/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/recursive-simple/id_o1000.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:20:46,047 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:20:46,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:20:46,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:20:46,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:20:46,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:20:46,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:20:46,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:20:46,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:20:46,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:20:46,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:20:46,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:20:46,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:20:46,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:20:46,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:20:46,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:20:46,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:20:46,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:20:46,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:20:46,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:20:46,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:20:46,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:20:46,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:20:46,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:20:46,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:20:46,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:20:46,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:20:46,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:20:46,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:20:46,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:20:46,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:20:46,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:20:46,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:20:46,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:20:46,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:20:46,157 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:20:46,158 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 19:20:46,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:20:46,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:20:46,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:20:46,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:20:46,203 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:20:46,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:20:46,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:20:46,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:20:46,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:20:46,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:20:46,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:20:46,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:20:46,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:20:46,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:20:46,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:20:46,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:20:46,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:20:46,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:20:46,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:20:46,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:20:46,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:20:46,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:20:46,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:20:46,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:20:46,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:20:46,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:20:46,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:20:46,645 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:20:46,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:20:46,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:20:46,650 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:20:46,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o1000.c [2021-01-06 19:20:46,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/856810927/3710990e48b84ab9b374f08ebf20b1ad/FLAG8fa460d83 [2021-01-06 19:20:47,410 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:20:47,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o1000.c [2021-01-06 19:20:47,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/856810927/3710990e48b84ab9b374f08ebf20b1ad/FLAG8fa460d83 [2021-01-06 19:20:47,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/856810927/3710990e48b84ab9b374f08ebf20b1ad [2021-01-06 19:20:47,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:20:47,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:20:47,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:47,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:20:47,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:20:47,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:47" (1/1) ... [2021-01-06 19:20:47,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652c65d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:47, skipping insertion in model container [2021-01-06 19:20:47,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:47" (1/1) ... [2021-01-06 19:20:47,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:20:47,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:20:47,968 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/recursive-simple/id_o1000.c[520,533] [2021-01-06 19:20:47,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:47,989 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:20:48,006 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/recursive-simple/id_o1000.c[520,533] [2021-01-06 19:20:48,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:48,023 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:20:48,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48 WrapperNode [2021-01-06 19:20:48,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:48,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:48,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:20:48,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:20:48,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:48,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:20:48,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:20:48,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:20:48,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (1/1) ... [2021-01-06 19:20:48,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:20:48,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:20:48,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:20:48,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:20:48,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (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 19:20:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:20:48,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:20:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:20:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-01-06 19:20:48,208 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-01-06 19:20:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:20:48,445 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:20:48,445 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:20:48,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:48 BoogieIcfgContainer [2021-01-06 19:20:48,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:20:48,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:20:48,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:20:48,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:20:48,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:20:47" (1/3) ... [2021-01-06 19:20:48,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7f861d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:48, skipping insertion in model container [2021-01-06 19:20:48,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:48" (2/3) ... [2021-01-06 19:20:48,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7f861d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:48, skipping insertion in model container [2021-01-06 19:20:48,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:48" (3/3) ... [2021-01-06 19:20:48,458 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2021-01-06 19:20:48,467 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:20:48,473 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:20:48,501 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:20:48,558 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:20:48,558 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:20:48,558 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:20:48,558 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:20:48,559 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:20:48,559 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:20:48,559 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:20:48,559 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:20:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 19:20:48,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:20:48,586 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:48,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:48,587 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-01-06 19:20:48,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:48,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362126427] [2021-01-06 19:20:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,875 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 19:20:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362126427] [2021-01-06 19:20:48,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:48,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:48,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550964488] [2021-01-06 19:20:48,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:48,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:48,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:48,901 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2021-01-06 19:20:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:48,956 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 19:20:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:48,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:20:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:48,969 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:48,969 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 19:20:48,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 19:20:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 19:20:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 19:20:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 19:20:49,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 19:20:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:49,022 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 19:20:49,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 19:20:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 19:20:49,024 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:49,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:49,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:20:49,025 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-01-06 19:20:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:49,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306079117] [2021-01-06 19:20:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:49,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:49,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306079117] [2021-01-06 19:20:49,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252925607] [2021-01-06 19:20:49,242 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 19:20:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 19:20:49,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:49,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:49,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 19:20:49,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877643880] [2021-01-06 19:20:49,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:20:49,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:20:49,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:20:49,477 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2021-01-06 19:20:49,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:49,530 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 19:20:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:20:49,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 19:20:49,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:49,534 INFO L225 Difference]: With dead ends: 22 [2021-01-06 19:20:49,534 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 19:20:49,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:20:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 19:20:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 19:20:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:20:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 19:20:49,542 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-01-06 19:20:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:49,543 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 19:20:49,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:20:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 19:20:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 19:20:49,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:49,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:49,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:20:49,761 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:49,764 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-01-06 19:20:49,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:49,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884447233] [2021-01-06 19:20:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:20:50,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884447233] [2021-01-06 19:20:50,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173238759] [2021-01-06 19:20:50,025 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 19:20:50,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:50,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:50,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:20:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:20:50,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:50,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 19:20:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444401545] [2021-01-06 19:20:50,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 19:20:50,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 19:20:50,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:50,172 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2021-01-06 19:20:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:50,207 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-01-06 19:20:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:20:50,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2021-01-06 19:20:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:50,209 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:20:50,209 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 19:20:50,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:50,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 19:20:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 19:20:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 19:20:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 19:20:50,216 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-01-06 19:20:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:50,216 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 19:20:50,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 19:20:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 19:20:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 19:20:50,218 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:50,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:50,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:50,421 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-01-06 19:20:50,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:50,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935608307] [2021-01-06 19:20:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:20:50,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935608307] [2021-01-06 19:20:50,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695377514] [2021-01-06 19:20:50,726 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 19:20:50,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:20:50,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 19:20:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:20:50,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:50,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 19:20:50,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162704314] [2021-01-06 19:20:50,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:20:50,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:20:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:20:50,885 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 12 states. [2021-01-06 19:20:50,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:50,931 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 19:20:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:20:50,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2021-01-06 19:20:50,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:50,933 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:50,933 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 19:20:50,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:20:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 19:20:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 19:20:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 19:20:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 19:20:50,940 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-01-06 19:20:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:50,940 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 19:20:50,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:20:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 19:20:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 19:20:50,942 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:50,942 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:51,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:51,155 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-01-06 19:20:51,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:51,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48260901] [2021-01-06 19:20:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:20:51,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48260901] [2021-01-06 19:20:51,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258609268] [2021-01-06 19:20:51,447 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 19:20:51,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:51,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:51,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:20:51,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:20:51,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:51,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 19:20:51,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242415283] [2021-01-06 19:20:51,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 19:20:51,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:51,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 19:20:51,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:20:51,596 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 14 states. [2021-01-06 19:20:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:51,663 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-01-06 19:20:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 19:20:51,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2021-01-06 19:20:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:51,665 INFO L225 Difference]: With dead ends: 31 [2021-01-06 19:20:51,665 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:20:51,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:20:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:20:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:20:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:20:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 19:20:51,672 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-01-06 19:20:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:51,673 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 19:20:51,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 19:20:51,673 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 19:20:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:20:51,674 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:51,674 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:51,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:51,889 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-01-06 19:20:51,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:51,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084932163] [2021-01-06 19:20:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:20:52,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084932163] [2021-01-06 19:20:52,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814739210] [2021-01-06 19:20:52,210 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 19:20:52,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 19:20:52,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:52,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 19:20:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:20:52,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:52,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 19:20:52,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744652625] [2021-01-06 19:20:52,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 19:20:52,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:52,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 19:20:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:20:52,515 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 16 states. [2021-01-06 19:20:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:52,603 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 19:20:52,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:20:52,603 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2021-01-06 19:20:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:52,605 INFO L225 Difference]: With dead ends: 34 [2021-01-06 19:20:52,605 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 19:20:52,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:20:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 19:20:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 19:20:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 19:20:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 19:20:52,612 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-01-06 19:20:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:52,612 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 19:20:52,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 19:20:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 19:20:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 19:20:52,614 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:52,614 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:52,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 19:20:52,828 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:52,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:52,829 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-01-06 19:20:52,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:52,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128659123] [2021-01-06 19:20:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:20:53,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128659123] [2021-01-06 19:20:53,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676088786] [2021-01-06 19:20:53,147 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 19:20:53,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 19:20:53,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 19:20:53,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:20:53,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:53,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 19:20:53,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719819232] [2021-01-06 19:20:53,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 19:20:53,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:53,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 19:20:53,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:20:53,350 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 18 states. [2021-01-06 19:20:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:53,454 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-01-06 19:20:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 19:20:53,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2021-01-06 19:20:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:53,456 INFO L225 Difference]: With dead ends: 37 [2021-01-06 19:20:53,457 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 19:20:53,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:20:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 19:20:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 19:20:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 19:20:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 19:20:53,464 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-01-06 19:20:53,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:53,464 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 19:20:53,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 19:20:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 19:20:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 19:20:53,466 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:53,466 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:53,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:53,680 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-01-06 19:20:53,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:53,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157925800] [2021-01-06 19:20:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:20:54,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157925800] [2021-01-06 19:20:54,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316588617] [2021-01-06 19:20:54,094 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 19:20:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 19:20:54,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:20:54,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:54,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 19:20:54,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291475051] [2021-01-06 19:20:54,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 19:20:54,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:54,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 19:20:54,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:20:54,293 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 20 states. [2021-01-06 19:20:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:54,421 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-01-06 19:20:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 19:20:54,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2021-01-06 19:20:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:54,423 INFO L225 Difference]: With dead ends: 40 [2021-01-06 19:20:54,423 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 19:20:54,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:20:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 19:20:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 19:20:54,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 19:20:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 19:20:54,430 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-01-06 19:20:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:54,431 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 19:20:54,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 19:20:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 19:20:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 19:20:54,432 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:54,432 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:54,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:54,646 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:54,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:54,647 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-01-06 19:20:54,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:54,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561981877] [2021-01-06 19:20:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:20:55,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561981877] [2021-01-06 19:20:55,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96427040] [2021-01-06 19:20:55,148 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 19:20:55,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 19:20:55,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:20:55,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:55,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 19:20:55,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616911465] [2021-01-06 19:20:55,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 19:20:55,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 19:20:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:20:55,325 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 22 states. [2021-01-06 19:20:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:55,511 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-01-06 19:20:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 19:20:55,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2021-01-06 19:20:55,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:55,515 INFO L225 Difference]: With dead ends: 43 [2021-01-06 19:20:55,515 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 19:20:55,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:20:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 19:20:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 19:20:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 19:20:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 19:20:55,530 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-01-06 19:20:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:55,530 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 19:20:55,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 19:20:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 19:20:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:20:55,532 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:55,532 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:55,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 19:20:55,736 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-01-06 19:20:55,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:55,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573302585] [2021-01-06 19:20:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:20:56,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573302585] [2021-01-06 19:20:56,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361369051] [2021-01-06 19:20:56,367 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 19:20:56,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 19:20:56,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:56,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 19:20:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:20:56,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:56,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 19:20:56,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751790785] [2021-01-06 19:20:56,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 19:20:56,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:56,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 19:20:56,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:56,663 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 24 states. [2021-01-06 19:20:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:56,833 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 19:20:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 19:20:56,834 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2021-01-06 19:20:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:56,835 INFO L225 Difference]: With dead ends: 46 [2021-01-06 19:20:56,835 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 19:20:56,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 19:20:56,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 19:20:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 19:20:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 19:20:56,842 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-01-06 19:20:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:56,842 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 19:20:56,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 19:20:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 19:20:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 19:20:56,844 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:56,844 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:57,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:57,051 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-01-06 19:20:57,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:57,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383570575] [2021-01-06 19:20:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 19:20:57,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383570575] [2021-01-06 19:20:57,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720459149] [2021-01-06 19:20:57,691 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 19:20:57,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:57,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:57,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 19:20:57,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 19:20:57,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:57,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 19:20:57,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928231957] [2021-01-06 19:20:57,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 19:20:57,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 19:20:57,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:20:57,942 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 26 states. [2021-01-06 19:20:58,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:58,176 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-01-06 19:20:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 19:20:58,176 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 70 [2021-01-06 19:20:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:58,178 INFO L225 Difference]: With dead ends: 49 [2021-01-06 19:20:58,178 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 19:20:58,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:20:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 19:20:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 19:20:58,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 19:20:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 19:20:58,185 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-01-06 19:20:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:58,185 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 19:20:58,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 19:20:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 19:20:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 19:20:58,186 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:58,187 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:58,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:58,401 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:58,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-01-06 19:20:58,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:58,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455925228] [2021-01-06 19:20:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 19:20:59,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455925228] [2021-01-06 19:20:59,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34677608] [2021-01-06 19:20:59,155 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 19:20:59,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 19:20:59,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:59,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 19:20:59,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 19:20:59,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:59,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 19:20:59,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808487419] [2021-01-06 19:20:59,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 19:20:59,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 19:20:59,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:20:59,610 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 28 states. [2021-01-06 19:20:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:59,894 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 19:20:59,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 19:20:59,894 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2021-01-06 19:20:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:59,896 INFO L225 Difference]: With dead ends: 52 [2021-01-06 19:20:59,896 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 19:20:59,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:20:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 19:20:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 19:20:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 19:20:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 19:20:59,903 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-01-06 19:20:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:59,903 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 19:20:59,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 19:20:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 19:20:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 19:20:59,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:59,905 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:00,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 19:21:00,116 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-01-06 19:21:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:00,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908320019] [2021-01-06 19:21:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 19:21:00,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908320019] [2021-01-06 19:21:00,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031203800] [2021-01-06 19:21:00,989 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 19:21:01,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 19:21:01,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 19:21:01,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 19:21:01,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:01,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 19:21:01,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912992923] [2021-01-06 19:21:01,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 19:21:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 19:21:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-01-06 19:21:01,533 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 30 states. [2021-01-06 19:21:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:01,838 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-01-06 19:21:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 19:21:01,839 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 82 [2021-01-06 19:21:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:01,840 INFO L225 Difference]: With dead ends: 55 [2021-01-06 19:21:01,841 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 19:21:01,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-01-06 19:21:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 19:21:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 19:21:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 19:21:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-01-06 19:21:01,849 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-01-06 19:21:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:01,849 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-01-06 19:21:01,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 19:21:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-01-06 19:21:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 19:21:01,850 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:01,851 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:02,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 19:21:02,057 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:02,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-01-06 19:21:02,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:02,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129025940] [2021-01-06 19:21:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-01-06 19:21:03,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129025940] [2021-01-06 19:21:03,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181794118] [2021-01-06 19:21:03,103 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 19:21:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 19:21:03,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-01-06 19:21:03,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:03,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 19:21:03,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16882035] [2021-01-06 19:21:03,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 19:21:03,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 19:21:03,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-01-06 19:21:03,323 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 32 states. [2021-01-06 19:21:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:03,682 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-01-06 19:21:03,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 19:21:03,683 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 88 [2021-01-06 19:21:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:03,684 INFO L225 Difference]: With dead ends: 58 [2021-01-06 19:21:03,684 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 19:21:03,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-01-06 19:21:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 19:21:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 19:21:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 19:21:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-01-06 19:21:03,691 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-01-06 19:21:03,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:03,692 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-01-06 19:21:03,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 19:21:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-01-06 19:21:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 19:21:03,693 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:03,693 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:03,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:21:03,908 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:03,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-01-06 19:21:03,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:03,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555055870] [2021-01-06 19:21:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 19:21:04,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555055870] [2021-01-06 19:21:04,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417870900] [2021-01-06 19:21:04,922 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 19:21:04,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:04,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:04,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 19:21:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 19:21:05,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:05,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 19:21:05,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935543536] [2021-01-06 19:21:05,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 19:21:05,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:05,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 19:21:05,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:21:05,155 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 34 states. [2021-01-06 19:21:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:05,546 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-01-06 19:21:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 19:21:05,547 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 94 [2021-01-06 19:21:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:05,548 INFO L225 Difference]: With dead ends: 61 [2021-01-06 19:21:05,548 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 19:21:05,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:21:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 19:21:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 19:21:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 19:21:05,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 19:21:05,555 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-01-06 19:21:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:05,555 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 19:21:05,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 19:21:05,556 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 19:21:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 19:21:05,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:05,557 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:05,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:05,768 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-01-06 19:21:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:05,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641997004] [2021-01-06 19:21:05,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-01-06 19:21:06,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641997004] [2021-01-06 19:21:06,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82850231] [2021-01-06 19:21:06,861 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 19:21:07,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 19:21:07,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 19:21:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-01-06 19:21:07,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:07,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 19:21:07,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419884949] [2021-01-06 19:21:07,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 19:21:07,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 19:21:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 19:21:07,675 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 36 states. [2021-01-06 19:21:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:08,153 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-01-06 19:21:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 19:21:08,154 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2021-01-06 19:21:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:08,155 INFO L225 Difference]: With dead ends: 64 [2021-01-06 19:21:08,155 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 19:21:08,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 19:21:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 19:21:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 19:21:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 19:21:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-01-06 19:21:08,162 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-01-06 19:21:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:08,162 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-01-06 19:21:08,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 19:21:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-01-06 19:21:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 19:21:08,163 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:08,164 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:08,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:21:08,371 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-01-06 19:21:08,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:08,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568312438] [2021-01-06 19:21:08,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:08,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 19:21:09,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568312438] [2021-01-06 19:21:09,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130296538] [2021-01-06 19:21:09,592 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 19:21:09,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:09,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 19:21:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 19:21:09,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:09,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 19:21:09,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329973835] [2021-01-06 19:21:09,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 19:21:09,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:09,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 19:21:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:21:09,837 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 38 states. [2021-01-06 19:21:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:10,371 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-01-06 19:21:10,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 19:21:10,372 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 106 [2021-01-06 19:21:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:10,373 INFO L225 Difference]: With dead ends: 67 [2021-01-06 19:21:10,373 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 19:21:10,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:21:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 19:21:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 19:21:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 19:21:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-01-06 19:21:10,382 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-01-06 19:21:10,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:10,383 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-01-06 19:21:10,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 19:21:10,383 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-01-06 19:21:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 19:21:10,384 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:10,384 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:10,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 19:21:10,599 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:10,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-01-06 19:21:10,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:10,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592410081] [2021-01-06 19:21:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:11,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 19:21:12,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592410081] [2021-01-06 19:21:12,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582973624] [2021-01-06 19:21:12,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:21:16,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 19:21:16,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:16,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 19:21:16,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 19:21:16,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:16,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 19:21:16,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036075757] [2021-01-06 19:21:16,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 19:21:16,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:16,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 19:21:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 19:21:16,708 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 40 states. [2021-01-06 19:21:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:17,313 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-01-06 19:21:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 19:21:17,319 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 112 [2021-01-06 19:21:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:17,324 INFO L225 Difference]: With dead ends: 70 [2021-01-06 19:21:17,324 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 19:21:17,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 19:21:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 19:21:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 19:21:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 19:21:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-01-06 19:21:17,330 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-01-06 19:21:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:17,331 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-01-06 19:21:17,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 19:21:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-01-06 19:21:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 19:21:17,332 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:17,332 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:17,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 19:21:17,536 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-01-06 19:21:17,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:17,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711300488] [2021-01-06 19:21:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 19:21:19,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711300488] [2021-01-06 19:21:19,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273303074] [2021-01-06 19:21:19,181 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 19:21:20,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 19:21:20,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:20,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 19:21:20,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 19:21:20,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:20,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 19:21:20,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058296764] [2021-01-06 19:21:20,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 19:21:20,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:20,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 19:21:20,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 19:21:20,456 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 42 states. [2021-01-06 19:21:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:21,068 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-06 19:21:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 19:21:21,069 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 118 [2021-01-06 19:21:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:21,070 INFO L225 Difference]: With dead ends: 73 [2021-01-06 19:21:21,070 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 19:21:21,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 19:21:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 19:21:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-06 19:21:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 19:21:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-06 19:21:21,076 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-01-06 19:21:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:21,076 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-06 19:21:21,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 19:21:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-06 19:21:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 19:21:21,077 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:21,077 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:21,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:21,281 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:21,282 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-01-06 19:21:21,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:21,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721715920] [2021-01-06 19:21:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-01-06 19:21:22,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721715920] [2021-01-06 19:21:22,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842423714] [2021-01-06 19:21:22,990 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 19:21:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 19:21:23,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-01-06 19:21:23,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:23,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 19:21:23,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079681278] [2021-01-06 19:21:23,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 19:21:23,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 19:21:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 19:21:23,275 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 44 states. [2021-01-06 19:21:24,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:24,049 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-01-06 19:21:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 19:21:24,050 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 124 [2021-01-06 19:21:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:24,051 INFO L225 Difference]: With dead ends: 76 [2021-01-06 19:21:24,051 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 19:21:24,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 19:21:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 19:21:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 19:21:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 19:21:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-06 19:21:24,058 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-01-06 19:21:24,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:24,058 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-06 19:21:24,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 19:21:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-06 19:21:24,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 19:21:24,059 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:24,059 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:24,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:24,273 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-01-06 19:21:24,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:24,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296613528] [2021-01-06 19:21:24,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:24,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:25,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-01-06 19:21:26,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296613528] [2021-01-06 19:21:26,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550967610] [2021-01-06 19:21:26,231 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 19:21:26,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:26,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 19:21:26,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:26,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-01-06 19:21:26,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:26,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 19:21:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27345679] [2021-01-06 19:21:26,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 19:21:26,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:26,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 19:21:26,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 19:21:26,554 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 46 states. [2021-01-06 19:21:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:27,363 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-01-06 19:21:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 19:21:27,364 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 130 [2021-01-06 19:21:27,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:27,366 INFO L225 Difference]: With dead ends: 79 [2021-01-06 19:21:27,366 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 19:21:27,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 19:21:27,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 19:21:27,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-01-06 19:21:27,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 19:21:27,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-01-06 19:21:27,372 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-01-06 19:21:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:27,373 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-01-06 19:21:27,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 19:21:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-01-06 19:21:27,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 19:21:27,374 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:27,374 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:27,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 19:21:27,588 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-01-06 19:21:27,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:27,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393218178] [2021-01-06 19:21:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:27,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-01-06 19:21:29,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393218178] [2021-01-06 19:21:29,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425033546] [2021-01-06 19:21:29,639 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 19:21:32,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 19:21:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:32,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 19:21:32,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-01-06 19:21:32,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:32,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 19:21:32,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901166568] [2021-01-06 19:21:32,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 19:21:32,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:32,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 19:21:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:21:32,638 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 48 states. [2021-01-06 19:21:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:33,551 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-01-06 19:21:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 19:21:33,554 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 136 [2021-01-06 19:21:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:33,555 INFO L225 Difference]: With dead ends: 82 [2021-01-06 19:21:33,555 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 19:21:33,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:21:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 19:21:33,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-01-06 19:21:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 19:21:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-01-06 19:21:33,571 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-01-06 19:21:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:33,571 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-01-06 19:21:33,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 19:21:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-01-06 19:21:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 19:21:33,572 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:33,573 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:33,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 19:21:33,778 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:33,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:33,778 INFO L82 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-01-06 19:21:33,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:33,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141920882] [2021-01-06 19:21:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:33,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:33,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-01-06 19:21:36,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141920882] [2021-01-06 19:21:36,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167906979] [2021-01-06 19:21:36,225 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 19:21:36,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:36,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:36,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 96 conjunts are in the unsatisfiable core [2021-01-06 19:21:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-01-06 19:21:36,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:36,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 19:21:36,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333767820] [2021-01-06 19:21:36,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 19:21:36,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:36,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 19:21:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 19:21:36,560 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 50 states. [2021-01-06 19:21:37,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:37,487 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-01-06 19:21:37,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 19:21:37,487 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 142 [2021-01-06 19:21:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:37,489 INFO L225 Difference]: With dead ends: 85 [2021-01-06 19:21:37,489 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 19:21:37,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 19:21:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 19:21:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 19:21:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 19:21:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-01-06 19:21:37,496 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-01-06 19:21:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:37,496 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-01-06 19:21:37,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 19:21:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-01-06 19:21:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 19:21:37,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:37,498 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:37,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:37,713 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:37,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-01-06 19:21:37,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:37,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035425025] [2021-01-06 19:21:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:37,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:37,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:37,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:38,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 19:21:40,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035425025] [2021-01-06 19:21:40,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032400050] [2021-01-06 19:21:40,064 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 19:21:45,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 19:21:45,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:45,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 100 conjunts are in the unsatisfiable core [2021-01-06 19:21:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 19:21:45,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:45,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 19:21:45,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855452434] [2021-01-06 19:21:45,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 19:21:45,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 19:21:45,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 19:21:45,953 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 52 states. [2021-01-06 19:21:47,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:47,013 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-01-06 19:21:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 19:21:47,013 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 148 [2021-01-06 19:21:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:47,014 INFO L225 Difference]: With dead ends: 88 [2021-01-06 19:21:47,015 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 19:21:47,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 19:21:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 19:21:47,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-01-06 19:21:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 19:21:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-01-06 19:21:47,020 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-01-06 19:21:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:47,021 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-01-06 19:21:47,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 19:21:47,021 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-01-06 19:21:47,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 19:21:47,022 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:47,022 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:47,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 19:21:47,227 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:47,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-01-06 19:21:47,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:47,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933867484] [2021-01-06 19:21:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:49,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:49,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:49,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:49,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:49,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-01-06 19:21:49,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933867484] [2021-01-06 19:21:49,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010164649] [2021-01-06 19:21:49,868 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 19:21:52,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 19:21:52,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 104 conjunts are in the unsatisfiable core [2021-01-06 19:21:52,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-01-06 19:21:52,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:52,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 19:21:52,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708597895] [2021-01-06 19:21:52,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 19:21:52,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:52,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 19:21:52,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 19:21:52,368 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 54 states. [2021-01-06 19:21:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:53,588 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-01-06 19:21:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 19:21:53,588 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 154 [2021-01-06 19:21:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:53,590 INFO L225 Difference]: With dead ends: 91 [2021-01-06 19:21:53,590 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 19:21:53,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 19:21:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 19:21:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 19:21:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 19:21:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-01-06 19:21:53,596 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-01-06 19:21:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:53,596 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-01-06 19:21:53,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 19:21:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-01-06 19:21:53,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 19:21:53,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:53,598 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:53,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:53,804 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:53,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:53,805 INFO L82 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-01-06 19:21:53,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:53,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679770384] [2021-01-06 19:21:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:56,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:56,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:56,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:56,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-01-06 19:21:56,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679770384] [2021-01-06 19:21:56,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849897615] [2021-01-06 19:21:56,713 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 19:21:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 108 conjunts are in the unsatisfiable core [2021-01-06 19:21:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-01-06 19:21:57,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:57,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 19:21:57,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174762736] [2021-01-06 19:21:57,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 19:21:57,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 19:21:57,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 19:21:57,089 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 56 states. [2021-01-06 19:21:58,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:58,365 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-01-06 19:21:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 19:21:58,366 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 160 [2021-01-06 19:21:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:58,368 INFO L225 Difference]: With dead ends: 94 [2021-01-06 19:21:58,369 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 19:21:58,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 19:21:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 19:21:58,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-01-06 19:21:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 19:21:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-01-06 19:21:58,375 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2021-01-06 19:21:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:58,375 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-01-06 19:21:58,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 19:21:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-01-06 19:21:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 19:21:58,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:58,377 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:58,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 19:21:58,591 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2021-01-06 19:21:58,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:58,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301334716] [2021-01-06 19:21:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:58,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:58,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:58,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:58,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:58,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 19:22:01,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301334716] [2021-01-06 19:22:01,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816001163] [2021-01-06 19:22:01,681 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 19:22:01,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:22:01,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:01,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 112 conjunts are in the unsatisfiable core [2021-01-06 19:22:01,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 19:22:02,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:02,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 19:22:02,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303074125] [2021-01-06 19:22:02,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 19:22:02,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:02,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 19:22:02,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 19:22:02,257 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 58 states. [2021-01-06 19:22:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:03,685 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-01-06 19:22:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 19:22:03,686 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 166 [2021-01-06 19:22:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:03,688 INFO L225 Difference]: With dead ends: 97 [2021-01-06 19:22:03,688 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 19:22:03,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 19:22:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 19:22:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-01-06 19:22:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 19:22:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-01-06 19:22:03,694 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 166 [2021-01-06 19:22:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:03,694 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-01-06 19:22:03,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 19:22:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-01-06 19:22:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-01-06 19:22:03,695 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:03,696 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:03,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 19:22:03,902 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:03,903 INFO L82 PathProgramCache]: Analyzing trace with hash 269143318, now seen corresponding path program 27 times [2021-01-06 19:22:03,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:03,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683475746] [2021-01-06 19:22:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:03,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:04,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:05,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:06,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:06,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:06,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:06,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:06,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:06,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:06,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-01-06 19:22:07,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683475746] [2021-01-06 19:22:07,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548757040] [2021-01-06 19:22:07,383 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 19:22:13,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 19:22:13,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 116 conjunts are in the unsatisfiable core [2021-01-06 19:22:13,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-01-06 19:22:14,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:14,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 19:22:14,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518662791] [2021-01-06 19:22:14,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 19:22:14,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:14,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 19:22:14,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 19:22:14,195 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 60 states. [2021-01-06 19:22:15,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:15,765 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-01-06 19:22:15,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 19:22:15,766 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 172 [2021-01-06 19:22:15,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:15,767 INFO L225 Difference]: With dead ends: 100 [2021-01-06 19:22:15,767 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 19:22:15,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 19:22:15,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 19:22:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-01-06 19:22:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 19:22:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-01-06 19:22:15,773 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 172 [2021-01-06 19:22:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:15,773 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-01-06 19:22:15,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 19:22:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-01-06 19:22:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 19:22:15,775 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:15,775 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:15,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 19:22:15,980 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:15,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1279357492, now seen corresponding path program 28 times [2021-01-06 19:22:15,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:15,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799386765] [2021-01-06 19:22:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:18,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:18,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:18,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:18,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:18,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:18,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:19,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:19,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-01-06 19:22:19,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799386765] [2021-01-06 19:22:19,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624840482] [2021-01-06 19:22:19,637 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 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 19:22:19,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:22:19,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 120 conjunts are in the unsatisfiable core [2021-01-06 19:22:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-01-06 19:22:20,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:20,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-01-06 19:22:20,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700787588] [2021-01-06 19:22:20,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 19:22:20,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:20,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 19:22:20,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 19:22:20,066 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 62 states. [2021-01-06 19:22:21,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:21,744 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-01-06 19:22:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 19:22:21,745 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 178 [2021-01-06 19:22:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:21,746 INFO L225 Difference]: With dead ends: 103 [2021-01-06 19:22:21,746 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 19:22:21,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 19:22:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 19:22:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-01-06 19:22:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 19:22:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-01-06 19:22:21,753 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 178 [2021-01-06 19:22:21,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:21,754 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-01-06 19:22:21,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 19:22:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-01-06 19:22:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 19:22:21,755 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:21,755 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:21,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 19:22:21,971 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:21,972 INFO L82 PathProgramCache]: Analyzing trace with hash -790097834, now seen corresponding path program 29 times [2021-01-06 19:22:21,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:21,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990448522] [2021-01-06 19:22:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:25,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:25,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:25,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 19:22:25,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990448522] [2021-01-06 19:22:25,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032764761] [2021-01-06 19:22:25,851 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 19:22:52,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 19:22:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 124 conjunts are in the unsatisfiable core [2021-01-06 19:22:52,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 19:22:52,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:52,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 19:22:52,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573115034] [2021-01-06 19:22:52,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 19:22:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 19:22:52,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 19:22:52,866 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 64 states. [2021-01-06 19:22:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:54,695 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-01-06 19:22:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 19:22:54,695 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 184 [2021-01-06 19:22:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:54,696 INFO L225 Difference]: With dead ends: 106 [2021-01-06 19:22:54,696 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 19:22:54,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 19:22:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 19:22:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-01-06 19:22:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 19:22:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-01-06 19:22:54,702 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 184 [2021-01-06 19:22:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:54,702 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-01-06 19:22:54,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 19:22:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-01-06 19:22:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 19:22:54,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:54,704 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:54,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:22:54,905 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:54,906 INFO L82 PathProgramCache]: Analyzing trace with hash 609702028, now seen corresponding path program 30 times [2021-01-06 19:22:54,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:54,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197675982] [2021-01-06 19:22:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:57,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:57,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:57,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:57,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:57,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:57,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:57,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:58,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:58,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:58,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:58,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-01-06 19:22:59,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197675982] [2021-01-06 19:22:59,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271023200] [2021-01-06 19:22:59,066 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 19:23:01,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 19:23:01,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:23:01,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 130 conjunts are in the unsatisfiable core [2021-01-06 19:23:01,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:23:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-01-06 19:23:02,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:23:02,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 19:23:02,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453446350] [2021-01-06 19:23:02,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 19:23:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:23:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 19:23:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 19:23:02,326 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 66 states. [2021-01-06 19:23:04,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:23:04,274 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-01-06 19:23:04,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 19:23:04,275 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 190 [2021-01-06 19:23:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:23:04,276 INFO L225 Difference]: With dead ends: 109 [2021-01-06 19:23:04,276 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 19:23:04,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 19:23:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 19:23:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-01-06 19:23:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 19:23:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-01-06 19:23:04,282 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 190 [2021-01-06 19:23:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:23:04,282 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-01-06 19:23:04,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 19:23:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-01-06 19:23:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-01-06 19:23:04,284 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:23:04,284 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:23:04,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:23:04,492 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:23:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:23:04,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1665704854, now seen corresponding path program 31 times [2021-01-06 19:23:04,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:23:04,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712108010] [2021-01-06 19:23:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:23:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:08,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:08,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2021-01-06 19:23:08,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712108010] [2021-01-06 19:23:08,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335114717] [2021-01-06 19:23:08,991 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 19:23:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:09,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 132 conjunts are in the unsatisfiable core [2021-01-06 19:23:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:23:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2021-01-06 19:23:09,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:23:09,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-01-06 19:23:09,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879287524] [2021-01-06 19:23:09,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 19:23:09,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:23:09,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 19:23:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 19:23:09,501 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 68 states. [2021-01-06 19:23:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:23:11,636 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-01-06 19:23:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 19:23:11,637 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 196 [2021-01-06 19:23:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:23:11,638 INFO L225 Difference]: With dead ends: 112 [2021-01-06 19:23:11,638 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 19:23:11,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 19:23:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 19:23:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-01-06 19:23:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 19:23:11,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-01-06 19:23:11,644 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 196 [2021-01-06 19:23:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:23:11,644 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-01-06 19:23:11,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 19:23:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-01-06 19:23:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-01-06 19:23:11,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:23:11,646 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:23:11,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:23:11,862 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:23:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:23:11,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1470481228, now seen corresponding path program 32 times [2021-01-06 19:23:11,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:23:11,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287724205] [2021-01-06 19:23:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:23:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:11,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:12,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:13,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:14,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:14,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:14,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:14,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:14,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:14,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:14,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:15,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:15,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:15,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:15,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:15,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:15,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:16,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-01-06 19:23:16,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287724205] [2021-01-06 19:23:16,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247331514] [2021-01-06 19:23:16,732 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 19:23:16,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:23:16,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:23:16,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 136 conjunts are in the unsatisfiable core [2021-01-06 19:23:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:23:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-01-06 19:23:17,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:23:17,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 19:23:17,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691886498] [2021-01-06 19:23:17,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 19:23:17,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:23:17,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 19:23:17,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 19:23:17,251 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 70 states. [2021-01-06 19:23:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:23:19,490 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2021-01-06 19:23:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 19:23:19,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 202 [2021-01-06 19:23:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:23:19,492 INFO L225 Difference]: With dead ends: 115 [2021-01-06 19:23:19,492 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 19:23:19,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 19:23:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 19:23:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-01-06 19:23:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 19:23:19,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-01-06 19:23:19,499 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 202 [2021-01-06 19:23:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:23:19,499 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-01-06 19:23:19,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 19:23:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-01-06 19:23:19,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-01-06 19:23:19,501 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:23:19,501 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:23:19,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 19:23:19,714 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:23:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:23:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash -716142890, now seen corresponding path program 33 times [2021-01-06 19:23:19,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:23:19,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821703301] [2021-01-06 19:23:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:23:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:19,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:20,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:21,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:21,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:21,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:21,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:21,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:21,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:21,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:21,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:22,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:22,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:22,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:22,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:22,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:22,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:22,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:23,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:23,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:23,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:23,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:23,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:23,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:23,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:24,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:24,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:24,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2021-01-06 19:23:24,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821703301] [2021-01-06 19:23:24,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243798460] [2021-01-06 19:23:24,918 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 19:23:28,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 19:23:28,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:23:28,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 140 conjunts are in the unsatisfiable core [2021-01-06 19:23:28,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:23:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2021-01-06 19:23:29,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:23:29,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 19:23:29,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604259994] [2021-01-06 19:23:29,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 19:23:29,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:23:29,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 19:23:29,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 19:23:29,137 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 72 states. [2021-01-06 19:23:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:23:31,399 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-01-06 19:23:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 19:23:31,399 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 208 [2021-01-06 19:23:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:23:31,401 INFO L225 Difference]: With dead ends: 118 [2021-01-06 19:23:31,401 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 19:23:31,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 19:23:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 19:23:31,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-01-06 19:23:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 19:23:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-01-06 19:23:31,408 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 208 [2021-01-06 19:23:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:23:31,408 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-01-06 19:23:31,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 19:23:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-01-06 19:23:31,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-01-06 19:23:31,410 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:23:31,410 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:23:31,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:23:31,618 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:23:31,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:23:31,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1668946420, now seen corresponding path program 34 times [2021-01-06 19:23:31,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:23:31,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710790799] [2021-01-06 19:23:31,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:23:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:31,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:31,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:32,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:32,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:32,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:32,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:32,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:32,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:32,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:32,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:33,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:33,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:33,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:33,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:33,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:33,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:33,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:33,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:34,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:34,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:34,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:34,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:34,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:34,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:34,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:35,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:35,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:35,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:35,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:35,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:35,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:36,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:36,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:36,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:36,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-01-06 19:23:37,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710790799] [2021-01-06 19:23:37,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598644927] [2021-01-06 19:23:37,205 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 19:23:37,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:23:37,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:23:37,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 144 conjunts are in the unsatisfiable core [2021-01-06 19:23:37,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:23:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3502 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2021-01-06 19:23:37,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:23:37,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-01-06 19:23:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418387855] [2021-01-06 19:23:37,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 19:23:37,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:23:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 19:23:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 19:23:37,705 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 74 states. [2021-01-06 19:23:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:23:40,257 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2021-01-06 19:23:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 19:23:40,258 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 214 [2021-01-06 19:23:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:23:40,259 INFO L225 Difference]: With dead ends: 121 [2021-01-06 19:23:40,260 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 19:23:40,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=146, Invalid=5256, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 19:23:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 19:23:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-01-06 19:23:40,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2021-01-06 19:23:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-01-06 19:23:40,266 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 214 [2021-01-06 19:23:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:23:40,267 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-01-06 19:23:40,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 19:23:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-01-06 19:23:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-01-06 19:23:40,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:23:40,269 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:23:40,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 19:23:40,481 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:23:40,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:23:40,482 INFO L82 PathProgramCache]: Analyzing trace with hash 975419926, now seen corresponding path program 35 times [2021-01-06 19:23:40,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:23:40,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182261128] [2021-01-06 19:23:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:23:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:45,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:45,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:45,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:45,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-01-06 19:23:46,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182261128] [2021-01-06 19:23:46,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128912544] [2021-01-06 19:23:46,477 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 19:24:05,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 19:24:05,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:24:05,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 148 conjunts are in the unsatisfiable core [2021-01-06 19:24:05,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:24:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2021-01-06 19:24:05,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:24:05,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-01-06 19:24:05,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141686897] [2021-01-06 19:24:05,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 19:24:05,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:24:05,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 19:24:05,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 19:24:05,807 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 76 states. [2021-01-06 19:24:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:24:08,483 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2021-01-06 19:24:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 19:24:08,484 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 220 [2021-01-06 19:24:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:24:08,486 INFO L225 Difference]: With dead ends: 124 [2021-01-06 19:24:08,486 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 19:24:08,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=150, Invalid=5550, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 19:24:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 19:24:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-01-06 19:24:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 19:24:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2021-01-06 19:24:08,492 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 220 [2021-01-06 19:24:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:24:08,493 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2021-01-06 19:24:08,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 19:24:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2021-01-06 19:24:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-01-06 19:24:08,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:24:08,495 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:24:08,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:24:08,696 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:24:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:24:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash -590104372, now seen corresponding path program 36 times [2021-01-06 19:24:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:24:08,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956573894] [2021-01-06 19:24:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:24:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:08,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:08,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:10,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:10,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:10,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:10,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:10,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:10,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:10,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:11,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:11,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:11,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:11,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:11,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:11,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:11,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:12,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:12,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:12,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:12,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:12,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:12,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:13,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:13,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:13,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:13,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:14,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-01-06 19:24:14,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956573894] [2021-01-06 19:24:14,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823086655] [2021-01-06 19:24:14,804 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 19:24:19,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 19:24:19,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:24:19,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 166 conjunts are in the unsatisfiable core [2021-01-06 19:24:19,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:24:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 71 proven. 1962 refuted. 0 times theorem prover too weak. 1891 trivial. 0 not checked. [2021-01-06 19:24:19,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:24:19,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 79] total 81 [2021-01-06 19:24:19,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56072828] [2021-01-06 19:24:19,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 19:24:19,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:24:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 19:24:19,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 19:24:19,880 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 81 states. [2021-01-06 19:24:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:24:29,871 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2021-01-06 19:24:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 19:24:29,872 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 226 [2021-01-06 19:24:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:24:29,873 INFO L225 Difference]: With dead ends: 127 [2021-01-06 19:24:29,873 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 19:24:29,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=602, Invalid=23268, Unknown=0, NotChecked=0, Total=23870 [2021-01-06 19:24:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 19:24:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-01-06 19:24:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 19:24:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2021-01-06 19:24:29,881 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 226 [2021-01-06 19:24:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:24:29,881 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2021-01-06 19:24:29,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 19:24:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2021-01-06 19:24:29,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-01-06 19:24:29,882 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:24:29,883 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:24:30,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 19:24:30,087 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:24:30,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:24:30,088 INFO L82 PathProgramCache]: Analyzing trace with hash -370786986, now seen corresponding path program 37 times [2021-01-06 19:24:30,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:24:30,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607617862] [2021-01-06 19:24:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:24:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:34,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:34,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:34,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:34,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:34,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:35,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:35,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:35,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:35,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:35,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:36,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2021-01-06 19:24:36,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607617862] [2021-01-06 19:24:36,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109549738] [2021-01-06 19:24:36,954 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 19:24:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 156 conjunts are in the unsatisfiable core [2021-01-06 19:24:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:24:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2021-01-06 19:24:37,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:24:37,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-01-06 19:24:37,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394515279] [2021-01-06 19:24:37,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 19:24:37,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:24:37,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 19:24:37,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 19:24:37,533 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 80 states. [2021-01-06 19:24:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:24:40,761 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-01-06 19:24:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 19:24:40,762 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 232 [2021-01-06 19:24:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:24:40,763 INFO L225 Difference]: With dead ends: 130 [2021-01-06 19:24:40,764 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 19:24:40,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=158, Invalid=6162, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 19:24:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 19:24:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-01-06 19:24:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2021-01-06 19:24:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2021-01-06 19:24:40,769 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 232 [2021-01-06 19:24:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:24:40,769 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2021-01-06 19:24:40,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 19:24:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2021-01-06 19:24:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-01-06 19:24:40,771 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:24:40,771 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:24:40,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 19:24:40,977 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:24:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:24:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1567308684, now seen corresponding path program 38 times [2021-01-06 19:24:40,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:24:40,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885545727] [2021-01-06 19:24:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:24:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:41,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:41,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:41,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:41,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:41,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:41,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:42,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:42,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:42,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:42,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:42,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:42,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:42,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:42,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:43,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat