/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/float-benchs/Muller_Kahan.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:06:09,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:06:09,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:06:09,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:06:09,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:06:09,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:06:09,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:06:09,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:06:09,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:06:09,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:06:09,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:06:09,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:06:09,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:06:09,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:06:09,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:06:09,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:06:09,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:06:09,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:06:09,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:06:09,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:06:09,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:06:09,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:06:09,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:06:09,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:06:09,391 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:06:09,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:06:09,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:06:09,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:06:09,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:06:09,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:06:09,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:06:09,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:06:09,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:06:09,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:06:09,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:06:09,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:06:09,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:06:09,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:06:09,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:06:09,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:06:09,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:06:09,436 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:06:09,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:06:09,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:06:09,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:06:09,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:06:09,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:06:09,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:06:09,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:06:09,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:06:09,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:06:09,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:06:09,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:06:09,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:06:09,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:06:09,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:06:09,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:06:09,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:06:09,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:06:09,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:06:09,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:06:09,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:06:09,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:06:09,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:06:09,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:06:09,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:06:09,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:06:09,908 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:06:09,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/Muller_Kahan.c [2020-12-23 06:06:10,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82c29b059/02c4733a31cc4b26813914909e13e586/FLAG0ef264e00 [2020-12-23 06:06:10,614 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:06:10,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/Muller_Kahan.c [2020-12-23 06:06:10,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82c29b059/02c4733a31cc4b26813914909e13e586/FLAG0ef264e00 [2020-12-23 06:06:11,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/82c29b059/02c4733a31cc4b26813914909e13e586 [2020-12-23 06:06:11,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:06:11,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:06:11,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:06:11,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:06:11,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:06:11,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65de3f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11, skipping insertion in model container [2020-12-23 06:06:11,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:06:11,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:06:11,198 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/float-benchs/Muller_Kahan.c[631,644] left hand side expression in assignment: lhs: VariableLHS[~x0~0,] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~x0~0,] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] [2020-12-23 06:06:11,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:06:11,229 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:06:11,240 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/float-benchs/Muller_Kahan.c[631,644] left hand side expression in assignment: lhs: VariableLHS[~x0~0,] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x2~0,] left hand side expression in assignment: lhs: VariableLHS[~x0~0,] left hand side expression in assignment: lhs: VariableLHS[~x1~0,] [2020-12-23 06:06:11,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:06:11,270 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:06:11,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11 WrapperNode [2020-12-23 06:06:11,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:06:11,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:06:11,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:06:11,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:06:11,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:06:11,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:06:11,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:06:11,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:06:11,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... [2020-12-23 06:06:11,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:06:11,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:06:11,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:06:11,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:06:11,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:06:11,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:06:11,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:06:11,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:06:11,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:06:11,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:06:11,708 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:06:11,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:11 BoogieIcfgContainer [2020-12-23 06:06:11,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:06:11,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:06:11,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:06:11,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:06:11,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:06:11" (1/3) ... [2020-12-23 06:06:11,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e78c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:06:11, skipping insertion in model container [2020-12-23 06:06:11,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:11" (2/3) ... [2020-12-23 06:06:11,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e78c8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:06:11, skipping insertion in model container [2020-12-23 06:06:11,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:11" (3/3) ... [2020-12-23 06:06:11,727 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2020-12-23 06:06:11,747 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:06:11,756 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:06:11,810 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:06:11,883 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:06:11,884 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:06:11,884 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:06:11,884 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:06:11,884 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:06:11,884 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:06:11,885 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:06:11,885 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:06:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:06:11,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:06:11,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:11,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:06:11,917 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:11,927 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-12-23 06:06:11,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:11,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385254818] [2020-12-23 06:06:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:12,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385254818] [2020-12-23 06:06:12,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:06:12,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:06:12,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724167391] [2020-12-23 06:06:12,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:06:12,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:12,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:06:12,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:06:12,249 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-23 06:06:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:12,300 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 06:06:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:06:12,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:06:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:12,334 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:06:12,334 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:06:12,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:06:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:06:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-23 06:06:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:06:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:06:12,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-23 06:06:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:12,382 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:06:12,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:06:12,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:06:12,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:06:12,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:12,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:12,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:06:12,386 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-12-23 06:06:12,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:12,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591082670] [2020-12-23 06:06:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:12,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591082670] [2020-12-23 06:06:12,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434587685] [2020-12-23 06:06:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:06:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:12,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:12,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:06:12,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114558331] [2020-12-23 06:06:12,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:06:12,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:12,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:06:12,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:06:12,626 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-23 06:06:12,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:12,645 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 06:06:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:06:12,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 06:06:12,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:12,647 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:06:12,647 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:06:12,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:06:12,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:06:12,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-23 06:06:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:06:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 06:06:12,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-23 06:06:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:12,652 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 06:06:12,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:06:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 06:06:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:06:12,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:12,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:12,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:06:12,869 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:12,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-12-23 06:06:12,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:12,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973873910] [2020-12-23 06:06:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:12,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973873910] [2020-12-23 06:06:12,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390197359] [2020-12-23 06:06:12,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:13,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:13,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:06:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:13,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:13,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:06:13,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891534717] [2020-12-23 06:06:13,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:06:13,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:13,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:06:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:06:13,054 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-23 06:06:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:13,076 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 06:06:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:06:13,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 06:06:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:13,077 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:06:13,078 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:06:13,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:06:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:06:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-23 06:06:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:06:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 06:06:13,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-23 06:06:13,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:13,082 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 06:06:13,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:06:13,083 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 06:06:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:06:13,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:13,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:13,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:13,297 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-12-23 06:06:13,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:13,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021272345] [2020-12-23 06:06:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:13,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021272345] [2020-12-23 06:06:13,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221380100] [2020-12-23 06:06:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:13,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:06:13,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:06:13,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:13,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:13,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:06:13,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532790481] [2020-12-23 06:06:13,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:06:13,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:06:13,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:06:13,503 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-12-23 06:06:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:13,530 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-23 06:06:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:06:13,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 06:06:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:13,531 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:06:13,532 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:06:13,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:06:13,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:06:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-23 06:06:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:06:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 06:06:13,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-23 06:06:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:13,537 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 06:06:13,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:06:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 06:06:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:06:13,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:13,538 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:13,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:13,753 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:13,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2020-12-23 06:06:13,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:13,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980710993] [2020-12-23 06:06:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:13,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980710993] [2020-12-23 06:06:13,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95915299] [2020-12-23 06:06:13,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:13,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:13,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:06:13,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:13,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:13,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:06:13,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892066291] [2020-12-23 06:06:13,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:06:13,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:13,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:06:13,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:06:13,957 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-12-23 06:06:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:14,046 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 06:06:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:06:14,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 06:06:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:14,048 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:06:14,048 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:06:14,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:06:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:06:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 06:06:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:06:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 06:06:14,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-23 06:06:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:14,057 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 06:06:14,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:06:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 06:06:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:06:14,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:14,063 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:14,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:14,265 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2020-12-23 06:06:14,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:14,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793663554] [2020-12-23 06:06:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:14,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793663554] [2020-12-23 06:06:14,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124538117] [2020-12-23 06:06:14,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:14,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:06:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:06:14,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:14,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:14,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:06:14,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691788441] [2020-12-23 06:06:14,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:06:14,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:14,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:06:14,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:06:14,482 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-12-23 06:06:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:14,515 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 06:06:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:06:14,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 06:06:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:14,516 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:06:14,516 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:06:14,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:06:14,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:06:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-23 06:06:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:06:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 06:06:14,524 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-23 06:06:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:14,524 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 06:06:14,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:06:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 06:06:14,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:06:14,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:14,525 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:14,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:06:14,739 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2020-12-23 06:06:14,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:14,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072726447] [2020-12-23 06:06:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:14,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072726447] [2020-12-23 06:06:14,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635525768] [2020-12-23 06:06:14,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:14,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:06:14,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:14,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:06:14,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:14,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:14,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:06:14,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717810670] [2020-12-23 06:06:14,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:06:14,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:14,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:06:14,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:06:14,946 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-12-23 06:06:14,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:14,985 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 06:06:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:06:14,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 06:06:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:14,986 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:06:14,987 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:06:14,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:06:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:06:14,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 06:06:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:06:14,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 06:06:14,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-23 06:06:14,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:14,992 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 06:06:14,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:06:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 06:06:14,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:06:14,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:14,993 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:15,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:15,207 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2020-12-23 06:06:15,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:15,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527689382] [2020-12-23 06:06:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:15,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:15,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527689382] [2020-12-23 06:06:15,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739549321] [2020-12-23 06:06:15,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:06:15,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:15,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:15,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:06:15,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224669446] [2020-12-23 06:06:15,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:06:15,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:06:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:06:15,450 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-12-23 06:06:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:15,504 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 06:06:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:06:15,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-23 06:06:15,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:15,506 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:06:15,506 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:06:15,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:06:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:06:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-23 06:06:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:06:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 06:06:15,512 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-23 06:06:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:15,513 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 06:06:15,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:06:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 06:06:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:06:15,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:15,514 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:15,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:15,728 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:15,729 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2020-12-23 06:06:15,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:15,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505968846] [2020-12-23 06:06:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:15,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505968846] [2020-12-23 06:06:15,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980658949] [2020-12-23 06:06:15,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:15,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:15,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:06:15,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:15,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:15,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:06:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87396291] [2020-12-23 06:06:15,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:06:15,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:06:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:06:15,989 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-12-23 06:06:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:16,035 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-23 06:06:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:06:16,036 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-23 06:06:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:16,037 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:06:16,037 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:06:16,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:06:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:06:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-23 06:06:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:06:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-23 06:06:16,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-23 06:06:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:16,043 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-23 06:06:16,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:06:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-23 06:06:16,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:06:16,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:16,044 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:16,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:06:16,259 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2020-12-23 06:06:16,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:16,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638719251] [2020-12-23 06:06:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:16,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638719251] [2020-12-23 06:06:16,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975441756] [2020-12-23 06:06:16,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:16,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:06:16,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:16,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:06:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:16,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:16,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:06:16,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615812807] [2020-12-23 06:06:16,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:06:16,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:16,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:06:16,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:06:16,546 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-12-23 06:06:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:16,602 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-23 06:06:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:06:16,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 06:06:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:16,604 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:06:16,604 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:06:16,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:06:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:06:16,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 06:06:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:06:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 06:06:16,609 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-23 06:06:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:16,610 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 06:06:16,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:06:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 06:06:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:06:16,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:16,611 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:16,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:16,814 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2020-12-23 06:06:16,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:16,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275839196] [2020-12-23 06:06:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:16,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275839196] [2020-12-23 06:06:16,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75110405] [2020-12-23 06:06:16,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:17,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:17,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:17,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:06:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:17,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:17,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:06:17,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867999342] [2020-12-23 06:06:17,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:06:17,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:17,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:06:17,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:06:17,110 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-12-23 06:06:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:17,154 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 06:06:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:06:17,155 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-23 06:06:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:17,156 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:06:17,156 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:06:17,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:06:17,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:06:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 06:06:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:06:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 06:06:17,161 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-23 06:06:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:17,162 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 06:06:17,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:06:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 06:06:17,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:06:17,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:17,163 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:17,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:17,377 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2020-12-23 06:06:17,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:17,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110536124] [2020-12-23 06:06:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:17,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110536124] [2020-12-23 06:06:17,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870759138] [2020-12-23 06:06:17,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:17,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:06:17,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:06:17,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:17,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:17,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:06:17,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584760149] [2020-12-23 06:06:17,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:06:17,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:17,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:06:17,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:06:17,652 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-12-23 06:06:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:17,708 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-23 06:06:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:06:17,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-23 06:06:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:17,709 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:06:17,709 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:06:17,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:06:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:06:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-23 06:06:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:06:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-23 06:06:17,714 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-23 06:06:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:17,715 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-23 06:06:17,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:06:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-23 06:06:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:06:17,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:17,716 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:17,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:06:17,932 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2020-12-23 06:06:17,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:17,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498776191] [2020-12-23 06:06:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:18,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498776191] [2020-12-23 06:06:18,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118225120] [2020-12-23 06:06:18,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:18,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:06:18,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:06:18,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:18,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:18,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:06:18,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334478234] [2020-12-23 06:06:18,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:06:18,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:06:18,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:06:18,311 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-12-23 06:06:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:18,369 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 06:06:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:06:18,370 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-23 06:06:18,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:18,370 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:06:18,371 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:06:18,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:06:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:06:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-23 06:06:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:06:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-23 06:06:18,376 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-23 06:06:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:18,376 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-23 06:06:18,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:06:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-23 06:06:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:06:18,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:18,377 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:18,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:06:18,591 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:18,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2020-12-23 06:06:18,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:18,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008049389] [2020-12-23 06:06:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:18,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008049389] [2020-12-23 06:06:18,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655174280] [2020-12-23 06:06:18,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:18,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:06:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:18,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:18,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:06:18,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601627957] [2020-12-23 06:06:18,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:06:18,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:18,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:06:18,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:06:18,949 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-12-23 06:06:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:18,999 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-23 06:06:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:06:19,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-23 06:06:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:19,001 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:06:19,001 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:06:19,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:06:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:06:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-23 06:06:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:06:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 06:06:19,008 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-23 06:06:19,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:19,008 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 06:06:19,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:06:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 06:06:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:06:19,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:19,009 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:19,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:06:19,215 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:19,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2020-12-23 06:06:19,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:19,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62639530] [2020-12-23 06:06:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62639530] [2020-12-23 06:06:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261665417] [2020-12-23 06:06:19,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:19,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:19,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:19,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:06:19,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:19,534 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:19,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:19,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:06:19,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176463154] [2020-12-23 06:06:19,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:06:19,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:06:19,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:06:19,537 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-12-23 06:06:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:19,598 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-23 06:06:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:06:19,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-23 06:06:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:19,600 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:06:19,600 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:06:19,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:06:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:06:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-23 06:06:19,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:06:19,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-23 06:06:19,605 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-23 06:06:19,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:19,605 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-23 06:06:19,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:06:19,605 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-23 06:06:19,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:06:19,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:19,606 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:19,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:19,824 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:19,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2020-12-23 06:06:19,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:19,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216024772] [2020-12-23 06:06:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:20,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216024772] [2020-12-23 06:06:20,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451896747] [2020-12-23 06:06:20,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:20,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:06:20,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:20,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:06:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:20,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:20,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:06:20,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480788464] [2020-12-23 06:06:20,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:06:20,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:20,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:06:20,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:06:20,177 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-12-23 06:06:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:20,236 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-23 06:06:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:06:20,237 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-23 06:06:20,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:20,237 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:06:20,238 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:06:20,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:06:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:06:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-23 06:06:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:06:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-23 06:06:20,243 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-23 06:06:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:20,243 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-23 06:06:20,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:06:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-23 06:06:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:06:20,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:20,244 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:20,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:06:20,447 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:20,448 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2020-12-23 06:06:20,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:20,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021927813] [2020-12-23 06:06:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:20,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:20,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021927813] [2020-12-23 06:06:20,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196240942] [2020-12-23 06:06:20,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:20,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:06:20,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:20,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:20,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:06:20,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962901042] [2020-12-23 06:06:20,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:06:20,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:20,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:06:20,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:06:20,805 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2020-12-23 06:06:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:20,869 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-23 06:06:20,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:06:20,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-23 06:06:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:20,870 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:06:20,870 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:06:20,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:06:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:06:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 06:06:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:06:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-23 06:06:20,875 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-23 06:06:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:20,876 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-23 06:06:20,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:06:20,876 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-23 06:06:20,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:06:20,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:20,877 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:21,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:06:21,093 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:21,094 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2020-12-23 06:06:21,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:21,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615489883] [2020-12-23 06:06:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:21,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615489883] [2020-12-23 06:06:21,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483373180] [2020-12-23 06:06:21,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:21,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:06:21,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:21,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:06:21,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:21,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:21,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:06:21,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237912129] [2020-12-23 06:06:21,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:06:21,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:21,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:06:21,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:06:21,493 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-12-23 06:06:21,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:21,557 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-23 06:06:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:06:21,557 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-23 06:06:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:21,558 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:06:21,558 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:06:21,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:06:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:06:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-23 06:06:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:06:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-23 06:06:21,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-23 06:06:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:21,563 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-23 06:06:21,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:06:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-23 06:06:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:06:21,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:21,564 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:21,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:06:21,771 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:21,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2020-12-23 06:06:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:21,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858683465] [2020-12-23 06:06:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858683465] [2020-12-23 06:06:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030651802] [2020-12-23 06:06:22,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:22,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:06:22,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:22,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:06:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:22,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:22,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:06:22,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897429342] [2020-12-23 06:06:22,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:06:22,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:06:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:06:22,202 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-12-23 06:06:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:22,267 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-23 06:06:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:06:22,267 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-23 06:06:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:22,268 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:06:22,268 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:06:22,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:06:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:06:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-23 06:06:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:06:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-23 06:06:22,274 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-23 06:06:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:22,275 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-23 06:06:22,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:06:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-23 06:06:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:06:22,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:22,276 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:22,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:22,491 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:22,492 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2020-12-23 06:06:22,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:22,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887130853] [2020-12-23 06:06:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:22,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887130853] [2020-12-23 06:06:22,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262682283] [2020-12-23 06:06:22,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:22,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:06:22,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:22,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:22,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:06:22,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049856070] [2020-12-23 06:06:22,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:06:22,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:22,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:06:22,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:06:22,973 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-12-23 06:06:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:23,042 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-23 06:06:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:06:23,043 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-23 06:06:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:23,043 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:06:23,043 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:06:23,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:06:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:06:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 06:06:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:06:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-23 06:06:23,048 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-23 06:06:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:23,048 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-23 06:06:23,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:06:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-23 06:06:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:06:23,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:23,049 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:23,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:23,264 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2020-12-23 06:06:23,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:23,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539421504] [2020-12-23 06:06:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:23,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539421504] [2020-12-23 06:06:23,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934776947] [2020-12-23 06:06:23,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:23,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:23,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:06:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:23,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:23,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:06:23,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888825751] [2020-12-23 06:06:23,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:06:23,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:06:23,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:06:23,751 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-12-23 06:06:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:23,828 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-23 06:06:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:06:23,829 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-23 06:06:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:23,829 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:06:23,830 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:06:23,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:06:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:06:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-23 06:06:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:06:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-23 06:06:23,835 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-23 06:06:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:23,836 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-23 06:06:23,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:06:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-23 06:06:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:06:23,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:23,837 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:24,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:06:24,052 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2020-12-23 06:06:24,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:24,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437091524] [2020-12-23 06:06:24,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:24,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437091524] [2020-12-23 06:06:24,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520639431] [2020-12-23 06:06:24,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:24,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:06:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:06:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:24,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:24,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:06:24,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065927180] [2020-12-23 06:06:24,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:06:24,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:24,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:06:24,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:06:24,569 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-12-23 06:06:24,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:24,645 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-23 06:06:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:06:24,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-23 06:06:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:24,646 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:06:24,646 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:06:24,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:06:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:06:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-23 06:06:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:06:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-23 06:06:24,651 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-23 06:06:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:24,652 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-23 06:06:24,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:06:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-23 06:06:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:06:24,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:24,653 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:24,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:06:24,867 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:24,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2020-12-23 06:06:24,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:24,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871403493] [2020-12-23 06:06:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871403493] [2020-12-23 06:06:25,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424368872] [2020-12-23 06:06:25,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:25,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:06:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:25,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:06:25,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340069361] [2020-12-23 06:06:25,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:06:25,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:25,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:06:25,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:06:25,424 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2020-12-23 06:06:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:25,505 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-23 06:06:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:06:25,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-23 06:06:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:25,507 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:06:25,507 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:06:25,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:06:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:06:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-23 06:06:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 06:06:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-23 06:06:25,513 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-23 06:06:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:25,514 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-23 06:06:25,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:06:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-23 06:06:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:06:25,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:25,515 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:25,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:25,729 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:25,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2020-12-23 06:06:25,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:25,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88998563] [2020-12-23 06:06:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:26,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88998563] [2020-12-23 06:06:26,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582994350] [2020-12-23 06:06:26,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:26,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 06:06:26,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:06:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:26,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:26,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:06:26,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381407678] [2020-12-23 06:06:26,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:06:26,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:06:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:06:26,388 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-12-23 06:06:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:26,481 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-23 06:06:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:06:26,482 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-23 06:06:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:26,483 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:06:26,483 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:06:26,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:06:26,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:06:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-23 06:06:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:06:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-23 06:06:26,488 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-23 06:06:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:26,488 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-23 06:06:26,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:06:26,488 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-23 06:06:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:06:26,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:26,489 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:26,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:06:26,704 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2020-12-23 06:06:26,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:26,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777536360] [2020-12-23 06:06:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777536360] [2020-12-23 06:06:27,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534297075] [2020-12-23 06:06:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:27,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:06:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:06:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:27,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:06:27,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119012542] [2020-12-23 06:06:27,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:06:27,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:06:27,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:06:27,315 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-12-23 06:06:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:27,405 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-23 06:06:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:06:27,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-23 06:06:27,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:27,407 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:06:27,407 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:06:27,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:06:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:06:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-23 06:06:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 06:06:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-23 06:06:27,411 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-23 06:06:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:27,411 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-23 06:06:27,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:06:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-23 06:06:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 06:06:27,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:27,412 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:27,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:27,627 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:27,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:27,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2020-12-23 06:06:27,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:27,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151638317] [2020-12-23 06:06:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151638317] [2020-12-23 06:06:28,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955243296] [2020-12-23 06:06:28,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:06:28,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:28,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:06:28,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234350217] [2020-12-23 06:06:28,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:06:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:28,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:06:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:06:28,233 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-12-23 06:06:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:28,321 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-23 06:06:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:06:28,322 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-23 06:06:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:28,322 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:06:28,323 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:06:28,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:06:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:06:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-23 06:06:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:06:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-23 06:06:28,326 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-23 06:06:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:28,326 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-23 06:06:28,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:06:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-23 06:06:28,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:06:28,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:28,327 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:28,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:06:28,541 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2020-12-23 06:06:28,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:28,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451822657] [2020-12-23 06:06:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451822657] [2020-12-23 06:06:29,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814102307] [2020-12-23 06:06:29,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:29,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:29,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:29,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:06:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:29,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:06:29,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915048906] [2020-12-23 06:06:29,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:06:29,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:29,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:06:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:06:29,206 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-12-23 06:06:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:29,297 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-23 06:06:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:06:29,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-23 06:06:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:29,299 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:06:29,299 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:06:29,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:06:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:06:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 06:06:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:06:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-23 06:06:29,303 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-23 06:06:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:29,303 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-23 06:06:29,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:06:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-23 06:06:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 06:06:29,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:29,304 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:29,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:06:29,518 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2020-12-23 06:06:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:29,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895660032] [2020-12-23 06:06:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895660032] [2020-12-23 06:06:30,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38097141] [2020-12-23 06:06:30,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:30,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:06:30,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:30,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:06:30,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:30,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:30,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:06:30,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737368306] [2020-12-23 06:06:30,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:06:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:06:30,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:06:30,228 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-12-23 06:06:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:30,321 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-23 06:06:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:06:30,321 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-23 06:06:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:30,322 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:06:30,322 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 06:06:30,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:06:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 06:06:30,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-23 06:06:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 06:06:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-23 06:06:30,325 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-23 06:06:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:30,325 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-23 06:06:30,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:06:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-23 06:06:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:06:30,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:30,326 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:30,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:06:30,539 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:30,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2020-12-23 06:06:30,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:30,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149698435] [2020-12-23 06:06:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:31,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149698435] [2020-12-23 06:06:31,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443192458] [2020-12-23 06:06:31,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:31,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:31,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:06:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:31,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:31,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:06:31,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506414435] [2020-12-23 06:06:31,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:06:31,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:31,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:06:31,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:06:31,266 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2020-12-23 06:06:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:31,367 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-23 06:06:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:06:31,367 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-23 06:06:31,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:31,368 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:06:31,368 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:06:31,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:06:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:06:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 06:06:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 06:06:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-23 06:06:31,372 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-23 06:06:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:31,372 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-23 06:06:31,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:06:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-23 06:06:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 06:06:31,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:31,373 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:31,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:06:31,588 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:31,588 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2020-12-23 06:06:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:31,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87212580] [2020-12-23 06:06:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:32,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87212580] [2020-12-23 06:06:32,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382202406] [2020-12-23 06:06:32,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:32,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 06:06:32,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:32,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:06:32,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:32,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:32,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:06:32,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448662279] [2020-12-23 06:06:32,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:06:32,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:32,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:06:32,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:06:32,309 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-12-23 06:06:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:32,414 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-23 06:06:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:06:32,415 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-23 06:06:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:32,416 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:06:32,416 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:06:32,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:06:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:06:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 06:06:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:06:32,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-23 06:06:32,420 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-23 06:06:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:32,421 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-23 06:06:32,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:06:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-23 06:06:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:06:32,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:32,422 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:32,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:32,627 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:32,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:32,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2020-12-23 06:06:32,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:32,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286656180] [2020-12-23 06:06:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:33,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286656180] [2020-12-23 06:06:33,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217410983] [2020-12-23 06:06:33,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:33,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:06:33,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:33,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:06:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:33,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:33,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:06:33,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552988057] [2020-12-23 06:06:33,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:06:33,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:33,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:06:33,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:06:33,399 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-12-23 06:06:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:33,508 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-23 06:06:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:06:33,509 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-23 06:06:33,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:33,510 INFO L225 Difference]: With dead ends: 74 [2020-12-23 06:06:33,510 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:06:33,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:06:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:06:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-23 06:06:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 06:06:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-23 06:06:33,514 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-23 06:06:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:33,514 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-23 06:06:33,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:06:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-23 06:06:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 06:06:33,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:33,515 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:33,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:33,720 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:33,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2020-12-23 06:06:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:33,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903279891] [2020-12-23 06:06:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:34,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903279891] [2020-12-23 06:06:34,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352230526] [2020-12-23 06:06:34,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:34,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:06:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:34,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:34,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:06:34,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473136860] [2020-12-23 06:06:34,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:06:34,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:34,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:06:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:06:34,611 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-12-23 06:06:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:34,728 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-23 06:06:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:06:34,729 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-23 06:06:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:34,729 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:06:34,730 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:06:34,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:06:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:06:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-23 06:06:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 06:06:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-23 06:06:34,737 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-23 06:06:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:34,737 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-23 06:06:34,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:06:34,738 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-23 06:06:34,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 06:06:34,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:34,739 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:34,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:34,955 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:34,956 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2020-12-23 06:06:34,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:34,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338048790] [2020-12-23 06:06:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:35,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338048790] [2020-12-23 06:06:35,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438891749] [2020-12-23 06:06:35,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:35,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:35,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:35,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:06:35,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:35,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:35,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:06:35,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727394744] [2020-12-23 06:06:35,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:06:35,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:35,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:06:35,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:06:35,818 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-12-23 06:06:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:35,928 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-23 06:06:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:06:35,928 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-23 06:06:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:35,929 INFO L225 Difference]: With dead ends: 78 [2020-12-23 06:06:35,929 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 06:06:35,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:06:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 06:06:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-23 06:06:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 06:06:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-23 06:06:35,935 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-23 06:06:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:35,936 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-23 06:06:35,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:06:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-23 06:06:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 06:06:35,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:35,937 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:36,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:06:36,152 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:36,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2020-12-23 06:06:36,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:36,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020695685] [2020-12-23 06:06:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020695685] [2020-12-23 06:06:36,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310889063] [2020-12-23 06:06:36,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:36,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 06:06:36,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:36,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:06:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:37,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:37,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:06:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778707861] [2020-12-23 06:06:37,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:06:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:37,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:06:37,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:06:37,100 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-12-23 06:06:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:37,222 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-23 06:06:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:06:37,223 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-23 06:06:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:37,224 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:06:37,224 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 06:06:37,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:06:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 06:06:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-23 06:06:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 06:06:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-23 06:06:37,227 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-23 06:06:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:37,227 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-23 06:06:37,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:06:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-23 06:06:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 06:06:37,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:37,228 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:37,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:37,443 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:37,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2020-12-23 06:06:37,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:37,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962616549] [2020-12-23 06:06:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:38,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962616549] [2020-12-23 06:06:38,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276991770] [2020-12-23 06:06:38,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:38,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:38,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:38,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:06:38,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:38,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:38,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:06:38,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678677394] [2020-12-23 06:06:38,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:06:38,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:38,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:06:38,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:06:38,395 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2020-12-23 06:06:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:38,498 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-23 06:06:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:06:38,498 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-23 06:06:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:38,499 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:06:38,499 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:06:38,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:06:38,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:06:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-23 06:06:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:06:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-23 06:06:38,504 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-23 06:06:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:38,504 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-23 06:06:38,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:06:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-23 06:06:38,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:06:38,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:38,505 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:38,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:06:38,720 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:38,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:38,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2020-12-23 06:06:38,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:38,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279921355] [2020-12-23 06:06:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:39,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279921355] [2020-12-23 06:06:39,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567128973] [2020-12-23 06:06:39,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:39,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 06:06:39,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:39,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:06:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:39,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:39,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:06:39,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230729231] [2020-12-23 06:06:39,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:06:39,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:06:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:06:39,848 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-12-23 06:06:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:39,987 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-23 06:06:39,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:06:39,988 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-23 06:06:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:39,989 INFO L225 Difference]: With dead ends: 84 [2020-12-23 06:06:39,989 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 06:06:39,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:06:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 06:06:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-23 06:06:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:06:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-23 06:06:39,993 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-12-23 06:06:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:39,993 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-23 06:06:39,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:06:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-23 06:06:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 06:06:39,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:39,994 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:40,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:40,208 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:40,208 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2020-12-23 06:06:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:40,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292488915] [2020-12-23 06:06:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:41,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292488915] [2020-12-23 06:06:41,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371139654] [2020-12-23 06:06:41,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:41,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:06:41,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:06:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:41,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:41,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:06:41,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050019318] [2020-12-23 06:06:41,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:06:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:06:41,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:06:41,393 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2020-12-23 06:06:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:41,548 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-23 06:06:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:06:41,549 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-23 06:06:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:41,550 INFO L225 Difference]: With dead ends: 86 [2020-12-23 06:06:41,550 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 06:06:41,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:06:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 06:06:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-23 06:06:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 06:06:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-23 06:06:41,554 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-12-23 06:06:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:41,554 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-23 06:06:41,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:06:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-23 06:06:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 06:06:41,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:41,555 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:41,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:06:41,769 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:41,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:41,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2020-12-23 06:06:41,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:41,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712213943] [2020-12-23 06:06:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:42,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712213943] [2020-12-23 06:06:42,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714985068] [2020-12-23 06:06:42,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:42,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:06:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:42,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:42,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:06:42,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914287394] [2020-12-23 06:06:42,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:06:42,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:42,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:06:42,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:06:42,897 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-12-23 06:06:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:43,036 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-23 06:06:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:06:43,036 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-23 06:06:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:43,037 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:06:43,037 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 06:06:43,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:06:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 06:06:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-23 06:06:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 06:06:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-23 06:06:43,043 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-12-23 06:06:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:43,043 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-23 06:06:43,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:06:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-23 06:06:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 06:06:43,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:43,045 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:43,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:06:43,260 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2020-12-23 06:06:43,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:43,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732177333] [2020-12-23 06:06:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:44,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732177333] [2020-12-23 06:06:44,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000653001] [2020-12-23 06:06:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:44,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:44,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:44,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:06:44,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:44,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:44,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:06:44,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128776097] [2020-12-23 06:06:44,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:06:44,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:06:44,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:06:44,442 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-12-23 06:06:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:44,580 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-23 06:06:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:06:44,581 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-23 06:06:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:44,582 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:06:44,582 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:06:44,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:06:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:06:44,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 06:06:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:06:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-23 06:06:44,586 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-12-23 06:06:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:44,586 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-23 06:06:44,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:06:44,586 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-23 06:06:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:06:44,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:44,587 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:44,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:06:44,801 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2020-12-23 06:06:44,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:44,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474527367] [2020-12-23 06:06:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:45,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474527367] [2020-12-23 06:06:45,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065480305] [2020-12-23 06:06:45,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:45,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:06:45,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:06:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:46,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:46,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:06:46,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691087130] [2020-12-23 06:06:46,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:06:46,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:46,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:06:46,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:06:46,093 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-12-23 06:06:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:46,215 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-23 06:06:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:06:46,216 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-12-23 06:06:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:46,220 INFO L225 Difference]: With dead ends: 92 [2020-12-23 06:06:46,220 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 06:06:46,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:06:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 06:06:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 06:06:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 06:06:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-23 06:06:46,225 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-12-23 06:06:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:46,226 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-23 06:06:46,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:06:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-23 06:06:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 06:06:46,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:46,230 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:46,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:06:46,437 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2020-12-23 06:06:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:46,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769268372] [2020-12-23 06:06:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:47,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769268372] [2020-12-23 06:06:47,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086070206] [2020-12-23 06:06:47,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:47,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:47,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:06:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:47,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:47,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:06:47,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840963527] [2020-12-23 06:06:47,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:06:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:06:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:06:47,693 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2020-12-23 06:06:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:47,821 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-23 06:06:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:06:47,822 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2020-12-23 06:06:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:47,823 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:06:47,823 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 06:06:47,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:06:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 06:06:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-23 06:06:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 06:06:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-23 06:06:47,828 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-12-23 06:06:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:47,829 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-23 06:06:47,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:06:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-23 06:06:47,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 06:06:47,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:47,829 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:48,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:48,044 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:48,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:48,045 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2020-12-23 06:06:48,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:48,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800088050] [2020-12-23 06:06:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:48,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800088050] [2020-12-23 06:06:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827005348] [2020-12-23 06:06:49,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:49,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 06:06:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:06:49,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:49,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:49,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:06:49,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415791565] [2020-12-23 06:06:49,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:06:49,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:49,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:06:49,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:06:49,405 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-12-23 06:06:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:49,569 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-23 06:06:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:06:49,570 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-12-23 06:06:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:49,571 INFO L225 Difference]: With dead ends: 96 [2020-12-23 06:06:49,571 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 06:06:49,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:06:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 06:06:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-23 06:06:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 06:06:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-23 06:06:49,575 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-12-23 06:06:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:49,576 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-23 06:06:49,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:06:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-23 06:06:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:06:49,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:49,577 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:49,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 06:06:49,792 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:49,792 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2020-12-23 06:06:49,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:49,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600010503] [2020-12-23 06:06:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:50,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600010503] [2020-12-23 06:06:50,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069528233] [2020-12-23 06:06:50,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:50,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 06:06:50,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:06:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:51,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:51,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 06:06:51,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477706877] [2020-12-23 06:06:51,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:06:51,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:51,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:06:51,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:06:51,107 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2020-12-23 06:06:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:51,282 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-12-23 06:06:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:06:51,283 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2020-12-23 06:06:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:51,284 INFO L225 Difference]: With dead ends: 98 [2020-12-23 06:06:51,284 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 06:06:51,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:06:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 06:06:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-23 06:06:51,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 06:06:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-12-23 06:06:51,288 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-12-23 06:06:51,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:51,288 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-12-23 06:06:51,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:06:51,288 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-12-23 06:06:51,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 06:06:51,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:51,289 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:51,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:51,504 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2020-12-23 06:06:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:51,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136271302] [2020-12-23 06:06:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:52,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136271302] [2020-12-23 06:06:52,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955686778] [2020-12-23 06:06:52,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:06:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:53,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:53,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 06:06:53,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039075882] [2020-12-23 06:06:53,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:06:53,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:06:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:06:53,030 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2020-12-23 06:06:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:53,170 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-12-23 06:06:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:06:53,170 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-12-23 06:06:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:53,171 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:06:53,171 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 06:06:53,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:06:53,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 06:06:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-23 06:06:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 06:06:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-12-23 06:06:53,175 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-12-23 06:06:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:53,176 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-12-23 06:06:53,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:06:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-12-23 06:06:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 06:06:53,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:53,177 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:53,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:53,391 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:53,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2020-12-23 06:06:53,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:53,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689592524] [2020-12-23 06:06:53,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:54,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689592524] [2020-12-23 06:06:54,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764532318] [2020-12-23 06:06:54,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:54,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:54,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:54,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:06:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:54,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:54,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 06:06:54,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460283282] [2020-12-23 06:06:54,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:06:54,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:54,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:06:54,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:06:54,841 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2020-12-23 06:06:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:55,015 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-23 06:06:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:06:55,015 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-23 06:06:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:55,016 INFO L225 Difference]: With dead ends: 102 [2020-12-23 06:06:55,016 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 06:06:55,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:06:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 06:06:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-23 06:06:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 06:06:55,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-12-23 06:06:55,021 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-12-23 06:06:55,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:55,022 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-12-23 06:06:55,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:06:55,022 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-12-23 06:06:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 06:06:55,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:55,022 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:55,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 06:06:55,236 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2020-12-23 06:06:55,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:55,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155554152] [2020-12-23 06:06:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:56,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155554152] [2020-12-23 06:06:56,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138211270] [2020-12-23 06:06:56,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:56,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 06:06:56,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:06:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:56,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:56,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:56,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 06:06:56,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604585768] [2020-12-23 06:06:56,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:06:56,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:56,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:06:56,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:06:56,784 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2020-12-23 06:06:56,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:56,964 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-12-23 06:06:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:06:56,965 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-23 06:06:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:56,965 INFO L225 Difference]: With dead ends: 104 [2020-12-23 06:06:56,965 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 06:06:56,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:06:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 06:06:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-23 06:06:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 06:06:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-23 06:06:56,968 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-12-23 06:06:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:56,968 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-23 06:06:56,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:06:56,969 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-23 06:06:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 06:06:56,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:56,969 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:57,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:06:57,172 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:57,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:57,173 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2020-12-23 06:06:57,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:57,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768294745] [2020-12-23 06:06:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:58,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768294745] [2020-12-23 06:06:58,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695688559] [2020-12-23 06:06:58,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:58,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:58,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:06:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:58,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:58,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 06:06:58,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631319659] [2020-12-23 06:06:58,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:06:58,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:06:58,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:06:58,768 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2020-12-23 06:06:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:58,926 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-12-23 06:06:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:06:58,927 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-23 06:06:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:58,928 INFO L225 Difference]: With dead ends: 106 [2020-12-23 06:06:58,928 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 06:06:58,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:06:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 06:06:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-23 06:06:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 06:06:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-12-23 06:06:58,932 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-12-23 06:06:58,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:58,932 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-12-23 06:06:58,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:06:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-12-23 06:06:58,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 06:06:58,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:58,933 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:59,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:06:59,134 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:59,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:59,134 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2020-12-23 06:06:59,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:59,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780501026] [2020-12-23 06:06:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:00,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780501026] [2020-12-23 06:07:00,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193407854] [2020-12-23 06:07:00,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:00,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 06:07:00,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:00,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:07:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:00,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:00,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 06:07:00,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098187105] [2020-12-23 06:07:00,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:07:00,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:07:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:07:00,847 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2020-12-23 06:07:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:01,024 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-12-23 06:07:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:07:01,025 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-12-23 06:07:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:01,026 INFO L225 Difference]: With dead ends: 108 [2020-12-23 06:07:01,026 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 06:07:01,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:07:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 06:07:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-23 06:07:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 06:07:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-12-23 06:07:01,029 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-12-23 06:07:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:01,030 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-12-23 06:07:01,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:07:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-12-23 06:07:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 06:07:01,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:01,031 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:01,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:01,245 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:01,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:01,245 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2020-12-23 06:07:01,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:01,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145886264] [2020-12-23 06:07:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:02,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145886264] [2020-12-23 06:07:02,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710064968] [2020-12-23 06:07:02,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:02,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-23 06:07:02,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:02,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:07:02,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:03,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:03,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 06:07:03,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309086212] [2020-12-23 06:07:03,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:07:03,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:03,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:07:03,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:07:03,043 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2020-12-23 06:07:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:03,233 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-23 06:07:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:07:03,234 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2020-12-23 06:07:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:03,235 INFO L225 Difference]: With dead ends: 110 [2020-12-23 06:07:03,236 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 06:07:03,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:07:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 06:07:03,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-23 06:07:03,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 06:07:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-12-23 06:07:03,240 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-12-23 06:07:03,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:03,240 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-12-23 06:07:03,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:07:03,240 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-12-23 06:07:03,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 06:07:03,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:03,241 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:03,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 06:07:03,455 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:03,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:03,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2020-12-23 06:07:03,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:03,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099044924] [2020-12-23 06:07:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:05,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099044924] [2020-12-23 06:07:05,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787676211] [2020-12-23 06:07:05,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:07:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:05,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:05,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 06:07:05,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478700001] [2020-12-23 06:07:05,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 06:07:05,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:05,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 06:07:05,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:07:05,330 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2020-12-23 06:07:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:05,536 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-12-23 06:07:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:07:05,537 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2020-12-23 06:07:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:05,537 INFO L225 Difference]: With dead ends: 112 [2020-12-23 06:07:05,538 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 06:07:05,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:07:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 06:07:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-23 06:07:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 06:07:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-23 06:07:05,540 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-12-23 06:07:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:05,541 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-23 06:07:05,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 06:07:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-23 06:07:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 06:07:05,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:05,541 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:05,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:07:05,742 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:05,743 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2020-12-23 06:07:05,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:05,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937109340] [2020-12-23 06:07:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:05,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:07,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937109340] [2020-12-23 06:07:07,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098123268] [2020-12-23 06:07:07,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:07,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:07,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:07,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:07:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:07,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:07,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 06:07:07,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805326738] [2020-12-23 06:07:07,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:07:07,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:07:07,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:07:07,624 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2020-12-23 06:07:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:07,848 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-12-23 06:07:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:07:07,848 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2020-12-23 06:07:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:07,849 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:07:07,849 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 06:07:07,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:07:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 06:07:07,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-23 06:07:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 06:07:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-12-23 06:07:07,853 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-12-23 06:07:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:07,854 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-12-23 06:07:07,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:07:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-12-23 06:07:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 06:07:07,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:07,855 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:08,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:08,068 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:08,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2020-12-23 06:07:08,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:08,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175555456] [2020-12-23 06:07:08,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:09,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175555456] [2020-12-23 06:07:09,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473274281] [2020-12-23 06:07:09,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:09,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-23 06:07:09,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:07:09,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:10,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:10,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:10,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 06:07:10,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239483411] [2020-12-23 06:07:10,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:07:10,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:10,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:07:10,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:07:10,130 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2020-12-23 06:07:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:10,342 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-12-23 06:07:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:07:10,343 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2020-12-23 06:07:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:10,344 INFO L225 Difference]: With dead ends: 116 [2020-12-23 06:07:10,344 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 06:07:10,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:07:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 06:07:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-23 06:07:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 06:07:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-12-23 06:07:10,348 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-12-23 06:07:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:10,348 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-12-23 06:07:10,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:07:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-12-23 06:07:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 06:07:10,349 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:10,349 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:10,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 06:07:10,565 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:10,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2020-12-23 06:07:10,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:10,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935696171] [2020-12-23 06:07:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935696171] [2020-12-23 06:07:12,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237826039] [2020-12-23 06:07:12,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:12,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:12,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:12,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:07:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:12,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:12,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 06:07:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190367303] [2020-12-23 06:07:12,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:07:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:07:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:07:12,602 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2020-12-23 06:07:12,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:12,801 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-12-23 06:07:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:07:12,802 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-23 06:07:12,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:12,803 INFO L225 Difference]: With dead ends: 118 [2020-12-23 06:07:12,803 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 06:07:12,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:07:12,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 06:07:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-23 06:07:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 06:07:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-12-23 06:07:12,807 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-12-23 06:07:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:12,807 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-12-23 06:07:12,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:07:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-12-23 06:07:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 06:07:12,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:12,808 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:13,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:13,022 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:13,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2020-12-23 06:07:13,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:13,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198440477] [2020-12-23 06:07:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:14,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198440477] [2020-12-23 06:07:14,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941879312] [2020-12-23 06:07:14,944 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 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 [2020-12-23 06:07:15,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-23 06:07:15,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:15,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:07:15,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:15,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:15,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 06:07:15,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962279133] [2020-12-23 06:07:15,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:07:15,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:15,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:07:15,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:07:15,235 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2020-12-23 06:07:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:15,462 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-12-23 06:07:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 06:07:15,462 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-12-23 06:07:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:15,463 INFO L225 Difference]: With dead ends: 120 [2020-12-23 06:07:15,463 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 06:07:15,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:07:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 06:07:15,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-23 06:07:15,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 06:07:15,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-12-23 06:07:15,467 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-12-23 06:07:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:15,467 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-12-23 06:07:15,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:07:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-12-23 06:07:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 06:07:15,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:15,468 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:15,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 06:07:15,684 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:15,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:15,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1661404569, now seen corresponding path program 54 times [2020-12-23 06:07:15,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:15,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779584203] [2020-12-23 06:07:15,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:17,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779584203] [2020-12-23 06:07:17,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007396720] [2020-12-23 06:07:17,658 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 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 [2020-12-23 06:07:17,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 06:07:17,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:07:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:17,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:17,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 06:07:17,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484002371] [2020-12-23 06:07:17,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:07:17,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:17,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:07:17,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:07:17,976 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2020-12-23 06:07:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:18,164 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-12-23 06:07:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:07:18,165 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2020-12-23 06:07:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:18,166 INFO L225 Difference]: With dead ends: 122 [2020-12-23 06:07:18,166 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 06:07:18,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:07:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 06:07:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-23 06:07:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 06:07:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-12-23 06:07:18,170 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-12-23 06:07:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:18,170 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-12-23 06:07:18,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:07:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-12-23 06:07:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 06:07:18,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:18,171 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:18,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:07:18,385 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1064810981, now seen corresponding path program 55 times [2020-12-23 06:07:18,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:18,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150212812] [2020-12-23 06:07:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:20,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150212812] [2020-12-23 06:07:20,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533709139] [2020-12-23 06:07:20,435 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 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 [2020-12-23 06:07:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:20,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:07:20,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:20,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:20,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 06:07:20,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123740971] [2020-12-23 06:07:20,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:07:20,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:07:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:07:20,711 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2020-12-23 06:07:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:20,922 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-12-23 06:07:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:07:20,923 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2020-12-23 06:07:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:20,925 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:07:20,925 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 06:07:20,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:07:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 06:07:20,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-23 06:07:20,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 06:07:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-12-23 06:07:20,929 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-12-23 06:07:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:20,929 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-12-23 06:07:20,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:07:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-12-23 06:07:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 06:07:20,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:20,930 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:21,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:21,144 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:21,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1027903971, now seen corresponding path program 56 times [2020-12-23 06:07:21,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:21,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911713000] [2020-12-23 06:07:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:23,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911713000] [2020-12-23 06:07:23,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473445149] [2020-12-23 06:07:23,272 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 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 [2020-12-23 06:07:23,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:07:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:23,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:23,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 06:07:23,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343244997] [2020-12-23 06:07:23,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:07:23,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:23,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:07:23,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:07:23,554 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2020-12-23 06:07:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:23,752 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-12-23 06:07:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:07:23,752 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2020-12-23 06:07:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:23,753 INFO L225 Difference]: With dead ends: 126 [2020-12-23 06:07:23,753 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 06:07:23,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:07:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 06:07:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-12-23 06:07:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 06:07:23,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-12-23 06:07:23,758 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-12-23 06:07:23,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:23,758 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-12-23 06:07:23,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:07:23,758 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-12-23 06:07:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 06:07:23,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:23,759 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:23,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 06:07:23,974 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash 79994271, now seen corresponding path program 57 times [2020-12-23 06:07:23,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:23,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260761755] [2020-12-23 06:07:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:26,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260761755] [2020-12-23 06:07:26,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944442525] [2020-12-23 06:07:26,169 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 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 [2020-12-23 06:07:26,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-23 06:07:26,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:26,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:07:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:26,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:26,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 06:07:26,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864617421] [2020-12-23 06:07:26,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:07:26,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:07:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:07:26,507 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2020-12-23 06:07:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:26,745 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-12-23 06:07:26,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 06:07:26,746 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2020-12-23 06:07:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:26,747 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:07:26,747 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 06:07:26,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:07:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 06:07:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-23 06:07:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 06:07:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-12-23 06:07:26,751 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-12-23 06:07:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:26,751 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-12-23 06:07:26,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:07:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-12-23 06:07:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 06:07:26,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:26,752 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:26,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:26,965 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:26,966 INFO L82 PathProgramCache]: Analyzing trace with hash -381684575, now seen corresponding path program 58 times [2020-12-23 06:07:26,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:26,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693614676] [2020-12-23 06:07:26,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:29,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693614676] [2020-12-23 06:07:29,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580722930] [2020-12-23 06:07:29,114 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 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 [2020-12-23 06:07:29,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:07:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:29,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:29,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 06:07:29,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435715027] [2020-12-23 06:07:29,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 06:07:29,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:29,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 06:07:29,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:07:29,402 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2020-12-23 06:07:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:29,639 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-12-23 06:07:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:07:29,640 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2020-12-23 06:07:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:29,640 INFO L225 Difference]: With dead ends: 130 [2020-12-23 06:07:29,640 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 06:07:29,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:07:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 06:07:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-12-23 06:07:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 06:07:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-12-23 06:07:29,644 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-12-23 06:07:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:29,644 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-12-23 06:07:29,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 06:07:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-12-23 06:07:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 06:07:29,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:29,645 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:29,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 06:07:29,846 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:29,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1673424093, now seen corresponding path program 59 times [2020-12-23 06:07:29,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:29,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92840074] [2020-12-23 06:07:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:32,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92840074] [2020-12-23 06:07:32,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136895599] [2020-12-23 06:07:32,180 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 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 [2020-12-23 06:07:32,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-23 06:07:32,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:32,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:07:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:32,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:32,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 06:07:32,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989034248] [2020-12-23 06:07:32,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:07:32,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:32,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:07:32,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:07:32,505 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2020-12-23 06:07:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:32,789 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-12-23 06:07:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:07:32,789 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2020-12-23 06:07:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:32,790 INFO L225 Difference]: With dead ends: 132 [2020-12-23 06:07:32,790 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 06:07:32,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:07:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 06:07:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-23 06:07:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 06:07:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-12-23 06:07:32,794 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-12-23 06:07:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:32,794 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-12-23 06:07:32,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:07:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-12-23 06:07:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 06:07:32,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:32,796 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:33,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:07:33,010 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:33,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1789552347, now seen corresponding path program 60 times [2020-12-23 06:07:33,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:33,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992621240] [2020-12-23 06:07:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:35,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:35,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992621240] [2020-12-23 06:07:35,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733395678] [2020-12-23 06:07:35,438 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 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 [2020-12-23 06:07:35,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-23 06:07:35,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:07:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:35,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:35,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 06:07:35,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977720650] [2020-12-23 06:07:35,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:07:35,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:35,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:07:35,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:07:35,782 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2020-12-23 06:07:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:36,066 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-12-23 06:07:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:07:36,067 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2020-12-23 06:07:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:36,068 INFO L225 Difference]: With dead ends: 134 [2020-12-23 06:07:36,068 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 06:07:36,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:07:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 06:07:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-23 06:07:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 06:07:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-12-23 06:07:36,072 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-12-23 06:07:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:36,072 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-12-23 06:07:36,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:07:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-12-23 06:07:36,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 06:07:36,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:36,074 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:36,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:36,286 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1719654745, now seen corresponding path program 61 times [2020-12-23 06:07:36,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:36,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072656682] [2020-12-23 06:07:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:38,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072656682] [2020-12-23 06:07:38,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32712986] [2020-12-23 06:07:38,801 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 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 [2020-12-23 06:07:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:38,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:07:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:39,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:39,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-23 06:07:39,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653748744] [2020-12-23 06:07:39,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 06:07:39,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 06:07:39,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:07:39,084 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2020-12-23 06:07:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:39,324 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-12-23 06:07:39,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 06:07:39,331 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2020-12-23 06:07:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:39,331 INFO L225 Difference]: With dead ends: 136 [2020-12-23 06:07:39,332 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 06:07:39,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:07:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 06:07:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-12-23 06:07:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 06:07:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-12-23 06:07:39,339 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-12-23 06:07:39,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:39,339 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-12-23 06:07:39,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 06:07:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-12-23 06:07:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 06:07:39,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:39,348 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:39,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:39,549 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:39,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:39,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1027431337, now seen corresponding path program 62 times [2020-12-23 06:07:39,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:39,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347328006] [2020-12-23 06:07:39,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347328006] [2020-12-23 06:07:42,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703592612] [2020-12-23 06:07:42,131 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 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 [2020-12-23 06:07:42,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:42,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:07:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:42,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 06:07:42,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660019945] [2020-12-23 06:07:42,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:07:42,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:42,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:07:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:07:42,430 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2020-12-23 06:07:42,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:42,696 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-12-23 06:07:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:07:42,697 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2020-12-23 06:07:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:42,697 INFO L225 Difference]: With dead ends: 138 [2020-12-23 06:07:42,697 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 06:07:42,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:07:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 06:07:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-12-23 06:07:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 06:07:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-12-23 06:07:42,700 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-12-23 06:07:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:42,701 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-12-23 06:07:42,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:07:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-12-23 06:07:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 06:07:42,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:42,701 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:42,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:42,902 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:42,903 INFO L82 PathProgramCache]: Analyzing trace with hash -427730901, now seen corresponding path program 63 times [2020-12-23 06:07:42,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:42,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735351206] [2020-12-23 06:07:42,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735351206] [2020-12-23 06:07:45,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422740863] [2020-12-23 06:07:45,621 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 [2020-12-23 06:07:45,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-23 06:07:45,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:45,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:07:45,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:45,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 06:07:45,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896762631] [2020-12-23 06:07:45,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:07:45,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:45,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:07:45,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:07:45,984 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2020-12-23 06:07:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:46,247 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-12-23 06:07:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:07:46,248 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2020-12-23 06:07:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:46,249 INFO L225 Difference]: With dead ends: 140 [2020-12-23 06:07:46,249 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 06:07:46,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:07:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 06:07:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-12-23 06:07:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 06:07:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-12-23 06:07:46,253 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-12-23 06:07:46,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:46,254 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-12-23 06:07:46,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:07:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-12-23 06:07:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 06:07:46,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:46,255 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:46,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:46,469 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:46,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1320696877, now seen corresponding path program 64 times [2020-12-23 06:07:46,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:46,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963422020] [2020-12-23 06:07:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963422020] [2020-12-23 06:07:49,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074792679] [2020-12-23 06:07:49,248 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 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 [2020-12-23 06:07:49,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:49,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:49,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:07:49,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:49,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:49,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 06:07:49,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898661631] [2020-12-23 06:07:49,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:07:49,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:49,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:07:49,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:07:49,554 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2020-12-23 06:07:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:49,813 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-12-23 06:07:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:07:49,814 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2020-12-23 06:07:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:49,815 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:07:49,815 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 06:07:49,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:07:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 06:07:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-23 06:07:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 06:07:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-12-23 06:07:49,820 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-12-23 06:07:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:49,820 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-12-23 06:07:49,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:07:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-12-23 06:07:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 06:07:49,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:49,821 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:50,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:50,037 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2067388497, now seen corresponding path program 65 times [2020-12-23 06:07:50,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:50,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846988726] [2020-12-23 06:07:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:52,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846988726] [2020-12-23 06:07:52,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422214579] [2020-12-23 06:07:52,931 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 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 [2020-12-23 06:07:53,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 06:07:53,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:53,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:07:53,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:53,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:53,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 06:07:53,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8536441] [2020-12-23 06:07:53,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:07:53,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:07:53,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:07:53,292 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2020-12-23 06:07:53,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:53,548 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-12-23 06:07:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 06:07:53,549 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2020-12-23 06:07:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:53,550 INFO L225 Difference]: With dead ends: 144 [2020-12-23 06:07:53,550 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 06:07:53,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:07:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 06:07:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-23 06:07:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 06:07:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-12-23 06:07:53,554 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-12-23 06:07:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:53,554 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-12-23 06:07:53,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:07:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-12-23 06:07:53,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 06:07:53,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:53,555 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:53,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:07:53,770 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1862744753, now seen corresponding path program 66 times [2020-12-23 06:07:53,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:53,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417716393] [2020-12-23 06:07:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:56,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417716393] [2020-12-23 06:07:56,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126816270] [2020-12-23 06:07:56,651 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 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 [2020-12-23 06:07:56,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-23 06:07:56,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:07:56,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:57,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:57,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 06:07:57,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093959300] [2020-12-23 06:07:57,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:07:57,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:57,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:07:57,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:07:57,033 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2020-12-23 06:07:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:57,290 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-12-23 06:07:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:07:57,291 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2020-12-23 06:07:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:57,292 INFO L225 Difference]: With dead ends: 146 [2020-12-23 06:07:57,292 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 06:07:57,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:07:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 06:07:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-23 06:07:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 06:07:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-12-23 06:07:57,295 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-12-23 06:07:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:57,295 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-12-23 06:07:57,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:07:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-12-23 06:07:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 06:07:57,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:57,296 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:57,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:07:57,498 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash -850422477, now seen corresponding path program 67 times [2020-12-23 06:07:57,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:57,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91879079] [2020-12-23 06:07:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:00,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91879079] [2020-12-23 06:08:00,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181415586] [2020-12-23 06:08:00,598 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 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 [2020-12-23 06:08:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:00,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:08:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:00,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:00,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-23 06:08:00,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079678318] [2020-12-23 06:08:00,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 06:08:00,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 06:08:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:08:00,905 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2020-12-23 06:08:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:01,180 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-12-23 06:08:01,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:08:01,180 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2020-12-23 06:08:01,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:01,182 INFO L225 Difference]: With dead ends: 148 [2020-12-23 06:08:01,182 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 06:08:01,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:08:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 06:08:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-12-23 06:08:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 06:08:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-12-23 06:08:01,186 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-12-23 06:08:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:01,186 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-12-23 06:08:01,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 06:08:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-12-23 06:08:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 06:08:01,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:01,187 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:01,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:01,398 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:01,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:01,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1158981835, now seen corresponding path program 68 times [2020-12-23 06:08:01,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:01,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57396768] [2020-12-23 06:08:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57396768] [2020-12-23 06:08:04,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469452905] [2020-12-23 06:08:04,535 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 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 [2020-12-23 06:08:04,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:04,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:04,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:08:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:04,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:04,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 06:08:04,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662562778] [2020-12-23 06:08:04,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:08:04,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:04,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:08:04,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:08:04,856 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2020-12-23 06:08:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:05,158 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-12-23 06:08:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:08:05,158 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2020-12-23 06:08:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:05,159 INFO L225 Difference]: With dead ends: 150 [2020-12-23 06:08:05,159 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 06:08:05,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:08:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 06:08:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-23 06:08:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 06:08:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-12-23 06:08:05,163 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-12-23 06:08:05,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:05,163 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-12-23 06:08:05,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:08:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-12-23 06:08:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 06:08:05,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:05,164 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:05,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 06:08:05,380 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:05,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1331781449, now seen corresponding path program 69 times [2020-12-23 06:08:05,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:05,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072975514] [2020-12-23 06:08:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:08,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072975514] [2020-12-23 06:08:08,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91527270] [2020-12-23 06:08:08,622 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 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 [2020-12-23 06:08:08,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-23 06:08:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:08,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:08:08,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:09,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:09,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 06:08:09,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001329585] [2020-12-23 06:08:09,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:08:09,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:09,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:08:09,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:08:09,032 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2020-12-23 06:08:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:09,379 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-12-23 06:08:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:08:09,380 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2020-12-23 06:08:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:09,381 INFO L225 Difference]: With dead ends: 152 [2020-12-23 06:08:09,381 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 06:08:09,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:08:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 06:08:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-23 06:08:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 06:08:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-12-23 06:08:09,386 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-12-23 06:08:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:09,386 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-12-23 06:08:09,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:08:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-12-23 06:08:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 06:08:09,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:09,387 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:09,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:08:09,603 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash 111514041, now seen corresponding path program 70 times [2020-12-23 06:08:09,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:09,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608446464] [2020-12-23 06:08:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:12,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608446464] [2020-12-23 06:08:12,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396364427] [2020-12-23 06:08:12,911 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 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 [2020-12-23 06:08:13,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:13,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:08:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:13,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:13,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 06:08:13,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968087332] [2020-12-23 06:08:13,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 06:08:13,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:13,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 06:08:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:08:13,230 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2020-12-23 06:08:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:13,511 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-12-23 06:08:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:08:13,511 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2020-12-23 06:08:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:13,512 INFO L225 Difference]: With dead ends: 154 [2020-12-23 06:08:13,512 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 06:08:13,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:08:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 06:08:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-12-23 06:08:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 06:08:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-12-23 06:08:13,517 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-12-23 06:08:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:13,517 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-12-23 06:08:13,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 06:08:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-12-23 06:08:13,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 06:08:13,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:13,518 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:13,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 06:08:13,733 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:13,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash -155956677, now seen corresponding path program 71 times [2020-12-23 06:08:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:13,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389401155] [2020-12-23 06:08:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:17,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389401155] [2020-12-23 06:08:17,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134053365] [2020-12-23 06:08:17,131 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 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 [2020-12-23 06:08:17,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 06:08:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:08:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:17,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:17,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 06:08:17,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101465981] [2020-12-23 06:08:17,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 06:08:17,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:17,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 06:08:17,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:08:17,510 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2020-12-23 06:08:17,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:17,859 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-12-23 06:08:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:08:17,860 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2020-12-23 06:08:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:17,861 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:08:17,861 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 06:08:17,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:08:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 06:08:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-23 06:08:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 06:08:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-12-23 06:08:17,869 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-12-23 06:08:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:17,870 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-12-23 06:08:17,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 06:08:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-12-23 06:08:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 06:08:17,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:17,871 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:18,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:18,088 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:18,089 INFO L82 PathProgramCache]: Analyzing trace with hash 502721085, now seen corresponding path program 72 times [2020-12-23 06:08:18,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:18,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709037269] [2020-12-23 06:08:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:21,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709037269] [2020-12-23 06:08:21,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567418001] [2020-12-23 06:08:21,643 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 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 [2020-12-23 06:08:21,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-23 06:08:21,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:21,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:08:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:22,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:22,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 06:08:22,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984347364] [2020-12-23 06:08:22,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:08:22,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:08:22,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:08:22,078 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2020-12-23 06:08:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:22,381 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-12-23 06:08:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:08:22,382 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2020-12-23 06:08:22,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:22,384 INFO L225 Difference]: With dead ends: 158 [2020-12-23 06:08:22,384 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 06:08:22,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:08:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 06:08:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-23 06:08:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 06:08:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-12-23 06:08:22,389 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-12-23 06:08:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:22,389 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-12-23 06:08:22,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:08:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-12-23 06:08:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 06:08:22,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:22,390 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:22,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:22,604 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2131857855, now seen corresponding path program 73 times [2020-12-23 06:08:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:22,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667927301] [2020-12-23 06:08:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:22,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667927301] [2020-12-23 06:08:26,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397905135] [2020-12-23 06:08:26,237 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 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 [2020-12-23 06:08:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:26,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:08:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:26,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:26,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 06:08:26,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978818254] [2020-12-23 06:08:26,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 06:08:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 06:08:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:08:26,595 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2020-12-23 06:08:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:26,946 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-12-23 06:08:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 06:08:26,946 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2020-12-23 06:08:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:26,947 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:08:26,947 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 06:08:26,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:08:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 06:08:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-23 06:08:26,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 06:08:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-12-23 06:08:26,951 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-12-23 06:08:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:26,952 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-12-23 06:08:26,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 06:08:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-12-23 06:08:26,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 06:08:26,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:26,953 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:27,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:27,168 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash 69230785, now seen corresponding path program 74 times [2020-12-23 06:08:27,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:27,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579056131] [2020-12-23 06:08:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:30,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579056131] [2020-12-23 06:08:30,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219818322] [2020-12-23 06:08:30,915 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 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 [2020-12-23 06:08:31,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:31,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:08:31,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:31,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:31,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 06:08:31,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669346897] [2020-12-23 06:08:31,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 06:08:31,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:31,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 06:08:31,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:08:31,279 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2020-12-23 06:08:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:31,634 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-12-23 06:08:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:08:31,639 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2020-12-23 06:08:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:31,640 INFO L225 Difference]: With dead ends: 162 [2020-12-23 06:08:31,641 INFO L226 Difference]: Without dead ends: 158 [2020-12-23 06:08:31,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:08:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-23 06:08:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-12-23 06:08:31,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 06:08:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-12-23 06:08:31,644 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-12-23 06:08:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:31,645 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-12-23 06:08:31,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 06:08:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-12-23 06:08:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 06:08:31,645 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:31,646 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:31,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 06:08:31,847 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:31,847 INFO L82 PathProgramCache]: Analyzing trace with hash -2135460029, now seen corresponding path program 75 times [2020-12-23 06:08:31,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:31,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319196980] [2020-12-23 06:08:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:35,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319196980] [2020-12-23 06:08:35,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821461163] [2020-12-23 06:08:35,713 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 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 [2020-12-23 06:08:35,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-23 06:08:35,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:08:35,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:36,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:36,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 06:08:36,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161635043] [2020-12-23 06:08:36,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 06:08:36,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 06:08:36,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:08:36,157 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2020-12-23 06:08:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:36,499 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-12-23 06:08:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:08:36,499 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2020-12-23 06:08:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:36,500 INFO L225 Difference]: With dead ends: 164 [2020-12-23 06:08:36,500 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 06:08:36,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:08:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 06:08:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-12-23 06:08:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 06:08:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-12-23 06:08:36,504 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-12-23 06:08:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:36,504 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-12-23 06:08:36,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 06:08:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-12-23 06:08:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 06:08:36,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:36,505 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:36,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:36,706 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash 870511941, now seen corresponding path program 76 times [2020-12-23 06:08:36,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:36,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885677717] [2020-12-23 06:08:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:40,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885677717] [2020-12-23 06:08:40,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100663334] [2020-12-23 06:08:40,661 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 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 [2020-12-23 06:08:40,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:40,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:08:40,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:41,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:41,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 06:08:41,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251576741] [2020-12-23 06:08:41,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:08:41,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:41,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:08:41,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:08:41,016 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2020-12-23 06:08:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:41,373 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-12-23 06:08:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:08:41,373 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2020-12-23 06:08:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:41,374 INFO L225 Difference]: With dead ends: 166 [2020-12-23 06:08:41,374 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 06:08:41,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:08:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 06:08:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-12-23 06:08:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 06:08:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-12-23 06:08:41,379 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-12-23 06:08:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:41,379 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-12-23 06:08:41,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 06:08:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-12-23 06:08:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 06:08:41,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:41,380 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:41,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:41,586 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:41,587 INFO L82 PathProgramCache]: Analyzing trace with hash -903415097, now seen corresponding path program 77 times [2020-12-23 06:08:41,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:41,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37411009] [2020-12-23 06:08:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:45,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37411009] [2020-12-23 06:08:45,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837643132] [2020-12-23 06:08:45,672 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 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 [2020-12-23 06:08:45,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 06:08:45,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:45,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:08:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:46,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:46,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 06:08:46,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866095517] [2020-12-23 06:08:46,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 06:08:46,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 06:08:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:08:46,066 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2020-12-23 06:08:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:46,449 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-12-23 06:08:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 06:08:46,449 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2020-12-23 06:08:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:46,450 INFO L225 Difference]: With dead ends: 168 [2020-12-23 06:08:46,450 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 06:08:46,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:08:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 06:08:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-12-23 06:08:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 06:08:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-12-23 06:08:46,455 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-12-23 06:08:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:46,455 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-12-23 06:08:46,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 06:08:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-12-23 06:08:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 06:08:46,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:46,456 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:46,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 06:08:46,671 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:46,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:46,671 INFO L82 PathProgramCache]: Analyzing trace with hash -545282103, now seen corresponding path program 78 times [2020-12-23 06:08:46,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:46,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329354722] [2020-12-23 06:08:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:50,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329354722] [2020-12-23 06:08:50,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252168014] [2020-12-23 06:08:50,840 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 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 [2020-12-23 06:08:51,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-23 06:08:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:51,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 06:08:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:51,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:51,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 06:08:51,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934898497] [2020-12-23 06:08:51,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 06:08:51,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:51,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 06:08:51,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:08:51,310 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2020-12-23 06:08:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:51,730 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-12-23 06:08:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:08:51,731 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2020-12-23 06:08:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:51,732 INFO L225 Difference]: With dead ends: 170 [2020-12-23 06:08:51,732 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 06:08:51,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:08:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 06:08:51,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-12-23 06:08:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 06:08:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-12-23 06:08:51,739 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-12-23 06:08:51,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:51,739 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-12-23 06:08:51,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 06:08:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-12-23 06:08:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-23 06:08:51,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:51,741 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:51,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 06:08:51,956 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 23141451, now seen corresponding path program 79 times [2020-12-23 06:08:51,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:51,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715008352] [2020-12-23 06:08:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:56,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715008352] [2020-12-23 06:08:56,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569274562] [2020-12-23 06:08:56,272 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 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 [2020-12-23 06:08:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 06:08:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:56,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:56,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-23 06:08:56,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471965816] [2020-12-23 06:08:56,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 06:08:56,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:56,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 06:08:56,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:08:56,627 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2020-12-23 06:08:56,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:56,971 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2020-12-23 06:08:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 06:08:56,972 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2020-12-23 06:08:56,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:56,973 INFO L225 Difference]: With dead ends: 172 [2020-12-23 06:08:56,973 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 06:08:56,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:08:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 06:08:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-12-23 06:08:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 06:08:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-12-23 06:08:56,978 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-12-23 06:08:56,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:56,978 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-12-23 06:08:56,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 06:08:56,978 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-12-23 06:08:56,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 06:08:56,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:56,979 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:57,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:57,180 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash 817330253, now seen corresponding path program 80 times [2020-12-23 06:08:57,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:57,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346211186] [2020-12-23 06:08:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:01,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346211186] [2020-12-23 06:09:01,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528682567] [2020-12-23 06:09:01,640 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 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 [2020-12-23 06:09:01,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:01,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:09:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:02,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:02,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-23 06:09:02,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12820297] [2020-12-23 06:09:02,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-23 06:09:02,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:02,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-23 06:09:02,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:09:02,009 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2020-12-23 06:09:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:02,358 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2020-12-23 06:09:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 06:09:02,359 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2020-12-23 06:09:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:02,360 INFO L225 Difference]: With dead ends: 174 [2020-12-23 06:09:02,360 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 06:09:02,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:09:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 06:09:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-12-23 06:09:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 06:09:02,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-12-23 06:09:02,363 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-12-23 06:09:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:02,363 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-12-23 06:09:02,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-23 06:09:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-12-23 06:09:02,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 06:09:02,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:02,364 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:02,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:02,565 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:02,567 INFO L82 PathProgramCache]: Analyzing trace with hash -471409713, now seen corresponding path program 81 times [2020-12-23 06:09:02,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:02,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736868815] [2020-12-23 06:09:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:07,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736868815] [2020-12-23 06:09:07,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826113836] [2020-12-23 06:09:07,170 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 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 [2020-12-23 06:09:07,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-23 06:09:07,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:07,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 06:09:07,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:07,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:07,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-23 06:09:07,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057910103] [2020-12-23 06:09:07,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 06:09:07,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:07,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 06:09:07,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:09:07,640 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2020-12-23 06:09:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:08,057 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-12-23 06:09:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 06:09:08,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2020-12-23 06:09:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:08,059 INFO L225 Difference]: With dead ends: 176 [2020-12-23 06:09:08,059 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 06:09:08,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:09:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 06:09:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-12-23 06:09:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 06:09:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-12-23 06:09:08,063 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-12-23 06:09:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:08,063 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-12-23 06:09:08,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 06:09:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-12-23 06:09:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-23 06:09:08,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:08,065 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:08,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:08,274 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:08,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1999935791, now seen corresponding path program 82 times [2020-12-23 06:09:08,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:08,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580787686] [2020-12-23 06:09:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:13,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580787686] [2020-12-23 06:09:13,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088178270] [2020-12-23 06:09:13,001 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 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 [2020-12-23 06:09:13,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:13,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:13,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 06:09:13,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:13,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:13,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-23 06:09:13,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618226358] [2020-12-23 06:09:13,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 06:09:13,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:13,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 06:09:13,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:09:13,373 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2020-12-23 06:09:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:13,765 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-12-23 06:09:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 06:09:13,766 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2020-12-23 06:09:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:13,766 INFO L225 Difference]: With dead ends: 178 [2020-12-23 06:09:13,767 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 06:09:13,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:09:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 06:09:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-12-23 06:09:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 06:09:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-12-23 06:09:13,771 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-12-23 06:09:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:13,771 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-12-23 06:09:13,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 06:09:13,772 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-12-23 06:09:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 06:09:13,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:13,773 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:13,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:13,987 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:13,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2034681517, now seen corresponding path program 83 times [2020-12-23 06:09:13,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:13,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480850919] [2020-12-23 06:09:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:18,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480850919] [2020-12-23 06:09:18,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280767820] [2020-12-23 06:09:18,840 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 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 [2020-12-23 06:09:19,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-23 06:09:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 06:09:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:19,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:19,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-23 06:09:19,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865258427] [2020-12-23 06:09:19,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-23 06:09:19,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-23 06:09:19,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:09:19,281 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2020-12-23 06:09:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:19,642 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-12-23 06:09:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 06:09:19,643 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2020-12-23 06:09:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:19,644 INFO L225 Difference]: With dead ends: 180 [2020-12-23 06:09:19,644 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 06:09:19,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:09:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 06:09:19,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-23 06:09:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 06:09:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-12-23 06:09:19,648 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-12-23 06:09:19,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:19,649 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-12-23 06:09:19,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-23 06:09:19,649 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-12-23 06:09:19,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 06:09:19,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:19,650 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:19,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:19,864 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1065585835, now seen corresponding path program 84 times [2020-12-23 06:09:19,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:19,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752846014] [2020-12-23 06:09:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:24,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752846014] [2020-12-23 06:09:24,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561257747] [2020-12-23 06:09:24,872 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 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 [2020-12-23 06:09:25,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-12-23 06:09:25,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 06:09:25,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:25,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:25,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-23 06:09:25,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155513127] [2020-12-23 06:09:25,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 06:09:25,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:25,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 06:09:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:09:25,369 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2020-12-23 06:09:25,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:25,808 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2020-12-23 06:09:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 06:09:25,808 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2020-12-23 06:09:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:25,809 INFO L225 Difference]: With dead ends: 182 [2020-12-23 06:09:25,809 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 06:09:25,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:09:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 06:09:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-23 06:09:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 06:09:25,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-12-23 06:09:25,813 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-12-23 06:09:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:25,813 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-12-23 06:09:25,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 06:09:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-12-23 06:09:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 06:09:25,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:25,814 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:26,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-12-23 06:09:26,027 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1772538665, now seen corresponding path program 85 times [2020-12-23 06:09:26,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:26,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071320194] [2020-12-23 06:09:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:31,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071320194] [2020-12-23 06:09:31,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170158684] [2020-12-23 06:09:31,174 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 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 [2020-12-23 06:09:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:31,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 06:09:31,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:31,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:31,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-12-23 06:09:31,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069422406] [2020-12-23 06:09:31,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-23 06:09:31,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:31,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-23 06:09:31,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 06:09:31,568 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2020-12-23 06:09:32,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:32,024 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2020-12-23 06:09:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-23 06:09:32,025 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2020-12-23 06:09:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:32,026 INFO L225 Difference]: With dead ends: 184 [2020-12-23 06:09:32,026 INFO L226 Difference]: Without dead ends: 180 [2020-12-23 06:09:32,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 06:09:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-23 06:09:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-12-23 06:09:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 06:09:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-12-23 06:09:32,030 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-12-23 06:09:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:32,030 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-12-23 06:09:32,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-23 06:09:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-12-23 06:09:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 06:09:32,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:32,031 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:32,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:32,232 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1745591769, now seen corresponding path program 86 times [2020-12-23 06:09:32,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:32,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107172370] [2020-12-23 06:09:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:37,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107172370] [2020-12-23 06:09:37,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474143832] [2020-12-23 06:09:37,558 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 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 [2020-12-23 06:09:37,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 06:09:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:37,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:37,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-12-23 06:09:37,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122353176] [2020-12-23 06:09:37,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-23 06:09:37,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:37,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-23 06:09:37,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 06:09:37,948 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2020-12-23 06:09:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:38,422 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-12-23 06:09:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-23 06:09:38,423 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2020-12-23 06:09:38,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:38,424 INFO L225 Difference]: With dead ends: 186 [2020-12-23 06:09:38,424 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 06:09:38,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 06:09:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 06:09:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-12-23 06:09:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 06:09:38,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-12-23 06:09:38,428 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-12-23 06:09:38,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:38,428 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-12-23 06:09:38,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-23 06:09:38,429 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-12-23 06:09:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-23 06:09:38,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:38,430 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:38,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-12-23 06:09:38,635 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:38,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:38,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1765290405, now seen corresponding path program 87 times [2020-12-23 06:09:38,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:38,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275955197] [2020-12-23 06:09:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:44,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275955197] [2020-12-23 06:09:44,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445614847] [2020-12-23 06:09:44,084 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 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 [2020-12-23 06:09:44,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2020-12-23 06:09:44,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:44,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-23 06:09:44,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:44,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:44,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2020-12-23 06:09:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148927469] [2020-12-23 06:09:44,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-23 06:09:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:44,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-23 06:09:44,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 06:09:44,585 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2020-12-23 06:09:45,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:45,066 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-12-23 06:09:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-23 06:09:45,066 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2020-12-23 06:09:45,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:45,067 INFO L225 Difference]: With dead ends: 188 [2020-12-23 06:09:45,067 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 06:09:45,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 06:09:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 06:09:45,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-12-23 06:09:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 06:09:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-12-23 06:09:45,071 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-12-23 06:09:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:45,071 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-12-23 06:09:45,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-23 06:09:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-12-23 06:09:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-23 06:09:45,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:45,072 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:45,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-23 06:09:45,273 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:45,273 INFO L82 PathProgramCache]: Analyzing trace with hash 121235037, now seen corresponding path program 88 times [2020-12-23 06:09:45,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:45,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619217535] [2020-12-23 06:09:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:50,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619217535] [2020-12-23 06:09:50,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544781603] [2020-12-23 06:09:50,875 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 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 [2020-12-23 06:09:51,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:51,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:51,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 06:09:51,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:51,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:51,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2020-12-23 06:09:51,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983386468] [2020-12-23 06:09:51,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 06:09:51,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 06:09:51,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 06:09:51,275 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2020-12-23 06:09:51,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:51,669 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-12-23 06:09:51,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-23 06:09:51,670 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2020-12-23 06:09:51,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:51,671 INFO L225 Difference]: With dead ends: 190 [2020-12-23 06:09:51,672 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 06:09:51,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 06:09:51,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 06:09:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-12-23 06:09:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 06:09:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-12-23 06:09:51,676 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-12-23 06:09:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:51,676 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-12-23 06:09:51,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 06:09:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-12-23 06:09:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 06:09:51,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:51,678 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:51,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:51,893 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:51,894 INFO L82 PathProgramCache]: Analyzing trace with hash 595985887, now seen corresponding path program 89 times [2020-12-23 06:09:51,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:51,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533422634] [2020-12-23 06:09:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:57,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533422634] [2020-12-23 06:09:57,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295700679] [2020-12-23 06:09:57,671 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 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 [2020-12-23 06:09:57,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2020-12-23 06:09:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:57,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-23 06:09:57,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:58,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:58,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2020-12-23 06:09:58,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331966849] [2020-12-23 06:09:58,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-12-23 06:09:58,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-12-23 06:09:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 06:09:58,154 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2020-12-23 06:09:58,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:58,596 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2020-12-23 06:09:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-23 06:09:58,597 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2020-12-23 06:09:58,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:58,598 INFO L225 Difference]: With dead ends: 192 [2020-12-23 06:09:58,598 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 06:09:58,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 06:09:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 06:09:58,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-23 06:09:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 06:09:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-12-23 06:09:58,602 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2020-12-23 06:09:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:58,602 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-12-23 06:09:58,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-12-23 06:09:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-12-23 06:09:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 06:09:58,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:58,604 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:58,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:58,820 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:58,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:58,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1565019361, now seen corresponding path program 90 times [2020-12-23 06:09:58,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:58,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923854010] [2020-12-23 06:09:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:04,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:04,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923854010] [2020-12-23 06:10:04,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56920368] [2020-12-23 06:10:04,988 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 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 [2020-12-23 06:10:05,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2020-12-23 06:10:05,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:05,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-23 06:10:05,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:05,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:05,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2020-12-23 06:10:05,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416622943] [2020-12-23 06:10:05,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-23 06:10:05,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:05,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-23 06:10:05,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 06:10:05,543 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2020-12-23 06:10:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:06,051 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2020-12-23 06:10:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-23 06:10:06,051 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2020-12-23 06:10:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:06,052 INFO L225 Difference]: With dead ends: 194 [2020-12-23 06:10:06,052 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 06:10:06,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 06:10:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 06:10:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-12-23 06:10:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 06:10:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2020-12-23 06:10:06,056 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2020-12-23 06:10:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:06,056 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2020-12-23 06:10:06,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-23 06:10:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2020-12-23 06:10:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 06:10:06,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:06,057 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:06,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:06,258 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:06,258 INFO L82 PathProgramCache]: Analyzing trace with hash 798284643, now seen corresponding path program 91 times [2020-12-23 06:10:06,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:06,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19956997] [2020-12-23 06:10:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat