/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/divmul_diverge.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:00:48,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:00:48,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:00:48,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:00:48,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:00:48,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:00:48,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:00:48,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:00:48,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:00:48,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:00:48,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:00:48,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:00:48,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:00:48,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:00:48,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:00:48,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:00:48,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:00:48,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:00:48,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:00:48,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:00:48,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:00:48,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:00:48,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:00:48,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:00:48,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:00:48,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:00:48,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:00:48,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:00:48,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:00:48,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:00:48,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:00:48,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:00:48,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:00:48,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:00:48,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:00:48,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:00:48,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:00:49,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:00:49,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:00:49,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:00:49,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:00:49,016 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:00:49,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:00:49,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:00:49,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:00:49,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:00:49,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:00:49,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:00:49,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:00:49,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:00:49,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:00:49,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:00:49,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:00:49,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:00:49,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:00:49,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:00:49,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:00:49,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:00:49,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:00:49,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:00:49,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:00:49,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:00:49,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:00:49,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:00:49,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:00:49,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:00:49,477 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:00:49,478 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:00:49,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/divmul_diverge.c [2021-01-06 16:00:49,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ddafc27b/82a10688043a42298af762a5bd9d2d19/FLAG4e560c114 [2021-01-06 16:00:50,195 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:00:50,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/divmul_diverge.c [2021-01-06 16:00:50,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ddafc27b/82a10688043a42298af762a5bd9d2d19/FLAG4e560c114 [2021-01-06 16:00:50,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ddafc27b/82a10688043a42298af762a5bd9d2d19 [2021-01-06 16:00:50,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:00:50,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:00:50,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:50,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:00:50,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:00:50,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c0c8341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50, skipping insertion in model container [2021-01-06 16:00:50,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:00:50,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:00:50,855 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/divmul_diverge.c[613,626] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 16:00:50,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:50,885 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:00:50,898 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/divmul_diverge.c[613,626] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 16:00:50,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:00:50,920 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:00:50,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50 WrapperNode [2021-01-06 16:00:50,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:00:50,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:50,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:00:50,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:00:50,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:00:50,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:00:50,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:00:50,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:00:50,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... [2021-01-06 16:00:50,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:00:50,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:00:50,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:00:50,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:00:50,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:00:51,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:00:51,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:00:51,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:00:51,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:00:51,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:00:51,352 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 16:00:51,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:51 BoogieIcfgContainer [2021-01-06 16:00:51,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:00:51,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:00:51,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:00:51,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:00:51,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:00:50" (1/3) ... [2021-01-06 16:00:51,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d8efb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:00:51, skipping insertion in model container [2021-01-06 16:00:51,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:00:50" (2/3) ... [2021-01-06 16:00:51,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d8efb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:00:51, skipping insertion in model container [2021-01-06 16:00:51,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:00:51" (3/3) ... [2021-01-06 16:00:51,377 INFO L111 eAbstractionObserver]: Analyzing ICFG divmul_diverge.c [2021-01-06 16:00:51,386 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:00:51,391 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:00:51,415 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:00:51,453 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:00:51,461 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:00:51,462 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:00:51,462 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:00:51,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:00:51,462 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:00:51,462 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:00:51,462 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:00:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2021-01-06 16:00:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:00:51,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:51,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:00:51,499 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:51,506 INFO L82 PathProgramCache]: Analyzing trace with hash 889618939, now seen corresponding path program 1 times [2021-01-06 16:00:51,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:51,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32255719] [2021-01-06 16:00:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:51,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32255719] [2021-01-06 16:00:51,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:00:51,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:00:51,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497296829] [2021-01-06 16:00:51,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:00:51,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:00:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:00:51,739 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2021-01-06 16:00:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:51,772 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2021-01-06 16:00:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:00:51,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:00:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:51,784 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:00:51,785 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:00:51,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:00:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:00:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-01-06 16:00:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:00:51,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-01-06 16:00:51,830 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2021-01-06 16:00:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:51,831 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-01-06 16:00:51,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:00:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-01-06 16:00:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:00:51,832 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:51,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:51,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:00:51,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1271799529, now seen corresponding path program 1 times [2021-01-06 16:00:51,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:51,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44278186] [2021-01-06 16:00:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:51,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44278186] [2021-01-06 16:00:51,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604759885] [2021-01-06 16:00:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:00:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:52,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:52,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:00:52,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508925171] [2021-01-06 16:00:52,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:00:52,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:52,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:00:52,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:00:52,017 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2021-01-06 16:00:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:52,038 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-06 16:00:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:00:52,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 16:00:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:52,040 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:00:52,040 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 16:00:52,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:00:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 16:00:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2021-01-06 16:00:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:00:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-01-06 16:00:52,046 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2021-01-06 16:00:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:52,047 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-01-06 16:00:52,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:00:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-01-06 16:00:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:00:52,048 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:52,048 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:52,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:00:52,263 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1250006231, now seen corresponding path program 2 times [2021-01-06 16:00:52,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:52,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689353270] [2021-01-06 16:00:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:52,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689353270] [2021-01-06 16:00:52,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625064346] [2021-01-06 16:00:52,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:52,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:00:52,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:00:52,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:52,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:52,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:00:52,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516864221] [2021-01-06 16:00:52,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:00:52,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:52,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:00:52,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:00:52,512 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2021-01-06 16:00:52,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:52,536 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-01-06 16:00:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:00:52,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-01-06 16:00:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:52,539 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:00:52,539 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:00:52,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:00:52,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:00:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-01-06 16:00:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:00:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-01-06 16:00:52,550 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2021-01-06 16:00:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:52,551 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-01-06 16:00:52,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:00:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-01-06 16:00:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:00:52,552 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:52,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:52,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:52,767 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash 898393029, now seen corresponding path program 3 times [2021-01-06 16:00:52,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:52,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961264339] [2021-01-06 16:00:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:52,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961264339] [2021-01-06 16:00:52,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779430450] [2021-01-06 16:00:52,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:52,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:00:52,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:52,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:00:52,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:52,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:52,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:00:52,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982727515] [2021-01-06 16:00:52,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:00:52,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:00:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:00:52,937 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2021-01-06 16:00:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:52,962 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-01-06 16:00:52,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:00:52,962 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-01-06 16:00:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:52,963 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:00:52,964 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:00:52,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:00:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:00:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-01-06 16:00:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:00:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 16:00:52,970 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2021-01-06 16:00:52,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:52,970 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 16:00:52,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:00:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 16:00:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:00:52,972 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:52,972 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:53,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:53,187 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash -275117133, now seen corresponding path program 4 times [2021-01-06 16:00:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:53,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502417723] [2021-01-06 16:00:53,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:53,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502417723] [2021-01-06 16:00:53,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830636954] [2021-01-06 16:00:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:53,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:00:53,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:53,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:00:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:53,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:53,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:00:53,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223118872] [2021-01-06 16:00:53,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:00:53,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:53,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:00:53,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:00:53,521 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2021-01-06 16:00:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:53,547 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-01-06 16:00:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:00:53,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2021-01-06 16:00:53,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:53,549 INFO L225 Difference]: With dead ends: 40 [2021-01-06 16:00:53,549 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 16:00:53,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:00:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 16:00:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-01-06 16:00:53,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 16:00:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-01-06 16:00:53,555 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2021-01-06 16:00:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:53,555 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-01-06 16:00:53,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:00:53,556 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-01-06 16:00:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:00:53,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:53,557 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:53,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:53,773 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:53,775 INFO L82 PathProgramCache]: Analyzing trace with hash 429264033, now seen corresponding path program 5 times [2021-01-06 16:00:53,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:53,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278922272] [2021-01-06 16:00:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:53,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278922272] [2021-01-06 16:00:53,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664143554] [2021-01-06 16:00:53,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:53,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:00:53,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:53,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:00:53,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:53,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:53,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:00:53,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837808353] [2021-01-06 16:00:53,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:00:53,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:53,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:00:53,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:00:53,976 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 9 states. [2021-01-06 16:00:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:54,008 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-01-06 16:00:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:00:54,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2021-01-06 16:00:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:54,009 INFO L225 Difference]: With dead ends: 45 [2021-01-06 16:00:54,009 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 16:00:54,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:00:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 16:00:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-01-06 16:00:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:00:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2021-01-06 16:00:54,016 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 26 [2021-01-06 16:00:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:54,016 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2021-01-06 16:00:54,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:00:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2021-01-06 16:00:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:00:54,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:54,018 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:54,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:00:54,234 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash -223615345, now seen corresponding path program 6 times [2021-01-06 16:00:54,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:54,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920335903] [2021-01-06 16:00:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:54,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920335903] [2021-01-06 16:00:54,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218464232] [2021-01-06 16:00:54,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:54,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:00:54,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:00:54,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:54,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:54,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:00:54,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963133208] [2021-01-06 16:00:54,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:00:54,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:00:54,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:00:54,508 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2021-01-06 16:00:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:54,548 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-01-06 16:00:54,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:00:54,554 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2021-01-06 16:00:54,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:54,555 INFO L225 Difference]: With dead ends: 50 [2021-01-06 16:00:54,556 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 16:00:54,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:00:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 16:00:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-01-06 16:00:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:00:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-01-06 16:00:54,570 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 30 [2021-01-06 16:00:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:54,571 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-01-06 16:00:54,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:00:54,571 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-01-06 16:00:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:00:54,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:54,574 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:54,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:54,789 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:54,791 INFO L82 PathProgramCache]: Analyzing trace with hash 944183677, now seen corresponding path program 7 times [2021-01-06 16:00:54,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:54,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915883242] [2021-01-06 16:00:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915883242] [2021-01-06 16:00:54,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550709535] [2021-01-06 16:00:54,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:54,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:00:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:55,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:55,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:00:55,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983797468] [2021-01-06 16:00:55,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:00:55,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:55,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:00:55,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:00:55,015 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 11 states. [2021-01-06 16:00:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:55,053 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-01-06 16:00:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:00:55,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2021-01-06 16:00:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:55,055 INFO L225 Difference]: With dead ends: 55 [2021-01-06 16:00:55,055 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 16:00:55,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:00:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 16:00:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-01-06 16:00:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 16:00:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-01-06 16:00:55,062 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 34 [2021-01-06 16:00:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:55,063 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-01-06 16:00:55,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:00:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-01-06 16:00:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-01-06 16:00:55,064 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:55,065 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:55,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:55,281 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:55,283 INFO L82 PathProgramCache]: Analyzing trace with hash 101918059, now seen corresponding path program 8 times [2021-01-06 16:00:55,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:55,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553993059] [2021-01-06 16:00:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:55,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553993059] [2021-01-06 16:00:55,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235662304] [2021-01-06 16:00:55,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:55,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:00:55,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:55,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:00:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:55,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:55,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:00:55,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626766380] [2021-01-06 16:00:55,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:00:55,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:00:55,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:00:55,572 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 12 states. [2021-01-06 16:00:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:55,626 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-01-06 16:00:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:00:55,627 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2021-01-06 16:00:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:55,628 INFO L225 Difference]: With dead ends: 60 [2021-01-06 16:00:55,628 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 16:00:55,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:00:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 16:00:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-01-06 16:00:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 16:00:55,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-01-06 16:00:55,648 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2021-01-06 16:00:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:55,651 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-01-06 16:00:55,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:00:55,651 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-01-06 16:00:55,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:00:55,653 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:55,653 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:55,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:00:55,871 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1241806247, now seen corresponding path program 9 times [2021-01-06 16:00:55,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:55,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847783493] [2021-01-06 16:00:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:55,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847783493] [2021-01-06 16:00:55,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351151288] [2021-01-06 16:00:55,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:56,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:00:56,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:56,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:00:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:56,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:56,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:00:56,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857840139] [2021-01-06 16:00:56,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:00:56,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:56,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:00:56,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:00:56,141 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 13 states. [2021-01-06 16:00:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:56,208 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2021-01-06 16:00:56,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:00:56,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2021-01-06 16:00:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:56,209 INFO L225 Difference]: With dead ends: 65 [2021-01-06 16:00:56,209 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 16:00:56,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:00:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 16:00:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2021-01-06 16:00:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 16:00:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-01-06 16:00:56,216 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 42 [2021-01-06 16:00:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:56,216 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-01-06 16:00:56,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:00:56,216 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-01-06 16:00:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 16:00:56,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:56,218 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:56,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:56,434 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:56,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:56,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1070872505, now seen corresponding path program 10 times [2021-01-06 16:00:56,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:56,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317468213] [2021-01-06 16:00:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:56,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317468213] [2021-01-06 16:00:56,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628524834] [2021-01-06 16:00:56,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:56,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:00:56,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:00:56,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:56,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:56,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:00:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808803438] [2021-01-06 16:00:56,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:00:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:00:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:00:56,759 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 14 states. [2021-01-06 16:00:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:56,810 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-01-06 16:00:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:00:56,810 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2021-01-06 16:00:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:56,812 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:00:56,812 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:00:56,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:00:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:00:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-01-06 16:00:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 16:00:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-01-06 16:00:56,818 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 46 [2021-01-06 16:00:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:56,818 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-01-06 16:00:56,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:00:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-01-06 16:00:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:00:56,820 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:56,820 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:57,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:57,034 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:57,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1693491403, now seen corresponding path program 11 times [2021-01-06 16:00:57,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:57,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993049341] [2021-01-06 16:00:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:57,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993049341] [2021-01-06 16:00:57,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745125717] [2021-01-06 16:00:57,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:57,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:00:57,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:57,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:00:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:57,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:57,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:00:57,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687130057] [2021-01-06 16:00:57,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:00:57,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:57,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:00:57,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:00:57,329 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 15 states. [2021-01-06 16:00:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:57,376 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-01-06 16:00:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:00:57,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2021-01-06 16:00:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:57,378 INFO L225 Difference]: With dead ends: 75 [2021-01-06 16:00:57,378 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 16:00:57,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:00:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 16:00:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-01-06 16:00:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:00:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-01-06 16:00:57,384 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 50 [2021-01-06 16:00:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:57,384 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-01-06 16:00:57,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:00:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-01-06 16:00:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 16:00:57,385 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:57,386 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:57,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:00:57,601 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:57,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1689137373, now seen corresponding path program 12 times [2021-01-06 16:00:57,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:57,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841608309] [2021-01-06 16:00:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:57,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841608309] [2021-01-06 16:00:57,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124755115] [2021-01-06 16:00:57,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:57,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:00:57,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:57,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:00:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:57,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:57,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:00:57,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959218706] [2021-01-06 16:00:57,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:00:57,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:00:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:00:57,859 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 16 states. [2021-01-06 16:00:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:57,909 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2021-01-06 16:00:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:00:57,910 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2021-01-06 16:00:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:57,910 INFO L225 Difference]: With dead ends: 80 [2021-01-06 16:00:57,911 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 16:00:57,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:00:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 16:00:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2021-01-06 16:00:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 16:00:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-01-06 16:00:57,916 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 54 [2021-01-06 16:00:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:57,917 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-01-06 16:00:57,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:00:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-01-06 16:00:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:00:57,918 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:57,918 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:58,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:00:58,133 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash -740386799, now seen corresponding path program 13 times [2021-01-06 16:00:58,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:58,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071703207] [2021-01-06 16:00:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:58,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071703207] [2021-01-06 16:00:58,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144072132] [2021-01-06 16:00:58,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:58,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:00:58,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:58,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:58,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:00:58,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463637553] [2021-01-06 16:00:58,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:00:58,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:58,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:00:58,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:00:58,435 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 17 states. [2021-01-06 16:00:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:58,482 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2021-01-06 16:00:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:00:58,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2021-01-06 16:00:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:58,484 INFO L225 Difference]: With dead ends: 85 [2021-01-06 16:00:58,484 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 16:00:58,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:00:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 16:00:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-01-06 16:00:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 16:00:58,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2021-01-06 16:00:58,490 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 58 [2021-01-06 16:00:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:58,490 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2021-01-06 16:00:58,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:00:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2021-01-06 16:00:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 16:00:58,491 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:58,492 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:58,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:00:58,705 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:58,706 INFO L82 PathProgramCache]: Analyzing trace with hash -169788929, now seen corresponding path program 14 times [2021-01-06 16:00:58,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:58,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750702576] [2021-01-06 16:00:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:58,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750702576] [2021-01-06 16:00:58,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285544266] [2021-01-06 16:00:58,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:58,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:00:58,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:00:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:59,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:59,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:00:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281174025] [2021-01-06 16:00:59,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:00:59,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:59,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:00:59,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:00:59,038 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 18 states. [2021-01-06 16:00:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:59,118 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2021-01-06 16:00:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:00:59,118 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2021-01-06 16:00:59,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:59,119 INFO L225 Difference]: With dead ends: 90 [2021-01-06 16:00:59,119 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:00:59,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:00:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:00:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2021-01-06 16:00:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 16:00:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2021-01-06 16:00:59,125 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 62 [2021-01-06 16:00:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:59,125 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2021-01-06 16:00:59,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:00:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2021-01-06 16:00:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:00:59,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:59,127 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:59,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:59,342 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash 818230509, now seen corresponding path program 15 times [2021-01-06 16:00:59,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:59,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967064260] [2021-01-06 16:00:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:00:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:59,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967064260] [2021-01-06 16:00:59,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693159536] [2021-01-06 16:00:59,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:00:59,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:00:59,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:00:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:00:59,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:00:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:00:59,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:00:59,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:00:59,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753014593] [2021-01-06 16:00:59,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:00:59,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:00:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:00:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:00:59,651 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 19 states. [2021-01-06 16:00:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:00:59,705 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2021-01-06 16:00:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:00:59,705 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2021-01-06 16:00:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:00:59,706 INFO L225 Difference]: With dead ends: 95 [2021-01-06 16:00:59,706 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 16:00:59,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:00:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 16:00:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-01-06 16:00:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:00:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-01-06 16:00:59,720 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 66 [2021-01-06 16:00:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:00:59,721 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-01-06 16:00:59,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:00:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-01-06 16:00:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 16:00:59,725 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:00:59,726 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2021-01-06 16:00:59,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:00:59,930 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:00:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:00:59,931 INFO L82 PathProgramCache]: Analyzing trace with hash 305531099, now seen corresponding path program 16 times [2021-01-06 16:00:59,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:00:59,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235471692] [2021-01-06 16:00:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:00:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235471692] [2021-01-06 16:01:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172771370] [2021-01-06 16:01:00,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:00,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:01:00,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:00,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:00,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:01:00,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633819063] [2021-01-06 16:01:00,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:01:00,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:00,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:01:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:01:00,326 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 20 states. [2021-01-06 16:01:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:00,388 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2021-01-06 16:01:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:01:00,389 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2021-01-06 16:01:00,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:00,390 INFO L225 Difference]: With dead ends: 100 [2021-01-06 16:01:00,390 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 16:01:00,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:01:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 16:01:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-01-06 16:01:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 16:01:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2021-01-06 16:01:00,398 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 70 [2021-01-06 16:01:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:00,398 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2021-01-06 16:01:00,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:01:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2021-01-06 16:01:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:01:00,400 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:00,400 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:00,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:01:00,616 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1713321417, now seen corresponding path program 17 times [2021-01-06 16:01:00,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:00,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238817822] [2021-01-06 16:01:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:00,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238817822] [2021-01-06 16:01:00,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514249426] [2021-01-06 16:01:00,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:00,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:01:00,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:01:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:00,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:00,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:01:00,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275340928] [2021-01-06 16:01:00,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:01:00,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:01:00,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:01:00,989 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 21 states. [2021-01-06 16:01:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:01,054 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2021-01-06 16:01:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:01:01,055 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2021-01-06 16:01:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:01,056 INFO L225 Difference]: With dead ends: 105 [2021-01-06 16:01:01,056 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 16:01:01,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:01:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 16:01:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-01-06 16:01:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 16:01:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2021-01-06 16:01:01,061 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 74 [2021-01-06 16:01:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:01,062 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2021-01-06 16:01:01,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:01:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2021-01-06 16:01:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 16:01:01,063 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:01,063 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:01,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:01:01,279 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash 380386231, now seen corresponding path program 18 times [2021-01-06 16:01:01,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:01,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334691847] [2021-01-06 16:01:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:01,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334691847] [2021-01-06 16:01:01,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845934945] [2021-01-06 16:01:01,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:01,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:01:01,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:01,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:01:01,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:01,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:01,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:01:01,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887903316] [2021-01-06 16:01:01,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:01:01,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:01,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:01:01,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:01:01,694 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 22 states. [2021-01-06 16:01:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:01,760 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-01-06 16:01:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:01:01,760 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2021-01-06 16:01:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:01,761 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:01:01,761 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:01:01,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:01:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:01:01,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2021-01-06 16:01:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 16:01:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2021-01-06 16:01:01,766 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 78 [2021-01-06 16:01:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:01,767 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2021-01-06 16:01:01,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:01:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2021-01-06 16:01:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:01:01,768 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:01,768 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:01,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:01,978 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:01,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:01,979 INFO L82 PathProgramCache]: Analyzing trace with hash 206084773, now seen corresponding path program 19 times [2021-01-06 16:01:01,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:01,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420329726] [2021-01-06 16:01:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:02,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420329726] [2021-01-06 16:01:02,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251895082] [2021-01-06 16:01:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:01:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:02,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:02,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:01:02,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786212344] [2021-01-06 16:01:02,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:01:02,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:02,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:01:02,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:01:02,394 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand 23 states. [2021-01-06 16:01:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:02,484 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2021-01-06 16:01:02,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:01:02,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 82 [2021-01-06 16:01:02,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:02,486 INFO L225 Difference]: With dead ends: 115 [2021-01-06 16:01:02,486 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 16:01:02,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:01:02,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 16:01:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-01-06 16:01:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 16:01:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2021-01-06 16:01:02,491 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 82 [2021-01-06 16:01:02,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:02,491 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2021-01-06 16:01:02,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:01:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2021-01-06 16:01:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-01-06 16:01:02,492 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:02,493 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:02,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:02,706 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash 228577939, now seen corresponding path program 20 times [2021-01-06 16:01:02,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:02,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996495053] [2021-01-06 16:01:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:02,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996495053] [2021-01-06 16:01:02,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539438970] [2021-01-06 16:01:02,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:03,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:03,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:03,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:01:03,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:03,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:03,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:01:03,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630619611] [2021-01-06 16:01:03,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:01:03,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:01:03,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:01:03,181 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand 24 states. [2021-01-06 16:01:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:03,272 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2021-01-06 16:01:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:01:03,272 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2021-01-06 16:01:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:03,273 INFO L225 Difference]: With dead ends: 120 [2021-01-06 16:01:03,274 INFO L226 Difference]: Without dead ends: 116 [2021-01-06 16:01:03,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:01:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-01-06 16:01:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-01-06 16:01:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 16:01:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-01-06 16:01:03,279 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 86 [2021-01-06 16:01:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:03,279 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-01-06 16:01:03,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:01:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-01-06 16:01:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 16:01:03,281 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:03,281 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:03,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:01:03,495 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1617075327, now seen corresponding path program 21 times [2021-01-06 16:01:03,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:03,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075446548] [2021-01-06 16:01:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:03,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075446548] [2021-01-06 16:01:03,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183842356] [2021-01-06 16:01:03,843 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 [2021-01-06 16:01:03,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:01:03,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:03,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:01:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:04,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:04,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:01:04,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097995383] [2021-01-06 16:01:04,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:01:04,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:01:04,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:01:04,017 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 25 states. [2021-01-06 16:01:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:04,092 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2021-01-06 16:01:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:01:04,093 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 90 [2021-01-06 16:01:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:04,094 INFO L225 Difference]: With dead ends: 125 [2021-01-06 16:01:04,094 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 16:01:04,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:01:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 16:01:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2021-01-06 16:01:04,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 16:01:04,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2021-01-06 16:01:04,102 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 90 [2021-01-06 16:01:04,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:04,102 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2021-01-06 16:01:04,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:01:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2021-01-06 16:01:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 16:01:04,103 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:04,103 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:04,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:01:04,319 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash -445854353, now seen corresponding path program 22 times [2021-01-06 16:01:04,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:04,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981052544] [2021-01-06 16:01:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:04,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981052544] [2021-01-06 16:01:04,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147748104] [2021-01-06 16:01:04,637 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 [2021-01-06 16:01:04,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:04,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:04,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:01:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:04,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:04,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:01:04,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209297822] [2021-01-06 16:01:04,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:01:04,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:04,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:01:04,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:01:04,805 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 26 states. [2021-01-06 16:01:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:04,897 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2021-01-06 16:01:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:01:04,898 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2021-01-06 16:01:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:04,899 INFO L225 Difference]: With dead ends: 130 [2021-01-06 16:01:04,899 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 16:01:04,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:01:04,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 16:01:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2021-01-06 16:01:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 16:01:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2021-01-06 16:01:04,905 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 94 [2021-01-06 16:01:04,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:04,906 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2021-01-06 16:01:04,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:01:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2021-01-06 16:01:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 16:01:04,907 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:04,907 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:05,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:05,121 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:05,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2139516835, now seen corresponding path program 23 times [2021-01-06 16:01:05,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:05,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796469827] [2021-01-06 16:01:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:05,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796469827] [2021-01-06 16:01:05,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48754453] [2021-01-06 16:01:05,457 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 [2021-01-06 16:01:05,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 16:01:05,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:01:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:05,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:05,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:01:05,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302621408] [2021-01-06 16:01:05,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:01:05,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:01:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:01:05,658 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 27 states. [2021-01-06 16:01:05,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:05,748 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2021-01-06 16:01:05,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:01:05,749 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 98 [2021-01-06 16:01:05,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:05,750 INFO L225 Difference]: With dead ends: 135 [2021-01-06 16:01:05,750 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 16:01:05,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:01:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 16:01:05,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-01-06 16:01:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 16:01:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 151 transitions. [2021-01-06 16:01:05,755 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 151 transitions. Word has length 98 [2021-01-06 16:01:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:05,755 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 151 transitions. [2021-01-06 16:01:05,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:01:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 151 transitions. [2021-01-06 16:01:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 16:01:05,757 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:05,757 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:05,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:01:05,971 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1886334027, now seen corresponding path program 24 times [2021-01-06 16:01:05,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:05,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458267377] [2021-01-06 16:01:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:06,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458267377] [2021-01-06 16:01:06,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947831910] [2021-01-06 16:01:06,326 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 [2021-01-06 16:01:06,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:01:06,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:06,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:01:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:06,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:06,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:01:06,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324682409] [2021-01-06 16:01:06,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:01:06,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:06,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:01:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:01:06,519 INFO L87 Difference]: Start difference. First operand 127 states and 151 transitions. Second operand 28 states. [2021-01-06 16:01:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:06,610 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2021-01-06 16:01:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:01:06,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 102 [2021-01-06 16:01:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:06,611 INFO L225 Difference]: With dead ends: 140 [2021-01-06 16:01:06,611 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 16:01:06,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:01:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 16:01:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2021-01-06 16:01:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 16:01:06,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-01-06 16:01:06,617 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 102 [2021-01-06 16:01:06,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:06,617 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-01-06 16:01:06,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:01:06,618 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-01-06 16:01:06,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 16:01:06,619 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:06,619 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:06,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:06,834 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:06,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:06,835 INFO L82 PathProgramCache]: Analyzing trace with hash -214359751, now seen corresponding path program 25 times [2021-01-06 16:01:06,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:06,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134962526] [2021-01-06 16:01:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:07,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134962526] [2021-01-06 16:01:07,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339520662] [2021-01-06 16:01:07,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:01:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:07,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:07,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:01:07,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188884584] [2021-01-06 16:01:07,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:01:07,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:01:07,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:01:07,391 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand 29 states. [2021-01-06 16:01:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:07,488 INFO L93 Difference]: Finished difference Result 145 states and 172 transitions. [2021-01-06 16:01:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:01:07,489 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 106 [2021-01-06 16:01:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:07,490 INFO L225 Difference]: With dead ends: 145 [2021-01-06 16:01:07,491 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 16:01:07,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:01:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 16:01:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2021-01-06 16:01:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 16:01:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2021-01-06 16:01:07,496 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 106 [2021-01-06 16:01:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:07,496 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2021-01-06 16:01:07,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:01:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2021-01-06 16:01:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 16:01:07,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:07,497 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:07,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:01:07,712 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:07,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1694691111, now seen corresponding path program 26 times [2021-01-06 16:01:07,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:07,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549721443] [2021-01-06 16:01:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549721443] [2021-01-06 16:01:08,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98449213] [2021-01-06 16:01:08,092 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 [2021-01-06 16:01:08,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:08,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:01:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:08,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:08,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:01:08,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138766689] [2021-01-06 16:01:08,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:01:08,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:08,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:01:08,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:01:08,264 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand 30 states. [2021-01-06 16:01:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:08,360 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2021-01-06 16:01:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:01:08,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2021-01-06 16:01:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:08,361 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:01:08,362 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 16:01:08,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:01:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 16:01:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2021-01-06 16:01:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 16:01:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 169 transitions. [2021-01-06 16:01:08,367 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 169 transitions. Word has length 110 [2021-01-06 16:01:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:08,367 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 169 transitions. [2021-01-06 16:01:08,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:01:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 169 transitions. [2021-01-06 16:01:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 16:01:08,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:08,369 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:08,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:01:08,584 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:08,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:08,584 INFO L82 PathProgramCache]: Analyzing trace with hash 540546581, now seen corresponding path program 27 times [2021-01-06 16:01:08,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:08,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663813762] [2021-01-06 16:01:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663813762] [2021-01-06 16:01:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632616257] [2021-01-06 16:01:08,982 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 [2021-01-06 16:01:09,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 16:01:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:01:09,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:09,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:09,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:01:09,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655314596] [2021-01-06 16:01:09,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:01:09,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:01:09,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:01:09,191 INFO L87 Difference]: Start difference. First operand 142 states and 169 transitions. Second operand 31 states. [2021-01-06 16:01:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:09,295 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2021-01-06 16:01:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:01:09,295 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 114 [2021-01-06 16:01:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:09,297 INFO L225 Difference]: With dead ends: 155 [2021-01-06 16:01:09,297 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 16:01:09,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:01:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 16:01:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2021-01-06 16:01:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 16:01:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2021-01-06 16:01:09,302 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 114 [2021-01-06 16:01:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:09,302 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2021-01-06 16:01:09,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:01:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2021-01-06 16:01:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 16:01:09,303 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:09,304 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:09,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:01:09,518 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:09,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1568937475, now seen corresponding path program 28 times [2021-01-06 16:01:09,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:09,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663310017] [2021-01-06 16:01:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:09,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663310017] [2021-01-06 16:01:09,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626324] [2021-01-06 16:01:09,967 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 [2021-01-06 16:01:10,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:10,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:01:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:10,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:10,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:01:10,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789298507] [2021-01-06 16:01:10,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:01:10,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:10,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:01:10,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:01:10,155 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 32 states. [2021-01-06 16:01:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:10,278 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-01-06 16:01:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:01:10,279 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2021-01-06 16:01:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:10,280 INFO L225 Difference]: With dead ends: 160 [2021-01-06 16:01:10,280 INFO L226 Difference]: Without dead ends: 156 [2021-01-06 16:01:10,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:01:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-01-06 16:01:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2021-01-06 16:01:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 16:01:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2021-01-06 16:01:10,285 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 118 [2021-01-06 16:01:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:10,286 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2021-01-06 16:01:10,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:01:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2021-01-06 16:01:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 16:01:10,287 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:10,287 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:10,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:01:10,500 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash 332558065, now seen corresponding path program 29 times [2021-01-06 16:01:10,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:10,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530504802] [2021-01-06 16:01:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:10,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530504802] [2021-01-06 16:01:10,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180085641] [2021-01-06 16:01:10,993 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 [2021-01-06 16:01:11,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 16:01:11,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:11,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:01:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:11,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:11,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:01:11,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222357424] [2021-01-06 16:01:11,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:01:11,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:11,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:01:11,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:01:11,209 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand 33 states. [2021-01-06 16:01:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:11,314 INFO L93 Difference]: Finished difference Result 165 states and 196 transitions. [2021-01-06 16:01:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:01:11,315 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2021-01-06 16:01:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:11,316 INFO L225 Difference]: With dead ends: 165 [2021-01-06 16:01:11,316 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 16:01:11,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:01:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 16:01:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2021-01-06 16:01:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 16:01:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2021-01-06 16:01:11,323 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 122 [2021-01-06 16:01:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:11,324 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2021-01-06 16:01:11,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:01:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2021-01-06 16:01:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 16:01:11,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:11,325 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:11,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:11,540 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:11,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash -665935649, now seen corresponding path program 30 times [2021-01-06 16:01:11,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:11,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759176593] [2021-01-06 16:01:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:12,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759176593] [2021-01-06 16:01:12,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371678467] [2021-01-06 16:01:12,022 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 [2021-01-06 16:01:12,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:01:12,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:01:12,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:12,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:12,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:01:12,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465679557] [2021-01-06 16:01:12,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:01:12,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:01:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:01:12,234 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand 34 states. [2021-01-06 16:01:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:12,366 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2021-01-06 16:01:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:01:12,366 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 126 [2021-01-06 16:01:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:12,367 INFO L225 Difference]: With dead ends: 170 [2021-01-06 16:01:12,368 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 16:01:12,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:01:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 16:01:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2021-01-06 16:01:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 16:01:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 193 transitions. [2021-01-06 16:01:12,373 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 193 transitions. Word has length 126 [2021-01-06 16:01:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:12,373 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 193 transitions. [2021-01-06 16:01:12,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:01:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 193 transitions. [2021-01-06 16:01:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 16:01:12,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:12,374 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:12,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:12,581 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:12,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1100731443, now seen corresponding path program 31 times [2021-01-06 16:01:12,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:12,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730783745] [2021-01-06 16:01:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:13,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730783745] [2021-01-06 16:01:13,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653737486] [2021-01-06 16:01:13,148 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 [2021-01-06 16:01:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:13,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:01:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:13,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:13,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:01:13,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659525574] [2021-01-06 16:01:13,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:01:13,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:13,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:01:13,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:01:13,350 INFO L87 Difference]: Start difference. First operand 162 states and 193 transitions. Second operand 35 states. [2021-01-06 16:01:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:13,472 INFO L93 Difference]: Finished difference Result 175 states and 208 transitions. [2021-01-06 16:01:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:01:13,473 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 130 [2021-01-06 16:01:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:13,477 INFO L225 Difference]: With dead ends: 175 [2021-01-06 16:01:13,477 INFO L226 Difference]: Without dead ends: 171 [2021-01-06 16:01:13,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:01:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-01-06 16:01:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2021-01-06 16:01:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-01-06 16:01:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2021-01-06 16:01:13,485 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 130 [2021-01-06 16:01:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:13,486 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2021-01-06 16:01:13,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:01:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2021-01-06 16:01:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-01-06 16:01:13,487 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:13,487 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:13,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:13,702 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:13,703 INFO L82 PathProgramCache]: Analyzing trace with hash 935235515, now seen corresponding path program 32 times [2021-01-06 16:01:13,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:13,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22888006] [2021-01-06 16:01:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:14,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22888006] [2021-01-06 16:01:14,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968788286] [2021-01-06 16:01:14,302 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 [2021-01-06 16:01:14,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:14,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:01:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:14,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:14,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:01:14,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495486301] [2021-01-06 16:01:14,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:01:14,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:01:14,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:01:14,525 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand 36 states. [2021-01-06 16:01:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:14,666 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2021-01-06 16:01:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:01:14,667 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 134 [2021-01-06 16:01:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:14,668 INFO L225 Difference]: With dead ends: 180 [2021-01-06 16:01:14,669 INFO L226 Difference]: Without dead ends: 176 [2021-01-06 16:01:14,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:01:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-01-06 16:01:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2021-01-06 16:01:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2021-01-06 16:01:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2021-01-06 16:01:14,675 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 134 [2021-01-06 16:01:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:14,675 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2021-01-06 16:01:14,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:01:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2021-01-06 16:01:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 16:01:14,676 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:14,677 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:14,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:01:14,892 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -196522839, now seen corresponding path program 33 times [2021-01-06 16:01:14,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:14,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386403353] [2021-01-06 16:01:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:15,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386403353] [2021-01-06 16:01:15,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842542164] [2021-01-06 16:01:15,578 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 [2021-01-06 16:01:15,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 16:01:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:01:15,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:15,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:15,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:15,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:01:15,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862848264] [2021-01-06 16:01:15,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:01:15,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:15,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:01:15,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:01:15,857 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand 37 states. [2021-01-06 16:01:16,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:16,022 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2021-01-06 16:01:16,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:01:16,022 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2021-01-06 16:01:16,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:16,023 INFO L225 Difference]: With dead ends: 185 [2021-01-06 16:01:16,023 INFO L226 Difference]: Without dead ends: 181 [2021-01-06 16:01:16,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:01:16,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-01-06 16:01:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2021-01-06 16:01:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 16:01:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2021-01-06 16:01:16,029 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 138 [2021-01-06 16:01:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:16,029 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2021-01-06 16:01:16,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:01:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2021-01-06 16:01:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 16:01:16,031 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:16,031 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:16,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:16,245 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:16,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1037049193, now seen corresponding path program 34 times [2021-01-06 16:01:16,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:16,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817293173] [2021-01-06 16:01:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:16,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817293173] [2021-01-06 16:01:16,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470551411] [2021-01-06 16:01:16,892 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 [2021-01-06 16:01:16,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:16,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:01:16,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:17,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:17,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:01:17,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477993783] [2021-01-06 16:01:17,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:01:17,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:01:17,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:01:17,098 INFO L87 Difference]: Start difference. First operand 177 states and 211 transitions. Second operand 38 states. [2021-01-06 16:01:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:17,240 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2021-01-06 16:01:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:01:17,240 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 142 [2021-01-06 16:01:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:17,242 INFO L225 Difference]: With dead ends: 190 [2021-01-06 16:01:17,242 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 16:01:17,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:01:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 16:01:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2021-01-06 16:01:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 16:01:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2021-01-06 16:01:17,248 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 142 [2021-01-06 16:01:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:17,248 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2021-01-06 16:01:17,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:01:17,249 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2021-01-06 16:01:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 16:01:17,249 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:17,250 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:17,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:01:17,463 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:17,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:17,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1843253637, now seen corresponding path program 35 times [2021-01-06 16:01:17,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:17,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965238223] [2021-01-06 16:01:17,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:18,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965238223] [2021-01-06 16:01:18,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051515642] [2021-01-06 16:01:18,165 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 [2021-01-06 16:01:18,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 16:01:18,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:01:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:18,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:18,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:01:18,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493085380] [2021-01-06 16:01:18,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:01:18,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:18,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:01:18,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:01:18,401 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand 39 states. [2021-01-06 16:01:18,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:18,546 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2021-01-06 16:01:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:01:18,547 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 146 [2021-01-06 16:01:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:18,548 INFO L225 Difference]: With dead ends: 195 [2021-01-06 16:01:18,548 INFO L226 Difference]: Without dead ends: 191 [2021-01-06 16:01:18,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:01:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-01-06 16:01:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2021-01-06 16:01:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 16:01:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 223 transitions. [2021-01-06 16:01:18,554 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 223 transitions. Word has length 146 [2021-01-06 16:01:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:18,555 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 223 transitions. [2021-01-06 16:01:18,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:01:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 223 transitions. [2021-01-06 16:01:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 16:01:18,556 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:18,556 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:18,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:18,769 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1577150093, now seen corresponding path program 36 times [2021-01-06 16:01:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:18,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227327422] [2021-01-06 16:01:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:19,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227327422] [2021-01-06 16:01:19,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405261712] [2021-01-06 16:01:19,515 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 [2021-01-06 16:01:19,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 16:01:19,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:01:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:19,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:19,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:01:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032156430] [2021-01-06 16:01:19,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:01:19,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:19,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:01:19,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:01:19,779 INFO L87 Difference]: Start difference. First operand 187 states and 223 transitions. Second operand 40 states. [2021-01-06 16:01:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:19,967 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2021-01-06 16:01:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:01:19,967 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2021-01-06 16:01:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:19,968 INFO L225 Difference]: With dead ends: 200 [2021-01-06 16:01:19,969 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 16:01:19,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:01:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 16:01:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2021-01-06 16:01:19,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2021-01-06 16:01:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2021-01-06 16:01:19,975 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 150 [2021-01-06 16:01:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:19,975 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2021-01-06 16:01:19,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:01:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2021-01-06 16:01:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 16:01:19,976 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:19,977 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:20,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:01:20,191 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash -948061599, now seen corresponding path program 37 times [2021-01-06 16:01:20,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:20,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897773033] [2021-01-06 16:01:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:20,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897773033] [2021-01-06 16:01:20,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910956562] [2021-01-06 16:01:20,945 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 [2021-01-06 16:01:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:21,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:01:21,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:21,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:21,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:01:21,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546860690] [2021-01-06 16:01:21,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:01:21,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:21,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:01:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:01:21,175 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand 41 states. [2021-01-06 16:01:21,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:21,391 INFO L93 Difference]: Finished difference Result 205 states and 244 transitions. [2021-01-06 16:01:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:01:21,391 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 154 [2021-01-06 16:01:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:21,393 INFO L225 Difference]: With dead ends: 205 [2021-01-06 16:01:21,393 INFO L226 Difference]: Without dead ends: 201 [2021-01-06 16:01:21,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:01:21,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-01-06 16:01:21,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2021-01-06 16:01:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2021-01-06 16:01:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 235 transitions. [2021-01-06 16:01:21,399 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 235 transitions. Word has length 154 [2021-01-06 16:01:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:21,400 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 235 transitions. [2021-01-06 16:01:21,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:01:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 235 transitions. [2021-01-06 16:01:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 16:01:21,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:21,401 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:21,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:01:21,617 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -444156849, now seen corresponding path program 38 times [2021-01-06 16:01:21,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:21,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960957082] [2021-01-06 16:01:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960957082] [2021-01-06 16:01:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426792697] [2021-01-06 16:01:22,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:22,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:22,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:22,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:01:22,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:22,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:22,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:01:22,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258838029] [2021-01-06 16:01:22,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:01:22,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:22,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:01:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:01:22,653 INFO L87 Difference]: Start difference. First operand 197 states and 235 transitions. Second operand 42 states. [2021-01-06 16:01:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:22,826 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2021-01-06 16:01:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:01:22,827 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2021-01-06 16:01:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:22,829 INFO L225 Difference]: With dead ends: 210 [2021-01-06 16:01:22,829 INFO L226 Difference]: Without dead ends: 206 [2021-01-06 16:01:22,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:01:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-01-06 16:01:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2021-01-06 16:01:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2021-01-06 16:01:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2021-01-06 16:01:22,835 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 158 [2021-01-06 16:01:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:22,835 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2021-01-06 16:01:22,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:01:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2021-01-06 16:01:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-01-06 16:01:22,837 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:22,837 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:23,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:01:23,051 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:23,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:23,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2121988291, now seen corresponding path program 39 times [2021-01-06 16:01:23,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:23,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425330830] [2021-01-06 16:01:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:23,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425330830] [2021-01-06 16:01:23,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195779863] [2021-01-06 16:01:23,837 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 [2021-01-06 16:01:23,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-01-06 16:01:23,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:23,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:01:23,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:24,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:24,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:01:24,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700132645] [2021-01-06 16:01:24,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:01:24,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:01:24,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:01:24,148 INFO L87 Difference]: Start difference. First operand 202 states and 241 transitions. Second operand 43 states. [2021-01-06 16:01:24,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:24,386 INFO L93 Difference]: Finished difference Result 215 states and 256 transitions. [2021-01-06 16:01:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:01:24,386 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 162 [2021-01-06 16:01:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:24,388 INFO L225 Difference]: With dead ends: 215 [2021-01-06 16:01:24,388 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 16:01:24,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:01:24,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 16:01:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2021-01-06 16:01:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 16:01:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 247 transitions. [2021-01-06 16:01:24,394 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 247 transitions. Word has length 162 [2021-01-06 16:01:24,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:24,395 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 247 transitions. [2021-01-06 16:01:24,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:01:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 247 transitions. [2021-01-06 16:01:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 16:01:24,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:24,396 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:24,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:01:24,611 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:24,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2133078827, now seen corresponding path program 40 times [2021-01-06 16:01:24,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:24,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726981136] [2021-01-06 16:01:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:25,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726981136] [2021-01-06 16:01:25,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607725443] [2021-01-06 16:01:25,458 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 [2021-01-06 16:01:25,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:25,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:25,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:01:25,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:25,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:25,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:01:25,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917324571] [2021-01-06 16:01:25,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:01:25,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:25,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:01:25,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:01:25,681 INFO L87 Difference]: Start difference. First operand 207 states and 247 transitions. Second operand 44 states. [2021-01-06 16:01:25,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:25,862 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2021-01-06 16:01:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:01:25,863 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 166 [2021-01-06 16:01:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:25,865 INFO L225 Difference]: With dead ends: 220 [2021-01-06 16:01:25,865 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 16:01:25,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:01:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 16:01:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2021-01-06 16:01:25,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2021-01-06 16:01:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 253 transitions. [2021-01-06 16:01:25,871 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 253 transitions. Word has length 166 [2021-01-06 16:01:25,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:25,871 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 253 transitions. [2021-01-06 16:01:25,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:01:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 253 transitions. [2021-01-06 16:01:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-01-06 16:01:25,873 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:25,873 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:26,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:26,086 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:26,087 INFO L82 PathProgramCache]: Analyzing trace with hash 5224473, now seen corresponding path program 41 times [2021-01-06 16:01:26,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:26,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358792828] [2021-01-06 16:01:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:27,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358792828] [2021-01-06 16:01:27,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389633476] [2021-01-06 16:01:27,099 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 [2021-01-06 16:01:27,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:01:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:01:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:27,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:27,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:01:27,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230038446] [2021-01-06 16:01:27,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:01:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:27,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:01:27,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:01:27,363 INFO L87 Difference]: Start difference. First operand 212 states and 253 transitions. Second operand 45 states. [2021-01-06 16:01:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:27,556 INFO L93 Difference]: Finished difference Result 225 states and 268 transitions. [2021-01-06 16:01:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:01:27,556 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 170 [2021-01-06 16:01:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:27,558 INFO L225 Difference]: With dead ends: 225 [2021-01-06 16:01:27,558 INFO L226 Difference]: Without dead ends: 221 [2021-01-06 16:01:27,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:01:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-01-06 16:01:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2021-01-06 16:01:27,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 16:01:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 259 transitions. [2021-01-06 16:01:27,565 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 259 transitions. Word has length 170 [2021-01-06 16:01:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:27,566 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 259 transitions. [2021-01-06 16:01:27,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:01:27,566 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 259 transitions. [2021-01-06 16:01:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-01-06 16:01:27,567 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:27,567 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:27,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 16:01:27,782 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:27,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1160975879, now seen corresponding path program 42 times [2021-01-06 16:01:27,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:27,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428293225] [2021-01-06 16:01:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:28,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428293225] [2021-01-06 16:01:28,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544282628] [2021-01-06 16:01:28,756 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 [2021-01-06 16:01:28,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-01-06 16:01:28,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:01:28,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:29,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:29,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:01:29,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721793211] [2021-01-06 16:01:29,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:01:29,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:29,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:01:29,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:01:29,052 INFO L87 Difference]: Start difference. First operand 217 states and 259 transitions. Second operand 46 states. [2021-01-06 16:01:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:29,250 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2021-01-06 16:01:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:01:29,250 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 174 [2021-01-06 16:01:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:29,252 INFO L225 Difference]: With dead ends: 230 [2021-01-06 16:01:29,252 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 16:01:29,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:01:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 16:01:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2021-01-06 16:01:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2021-01-06 16:01:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 265 transitions. [2021-01-06 16:01:29,259 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 265 transitions. Word has length 174 [2021-01-06 16:01:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:29,259 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 265 transitions. [2021-01-06 16:01:29,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:01:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 265 transitions. [2021-01-06 16:01:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 16:01:29,260 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:29,261 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:29,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:29,473 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:29,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1942369035, now seen corresponding path program 43 times [2021-01-06 16:01:29,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:29,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257693773] [2021-01-06 16:01:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:30,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257693773] [2021-01-06 16:01:30,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304830157] [2021-01-06 16:01:30,527 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 [2021-01-06 16:01:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:01:30,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:30,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:30,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:01:30,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000288726] [2021-01-06 16:01:30,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:01:30,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:30,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:01:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:01:30,786 INFO L87 Difference]: Start difference. First operand 222 states and 265 transitions. Second operand 47 states. [2021-01-06 16:01:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:31,053 INFO L93 Difference]: Finished difference Result 235 states and 280 transitions. [2021-01-06 16:01:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:01:31,053 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 178 [2021-01-06 16:01:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:31,054 INFO L225 Difference]: With dead ends: 235 [2021-01-06 16:01:31,054 INFO L226 Difference]: Without dead ends: 231 [2021-01-06 16:01:31,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:01:31,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-01-06 16:01:31,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2021-01-06 16:01:31,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2021-01-06 16:01:31,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-01-06 16:01:31,059 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 178 [2021-01-06 16:01:31,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:31,059 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-01-06 16:01:31,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:01:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-01-06 16:01:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-01-06 16:01:31,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:31,060 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:31,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:31,261 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash -233874205, now seen corresponding path program 44 times [2021-01-06 16:01:31,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:31,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929583980] [2021-01-06 16:01:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:32,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:32,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929583980] [2021-01-06 16:01:32,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422516461] [2021-01-06 16:01:32,303 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 [2021-01-06 16:01:32,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:32,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:01:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:32,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:32,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 16:01:32,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201577019] [2021-01-06 16:01:32,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:01:32,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:32,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:01:32,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:01:32,561 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand 48 states. [2021-01-06 16:01:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:32,785 INFO L93 Difference]: Finished difference Result 240 states and 286 transitions. [2021-01-06 16:01:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:01:32,785 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 182 [2021-01-06 16:01:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:32,787 INFO L225 Difference]: With dead ends: 240 [2021-01-06 16:01:32,787 INFO L226 Difference]: Without dead ends: 236 [2021-01-06 16:01:32,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:01:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-01-06 16:01:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-01-06 16:01:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2021-01-06 16:01:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2021-01-06 16:01:32,794 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 182 [2021-01-06 16:01:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:32,794 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2021-01-06 16:01:32,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:01:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2021-01-06 16:01:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 16:01:32,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:32,795 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:33,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 16:01:33,010 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1369392593, now seen corresponding path program 45 times [2021-01-06 16:01:33,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:33,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140766789] [2021-01-06 16:01:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140766789] [2021-01-06 16:01:34,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280897067] [2021-01-06 16:01:34,158 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 [2021-01-06 16:01:34,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 16:01:34,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:01:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:34,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:34,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:01:34,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661014737] [2021-01-06 16:01:34,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:01:34,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:34,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:01:34,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:01:34,524 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand 49 states. [2021-01-06 16:01:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:34,777 INFO L93 Difference]: Finished difference Result 245 states and 292 transitions. [2021-01-06 16:01:34,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:01:34,777 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 186 [2021-01-06 16:01:34,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:34,778 INFO L225 Difference]: With dead ends: 245 [2021-01-06 16:01:34,779 INFO L226 Difference]: Without dead ends: 241 [2021-01-06 16:01:34,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:01:34,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-01-06 16:01:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2021-01-06 16:01:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2021-01-06 16:01:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 283 transitions. [2021-01-06 16:01:34,785 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 283 transitions. Word has length 186 [2021-01-06 16:01:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:34,786 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 283 transitions. [2021-01-06 16:01:34,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:01:34,786 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 283 transitions. [2021-01-06 16:01:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 16:01:34,787 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:34,787 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:35,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:01:35,001 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:35,001 INFO L82 PathProgramCache]: Analyzing trace with hash 605358015, now seen corresponding path program 46 times [2021-01-06 16:01:35,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:35,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936643180] [2021-01-06 16:01:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:36,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936643180] [2021-01-06 16:01:36,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724784334] [2021-01-06 16:01:36,183 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 [2021-01-06 16:01:36,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:36,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:36,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:01:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:36,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:36,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 16:01:36,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954754987] [2021-01-06 16:01:36,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:01:36,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:36,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:01:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:01:36,453 INFO L87 Difference]: Start difference. First operand 237 states and 283 transitions. Second operand 50 states. [2021-01-06 16:01:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:36,754 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2021-01-06 16:01:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:01:36,759 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 190 [2021-01-06 16:01:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:36,761 INFO L225 Difference]: With dead ends: 250 [2021-01-06 16:01:36,761 INFO L226 Difference]: Without dead ends: 246 [2021-01-06 16:01:36,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:01:36,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-01-06 16:01:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2021-01-06 16:01:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2021-01-06 16:01:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 289 transitions. [2021-01-06 16:01:36,768 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 289 transitions. Word has length 190 [2021-01-06 16:01:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:36,768 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 289 transitions. [2021-01-06 16:01:36,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:01:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 289 transitions. [2021-01-06 16:01:36,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 16:01:36,769 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:36,770 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:36,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:01:36,986 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:36,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1625039533, now seen corresponding path program 47 times [2021-01-06 16:01:36,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:36,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905451119] [2021-01-06 16:01:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:38,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905451119] [2021-01-06 16:01:38,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032512305] [2021-01-06 16:01:38,188 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 [2021-01-06 16:01:38,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-01-06 16:01:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:38,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:01:38,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:38,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:38,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:01:38,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840605713] [2021-01-06 16:01:38,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:01:38,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:01:38,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:01:38,493 INFO L87 Difference]: Start difference. First operand 242 states and 289 transitions. Second operand 51 states. [2021-01-06 16:01:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:38,885 INFO L93 Difference]: Finished difference Result 255 states and 304 transitions. [2021-01-06 16:01:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:01:38,886 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 194 [2021-01-06 16:01:38,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:38,888 INFO L225 Difference]: With dead ends: 255 [2021-01-06 16:01:38,888 INFO L226 Difference]: Without dead ends: 251 [2021-01-06 16:01:38,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:01:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-01-06 16:01:38,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2021-01-06 16:01:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2021-01-06 16:01:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 295 transitions. [2021-01-06 16:01:38,894 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 295 transitions. Word has length 194 [2021-01-06 16:01:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:38,894 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 295 transitions. [2021-01-06 16:01:38,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:01:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 295 transitions. [2021-01-06 16:01:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-01-06 16:01:38,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:38,896 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:39,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:39,110 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1570772635, now seen corresponding path program 48 times [2021-01-06 16:01:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:39,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613941647] [2021-01-06 16:01:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:40,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613941647] [2021-01-06 16:01:40,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879374354] [2021-01-06 16:01:40,392 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 [2021-01-06 16:01:40,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-01-06 16:01:40,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:40,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:01:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:40,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:40,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 16:01:40,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140813230] [2021-01-06 16:01:40,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:01:40,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:01:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:01:40,719 INFO L87 Difference]: Start difference. First operand 247 states and 295 transitions. Second operand 52 states. [2021-01-06 16:01:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:40,990 INFO L93 Difference]: Finished difference Result 260 states and 310 transitions. [2021-01-06 16:01:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:01:40,990 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 198 [2021-01-06 16:01:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:40,992 INFO L225 Difference]: With dead ends: 260 [2021-01-06 16:01:40,992 INFO L226 Difference]: Without dead ends: 256 [2021-01-06 16:01:40,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:01:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-01-06 16:01:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2021-01-06 16:01:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2021-01-06 16:01:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 301 transitions. [2021-01-06 16:01:40,998 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 301 transitions. Word has length 198 [2021-01-06 16:01:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:40,999 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 301 transitions. [2021-01-06 16:01:40,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:01:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 301 transitions. [2021-01-06 16:01:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-01-06 16:01:41,000 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:41,000 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:41,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:01:41,215 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:41,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:41,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1370725495, now seen corresponding path program 49 times [2021-01-06 16:01:41,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:41,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437064345] [2021-01-06 16:01:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:42,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437064345] [2021-01-06 16:01:42,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117251593] [2021-01-06 16:01:42,538 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 [2021-01-06 16:01:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:42,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:01:42,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:42,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:42,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:01:42,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805925066] [2021-01-06 16:01:42,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:01:42,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:42,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:01:42,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:01:42,800 INFO L87 Difference]: Start difference. First operand 252 states and 301 transitions. Second operand 53 states. [2021-01-06 16:01:43,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:43,062 INFO L93 Difference]: Finished difference Result 265 states and 316 transitions. [2021-01-06 16:01:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:01:43,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 202 [2021-01-06 16:01:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:43,068 INFO L225 Difference]: With dead ends: 265 [2021-01-06 16:01:43,068 INFO L226 Difference]: Without dead ends: 261 [2021-01-06 16:01:43,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:01:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-01-06 16:01:43,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2021-01-06 16:01:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-01-06 16:01:43,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 307 transitions. [2021-01-06 16:01:43,077 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 307 transitions. Word has length 202 [2021-01-06 16:01:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:43,078 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 307 transitions. [2021-01-06 16:01:43,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:01:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 307 transitions. [2021-01-06 16:01:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-01-06 16:01:43,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:43,080 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:43,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:01:43,295 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:43,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:43,296 INFO L82 PathProgramCache]: Analyzing trace with hash 84707703, now seen corresponding path program 50 times [2021-01-06 16:01:43,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:43,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212714256] [2021-01-06 16:01:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:44,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212714256] [2021-01-06 16:01:44,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087308701] [2021-01-06 16:01:44,761 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 [2021-01-06 16:01:44,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:44,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:01:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:45,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:45,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 16:01:45,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389948157] [2021-01-06 16:01:45,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:01:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:01:45,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:01:45,025 INFO L87 Difference]: Start difference. First operand 257 states and 307 transitions. Second operand 54 states. [2021-01-06 16:01:45,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:45,313 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2021-01-06 16:01:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:01:45,314 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 206 [2021-01-06 16:01:45,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:45,317 INFO L225 Difference]: With dead ends: 270 [2021-01-06 16:01:45,317 INFO L226 Difference]: Without dead ends: 266 [2021-01-06 16:01:45,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:01:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-01-06 16:01:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2021-01-06 16:01:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2021-01-06 16:01:45,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 313 transitions. [2021-01-06 16:01:45,330 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 313 transitions. Word has length 206 [2021-01-06 16:01:45,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:45,330 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 313 transitions. [2021-01-06 16:01:45,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:01:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 313 transitions. [2021-01-06 16:01:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-01-06 16:01:45,333 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:45,333 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:45,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:45,548 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash 306972773, now seen corresponding path program 51 times [2021-01-06 16:01:45,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:45,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790850398] [2021-01-06 16:01:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790850398] [2021-01-06 16:01:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352648750] [2021-01-06 16:01:46,889 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 [2021-01-06 16:01:47,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-01-06 16:01:47,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:01:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:47,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:47,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:01:47,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761818779] [2021-01-06 16:01:47,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:01:47,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:47,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:01:47,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:01:47,258 INFO L87 Difference]: Start difference. First operand 262 states and 313 transitions. Second operand 55 states. [2021-01-06 16:01:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:47,642 INFO L93 Difference]: Finished difference Result 275 states and 328 transitions. [2021-01-06 16:01:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:01:47,642 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 210 [2021-01-06 16:01:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:47,644 INFO L225 Difference]: With dead ends: 275 [2021-01-06 16:01:47,644 INFO L226 Difference]: Without dead ends: 271 [2021-01-06 16:01:47,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:01:47,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-01-06 16:01:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2021-01-06 16:01:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2021-01-06 16:01:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 319 transitions. [2021-01-06 16:01:47,650 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 319 transitions. Word has length 210 [2021-01-06 16:01:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:47,651 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 319 transitions. [2021-01-06 16:01:47,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:01:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 319 transitions. [2021-01-06 16:01:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-01-06 16:01:47,652 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:47,652 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:47,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 16:01:47,868 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:47,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1689673811, now seen corresponding path program 52 times [2021-01-06 16:01:47,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:47,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586769917] [2021-01-06 16:01:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:49,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586769917] [2021-01-06 16:01:49,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882767901] [2021-01-06 16:01:49,374 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 [2021-01-06 16:01:49,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:01:49,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:49,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:01:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:49,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:49,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 16:01:49,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024389892] [2021-01-06 16:01:49,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:01:49,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:01:49,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:01:49,685 INFO L87 Difference]: Start difference. First operand 267 states and 319 transitions. Second operand 56 states. [2021-01-06 16:01:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:50,057 INFO L93 Difference]: Finished difference Result 280 states and 334 transitions. [2021-01-06 16:01:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:01:50,058 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 214 [2021-01-06 16:01:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:50,059 INFO L225 Difference]: With dead ends: 280 [2021-01-06 16:01:50,060 INFO L226 Difference]: Without dead ends: 276 [2021-01-06 16:01:50,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:01:50,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-01-06 16:01:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2021-01-06 16:01:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2021-01-06 16:01:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 325 transitions. [2021-01-06 16:01:50,066 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 325 transitions. Word has length 214 [2021-01-06 16:01:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:50,067 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 325 transitions. [2021-01-06 16:01:50,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:01:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 325 transitions. [2021-01-06 16:01:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-01-06 16:01:50,068 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:50,068 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:50,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:50,283 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1228345665, now seen corresponding path program 53 times [2021-01-06 16:01:50,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:50,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102722213] [2021-01-06 16:01:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102722213] [2021-01-06 16:01:51,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932892226] [2021-01-06 16:01:51,748 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 [2021-01-06 16:01:51,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-01-06 16:01:51,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:51,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:01:51,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:52,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:52,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 16:01:52,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104720929] [2021-01-06 16:01:52,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:01:52,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:52,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:01:52,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:01:52,065 INFO L87 Difference]: Start difference. First operand 272 states and 325 transitions. Second operand 57 states. [2021-01-06 16:01:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:52,423 INFO L93 Difference]: Finished difference Result 285 states and 340 transitions. [2021-01-06 16:01:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:01:52,423 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 218 [2021-01-06 16:01:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:52,425 INFO L225 Difference]: With dead ends: 285 [2021-01-06 16:01:52,425 INFO L226 Difference]: Without dead ends: 281 [2021-01-06 16:01:52,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:01:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-01-06 16:01:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2021-01-06 16:01:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2021-01-06 16:01:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 331 transitions. [2021-01-06 16:01:52,432 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 331 transitions. Word has length 218 [2021-01-06 16:01:52,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:52,432 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 331 transitions. [2021-01-06 16:01:52,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:01:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 331 transitions. [2021-01-06 16:01:52,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-01-06 16:01:52,434 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:52,434 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:52,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 16:01:52,648 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:52,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1426482385, now seen corresponding path program 54 times [2021-01-06 16:01:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:52,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286905117] [2021-01-06 16:01:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:54,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286905117] [2021-01-06 16:01:54,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720678477] [2021-01-06 16:01:54,237 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 [2021-01-06 16:01:54,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-01-06 16:01:54,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:54,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 16:01:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:54,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:54,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 16:01:54,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283821346] [2021-01-06 16:01:54,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:01:54,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:01:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:01:54,581 INFO L87 Difference]: Start difference. First operand 277 states and 331 transitions. Second operand 58 states. [2021-01-06 16:01:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:54,866 INFO L93 Difference]: Finished difference Result 290 states and 346 transitions. [2021-01-06 16:01:54,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:01:54,867 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 222 [2021-01-06 16:01:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:54,868 INFO L225 Difference]: With dead ends: 290 [2021-01-06 16:01:54,868 INFO L226 Difference]: Without dead ends: 286 [2021-01-06 16:01:54,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:01:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-01-06 16:01:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2021-01-06 16:01:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2021-01-06 16:01:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 337 transitions. [2021-01-06 16:01:54,874 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 337 transitions. Word has length 222 [2021-01-06 16:01:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:54,875 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 337 transitions. [2021-01-06 16:01:54,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:01:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 337 transitions. [2021-01-06 16:01:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-01-06 16:01:54,876 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:54,876 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:55,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 16:01:55,085 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:55,085 INFO L82 PathProgramCache]: Analyzing trace with hash -211190243, now seen corresponding path program 55 times [2021-01-06 16:01:55,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:55,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658722732] [2021-01-06 16:01:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:56,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658722732] [2021-01-06 16:01:56,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839673882] [2021-01-06 16:01:56,731 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 [2021-01-06 16:01:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:01:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:57,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:57,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-01-06 16:01:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748824105] [2021-01-06 16:01:57,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:01:57,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:01:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:01:57,047 INFO L87 Difference]: Start difference. First operand 282 states and 337 transitions. Second operand 59 states. [2021-01-06 16:01:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:01:57,343 INFO L93 Difference]: Finished difference Result 295 states and 352 transitions. [2021-01-06 16:01:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 16:01:57,344 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 226 [2021-01-06 16:01:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:01:57,345 INFO L225 Difference]: With dead ends: 295 [2021-01-06 16:01:57,345 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 16:01:57,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:01:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 16:01:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 287. [2021-01-06 16:01:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-01-06 16:01:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 343 transitions. [2021-01-06 16:01:57,351 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 343 transitions. Word has length 226 [2021-01-06 16:01:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:01:57,352 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 343 transitions. [2021-01-06 16:01:57,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:01:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 343 transitions. [2021-01-06 16:01:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-01-06 16:01:57,353 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:01:57,354 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2021-01-06 16:01:57,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:01:57,568 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:01:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:01:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash -365807093, now seen corresponding path program 56 times [2021-01-06 16:01:57,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:01:57,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214126358] [2021-01-06 16:01:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:01:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:01:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:59,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214126358] [2021-01-06 16:01:59,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408002714] [2021-01-06 16:01:59,283 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 [2021-01-06 16:01:59,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:01:59,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:01:59,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:01:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:01:59,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:01:59,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:01:59,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 16:01:59,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375174533] [2021-01-06 16:01:59,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 16:01:59,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:01:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 16:01:59,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:01:59,583 INFO L87 Difference]: Start difference. First operand 287 states and 343 transitions. Second operand 60 states. [2021-01-06 16:02:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:00,059 INFO L93 Difference]: Finished difference Result 300 states and 358 transitions. [2021-01-06 16:02:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:02:00,059 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 230 [2021-01-06 16:02:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:00,060 INFO L225 Difference]: With dead ends: 300 [2021-01-06 16:02:00,061 INFO L226 Difference]: Without dead ends: 296 [2021-01-06 16:02:00,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:02:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-01-06 16:02:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 292. [2021-01-06 16:02:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2021-01-06 16:02:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 349 transitions. [2021-01-06 16:02:00,068 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 349 transitions. Word has length 230 [2021-01-06 16:02:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:00,068 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 349 transitions. [2021-01-06 16:02:00,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 16:02:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 349 transitions. [2021-01-06 16:02:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-01-06 16:02:00,069 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:00,070 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:00,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:02:00,285 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:00,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:00,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1791013127, now seen corresponding path program 57 times [2021-01-06 16:02:00,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:00,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962725207] [2021-01-06 16:02:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962725207] [2021-01-06 16:02:02,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653502974] [2021-01-06 16:02:02,105 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 [2021-01-06 16:02:02,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-01-06 16:02:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:02,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:02:02,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:02,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:02,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-01-06 16:02:02,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256300265] [2021-01-06 16:02:02,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:02:02,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:02:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:02:02,493 INFO L87 Difference]: Start difference. First operand 292 states and 349 transitions. Second operand 61 states. [2021-01-06 16:02:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:02,886 INFO L93 Difference]: Finished difference Result 305 states and 364 transitions. [2021-01-06 16:02:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 16:02:02,886 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 234 [2021-01-06 16:02:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:02,888 INFO L225 Difference]: With dead ends: 305 [2021-01-06 16:02:02,889 INFO L226 Difference]: Without dead ends: 301 [2021-01-06 16:02:02,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:02:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-01-06 16:02:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2021-01-06 16:02:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2021-01-06 16:02:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 355 transitions. [2021-01-06 16:02:02,895 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 355 transitions. Word has length 234 [2021-01-06 16:02:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:02,896 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 355 transitions. [2021-01-06 16:02:02,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:02:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 355 transitions. [2021-01-06 16:02:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-01-06 16:02:02,897 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:02,897 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:03,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:03,111 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash 414989543, now seen corresponding path program 58 times [2021-01-06 16:02:03,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:03,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105106277] [2021-01-06 16:02:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:04,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105106277] [2021-01-06 16:02:04,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027833118] [2021-01-06 16:02:04,946 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 [2021-01-06 16:02:05,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:05,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:05,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 16:02:05,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:05,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:05,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-01-06 16:02:05,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042158251] [2021-01-06 16:02:05,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 16:02:05,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:05,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 16:02:05,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:02:05,299 INFO L87 Difference]: Start difference. First operand 297 states and 355 transitions. Second operand 62 states. [2021-01-06 16:02:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:05,813 INFO L93 Difference]: Finished difference Result 310 states and 370 transitions. [2021-01-06 16:02:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:02:05,813 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 238 [2021-01-06 16:02:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:05,815 INFO L225 Difference]: With dead ends: 310 [2021-01-06 16:02:05,815 INFO L226 Difference]: Without dead ends: 306 [2021-01-06 16:02:05,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:02:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-01-06 16:02:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 302. [2021-01-06 16:02:05,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2021-01-06 16:02:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 361 transitions. [2021-01-06 16:02:05,821 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 361 transitions. Word has length 238 [2021-01-06 16:02:05,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:05,821 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 361 transitions. [2021-01-06 16:02:05,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 16:02:05,821 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 361 transitions. [2021-01-06 16:02:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-01-06 16:02:05,822 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:05,823 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:06,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 16:02:06,034 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:06,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1760263211, now seen corresponding path program 59 times [2021-01-06 16:02:06,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:06,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928230734] [2021-01-06 16:02:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:07,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928230734] [2021-01-06 16:02:07,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427405690] [2021-01-06 16:02:07,995 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 [2021-01-06 16:02:08,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-01-06 16:02:08,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:08,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:02:08,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:08,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:08,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 16:02:08,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747394475] [2021-01-06 16:02:08,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 16:02:08,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:08,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 16:02:08,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:02:08,390 INFO L87 Difference]: Start difference. First operand 302 states and 361 transitions. Second operand 63 states. [2021-01-06 16:02:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:08,853 INFO L93 Difference]: Finished difference Result 315 states and 376 transitions. [2021-01-06 16:02:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:02:08,854 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 242 [2021-01-06 16:02:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:08,855 INFO L225 Difference]: With dead ends: 315 [2021-01-06 16:02:08,855 INFO L226 Difference]: Without dead ends: 311 [2021-01-06 16:02:08,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:02:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-01-06 16:02:08,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2021-01-06 16:02:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2021-01-06 16:02:08,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 367 transitions. [2021-01-06 16:02:08,861 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 367 transitions. Word has length 242 [2021-01-06 16:02:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:08,862 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 367 transitions. [2021-01-06 16:02:08,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 16:02:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 367 transitions. [2021-01-06 16:02:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-01-06 16:02:08,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:08,863 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:09,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:02:09,077 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash 284402627, now seen corresponding path program 60 times [2021-01-06 16:02:09,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:09,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574209033] [2021-01-06 16:02:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:11,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574209033] [2021-01-06 16:02:11,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095670309] [2021-01-06 16:02:11,072 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 [2021-01-06 16:02:11,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-01-06 16:02:11,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 16:02:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:11,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:11,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 16:02:11,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243691525] [2021-01-06 16:02:11,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 16:02:11,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 16:02:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:02:11,495 INFO L87 Difference]: Start difference. First operand 307 states and 367 transitions. Second operand 64 states. [2021-01-06 16:02:11,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:11,932 INFO L93 Difference]: Finished difference Result 320 states and 382 transitions. [2021-01-06 16:02:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:02:11,932 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 246 [2021-01-06 16:02:11,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:11,934 INFO L225 Difference]: With dead ends: 320 [2021-01-06 16:02:11,934 INFO L226 Difference]: Without dead ends: 316 [2021-01-06 16:02:11,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:02:11,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-01-06 16:02:11,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2021-01-06 16:02:11,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2021-01-06 16:02:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 373 transitions. [2021-01-06 16:02:11,942 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 373 transitions. Word has length 246 [2021-01-06 16:02:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:11,942 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 373 transitions. [2021-01-06 16:02:11,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 16:02:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 373 transitions. [2021-01-06 16:02:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-01-06 16:02:11,945 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:11,945 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:12,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:12,160 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1162157233, now seen corresponding path program 61 times [2021-01-06 16:02:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:12,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425131760] [2021-01-06 16:02:12,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:14,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425131760] [2021-01-06 16:02:14,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50703875] [2021-01-06 16:02:14,247 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 [2021-01-06 16:02:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 16:02:14,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:14,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:14,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-01-06 16:02:14,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163516047] [2021-01-06 16:02:14,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 16:02:14,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:14,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 16:02:14,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:02:14,578 INFO L87 Difference]: Start difference. First operand 312 states and 373 transitions. Second operand 65 states. [2021-01-06 16:02:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:14,920 INFO L93 Difference]: Finished difference Result 325 states and 388 transitions. [2021-01-06 16:02:14,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 16:02:14,920 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 250 [2021-01-06 16:02:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:14,921 INFO L225 Difference]: With dead ends: 325 [2021-01-06 16:02:14,922 INFO L226 Difference]: Without dead ends: 321 [2021-01-06 16:02:14,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:02:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-01-06 16:02:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2021-01-06 16:02:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2021-01-06 16:02:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 379 transitions. [2021-01-06 16:02:14,926 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 379 transitions. Word has length 250 [2021-01-06 16:02:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:14,926 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 379 transitions. [2021-01-06 16:02:14,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 16:02:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 379 transitions. [2021-01-06 16:02:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-01-06 16:02:14,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:14,928 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:15,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:15,142 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1858834785, now seen corresponding path program 62 times [2021-01-06 16:02:15,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:15,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423001630] [2021-01-06 16:02:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:17,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423001630] [2021-01-06 16:02:17,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307090156] [2021-01-06 16:02:17,268 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 [2021-01-06 16:02:17,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:17,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 16:02:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:17,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:17,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 16:02:17,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598708547] [2021-01-06 16:02:17,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 16:02:17,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 16:02:17,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:02:17,618 INFO L87 Difference]: Start difference. First operand 317 states and 379 transitions. Second operand 66 states. [2021-01-06 16:02:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:18,141 INFO L93 Difference]: Finished difference Result 330 states and 394 transitions. [2021-01-06 16:02:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:02:18,142 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 254 [2021-01-06 16:02:18,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:18,143 INFO L225 Difference]: With dead ends: 330 [2021-01-06 16:02:18,143 INFO L226 Difference]: Without dead ends: 326 [2021-01-06 16:02:18,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:02:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-01-06 16:02:18,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2021-01-06 16:02:18,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2021-01-06 16:02:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 385 transitions. [2021-01-06 16:02:18,149 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 385 transitions. Word has length 254 [2021-01-06 16:02:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:18,149 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 385 transitions. [2021-01-06 16:02:18,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 16:02:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 385 transitions. [2021-01-06 16:02:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-01-06 16:02:18,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:18,151 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:18,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:18,367 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash -802350707, now seen corresponding path program 63 times [2021-01-06 16:02:18,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:18,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626849443] [2021-01-06 16:02:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:20,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626849443] [2021-01-06 16:02:20,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10663404] [2021-01-06 16:02:20,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:20,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-01-06 16:02:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:20,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:02:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:21,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:21,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-01-06 16:02:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163480844] [2021-01-06 16:02:21,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:02:21,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:02:21,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:02:21,040 INFO L87 Difference]: Start difference. First operand 322 states and 385 transitions. Second operand 67 states. [2021-01-06 16:02:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:21,491 INFO L93 Difference]: Finished difference Result 335 states and 400 transitions. [2021-01-06 16:02:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:02:21,491 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 258 [2021-01-06 16:02:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:21,493 INFO L225 Difference]: With dead ends: 335 [2021-01-06 16:02:21,493 INFO L226 Difference]: Without dead ends: 331 [2021-01-06 16:02:21,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:02:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-01-06 16:02:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2021-01-06 16:02:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2021-01-06 16:02:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 391 transitions. [2021-01-06 16:02:21,499 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 391 transitions. Word has length 258 [2021-01-06 16:02:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:21,499 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 391 transitions. [2021-01-06 16:02:21,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:02:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 391 transitions. [2021-01-06 16:02:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-01-06 16:02:21,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:21,501 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:21,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:21,714 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:21,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1004182907, now seen corresponding path program 64 times [2021-01-06 16:02:21,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:21,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450712840] [2021-01-06 16:02:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:24,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450712840] [2021-01-06 16:02:24,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168264331] [2021-01-06 16:02:24,003 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 [2021-01-06 16:02:24,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:24,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:24,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:02:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:24,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:24,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-01-06 16:02:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678504231] [2021-01-06 16:02:24,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 16:02:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:24,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 16:02:24,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:02:24,416 INFO L87 Difference]: Start difference. First operand 327 states and 391 transitions. Second operand 68 states. [2021-01-06 16:02:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:25,068 INFO L93 Difference]: Finished difference Result 340 states and 406 transitions. [2021-01-06 16:02:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 16:02:25,069 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 262 [2021-01-06 16:02:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:25,070 INFO L225 Difference]: With dead ends: 340 [2021-01-06 16:02:25,070 INFO L226 Difference]: Without dead ends: 336 [2021-01-06 16:02:25,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:02:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-01-06 16:02:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 332. [2021-01-06 16:02:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2021-01-06 16:02:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 397 transitions. [2021-01-06 16:02:25,076 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 397 transitions. Word has length 262 [2021-01-06 16:02:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:25,076 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 397 transitions. [2021-01-06 16:02:25,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 16:02:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 397 transitions. [2021-01-06 16:02:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-01-06 16:02:25,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:25,078 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:25,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:25,292 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:25,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1277721193, now seen corresponding path program 65 times [2021-01-06 16:02:25,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:25,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208053803] [2021-01-06 16:02:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:27,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208053803] [2021-01-06 16:02:27,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759749279] [2021-01-06 16:02:27,630 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 [2021-01-06 16:02:27,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-01-06 16:02:27,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:27,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:02:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:28,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:28,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-01-06 16:02:28,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339491534] [2021-01-06 16:02:28,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 16:02:28,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:28,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 16:02:28,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:02:28,042 INFO L87 Difference]: Start difference. First operand 332 states and 397 transitions. Second operand 69 states. [2021-01-06 16:02:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:28,578 INFO L93 Difference]: Finished difference Result 345 states and 412 transitions. [2021-01-06 16:02:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:02:28,579 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 266 [2021-01-06 16:02:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:28,580 INFO L225 Difference]: With dead ends: 345 [2021-01-06 16:02:28,580 INFO L226 Difference]: Without dead ends: 341 [2021-01-06 16:02:28,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:02:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-01-06 16:02:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 337. [2021-01-06 16:02:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2021-01-06 16:02:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions. [2021-01-06 16:02:28,586 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 266 [2021-01-06 16:02:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:28,586 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions. [2021-01-06 16:02:28,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 16:02:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions. [2021-01-06 16:02:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-01-06 16:02:28,588 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:28,588 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:28,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 16:02:28,804 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:28,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1757269929, now seen corresponding path program 66 times [2021-01-06 16:02:28,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:28,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86587051] [2021-01-06 16:02:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:31,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86587051] [2021-01-06 16:02:31,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109197165] [2021-01-06 16:02:31,228 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 [2021-01-06 16:02:31,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-01-06 16:02:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:31,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 16:02:31,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:31,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:31,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 16:02:31,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861833298] [2021-01-06 16:02:31,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 16:02:31,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 16:02:31,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:02:31,683 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand 70 states. [2021-01-06 16:02:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:32,291 INFO L93 Difference]: Finished difference Result 350 states and 418 transitions. [2021-01-06 16:02:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:02:32,291 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 270 [2021-01-06 16:02:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:32,292 INFO L225 Difference]: With dead ends: 350 [2021-01-06 16:02:32,292 INFO L226 Difference]: Without dead ends: 346 [2021-01-06 16:02:32,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:02:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-01-06 16:02:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2021-01-06 16:02:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2021-01-06 16:02:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 409 transitions. [2021-01-06 16:02:32,297 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 409 transitions. Word has length 270 [2021-01-06 16:02:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:32,297 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 409 transitions. [2021-01-06 16:02:32,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 16:02:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 409 transitions. [2021-01-06 16:02:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-01-06 16:02:32,298 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:32,299 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:32,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:02:32,514 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1315750075, now seen corresponding path program 67 times [2021-01-06 16:02:32,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:32,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702876677] [2021-01-06 16:02:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:34,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702876677] [2021-01-06 16:02:34,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628215417] [2021-01-06 16:02:34,988 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 [2021-01-06 16:02:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:35,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:02:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:35,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:35,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-01-06 16:02:35,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398215406] [2021-01-06 16:02:35,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 16:02:35,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:35,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 16:02:35,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:02:35,398 INFO L87 Difference]: Start difference. First operand 342 states and 409 transitions. Second operand 71 states. [2021-01-06 16:02:35,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:35,953 INFO L93 Difference]: Finished difference Result 355 states and 424 transitions. [2021-01-06 16:02:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 16:02:35,953 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 274 [2021-01-06 16:02:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:35,954 INFO L225 Difference]: With dead ends: 355 [2021-01-06 16:02:35,954 INFO L226 Difference]: Without dead ends: 351 [2021-01-06 16:02:35,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:02:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-01-06 16:02:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 347. [2021-01-06 16:02:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2021-01-06 16:02:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 415 transitions. [2021-01-06 16:02:35,960 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 415 transitions. Word has length 274 [2021-01-06 16:02:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:35,961 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 415 transitions. [2021-01-06 16:02:35,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 16:02:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 415 transitions. [2021-01-06 16:02:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-01-06 16:02:35,963 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:35,963 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:36,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:36,177 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash 231155507, now seen corresponding path program 68 times [2021-01-06 16:02:36,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:36,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145656281] [2021-01-06 16:02:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:38,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145656281] [2021-01-06 16:02:38,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069240055] [2021-01-06 16:02:38,766 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 [2021-01-06 16:02:38,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:38,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:38,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:02:38,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:39,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:39,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 16:02:39,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175100691] [2021-01-06 16:02:39,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 16:02:39,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:39,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 16:02:39,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:02:39,131 INFO L87 Difference]: Start difference. First operand 347 states and 415 transitions. Second operand 72 states. [2021-01-06 16:02:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:39,736 INFO L93 Difference]: Finished difference Result 360 states and 430 transitions. [2021-01-06 16:02:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:02:39,736 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 278 [2021-01-06 16:02:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:39,738 INFO L225 Difference]: With dead ends: 360 [2021-01-06 16:02:39,738 INFO L226 Difference]: Without dead ends: 356 [2021-01-06 16:02:39,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:02:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-01-06 16:02:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2021-01-06 16:02:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2021-01-06 16:02:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 421 transitions. [2021-01-06 16:02:39,742 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 421 transitions. Word has length 278 [2021-01-06 16:02:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:39,742 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 421 transitions. [2021-01-06 16:02:39,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 16:02:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 421 transitions. [2021-01-06 16:02:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-01-06 16:02:39,744 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:39,744 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:39,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 16:02:39,945 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash -590780383, now seen corresponding path program 69 times [2021-01-06 16:02:39,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:39,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733987544] [2021-01-06 16:02:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:42,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733987544] [2021-01-06 16:02:42,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021419298] [2021-01-06 16:02:42,558 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 [2021-01-06 16:02:42,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-01-06 16:02:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:42,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:02:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:42,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:42,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-01-06 16:02:42,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070165643] [2021-01-06 16:02:42,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 16:02:42,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:42,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 16:02:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:02:42,990 INFO L87 Difference]: Start difference. First operand 352 states and 421 transitions. Second operand 73 states. [2021-01-06 16:02:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:43,713 INFO L93 Difference]: Finished difference Result 365 states and 436 transitions. [2021-01-06 16:02:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 16:02:43,714 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 282 [2021-01-06 16:02:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:43,715 INFO L225 Difference]: With dead ends: 365 [2021-01-06 16:02:43,715 INFO L226 Difference]: Without dead ends: 361 [2021-01-06 16:02:43,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:02:43,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-01-06 16:02:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 357. [2021-01-06 16:02:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2021-01-06 16:02:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 427 transitions. [2021-01-06 16:02:43,720 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 427 transitions. Word has length 282 [2021-01-06 16:02:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:43,720 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 427 transitions. [2021-01-06 16:02:43,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 16:02:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 427 transitions. [2021-01-06 16:02:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-01-06 16:02:43,721 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:43,722 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:43,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 16:02:43,923 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash -305823217, now seen corresponding path program 70 times [2021-01-06 16:02:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:43,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876931974] [2021-01-06 16:02:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:46,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876931974] [2021-01-06 16:02:46,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991014137] [2021-01-06 16:02:46,626 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 [2021-01-06 16:02:46,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:46,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 16:02:46,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:47,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:47,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-01-06 16:02:47,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620847980] [2021-01-06 16:02:47,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 16:02:47,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:47,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 16:02:47,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:02:47,065 INFO L87 Difference]: Start difference. First operand 357 states and 427 transitions. Second operand 74 states. [2021-01-06 16:02:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:47,754 INFO L93 Difference]: Finished difference Result 370 states and 442 transitions. [2021-01-06 16:02:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 16:02:47,755 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 286 [2021-01-06 16:02:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:47,756 INFO L225 Difference]: With dead ends: 370 [2021-01-06 16:02:47,756 INFO L226 Difference]: Without dead ends: 366 [2021-01-06 16:02:47,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:02:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-01-06 16:02:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2021-01-06 16:02:47,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2021-01-06 16:02:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 433 transitions. [2021-01-06 16:02:47,761 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 433 transitions. Word has length 286 [2021-01-06 16:02:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:47,761 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 433 transitions. [2021-01-06 16:02:47,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 16:02:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 433 transitions. [2021-01-06 16:02:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-01-06 16:02:47,762 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:47,762 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:47,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-01-06 16:02:47,963 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:47,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1910049539, now seen corresponding path program 71 times [2021-01-06 16:02:47,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:47,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330199529] [2021-01-06 16:02:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:50,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330199529] [2021-01-06 16:02:50,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577026659] [2021-01-06 16:02:50,728 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 [2021-01-06 16:02:50,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-01-06 16:02:50,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 16:02:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:51,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:51,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-01-06 16:02:51,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832361745] [2021-01-06 16:02:51,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:02:51,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:51,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:02:51,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:02:51,159 INFO L87 Difference]: Start difference. First operand 362 states and 433 transitions. Second operand 75 states. [2021-01-06 16:02:51,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:51,969 INFO L93 Difference]: Finished difference Result 375 states and 448 transitions. [2021-01-06 16:02:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 16:02:51,975 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 290 [2021-01-06 16:02:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:51,976 INFO L225 Difference]: With dead ends: 375 [2021-01-06 16:02:51,976 INFO L226 Difference]: Without dead ends: 371 [2021-01-06 16:02:51,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:02:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-01-06 16:02:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 367. [2021-01-06 16:02:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2021-01-06 16:02:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 439 transitions. [2021-01-06 16:02:51,982 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 439 transitions. Word has length 290 [2021-01-06 16:02:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:51,982 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 439 transitions. [2021-01-06 16:02:51,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:02:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 439 transitions. [2021-01-06 16:02:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-01-06 16:02:51,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:51,984 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:52,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:52,192 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:52,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1771651307, now seen corresponding path program 72 times [2021-01-06 16:02:52,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:52,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987186112] [2021-01-06 16:02:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:55,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987186112] [2021-01-06 16:02:55,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816114675] [2021-01-06 16:02:55,060 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 [2021-01-06 16:02:55,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-01-06 16:02:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:55,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:02:55,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:55,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:55,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-01-06 16:02:55,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647062479] [2021-01-06 16:02:55,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 16:02:55,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:55,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 16:02:55,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:02:55,591 INFO L87 Difference]: Start difference. First operand 367 states and 439 transitions. Second operand 76 states. [2021-01-06 16:02:56,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:56,277 INFO L93 Difference]: Finished difference Result 380 states and 454 transitions. [2021-01-06 16:02:56,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:02:56,277 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 294 [2021-01-06 16:02:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:56,279 INFO L225 Difference]: With dead ends: 380 [2021-01-06 16:02:56,279 INFO L226 Difference]: Without dead ends: 376 [2021-01-06 16:02:56,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:02:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-01-06 16:02:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2021-01-06 16:02:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2021-01-06 16:02:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 445 transitions. [2021-01-06 16:02:56,283 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 445 transitions. Word has length 294 [2021-01-06 16:02:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:56,283 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 445 transitions. [2021-01-06 16:02:56,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 16:02:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 445 transitions. [2021-01-06 16:02:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-01-06 16:02:56,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:56,285 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:56,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:56,486 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1778902489, now seen corresponding path program 73 times [2021-01-06 16:02:56,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:56,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685359758] [2021-01-06 16:02:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:59,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685359758] [2021-01-06 16:02:59,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434444118] [2021-01-06 16:02:59,447 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 [2021-01-06 16:02:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:02:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:59,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:59,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-01-06 16:02:59,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26926472] [2021-01-06 16:02:59,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 16:02:59,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:59,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 16:02:59,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:02:59,841 INFO L87 Difference]: Start difference. First operand 372 states and 445 transitions. Second operand 77 states. [2021-01-06 16:03:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:00,387 INFO L93 Difference]: Finished difference Result 385 states and 460 transitions. [2021-01-06 16:03:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 16:03:00,387 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 298 [2021-01-06 16:03:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:00,389 INFO L225 Difference]: With dead ends: 385 [2021-01-06 16:03:00,389 INFO L226 Difference]: Without dead ends: 381 [2021-01-06 16:03:00,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:03:00,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-01-06 16:03:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2021-01-06 16:03:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2021-01-06 16:03:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 451 transitions. [2021-01-06 16:03:00,402 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 451 transitions. Word has length 298 [2021-01-06 16:03:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:00,403 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 451 transitions. [2021-01-06 16:03:00,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 16:03:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 451 transitions. [2021-01-06 16:03:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-01-06 16:03:00,404 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:00,404 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:00,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:00,605 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:00,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1751227449, now seen corresponding path program 74 times [2021-01-06 16:03:00,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:00,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6570189] [2021-01-06 16:03:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:03,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6570189] [2021-01-06 16:03:03,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950953502] [2021-01-06 16:03:03,638 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 [2021-01-06 16:03:03,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:03:03,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:03,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:03:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:04,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:04,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-01-06 16:03:04,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338183898] [2021-01-06 16:03:04,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 16:03:04,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 16:03:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:03:04,069 INFO L87 Difference]: Start difference. First operand 377 states and 451 transitions. Second operand 78 states. [2021-01-06 16:03:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:04,766 INFO L93 Difference]: Finished difference Result 390 states and 466 transitions. [2021-01-06 16:03:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 16:03:04,766 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 302 [2021-01-06 16:03:04,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:04,768 INFO L225 Difference]: With dead ends: 390 [2021-01-06 16:03:04,768 INFO L226 Difference]: Without dead ends: 386 [2021-01-06 16:03:04,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:03:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-01-06 16:03:04,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 382. [2021-01-06 16:03:04,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2021-01-06 16:03:04,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 457 transitions. [2021-01-06 16:03:04,774 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 457 transitions. Word has length 302 [2021-01-06 16:03:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:04,774 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 457 transitions. [2021-01-06 16:03:04,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 16:03:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 457 transitions. [2021-01-06 16:03:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-01-06 16:03:04,776 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:04,776 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:04,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-06 16:03:04,985 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash -121095499, now seen corresponding path program 75 times [2021-01-06 16:03:04,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:04,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113163767] [2021-01-06 16:03:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:08,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113163767] [2021-01-06 16:03:08,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949621974] [2021-01-06 16:03:08,150 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 [2021-01-06 16:03:08,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-01-06 16:03:08,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:08,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:03:08,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:08,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:08,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-01-06 16:03:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938520020] [2021-01-06 16:03:08,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 16:03:08,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:08,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 16:03:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:03:08,657 INFO L87 Difference]: Start difference. First operand 382 states and 457 transitions. Second operand 79 states. [2021-01-06 16:03:09,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:09,478 INFO L93 Difference]: Finished difference Result 395 states and 472 transitions. [2021-01-06 16:03:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 16:03:09,479 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 306 [2021-01-06 16:03:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:09,480 INFO L225 Difference]: With dead ends: 395 [2021-01-06 16:03:09,480 INFO L226 Difference]: Without dead ends: 391 [2021-01-06 16:03:09,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:03:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-01-06 16:03:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 387. [2021-01-06 16:03:09,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2021-01-06 16:03:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 463 transitions. [2021-01-06 16:03:09,485 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 463 transitions. Word has length 306 [2021-01-06 16:03:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:09,485 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 463 transitions. [2021-01-06 16:03:09,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 16:03:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 463 transitions. [2021-01-06 16:03:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-01-06 16:03:09,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:09,487 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:09,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:09,687 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:09,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1915808419, now seen corresponding path program 76 times [2021-01-06 16:03:09,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:09,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144122433] [2021-01-06 16:03:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:12,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144122433] [2021-01-06 16:03:12,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131771413] [2021-01-06 16:03:12,990 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 [2021-01-06 16:03:13,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:13,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:13,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:03:13,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:13,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:13,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-01-06 16:03:13,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252033305] [2021-01-06 16:03:13,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 16:03:13,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 16:03:13,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:03:13,437 INFO L87 Difference]: Start difference. First operand 387 states and 463 transitions. Second operand 80 states. [2021-01-06 16:03:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:14,212 INFO L93 Difference]: Finished difference Result 400 states and 478 transitions. [2021-01-06 16:03:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 16:03:14,213 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 310 [2021-01-06 16:03:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:14,214 INFO L225 Difference]: With dead ends: 400 [2021-01-06 16:03:14,215 INFO L226 Difference]: Without dead ends: 396 [2021-01-06 16:03:14,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:03:14,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-01-06 16:03:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 392. [2021-01-06 16:03:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2021-01-06 16:03:14,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 469 transitions. [2021-01-06 16:03:14,219 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 469 transitions. Word has length 310 [2021-01-06 16:03:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:14,219 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 469 transitions. [2021-01-06 16:03:14,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 16:03:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 469 transitions. [2021-01-06 16:03:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-01-06 16:03:14,221 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:14,221 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:14,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:14,429 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:14,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1497107567, now seen corresponding path program 77 times [2021-01-06 16:03:14,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:14,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836087853] [2021-01-06 16:03:14,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:17,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836087853] [2021-01-06 16:03:17,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585719919] [2021-01-06 16:03:17,772 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 [2021-01-06 16:03:17,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-01-06 16:03:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:03:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:18,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:18,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-01-06 16:03:18,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833863426] [2021-01-06 16:03:18,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 16:03:18,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:18,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 16:03:18,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:03:18,247 INFO L87 Difference]: Start difference. First operand 392 states and 469 transitions. Second operand 81 states. [2021-01-06 16:03:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:18,842 INFO L93 Difference]: Finished difference Result 405 states and 484 transitions. [2021-01-06 16:03:18,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 16:03:18,843 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 314 [2021-01-06 16:03:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:18,844 INFO L225 Difference]: With dead ends: 405 [2021-01-06 16:03:18,844 INFO L226 Difference]: Without dead ends: 401 [2021-01-06 16:03:18,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:03:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-01-06 16:03:18,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 397. [2021-01-06 16:03:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2021-01-06 16:03:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 475 transitions. [2021-01-06 16:03:18,849 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 475 transitions. Word has length 314 [2021-01-06 16:03:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:18,849 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 475 transitions. [2021-01-06 16:03:18,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 16:03:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 475 transitions. [2021-01-06 16:03:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-01-06 16:03:18,850 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:18,850 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:19,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 16:03:19,051 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:19,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:19,052 INFO L82 PathProgramCache]: Analyzing trace with hash -676539009, now seen corresponding path program 78 times [2021-01-06 16:03:19,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:19,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045642840] [2021-01-06 16:03:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:22,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045642840] [2021-01-06 16:03:22,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544409172] [2021-01-06 16:03:22,476 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 [2021-01-06 16:03:22,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-01-06 16:03:22,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:22,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 16:03:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:22,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:22,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-01-06 16:03:22,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262709596] [2021-01-06 16:03:22,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 16:03:22,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:22,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 16:03:22,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:03:22,986 INFO L87 Difference]: Start difference. First operand 397 states and 475 transitions. Second operand 82 states. [2021-01-06 16:03:23,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:23,912 INFO L93 Difference]: Finished difference Result 410 states and 490 transitions. [2021-01-06 16:03:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-01-06 16:03:23,912 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 318 [2021-01-06 16:03:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:23,914 INFO L225 Difference]: With dead ends: 410 [2021-01-06 16:03:23,914 INFO L226 Difference]: Without dead ends: 406 [2021-01-06 16:03:23,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:03:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-01-06 16:03:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 402. [2021-01-06 16:03:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2021-01-06 16:03:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 481 transitions. [2021-01-06 16:03:23,919 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 481 transitions. Word has length 318 [2021-01-06 16:03:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:23,919 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 481 transitions. [2021-01-06 16:03:23,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 16:03:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 481 transitions. [2021-01-06 16:03:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-01-06 16:03:23,920 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:23,921 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:24,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 16:03:24,122 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1000927123, now seen corresponding path program 79 times [2021-01-06 16:03:24,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:24,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215014543] [2021-01-06 16:03:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:24,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:27,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215014543] [2021-01-06 16:03:27,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860355106] [2021-01-06 16:03:27,657 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 [2021-01-06 16:03:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:27,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 16:03:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:28,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:28,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-01-06 16:03:28,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312452284] [2021-01-06 16:03:28,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 16:03:28,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:28,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 16:03:28,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:03:28,094 INFO L87 Difference]: Start difference. First operand 402 states and 481 transitions. Second operand 83 states. [2021-01-06 16:03:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:28,905 INFO L93 Difference]: Finished difference Result 415 states and 496 transitions. [2021-01-06 16:03:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 16:03:28,906 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 322 [2021-01-06 16:03:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:28,908 INFO L225 Difference]: With dead ends: 415 [2021-01-06 16:03:28,908 INFO L226 Difference]: Without dead ends: 411 [2021-01-06 16:03:28,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:03:28,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-01-06 16:03:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 407. [2021-01-06 16:03:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2021-01-06 16:03:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 487 transitions. [2021-01-06 16:03:28,913 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 487 transitions. Word has length 322 [2021-01-06 16:03:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:28,914 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 487 transitions. [2021-01-06 16:03:28,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2021-01-06 16:03:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 487 transitions. [2021-01-06 16:03:28,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-01-06 16:03:28,915 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:28,915 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:29,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:29,116 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:29,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:29,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1972493221, now seen corresponding path program 80 times [2021-01-06 16:03:29,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:29,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328930525] [2021-01-06 16:03:29,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:32,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328930525] [2021-01-06 16:03:32,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509419505] [2021-01-06 16:03:32,690 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 [2021-01-06 16:03:32,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:03:32,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 16:03:32,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:33,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:33,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-01-06 16:03:33,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83305651] [2021-01-06 16:03:33,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-01-06 16:03:33,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:33,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-01-06 16:03:33,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:03:33,142 INFO L87 Difference]: Start difference. First operand 407 states and 487 transitions. Second operand 84 states. [2021-01-06 16:03:33,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:33,851 INFO L93 Difference]: Finished difference Result 420 states and 502 transitions. [2021-01-06 16:03:33,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-01-06 16:03:33,851 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 326 [2021-01-06 16:03:33,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:33,853 INFO L225 Difference]: With dead ends: 420 [2021-01-06 16:03:33,853 INFO L226 Difference]: Without dead ends: 416 [2021-01-06 16:03:33,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-01-06 16:03:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-01-06 16:03:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 412. [2021-01-06 16:03:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2021-01-06 16:03:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 493 transitions. [2021-01-06 16:03:33,858 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 493 transitions. Word has length 326 [2021-01-06 16:03:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:33,859 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 493 transitions. [2021-01-06 16:03:33,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2021-01-06 16:03:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 493 transitions. [2021-01-06 16:03:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-01-06 16:03:33,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:33,861 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:34,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:34,067 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2049076919, now seen corresponding path program 81 times [2021-01-06 16:03:34,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:34,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099592214] [2021-01-06 16:03:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099592214] [2021-01-06 16:03:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546955476] [2021-01-06 16:03:37,781 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 [2021-01-06 16:03:37,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2021-01-06 16:03:37,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 83 conjunts are in the unsatisfiable core [2021-01-06 16:03:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:38,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:38,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-01-06 16:03:38,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867699584] [2021-01-06 16:03:38,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-01-06 16:03:38,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:38,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-01-06 16:03:38,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:03:38,357 INFO L87 Difference]: Start difference. First operand 412 states and 493 transitions. Second operand 85 states. [2021-01-06 16:03:39,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:39,099 INFO L93 Difference]: Finished difference Result 425 states and 508 transitions. [2021-01-06 16:03:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-01-06 16:03:39,100 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 330 [2021-01-06 16:03:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:39,101 INFO L225 Difference]: With dead ends: 425 [2021-01-06 16:03:39,102 INFO L226 Difference]: Without dead ends: 421 [2021-01-06 16:03:39,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 16:03:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-01-06 16:03:39,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2021-01-06 16:03:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2021-01-06 16:03:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 499 transitions. [2021-01-06 16:03:39,106 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 499 transitions. Word has length 330 [2021-01-06 16:03:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:39,107 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 499 transitions. [2021-01-06 16:03:39,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2021-01-06 16:03:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 499 transitions. [2021-01-06 16:03:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-01-06 16:03:39,108 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:39,108 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:39,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:39,309 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:39,310 INFO L82 PathProgramCache]: Analyzing trace with hash 818992951, now seen corresponding path program 82 times [2021-01-06 16:03:39,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:39,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567175673] [2021-01-06 16:03:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:43,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567175673] [2021-01-06 16:03:43,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610392999] [2021-01-06 16:03:43,184 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 [2021-01-06 16:03:43,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 16:03:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:43,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:43,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-01-06 16:03:43,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246835790] [2021-01-06 16:03:43,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-01-06 16:03:43,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:43,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-01-06 16:03:43,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 16:03:43,663 INFO L87 Difference]: Start difference. First operand 417 states and 499 transitions. Second operand 86 states. [2021-01-06 16:03:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:44,877 INFO L93 Difference]: Finished difference Result 430 states and 514 transitions. [2021-01-06 16:03:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-01-06 16:03:44,878 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 334 [2021-01-06 16:03:44,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:44,880 INFO L225 Difference]: With dead ends: 430 [2021-01-06 16:03:44,880 INFO L226 Difference]: Without dead ends: 426 [2021-01-06 16:03:44,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-01-06 16:03:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-01-06 16:03:44,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 422. [2021-01-06 16:03:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2021-01-06 16:03:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 505 transitions. [2021-01-06 16:03:44,886 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 505 transitions. Word has length 334 [2021-01-06 16:03:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:44,886 INFO L481 AbstractCegarLoop]: Abstraction has 422 states and 505 transitions. [2021-01-06 16:03:44,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2021-01-06 16:03:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 505 transitions. [2021-01-06 16:03:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-01-06 16:03:44,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:44,887 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:45,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:45,088 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:45,089 INFO L82 PathProgramCache]: Analyzing trace with hash 62092837, now seen corresponding path program 83 times [2021-01-06 16:03:45,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:45,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181419995] [2021-01-06 16:03:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:49,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:49,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181419995] [2021-01-06 16:03:49,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042226411] [2021-01-06 16:03:49,068 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 [2021-01-06 16:03:49,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2021-01-06 16:03:49,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:49,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 85 conjunts are in the unsatisfiable core [2021-01-06 16:03:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:49,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:49,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-01-06 16:03:49,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714197293] [2021-01-06 16:03:49,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-01-06 16:03:49,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:49,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-01-06 16:03:49,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:03:49,589 INFO L87 Difference]: Start difference. First operand 422 states and 505 transitions. Second operand 87 states. [2021-01-06 16:03:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:50,488 INFO L93 Difference]: Finished difference Result 435 states and 520 transitions. [2021-01-06 16:03:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 16:03:50,489 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 338 [2021-01-06 16:03:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:50,491 INFO L225 Difference]: With dead ends: 435 [2021-01-06 16:03:50,491 INFO L226 Difference]: Without dead ends: 431 [2021-01-06 16:03:50,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-01-06 16:03:50,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-01-06 16:03:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 427. [2021-01-06 16:03:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2021-01-06 16:03:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 511 transitions. [2021-01-06 16:03:50,496 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 511 transitions. Word has length 338 [2021-01-06 16:03:50,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:50,497 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 511 transitions. [2021-01-06 16:03:50,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2021-01-06 16:03:50,497 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 511 transitions. [2021-01-06 16:03:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-01-06 16:03:50,499 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:50,499 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:50,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:50,708 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:50,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1429270035, now seen corresponding path program 84 times [2021-01-06 16:03:50,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:50,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769372060] [2021-01-06 16:03:50,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:54,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769372060] [2021-01-06 16:03:54,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680363354] [2021-01-06 16:03:54,786 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 [2021-01-06 16:03:55,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2021-01-06 16:03:55,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 86 conjunts are in the unsatisfiable core [2021-01-06 16:03:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:55,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:55,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-01-06 16:03:55,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352442294] [2021-01-06 16:03:55,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-01-06 16:03:55,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:55,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-01-06 16:03:55,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:03:55,388 INFO L87 Difference]: Start difference. First operand 427 states and 511 transitions. Second operand 88 states. [2021-01-06 16:03:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:56,711 INFO L93 Difference]: Finished difference Result 440 states and 526 transitions. [2021-01-06 16:03:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-01-06 16:03:56,712 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 342 [2021-01-06 16:03:56,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:56,713 INFO L225 Difference]: With dead ends: 440 [2021-01-06 16:03:56,714 INFO L226 Difference]: Without dead ends: 436 [2021-01-06 16:03:56,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-01-06 16:03:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-01-06 16:03:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 432. [2021-01-06 16:03:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2021-01-06 16:03:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 517 transitions. [2021-01-06 16:03:56,731 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 517 transitions. Word has length 342 [2021-01-06 16:03:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:56,731 INFO L481 AbstractCegarLoop]: Abstraction has 432 states and 517 transitions. [2021-01-06 16:03:56,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2021-01-06 16:03:56,731 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 517 transitions. [2021-01-06 16:03:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-01-06 16:03:56,733 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:56,733 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:56,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-01-06 16:03:56,934 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:56,935 INFO L82 PathProgramCache]: Analyzing trace with hash 976535297, now seen corresponding path program 85 times [2021-01-06 16:03:56,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:56,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638766044] [2021-01-06 16:03:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:01,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638766044] [2021-01-06 16:04:01,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204518593] [2021-01-06 16:04:01,172 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 [2021-01-06 16:04:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:01,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 87 conjunts are in the unsatisfiable core [2021-01-06 16:04:01,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:01,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:01,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2021-01-06 16:04:01,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640533244] [2021-01-06 16:04:01,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-01-06 16:04:01,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:01,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-01-06 16:04:01,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:04:01,683 INFO L87 Difference]: Start difference. First operand 432 states and 517 transitions. Second operand 89 states. [2021-01-06 16:04:02,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:02,939 INFO L93 Difference]: Finished difference Result 445 states and 532 transitions. [2021-01-06 16:04:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-01-06 16:04:02,940 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 346 [2021-01-06 16:04:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:02,942 INFO L225 Difference]: With dead ends: 445 [2021-01-06 16:04:02,942 INFO L226 Difference]: Without dead ends: 441 [2021-01-06 16:04:02,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-01-06 16:04:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-01-06 16:04:02,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 437. [2021-01-06 16:04:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2021-01-06 16:04:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 523 transitions. [2021-01-06 16:04:02,948 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 523 transitions. Word has length 346 [2021-01-06 16:04:02,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:02,948 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 523 transitions. [2021-01-06 16:04:02,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2021-01-06 16:04:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 523 transitions. [2021-01-06 16:04:02,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-01-06 16:04:02,950 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:02,950 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:03,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:03,151 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1709861103, now seen corresponding path program 86 times [2021-01-06 16:04:03,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:03,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582397542] [2021-01-06 16:04:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:07,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582397542] [2021-01-06 16:04:07,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661013727] [2021-01-06 16:04:07,486 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 [2021-01-06 16:04:07,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:04:07,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:07,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 16:04:07,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:07,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:07,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-01-06 16:04:07,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128030016] [2021-01-06 16:04:07,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-01-06 16:04:07,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:07,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-01-06 16:04:07,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:04:07,991 INFO L87 Difference]: Start difference. First operand 437 states and 523 transitions. Second operand 90 states. [2021-01-06 16:04:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:09,377 INFO L93 Difference]: Finished difference Result 450 states and 538 transitions. [2021-01-06 16:04:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-01-06 16:04:09,378 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 350 [2021-01-06 16:04:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:09,380 INFO L225 Difference]: With dead ends: 450 [2021-01-06 16:04:09,380 INFO L226 Difference]: Without dead ends: 446 [2021-01-06 16:04:09,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-01-06 16:04:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-01-06 16:04:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 442. [2021-01-06 16:04:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2021-01-06 16:04:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 529 transitions. [2021-01-06 16:04:09,385 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 529 transitions. Word has length 350 [2021-01-06 16:04:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:09,385 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 529 transitions. [2021-01-06 16:04:09,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2021-01-06 16:04:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 529 transitions. [2021-01-06 16:04:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-01-06 16:04:09,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:09,387 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:09,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-01-06 16:04:09,588 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:09,588 INFO L82 PathProgramCache]: Analyzing trace with hash 163408861, now seen corresponding path program 87 times [2021-01-06 16:04:09,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:09,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497259771] [2021-01-06 16:04:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497259771] [2021-01-06 16:04:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569155917] [2021-01-06 16:04:14,002 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 [2021-01-06 16:04:14,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2021-01-06 16:04:14,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:14,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 89 conjunts are in the unsatisfiable core [2021-01-06 16:04:14,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:14,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:14,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-01-06 16:04:14,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796087879] [2021-01-06 16:04:14,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-01-06 16:04:14,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:14,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-01-06 16:04:14,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:04:14,624 INFO L87 Difference]: Start difference. First operand 442 states and 529 transitions. Second operand 91 states. [2021-01-06 16:04:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:16,003 INFO L93 Difference]: Finished difference Result 455 states and 544 transitions. [2021-01-06 16:04:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-01-06 16:04:16,003 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 354 [2021-01-06 16:04:16,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:16,005 INFO L225 Difference]: With dead ends: 455 [2021-01-06 16:04:16,005 INFO L226 Difference]: Without dead ends: 451 [2021-01-06 16:04:16,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 16:04:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-01-06 16:04:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2021-01-06 16:04:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2021-01-06 16:04:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 535 transitions. [2021-01-06 16:04:16,010 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 535 transitions. Word has length 354 [2021-01-06 16:04:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:16,011 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 535 transitions. [2021-01-06 16:04:16,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2021-01-06 16:04:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 535 transitions. [2021-01-06 16:04:16,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-01-06 16:04:16,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:16,012 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:16,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-06 16:04:16,213 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:16,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1252440117, now seen corresponding path program 88 times [2021-01-06 16:04:16,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:16,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67896225] [2021-01-06 16:04:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:20,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67896225] [2021-01-06 16:04:20,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014621852] [2021-01-06 16:04:20,734 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 [2021-01-06 16:04:20,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:04:20,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:20,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 90 conjunts are in the unsatisfiable core [2021-01-06 16:04:20,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 0 proven. 15400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:21,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:21,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2021-01-06 16:04:21,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540140662] [2021-01-06 16:04:21,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 16:04:21,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:21,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 16:04:21,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:04:21,305 INFO L87 Difference]: Start difference. First operand 447 states and 535 transitions. Second operand 92 states. [2021-01-06 16:04:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:22,198 INFO L93 Difference]: Finished difference Result 460 states and 550 transitions. [2021-01-06 16:04:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-01-06 16:04:22,199 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 358 [2021-01-06 16:04:22,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:22,201 INFO L225 Difference]: With dead ends: 460 [2021-01-06 16:04:22,201 INFO L226 Difference]: Without dead ends: 456 [2021-01-06 16:04:22,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 16:04:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-01-06 16:04:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 452. [2021-01-06 16:04:22,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 452 states. [2021-01-06 16:04:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 541 transitions. [2021-01-06 16:04:22,206 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 541 transitions. Word has length 358 [2021-01-06 16:04:22,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:22,206 INFO L481 AbstractCegarLoop]: Abstraction has 452 states and 541 transitions. [2021-01-06 16:04:22,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 16:04:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 541 transitions. [2021-01-06 16:04:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-01-06 16:04:22,210 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:22,210 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:22,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:22,411 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:22,412 INFO L82 PathProgramCache]: Analyzing trace with hash 917077177, now seen corresponding path program 89 times [2021-01-06 16:04:22,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:22,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313298956] [2021-01-06 16:04:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:27,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313298956] [2021-01-06 16:04:27,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035983972] [2021-01-06 16:04:27,061 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 [2021-01-06 16:04:27,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2021-01-06 16:04:27,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 91 conjunts are in the unsatisfiable core [2021-01-06 16:04:27,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15753 backedges. 0 proven. 15753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:27,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:27,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-01-06 16:04:27,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261012569] [2021-01-06 16:04:27,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-01-06 16:04:27,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-01-06 16:04:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:04:27,668 INFO L87 Difference]: Start difference. First operand 452 states and 541 transitions. Second operand 93 states. [2021-01-06 16:04:29,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:29,149 INFO L93 Difference]: Finished difference Result 465 states and 556 transitions. [2021-01-06 16:04:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-01-06 16:04:29,150 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 362 [2021-01-06 16:04:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:29,152 INFO L225 Difference]: With dead ends: 465 [2021-01-06 16:04:29,152 INFO L226 Difference]: Without dead ends: 461 [2021-01-06 16:04:29,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-01-06 16:04:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-01-06 16:04:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 457. [2021-01-06 16:04:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2021-01-06 16:04:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 547 transitions. [2021-01-06 16:04:29,157 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 547 transitions. Word has length 362 [2021-01-06 16:04:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:29,158 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 547 transitions. [2021-01-06 16:04:29,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2021-01-06 16:04:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 547 transitions. [2021-01-06 16:04:29,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-01-06 16:04:29,159 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:29,159 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:29,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:29,360 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:29,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2044299943, now seen corresponding path program 90 times [2021-01-06 16:04:29,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:29,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273963655] [2021-01-06 16:04:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:34,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273963655] [2021-01-06 16:04:34,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635025824] [2021-01-06 16:04:34,205 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 [2021-01-06 16:04:34,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2021-01-06 16:04:34,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 16:04:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16110 backedges. 0 proven. 16110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:34,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:34,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-01-06 16:04:34,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690383639] [2021-01-06 16:04:34,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 16:04:34,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:34,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 16:04:34,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:04:34,864 INFO L87 Difference]: Start difference. First operand 457 states and 547 transitions. Second operand 94 states. [2021-01-06 16:04:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:36,477 INFO L93 Difference]: Finished difference Result 470 states and 562 transitions. [2021-01-06 16:04:36,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-01-06 16:04:36,478 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 366 [2021-01-06 16:04:36,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:36,479 INFO L225 Difference]: With dead ends: 470 [2021-01-06 16:04:36,480 INFO L226 Difference]: Without dead ends: 466 [2021-01-06 16:04:36,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 16:04:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-01-06 16:04:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 462. [2021-01-06 16:04:36,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2021-01-06 16:04:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 553 transitions. [2021-01-06 16:04:36,485 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 553 transitions. Word has length 366 [2021-01-06 16:04:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:36,485 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 553 transitions. [2021-01-06 16:04:36,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 16:04:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 553 transitions. [2021-01-06 16:04:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-01-06 16:04:36,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:36,487 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:36,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:36,687 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:36,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1767174549, now seen corresponding path program 91 times [2021-01-06 16:04:36,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:36,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144189797] [2021-01-06 16:04:36,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:41,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144189797] [2021-01-06 16:04:41,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88751891] [2021-01-06 16:04:41,733 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 16:04:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16471 backedges. 0 proven. 16471 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:42,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:42,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2021-01-06 16:04:42,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524609483] [2021-01-06 16:04:42,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-01-06 16:04:42,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:42,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-01-06 16:04:42,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:04:42,290 INFO L87 Difference]: Start difference. First operand 462 states and 553 transitions. Second operand 95 states. [2021-01-06 16:04:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:43,993 INFO L93 Difference]: Finished difference Result 475 states and 568 transitions. [2021-01-06 16:04:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-01-06 16:04:43,994 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 370 [2021-01-06 16:04:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:43,996 INFO L225 Difference]: With dead ends: 475 [2021-01-06 16:04:43,996 INFO L226 Difference]: Without dead ends: 471 [2021-01-06 16:04:43,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-01-06 16:04:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-01-06 16:04:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2021-01-06 16:04:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2021-01-06 16:04:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 559 transitions. [2021-01-06 16:04:44,002 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 559 transitions. Word has length 370 [2021-01-06 16:04:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:44,002 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 559 transitions. [2021-01-06 16:04:44,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2021-01-06 16:04:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 559 transitions. [2021-01-06 16:04:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-01-06 16:04:44,003 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:44,004 INFO L422 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:44,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:44,204 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:44,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:44,205 INFO L82 PathProgramCache]: Analyzing trace with hash -842583677, now seen corresponding path program 92 times [2021-01-06 16:04:44,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:44,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758692511] [2021-01-06 16:04:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat