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:15,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:16,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:16,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2021-01-06 16:52:16,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123178056] [2021-01-06 16:52:16,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:52:16,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:16,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:52:16,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2061, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:52:16,208 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 51 states. [2021-01-06 16:52:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:17,359 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-01-06 16:52:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:52:17,359 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2021-01-06 16:52:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:17,360 INFO L225 Difference]: With dead ends: 155 [2021-01-06 16:52:17,360 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 16:52:17,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1057, Invalid=4493, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:52:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 16:52:17,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 73. [2021-01-06 16:52:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:17,435 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:17,435 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:17,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:52:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:17,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:17,435 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:17,435 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:17,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 16:52:17,636 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2142136548, now seen corresponding path program 37 times [2021-01-06 16:52:17,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:17,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121943403] [2021-01-06 16:52:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:18,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121943403] [2021-01-06 16:52:18,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941078324] [2021-01-06 16:52:18,060 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:18,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:18,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:19,102 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:19,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:19,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2021-01-06 16:52:19,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922432010] [2021-01-06 16:52:19,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:52:19,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:19,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:52:19,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:52:19,103 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 50 states. [2021-01-06 16:52:20,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:20,648 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2021-01-06 16:52:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:52:20,648 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 51 [2021-01-06 16:52:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:20,649 INFO L225 Difference]: With dead ends: 200 [2021-01-06 16:52:20,649 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 16:52:20,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1260, Invalid=5712, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:52:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 16:52:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 73. [2021-01-06 16:52:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:20,722 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:20,723 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:20,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:52:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:20,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:20,723 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:20,723 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:20,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:52:20,924 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2032955133, now seen corresponding path program 38 times [2021-01-06 16:52:20,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:20,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422345815] [2021-01-06 16:52:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:21,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422345815] [2021-01-06 16:52:21,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673629259] [2021-01-06 16:52:21,414 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:21,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:21,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:21,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:22,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:22,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2021-01-06 16:52:22,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530018988] [2021-01-06 16:52:22,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:52:22,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:52:22,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:52:22,518 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 49 states. [2021-01-06 16:52:24,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:24,443 INFO L93 Difference]: Finished difference Result 244 states and 260 transitions. [2021-01-06 16:52:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:52:24,444 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2021-01-06 16:52:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:24,444 INFO L225 Difference]: With dead ends: 244 [2021-01-06 16:52:24,445 INFO L226 Difference]: Without dead ends: 207 [2021-01-06 16:52:24,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1455, Invalid=6735, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:52:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-01-06 16:52:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 73. [2021-01-06 16:52:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:24,526 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:24,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:24,526 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:24,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:52:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:24,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:24,527 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:24,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:24,742 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:24,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash 227972860, now seen corresponding path program 39 times [2021-01-06 16:52:24,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:24,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465731085] [2021-01-06 16:52:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:25,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465731085] [2021-01-06 16:52:25,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607866141] [2021-01-06 16:52:25,173 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:25,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 16:52:25,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:25,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:25,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:26,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:26,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 48 [2021-01-06 16:52:26,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625850131] [2021-01-06 16:52:26,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:52:26,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:52:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1854, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:52:26,170 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 48 states. [2021-01-06 16:52:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:28,241 INFO L93 Difference]: Finished difference Result 287 states and 304 transitions. [2021-01-06 16:52:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:52:28,241 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 51 [2021-01-06 16:52:28,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:28,242 INFO L225 Difference]: With dead ends: 287 [2021-01-06 16:52:28,242 INFO L226 Difference]: Without dead ends: 250 [2021-01-06 16:52:28,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1609, Invalid=7511, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:52:28,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-01-06 16:52:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 73. [2021-01-06 16:52:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:28,316 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:28,316 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:28,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:52:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:28,317 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:28,317 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:28,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 16:52:28,518 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:28,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:28,518 INFO L82 PathProgramCache]: Analyzing trace with hash -245894371, now seen corresponding path program 40 times [2021-01-06 16:52:28,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:28,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403000432] [2021-01-06 16:52:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:28,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403000432] [2021-01-06 16:52:28,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855464154] [2021-01-06 16:52:28,954 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:29,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:29,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:29,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:29,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:29,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:29,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 47 [2021-01-06 16:52:29,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628168764] [2021-01-06 16:52:29,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:52:29,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:52:29,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:52:29,903 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 47 states. [2021-01-06 16:52:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:32,243 INFO L93 Difference]: Finished difference Result 329 states and 347 transitions. [2021-01-06 16:52:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:52:32,244 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 51 [2021-01-06 16:52:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:32,245 INFO L225 Difference]: With dead ends: 329 [2021-01-06 16:52:32,245 INFO L226 Difference]: Without dead ends: 292 [2021-01-06 16:52:32,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1707, Invalid=7995, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 16:52:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-01-06 16:52:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 73. [2021-01-06 16:52:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:32,331 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:32,331 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:32,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:52:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:32,331 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:32,331 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:32,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 16:52:32,532 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1646653732, now seen corresponding path program 41 times [2021-01-06 16:52:32,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:32,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447919582] [2021-01-06 16:52:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 127 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:32,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447919582] [2021-01-06 16:52:32,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927608844] [2021-01-06 16:52:32,944 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:33,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 16:52:33,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 155 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:33,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:33,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 46 [2021-01-06 16:52:33,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763464542] [2021-01-06 16:52:33,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:52:33,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:33,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:52:33,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1706, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:52:33,912 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 46 states. [2021-01-06 16:52:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:36,292 INFO L93 Difference]: Finished difference Result 370 states and 389 transitions. [2021-01-06 16:52:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:52:36,292 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 51 [2021-01-06 16:52:36,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:36,293 INFO L225 Difference]: With dead ends: 370 [2021-01-06 16:52:36,293 INFO L226 Difference]: Without dead ends: 333 [2021-01-06 16:52:36,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1740, Invalid=8160, Unknown=0, NotChecked=0, Total=9900 [2021-01-06 16:52:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-01-06 16:52:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 73. [2021-01-06 16:52:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:36,370 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:36,370 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:36,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:52:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:36,371 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:36,371 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:36,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-01-06 16:52:36,580 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1356201789, now seen corresponding path program 42 times [2021-01-06 16:52:36,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:36,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824852409] [2021-01-06 16:52:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 127 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:37,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824852409] [2021-01-06 16:52:37,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501454840] [2021-01-06 16:52:37,020 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:37,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 16:52:37,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:37,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 155 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:37,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:37,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 45 [2021-01-06 16:52:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991684732] [2021-01-06 16:52:37,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:52:37,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:37,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:52:37,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:52:37,971 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 45 states. [2021-01-06 16:52:40,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:40,300 INFO L93 Difference]: Finished difference Result 410 states and 430 transitions. [2021-01-06 16:52:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:52:40,301 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 51 [2021-01-06 16:52:40,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:40,302 INFO L225 Difference]: With dead ends: 410 [2021-01-06 16:52:40,302 INFO L226 Difference]: Without dead ends: 373 [2021-01-06 16:52:40,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3250 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1705, Invalid=7997, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 16:52:40,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-01-06 16:52:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 73. [2021-01-06 16:52:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:40,378 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:40,378 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:40,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:52:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:40,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:40,379 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:40,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:40,579 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1314520764, now seen corresponding path program 43 times [2021-01-06 16:52:40,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:40,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583494069] [2021-01-06 16:52:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 127 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:41,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583494069] [2021-01-06 16:52:41,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648687822] [2021-01-06 16:52:41,043 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:41,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:41,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 155 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:41,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:41,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 44 [2021-01-06 16:52:41,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090413420] [2021-01-06 16:52:41,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:52:41,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:41,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:52:41,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1550, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:52:41,972 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 44 states. [2021-01-06 16:52:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:44,403 INFO L93 Difference]: Finished difference Result 449 states and 470 transitions. [2021-01-06 16:52:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:52:44,403 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2021-01-06 16:52:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:44,404 INFO L225 Difference]: With dead ends: 449 [2021-01-06 16:52:44,405 INFO L226 Difference]: Without dead ends: 412 [2021-01-06 16:52:44,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1605, Invalid=7515, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 16:52:44,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-01-06 16:52:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 73. [2021-01-06 16:52:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:44,506 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:44,506 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:44,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:52:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:44,507 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:44,507 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:44,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:44,718 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:44,718 INFO L82 PathProgramCache]: Analyzing trace with hash -626486435, now seen corresponding path program 44 times [2021-01-06 16:52:44,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:44,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118986519] [2021-01-06 16:52:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 127 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:45,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118986519] [2021-01-06 16:52:45,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431294161] [2021-01-06 16:52:45,178 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:45,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:45,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:45,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:45,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 155 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:46,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:46,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 43 [2021-01-06 16:52:46,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465799998] [2021-01-06 16:52:46,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:52:46,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:46,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:52:46,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:52:46,025 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 43 states. [2021-01-06 16:52:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:48,317 INFO L93 Difference]: Finished difference Result 487 states and 509 transitions. [2021-01-06 16:52:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:52:48,317 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2021-01-06 16:52:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:48,318 INFO L225 Difference]: With dead ends: 487 [2021-01-06 16:52:48,318 INFO L226 Difference]: Without dead ends: 450 [2021-01-06 16:52:48,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1449, Invalid=6741, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:52:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-01-06 16:52:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 73. [2021-01-06 16:52:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:48,397 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:48,397 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:48,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:52:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:48,398 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:48,398 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:48,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:48,599 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1943299740, now seen corresponding path program 45 times [2021-01-06 16:52:48,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:48,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082496374] [2021-01-06 16:52:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 127 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:49,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082496374] [2021-01-06 16:52:49,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201197394] [2021-01-06 16:52:49,069 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:49,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 16:52:49,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 155 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:49,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:49,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 42 [2021-01-06 16:52:49,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454434241] [2021-01-06 16:52:49,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:52:49,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:52:49,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:52:49,925 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 42 states. [2021-01-06 16:52:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:52,116 INFO L93 Difference]: Finished difference Result 524 states and 547 transitions. [2021-01-06 16:52:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:52:52,116 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 51 [2021-01-06 16:52:52,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:52,118 INFO L225 Difference]: With dead ends: 524 [2021-01-06 16:52:52,118 INFO L226 Difference]: Without dead ends: 487 [2021-01-06 16:52:52,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1252, Invalid=5720, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:52:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-01-06 16:52:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 73. [2021-01-06 16:52:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 16:52:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-01-06 16:52:52,212 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 51 [2021-01-06 16:52:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:52,212 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-01-06 16:52:52,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:52:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-01-06 16:52:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 16:52:52,212 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:52,212 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:52,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-06 16:52:52,413 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1437487235, now seen corresponding path program 10 times [2021-01-06 16:52:52,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:52,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298306886] [2021-01-06 16:52:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:52,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298306886] [2021-01-06 16:52:52,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574025662] [2021-01-06 16:52:52,884 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:52,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:52:52,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:52,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:52:52,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:53,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:53,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 41 [2021-01-06 16:52:53,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688860327] [2021-01-06 16:52:53,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:52:53,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:52:53,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1301, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:52:53,684 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 41 states. [2021-01-06 16:52:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:55,831 INFO L93 Difference]: Finished difference Result 563 states and 588 transitions. [2021-01-06 16:52:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:52:55,831 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 51 [2021-01-06 16:52:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:55,833 INFO L225 Difference]: With dead ends: 563 [2021-01-06 16:52:55,833 INFO L226 Difference]: Without dead ends: 526 [2021-01-06 16:52:55,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1035, Invalid=4515, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:52:55,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-01-06 16:52:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 75. [2021-01-06 16:52:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:52:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-01-06 16:52:55,973 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 51 [2021-01-06 16:52:55,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:55,973 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-01-06 16:52:55,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:52:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-01-06 16:52:55,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 16:52:55,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:55,974 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:56,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:56,175 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:56,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:56,175 INFO L82 PathProgramCache]: Analyzing trace with hash -723168425, now seen corresponding path program 20 times [2021-01-06 16:52:56,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:56,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366752372] [2021-01-06 16:52:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366752372] [2021-01-06 16:52:56,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864790162] [2021-01-06 16:52:56,360 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:56,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:52:56,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:56,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:52:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:56,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:56,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-06 16:52:56,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540818038] [2021-01-06 16:52:56,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:52:56,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:56,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:52:56,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:52:56,540 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 17 states. [2021-01-06 16:52:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:52:57,079 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-01-06 16:52:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:52:57,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2021-01-06 16:52:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:52:57,080 INFO L225 Difference]: With dead ends: 86 [2021-01-06 16:52:57,080 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 16:52:57,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:52:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 16:52:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-01-06 16:52:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 16:52:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-01-06 16:52:57,165 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 52 [2021-01-06 16:52:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:52:57,166 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-01-06 16:52:57,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:52:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-01-06 16:52:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:52:57,166 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:52:57,166 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:52:57,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:57,368 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:52:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:52:57,368 INFO L82 PathProgramCache]: Analyzing trace with hash -349749319, now seen corresponding path program 21 times [2021-01-06 16:52:57,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:52:57,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064705411] [2021-01-06 16:52:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:52:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:52:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064705411] [2021-01-06 16:52:57,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605282797] [2021-01-06 16:52:57,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:52:58,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 16:52:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:52:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:52:58,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:52:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:52:59,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:52:59,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 55 [2021-01-06 16:52:59,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368203599] [2021-01-06 16:52:59,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:52:59,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:52:59,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:52:59,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=568, Invalid=2402, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:52:59,375 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 55 states. [2021-01-06 16:53:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:00,771 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2021-01-06 16:53:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:53:00,771 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2021-01-06 16:53:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:00,772 INFO L225 Difference]: With dead ends: 168 [2021-01-06 16:53:00,772 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 16:53:00,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1222, Invalid=5258, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:53:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 16:53:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2021-01-06 16:53:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:00,868 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:00,868 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:00,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:53:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:00,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:00,868 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:01,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 16:53:01,069 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:01,070 INFO L82 PathProgramCache]: Analyzing trace with hash -865260424, now seen corresponding path program 46 times [2021-01-06 16:53:01,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:01,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117376390] [2021-01-06 16:53:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:01,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117376390] [2021-01-06 16:53:01,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381067513] [2021-01-06 16:53:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:01,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:01,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:01,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:03,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:03,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2021-01-06 16:53:03,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107165463] [2021-01-06 16:53:03,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:53:03,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:03,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:53:03,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=2330, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:53:03,028 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 54 states. [2021-01-06 16:53:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:04,974 INFO L93 Difference]: Finished difference Result 217 states and 233 transitions. [2021-01-06 16:53:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:53:04,974 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 55 [2021-01-06 16:53:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:04,974 INFO L225 Difference]: With dead ends: 217 [2021-01-06 16:53:04,975 INFO L226 Difference]: Without dead ends: 177 [2021-01-06 16:53:04,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1468, Invalid=6722, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:53:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-01-06 16:53:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 79. [2021-01-06 16:53:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:05,090 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:05,090 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:05,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:53:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:05,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:05,091 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:05,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 16:53:05,292 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1436079143, now seen corresponding path program 47 times [2021-01-06 16:53:05,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:05,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232944280] [2021-01-06 16:53:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:05,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232944280] [2021-01-06 16:53:05,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801321498] [2021-01-06 16:53:05,916 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:05,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:53:05,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:07,240 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:07,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:07,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2021-01-06 16:53:07,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721956841] [2021-01-06 16:53:07,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:53:07,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:07,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:53:07,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:53:07,241 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 53 states. [2021-01-06 16:53:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:09,617 INFO L93 Difference]: Finished difference Result 265 states and 282 transitions. [2021-01-06 16:53:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:53:09,618 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 55 [2021-01-06 16:53:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:09,618 INFO L225 Difference]: With dead ends: 265 [2021-01-06 16:53:09,619 INFO L226 Difference]: Without dead ends: 225 [2021-01-06 16:53:09,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3186 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1711, Invalid=7991, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 16:53:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-01-06 16:53:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 79. [2021-01-06 16:53:09,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:09,746 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:09,746 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:09,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:53:09,746 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:09,747 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:09,747 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:09,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:09,947 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash 762264664, now seen corresponding path program 48 times [2021-01-06 16:53:09,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:09,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245392538] [2021-01-06 16:53:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245392538] [2021-01-06 16:53:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539653558] [2021-01-06 16:53:10,501 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:10,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-01-06 16:53:10,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:11,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:11,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 52 [2021-01-06 16:53:11,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302472317] [2021-01-06 16:53:11,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:53:11,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:53:11,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=2180, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:53:11,794 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 52 states. [2021-01-06 16:53:14,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:14,396 INFO L93 Difference]: Finished difference Result 312 states and 330 transitions. [2021-01-06 16:53:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:53:14,397 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 55 [2021-01-06 16:53:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:14,398 INFO L225 Difference]: With dead ends: 312 [2021-01-06 16:53:14,398 INFO L226 Difference]: Without dead ends: 272 [2021-01-06 16:53:14,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1914, Invalid=9006, Unknown=0, NotChecked=0, Total=10920 [2021-01-06 16:53:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-01-06 16:53:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 79. [2021-01-06 16:53:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:14,511 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:14,511 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:14,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:53:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:14,511 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:14,512 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:14,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:14,712 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:14,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:14,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1525915641, now seen corresponding path program 49 times [2021-01-06 16:53:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:14,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942702666] [2021-01-06 16:53:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:15,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942702666] [2021-01-06 16:53:15,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528846582] [2021-01-06 16:53:15,276 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:15,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:15,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:16,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:16,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 51 [2021-01-06 16:53:16,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332696917] [2021-01-06 16:53:16,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:53:16,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:53:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2102, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:53:16,567 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 51 states. [2021-01-06 16:53:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:19,695 INFO L93 Difference]: Finished difference Result 358 states and 377 transitions. [2021-01-06 16:53:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:53:19,695 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 55 [2021-01-06 16:53:19,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:19,697 INFO L225 Difference]: With dead ends: 358 [2021-01-06 16:53:19,697 INFO L226 Difference]: Without dead ends: 318 [2021-01-06 16:53:19,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2059, Invalid=9713, Unknown=0, NotChecked=0, Total=11772 [2021-01-06 16:53:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-01-06 16:53:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 79. [2021-01-06 16:53:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:19,813 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:19,813 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:19,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:53:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:19,813 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:19,813 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:20,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:20,014 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2104738872, now seen corresponding path program 50 times [2021-01-06 16:53:20,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:20,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130722296] [2021-01-06 16:53:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:20,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130722296] [2021-01-06 16:53:20,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107742719] [2021-01-06 16:53:20,566 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:20,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:53:20,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:20,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:20,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:21,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:21,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 50 [2021-01-06 16:53:21,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015837882] [2021-01-06 16:53:21,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:53:21,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:53:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2022, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:53:21,756 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 50 states. [2021-01-06 16:53:24,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:24,902 INFO L93 Difference]: Finished difference Result 403 states and 423 transitions. [2021-01-06 16:53:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:53:24,902 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 55 [2021-01-06 16:53:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:24,903 INFO L225 Difference]: With dead ends: 403 [2021-01-06 16:53:24,903 INFO L226 Difference]: Without dead ends: 363 [2021-01-06 16:53:24,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2134, Invalid=10076, Unknown=0, NotChecked=0, Total=12210 [2021-01-06 16:53:24,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-01-06 16:53:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 79. [2021-01-06 16:53:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:25,014 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:25,014 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:25,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:53:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:25,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:25,014 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:25,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:25,215 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:25,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1984863257, now seen corresponding path program 51 times [2021-01-06 16:53:25,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:25,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127818236] [2021-01-06 16:53:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 156 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:25,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127818236] [2021-01-06 16:53:25,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712108010] [2021-01-06 16:53:25,778 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:25,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 16:53:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:25,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 187 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:26,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:26,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 49 [2021-01-06 16:53:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010380818] [2021-01-06 16:53:26,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:53:26,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:53:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1940, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:53:26,997 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 49 states. [2021-01-06 16:53:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:30,392 INFO L93 Difference]: Finished difference Result 447 states and 468 transitions. [2021-01-06 16:53:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:53:30,392 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 55 [2021-01-06 16:53:30,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:30,394 INFO L225 Difference]: With dead ends: 447 [2021-01-06 16:53:30,394 INFO L226 Difference]: Without dead ends: 407 [2021-01-06 16:53:30,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4180 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2133, Invalid=10077, Unknown=0, NotChecked=0, Total=12210 [2021-01-06 16:53:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-01-06 16:53:30,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 79. [2021-01-06 16:53:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:30,515 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:30,515 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:30,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:53:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:30,516 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:30,516 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:30,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:30,725 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:30,726 INFO L82 PathProgramCache]: Analyzing trace with hash 179880984, now seen corresponding path program 52 times [2021-01-06 16:53:30,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:30,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600840754] [2021-01-06 16:53:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 156 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:31,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600840754] [2021-01-06 16:53:31,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286287981] [2021-01-06 16:53:31,299 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:31,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:31,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:31,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:31,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 187 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:32,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:32,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 48 [2021-01-06 16:53:32,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484812221] [2021-01-06 16:53:32,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:53:32,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:32,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:53:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=1856, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:53:32,524 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 48 states. [2021-01-06 16:53:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:35,888 INFO L93 Difference]: Finished difference Result 490 states and 512 transitions. [2021-01-06 16:53:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:53:35,888 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2021-01-06 16:53:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:35,889 INFO L225 Difference]: With dead ends: 490 [2021-01-06 16:53:35,889 INFO L226 Difference]: Without dead ends: 450 [2021-01-06 16:53:35,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4022 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2056, Invalid=9716, Unknown=0, NotChecked=0, Total=11772 [2021-01-06 16:53:35,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-01-06 16:53:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 79. [2021-01-06 16:53:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:36,020 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:36,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:36,020 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:36,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:53:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:36,021 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:36,021 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:36,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-01-06 16:53:36,232 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:36,232 INFO L82 PathProgramCache]: Analyzing trace with hash -293986247, now seen corresponding path program 53 times [2021-01-06 16:53:36,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:36,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339561908] [2021-01-06 16:53:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 156 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:36,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339561908] [2021-01-06 16:53:36,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701084108] [2021-01-06 16:53:36,823 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:36,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:53:36,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:36,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:36,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 187 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:37,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:37,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 47 [2021-01-06 16:53:37,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039799267] [2021-01-06 16:53:37,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:53:37,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:53:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:53:37,951 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 47 states. [2021-01-06 16:53:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:41,333 INFO L93 Difference]: Finished difference Result 532 states and 555 transitions. [2021-01-06 16:53:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:53:41,333 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 55 [2021-01-06 16:53:41,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:41,335 INFO L225 Difference]: With dead ends: 532 [2021-01-06 16:53:41,335 INFO L226 Difference]: Without dead ends: 492 [2021-01-06 16:53:41,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3693 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1909, Invalid=9011, Unknown=0, NotChecked=0, Total=10920 [2021-01-06 16:53:41,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-01-06 16:53:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 79. [2021-01-06 16:53:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:41,461 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:41,461 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:41,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:53:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:41,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:41,462 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:41,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:41,662 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:41,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:41,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1694745608, now seen corresponding path program 54 times [2021-01-06 16:53:41,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:41,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013851024] [2021-01-06 16:53:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 156 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013851024] [2021-01-06 16:53:42,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916883878] [2021-01-06 16:53:42,265 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:42,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-01-06 16:53:42,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:42,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 187 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:43,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:43,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 46 [2021-01-06 16:53:43,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764911668] [2021-01-06 16:53:43,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:53:43,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:43,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:53:43,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1682, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:53:43,439 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 46 states. [2021-01-06 16:53:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:46,678 INFO L93 Difference]: Finished difference Result 573 states and 597 transitions. [2021-01-06 16:53:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:53:46,678 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 55 [2021-01-06 16:53:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:46,679 INFO L225 Difference]: With dead ends: 573 [2021-01-06 16:53:46,679 INFO L226 Difference]: Without dead ends: 533 [2021-01-06 16:53:46,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3207 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1704, Invalid=7998, Unknown=0, NotChecked=0, Total=9702 [2021-01-06 16:53:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-01-06 16:53:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 79. [2021-01-06 16:53:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:46,797 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:46,797 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:46,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:53:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:46,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:46,798 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:47,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-01-06 16:53:47,004 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1308109913, now seen corresponding path program 55 times [2021-01-06 16:53:47,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:47,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541582323] [2021-01-06 16:53:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 156 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:47,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541582323] [2021-01-06 16:53:47,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227168049] [2021-01-06 16:53:47,602 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:47,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 187 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:48,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:48,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2021-01-06 16:53:48,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721565756] [2021-01-06 16:53:48,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:53:48,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:53:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1592, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:53:48,766 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 45 states. [2021-01-06 16:53:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:51,837 INFO L93 Difference]: Finished difference Result 613 states and 638 transitions. [2021-01-06 16:53:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:53:51,837 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 55 [2021-01-06 16:53:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:51,839 INFO L225 Difference]: With dead ends: 613 [2021-01-06 16:53:51,839 INFO L226 Difference]: Without dead ends: 573 [2021-01-06 16:53:51,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1459, Invalid=6731, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:53:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-01-06 16:53:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 79. [2021-01-06 16:53:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 16:53:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-01-06 16:53:51,963 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 55 [2021-01-06 16:53:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:51,963 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-01-06 16:53:51,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:53:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-01-06 16:53:51,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 16:53:51,963 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:51,963 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:52,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-06 16:53:52,164 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:52,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1266428888, now seen corresponding path program 11 times [2021-01-06 16:53:52,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:52,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651683411] [2021-01-06 16:53:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651683411] [2021-01-06 16:53:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172307668] [2021-01-06 16:53:52,776 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:52,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:53:52,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:52,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:53:52,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:53,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:53,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 44 [2021-01-06 16:53:53,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157725580] [2021-01-06 16:53:53,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:53:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:53:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1500, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:53:53,795 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 44 states. [2021-01-06 16:53:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:56,631 INFO L93 Difference]: Finished difference Result 655 states and 682 transitions. [2021-01-06 16:53:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:53:56,631 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 55 [2021-01-06 16:53:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:56,633 INFO L225 Difference]: With dead ends: 655 [2021-01-06 16:53:56,633 INFO L226 Difference]: Without dead ends: 615 [2021-01-06 16:53:56,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1198, Invalid=5282, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:53:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-01-06 16:53:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 81. [2021-01-06 16:53:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 16:53:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2021-01-06 16:53:56,761 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 55 [2021-01-06 16:53:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:56,761 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2021-01-06 16:53:56,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:53:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2021-01-06 16:53:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 16:53:56,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:56,761 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:56,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:56,962 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash -66956493, now seen corresponding path program 22 times [2021-01-06 16:53:56,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:56,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052401485] [2021-01-06 16:53:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:57,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052401485] [2021-01-06 16:53:57,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889205627] [2021-01-06 16:53:57,202 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:57,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:53:57,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:57,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:53:57,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:53:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:57,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:53:57,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-06 16:53:57,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958333099] [2021-01-06 16:53:57,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:53:57,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:53:57,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:53:57,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:53:57,407 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 18 states. [2021-01-06 16:53:58,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:53:58,132 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2021-01-06 16:53:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:53:58,133 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2021-01-06 16:53:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:53:58,134 INFO L225 Difference]: With dead ends: 92 [2021-01-06 16:53:58,134 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:53:58,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:53:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:53:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-01-06 16:53:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 16:53:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2021-01-06 16:53:58,268 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 56 [2021-01-06 16:53:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:53:58,269 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2021-01-06 16:53:58,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:53:58,269 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2021-01-06 16:53:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:53:58,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:53:58,269 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:53:58,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:58,470 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:53:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:53:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1831214499, now seen corresponding path program 23 times [2021-01-06 16:53:58,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:53:58,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070301186] [2021-01-06 16:53:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:53:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:53:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:53:59,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070301186] [2021-01-06 16:53:59,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347837767] [2021-01-06 16:53:59,203 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:53:59,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:53:59,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:53:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:53:59,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:01,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:01,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 59 [2021-01-06 16:54:01,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211393846] [2021-01-06 16:54:01,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:54:01,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:01,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:54:01,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2769, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:54:01,008 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand 59 states. [2021-01-06 16:54:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:02,921 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2021-01-06 16:54:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:54:02,921 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2021-01-06 16:54:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:02,922 INFO L225 Difference]: With dead ends: 181 [2021-01-06 16:54:02,922 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 16:54:02,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1399, Invalid=6083, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:54:02,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 16:54:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2021-01-06 16:54:03,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:54:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-01-06 16:54:03,079 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-01-06 16:54:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:03,079 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-01-06 16:54:03,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:54:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-01-06 16:54:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:54:03,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:03,080 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:03,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:03,281 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1372411804, now seen corresponding path program 56 times [2021-01-06 16:54:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:03,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125059695] [2021-01-06 16:54:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:04,010 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 188 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:04,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125059695] [2021-01-06 16:54:04,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669426932] [2021-01-06 16:54:04,010 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:04,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:54:04,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:54:04,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 222 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:05,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:05,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 58 [2021-01-06 16:54:05,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437845720] [2021-01-06 16:54:05,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:54:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:54:05,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2692, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:54:05,784 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 58 states. [2021-01-06 16:54:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:08,742 INFO L93 Difference]: Finished difference Result 234 states and 251 transitions. [2021-01-06 16:54:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:54:08,742 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 59 [2021-01-06 16:54:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:08,743 INFO L225 Difference]: With dead ends: 234 [2021-01-06 16:54:08,743 INFO L226 Difference]: Without dead ends: 191 [2021-01-06 16:54:08,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1692, Invalid=7814, Unknown=0, NotChecked=0, Total=9506 [2021-01-06 16:54:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-01-06 16:54:08,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 85. [2021-01-06 16:54:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:54:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-01-06 16:54:08,910 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-01-06 16:54:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:08,910 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-01-06 16:54:08,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:54:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-01-06 16:54:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:54:08,911 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:08,911 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:09,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:09,111 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1710834051, now seen corresponding path program 57 times [2021-01-06 16:54:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:09,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428827715] [2021-01-06 16:54:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 188 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:09,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428827715] [2021-01-06 16:54:09,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565140830] [2021-01-06 16:54:09,872 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:09,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 16:54:09,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:09,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:54:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 222 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:11,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:11,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2021-01-06 16:54:11,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774899060] [2021-01-06 16:54:11,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:54:11,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:11,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:54:11,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=2613, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:54:11,608 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 57 states. [2021-01-06 16:54:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:15,003 INFO L93 Difference]: Finished difference Result 286 states and 304 transitions. [2021-01-06 16:54:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:54:15,003 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 59 [2021-01-06 16:54:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:15,004 INFO L225 Difference]: With dead ends: 286 [2021-01-06 16:54:15,004 INFO L226 Difference]: Without dead ends: 243 [2021-01-06 16:54:15,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3770 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1988, Invalid=9354, Unknown=0, NotChecked=0, Total=11342 [2021-01-06 16:54:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-01-06 16:54:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 85. [2021-01-06 16:54:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:54:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-01-06 16:54:15,171 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-01-06 16:54:15,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:15,171 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-01-06 16:54:15,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:54:15,171 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-01-06 16:54:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:54:15,171 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:15,171 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:15,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:15,372 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1099200380, now seen corresponding path program 58 times [2021-01-06 16:54:15,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:15,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997115160] [2021-01-06 16:54:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 188 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:16,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997115160] [2021-01-06 16:54:16,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840228786] [2021-01-06 16:54:16,133 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:16,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:54:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:54:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 222 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:17,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:17,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 56 [2021-01-06 16:54:17,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748468158] [2021-01-06 16:54:17,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:54:17,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:54:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:54:17,865 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 56 states. [2021-01-06 16:54:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:21,961 INFO L93 Difference]: Finished difference Result 337 states and 356 transitions. [2021-01-06 16:54:21,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 16:54:21,962 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 59 [2021-01-06 16:54:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:21,963 INFO L225 Difference]: With dead ends: 337 [2021-01-06 16:54:21,963 INFO L226 Difference]: Without dead ends: 294 [2021-01-06 16:54:21,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2246, Invalid=10636, Unknown=0, NotChecked=0, Total=12882 [2021-01-06 16:54:21,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-01-06 16:54:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2021-01-06 16:54:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:54:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-01-06 16:54:22,223 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-01-06 16:54:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:22,223 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-01-06 16:54:22,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:54:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-01-06 16:54:22,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:54:22,223 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:22,224 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:22,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:22,432 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:22,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:22,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1996741987, now seen corresponding path program 59 times [2021-01-06 16:54:22,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:22,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36188468] [2021-01-06 16:54:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:23,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36188468] [2021-01-06 16:54:23,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300300324] [2021-01-06 16:54:23,219 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:23,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-01-06 16:54:23,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:23,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:54:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:25,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:25,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 55 [2021-01-06 16:54:25,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490655400] [2021-01-06 16:54:25,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:54:25,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:54:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=2449, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:54:25,010 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 55 states. [2021-01-06 16:54:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:54:29,262 INFO L93 Difference]: Finished difference Result 387 states and 407 transitions. [2021-01-06 16:54:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:54:29,262 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 59 [2021-01-06 16:54:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:54:29,263 INFO L225 Difference]: With dead ends: 387 [2021-01-06 16:54:29,263 INFO L226 Difference]: Without dead ends: 344 [2021-01-06 16:54:29,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4816 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2445, Invalid=11597, Unknown=0, NotChecked=0, Total=14042 [2021-01-06 16:54:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-01-06 16:54:29,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 85. [2021-01-06 16:54:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:54:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2021-01-06 16:54:29,437 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 59 [2021-01-06 16:54:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:54:29,437 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2021-01-06 16:54:29,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:54:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2021-01-06 16:54:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 16:54:29,438 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:54:29,438 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:54:29,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:29,653 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:54:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:54:29,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1782714204, now seen corresponding path program 60 times [2021-01-06 16:54:29,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:54:29,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88687272] [2021-01-06 16:54:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:54:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:54:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 188 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:30,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88687272] [2021-01-06 16:54:30,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167995793] [2021-01-06 16:54:30,439 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:54:30,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:54:30,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:54:30,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:54:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:54:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 222 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:54:32,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:54:32,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2021-01-06 16:54:32,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451050404] [2021-01-06 16:54:32,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:54:32,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:54:32,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:54:32,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=2364, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:54:32,181 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 54 states.