/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/float-benchs/divmul_diverge.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:06:21,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:06:21,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:06:21,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:06:21,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:06:21,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:06:21,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:06:21,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:06:21,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:06:21,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:06:21,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:06:21,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:06:21,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:06:21,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:06:21,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:06:21,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:06:21,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:06:21,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:06:21,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:06:21,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:06:21,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:06:21,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:06:21,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:06:21,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:06:21,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 06:06:21,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 06:06:21,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 06:06:21,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 06:06:21,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 06:06:21,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 06:06:21,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:06:21,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:06:21,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:06:21,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:06:21,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:06:21,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:06:21,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:06:21,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:06:21,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:06:21,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:06:21,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:06:21,702 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:06:21,746 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:06:21,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:06:21,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:06:21,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:06:21,752 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:06:21,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:06:21,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:06:21,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:06:21,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:06:21,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:06:21,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:06:21,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:06:21,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:06:21,755 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:06:21,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:06:21,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:06:21,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:06:21,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:06:21,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:06:21,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:06:21,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:06:21,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:06:21,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:06:21,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:06:21,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:06:21,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:06:22,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:06:22,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:06:22,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:06:22,226 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:06:22,227 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:06:22,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/divmul_diverge.c [2020-12-23 06:06:22,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8dcbbfc7c/2d7595da826444ba97ce7c5afd104a06/FLAGd102654f9 [2020-12-23 06:06:22,969 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:06:22,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/divmul_diverge.c [2020-12-23 06:06:22,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8dcbbfc7c/2d7595da826444ba97ce7c5afd104a06/FLAGd102654f9 [2020-12-23 06:06:23,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8dcbbfc7c/2d7595da826444ba97ce7c5afd104a06 [2020-12-23 06:06:23,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:06:23,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:06:23,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:06:23,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:06:23,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:06:23,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62248d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23, skipping insertion in model container [2020-12-23 06:06:23,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:06:23,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:06:23,589 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 06:06:23,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:06:23,631 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:06:23,649 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-23 06:06:23,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:06:23,686 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:06:23,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23 WrapperNode [2020-12-23 06:06:23,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:06:23,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:06:23,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:06:23,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:06:23,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:06:23,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:06:23,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:06:23,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:06:23,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... [2020-12-23 06:06:23,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:06:23,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:06:23,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:06:23,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:06:23,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:06:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:06:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:06:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:06:23,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:06:24,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:06:24,275 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 06:06:24,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:24 BoogieIcfgContainer [2020-12-23 06:06:24,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:06:24,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:06:24,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:06:24,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:06:24,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:06:23" (1/3) ... [2020-12-23 06:06:24,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466c59d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:06:24, skipping insertion in model container [2020-12-23 06:06:24,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:06:23" (2/3) ... [2020-12-23 06:06:24,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466c59d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:06:24, skipping insertion in model container [2020-12-23 06:06:24,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:06:24" (3/3) ... [2020-12-23 06:06:24,287 INFO L111 eAbstractionObserver]: Analyzing ICFG divmul_diverge.c [2020-12-23 06:06:24,295 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:06:24,300 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:06:24,322 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:06:24,360 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:06:24,360 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:06:24,361 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:06:24,361 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:06:24,361 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:06:24,361 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:06:24,361 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:06:24,362 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:06:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-12-23 06:06:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:06:24,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:24,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:06:24,391 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:24,398 INFO L82 PathProgramCache]: Analyzing trace with hash 889618939, now seen corresponding path program 1 times [2020-12-23 06:06:24,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:24,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628090067] [2020-12-23 06:06:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:24,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628090067] [2020-12-23 06:06:24,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:06:24,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:06:24,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801360594] [2020-12-23 06:06:24,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:06:24,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:06:24,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:06:24,653 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2020-12-23 06:06:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:24,692 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2020-12-23 06:06:24,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:06:24,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:06:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:24,705 INFO L225 Difference]: With dead ends: 33 [2020-12-23 06:06:24,705 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:06:24,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:06:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:06:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2020-12-23 06:06:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 06:06:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 06:06:24,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 6 [2020-12-23 06:06:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:24,749 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 06:06:24,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:06:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 06:06:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:06:24,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:24,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:24,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:06:24,751 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1271799529, now seen corresponding path program 1 times [2020-12-23 06:06:24,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:24,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232902927] [2020-12-23 06:06:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:24,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232902927] [2020-12-23 06:06:24,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132925877] [2020-12-23 06:06:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:24,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:06:24,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:25,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:06:25,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799873297] [2020-12-23 06:06:25,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:06:25,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:25,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:06:25,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:06:25,009 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 5 states. [2020-12-23 06:06:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:25,032 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 06:06:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:06:25,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 06:06:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:25,034 INFO L225 Difference]: With dead ends: 25 [2020-12-23 06:06:25,034 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 06:06:25,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:06:25,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 06:06:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-23 06:06:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:06:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-23 06:06:25,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-23 06:06:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:25,041 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-23 06:06:25,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:06:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-23 06:06:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:06:25,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:25,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:25,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:06:25,256 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1250006231, now seen corresponding path program 2 times [2020-12-23 06:06:25,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:25,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262306656] [2020-12-23 06:06:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262306656] [2020-12-23 06:06:25,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668464670] [2020-12-23 06:06:25,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:25,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:25,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:25,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:06:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:25,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:06:25,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474704318] [2020-12-23 06:06:25,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:06:25,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:25,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:06:25,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:06:25,422 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-12-23 06:06:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:25,451 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-12-23 06:06:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:06:25,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 06:06:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:25,453 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:06:25,453 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:06:25,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:06:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:06:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-12-23 06:06:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:06:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-23 06:06:25,463 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-12-23 06:06:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:25,464 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-23 06:06:25,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:06:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-23 06:06:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:06:25,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:25,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:25,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:25,683 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash 898393029, now seen corresponding path program 3 times [2020-12-23 06:06:25,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:25,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392335304] [2020-12-23 06:06:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392335304] [2020-12-23 06:06:25,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508517944] [2020-12-23 06:06:25,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:25,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:06:25,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:06:25,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:25,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:25,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:06:25,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911865929] [2020-12-23 06:06:25,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:06:25,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:25,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:06:25,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:06:25,957 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 7 states. [2020-12-23 06:06:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:25,984 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-23 06:06:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:06:25,985 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 06:06:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:25,989 INFO L225 Difference]: With dead ends: 35 [2020-12-23 06:06:25,989 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 06:06:25,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:06:25,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 06:06:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-23 06:06:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:06:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 06:06:25,999 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-12-23 06:06:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:25,999 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 06:06:25,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:06:26,000 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 06:06:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:06:26,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:26,000 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:26,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:26,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash -275117133, now seen corresponding path program 4 times [2020-12-23 06:06:26,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:26,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959995314] [2020-12-23 06:06:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:26,350 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:26,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959995314] [2020-12-23 06:06:26,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233138018] [2020-12-23 06:06:26,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:26,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:26,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:26,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:06:26,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:26,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:26,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:06:26,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877030617] [2020-12-23 06:06:26,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:06:26,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:26,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:06:26,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:06:26,563 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 8 states. [2020-12-23 06:06:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:26,598 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-12-23 06:06:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:06:26,600 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-23 06:06:26,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:26,601 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:06:26,601 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:06:26,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:06:26,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:06:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-12-23 06:06:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 06:06:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-12-23 06:06:26,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 22 [2020-12-23 06:06:26,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:26,610 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-12-23 06:06:26,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:06:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-12-23 06:06:26,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:06:26,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:26,611 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:26,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:26,821 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash 429264033, now seen corresponding path program 5 times [2020-12-23 06:06:26,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:26,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625275327] [2020-12-23 06:06:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:26,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625275327] [2020-12-23 06:06:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136083121] [2020-12-23 06:06:26,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:26,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:06:26,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:06:26,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:27,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:06:27,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205476107] [2020-12-23 06:06:27,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:06:27,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:27,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:06:27,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:06:27,023 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 9 states. [2020-12-23 06:06:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:27,056 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-23 06:06:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:06:27,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-12-23 06:06:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:27,057 INFO L225 Difference]: With dead ends: 45 [2020-12-23 06:06:27,057 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 06:06:27,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:06:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 06:06:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-12-23 06:06:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:06:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-12-23 06:06:27,064 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 26 [2020-12-23 06:06:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:27,064 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-12-23 06:06:27,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:06:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-12-23 06:06:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:06:27,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:27,065 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:27,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:06:27,281 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:27,282 INFO L82 PathProgramCache]: Analyzing trace with hash -223615345, now seen corresponding path program 6 times [2020-12-23 06:06:27,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:27,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819854964] [2020-12-23 06:06:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819854964] [2020-12-23 06:06:27,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664730036] [2020-12-23 06:06:27,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:27,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:06:27,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:27,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:06:27,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:27,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:27,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:06:27,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480704960] [2020-12-23 06:06:27,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:06:27,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:27,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:06:27,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:06:27,600 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2020-12-23 06:06:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:27,639 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-12-23 06:06:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:06:27,640 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-23 06:06:27,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:27,641 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:06:27,641 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:06:27,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:06:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:06:27,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-12-23 06:06:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 06:06:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-12-23 06:06:27,648 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 30 [2020-12-23 06:06:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:27,648 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-12-23 06:06:27,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:06:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-12-23 06:06:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:06:27,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:27,650 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:27,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:27,865 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:27,866 INFO L82 PathProgramCache]: Analyzing trace with hash 944183677, now seen corresponding path program 7 times [2020-12-23 06:06:27,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:27,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927395058] [2020-12-23 06:06:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927395058] [2020-12-23 06:06:28,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633493474] [2020-12-23 06:06:28,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:28,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:06:28,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:28,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:06:28,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684528224] [2020-12-23 06:06:28,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:06:28,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:06:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:06:28,134 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 11 states. [2020-12-23 06:06:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:28,174 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-12-23 06:06:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:06:28,174 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-23 06:06:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:28,175 INFO L225 Difference]: With dead ends: 55 [2020-12-23 06:06:28,175 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 06:06:28,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:06:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 06:06:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-12-23 06:06:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:06:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 06:06:28,182 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 34 [2020-12-23 06:06:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:28,183 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 06:06:28,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:06:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 06:06:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:06:28,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:28,184 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:28,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:28,399 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash 101918059, now seen corresponding path program 8 times [2020-12-23 06:06:28,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:28,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812251907] [2020-12-23 06:06:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812251907] [2020-12-23 06:06:28,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933242192] [2020-12-23 06:06:28,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:28,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:28,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:28,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:06:28,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:28,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:28,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:06:28,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26598449] [2020-12-23 06:06:28,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:06:28,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:28,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:06:28,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:06:28,683 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 12 states. [2020-12-23 06:06:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:28,724 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-12-23 06:06:28,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:06:28,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-12-23 06:06:28,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:28,725 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:06:28,725 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:06:28,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:06:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:06:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-12-23 06:06:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 06:06:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-12-23 06:06:28,735 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-12-23 06:06:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:28,736 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-12-23 06:06:28,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:06:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-12-23 06:06:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:06:28,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:28,739 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:28,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:06:28,955 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1241806247, now seen corresponding path program 9 times [2020-12-23 06:06:28,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:28,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647008692] [2020-12-23 06:06:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647008692] [2020-12-23 06:06:29,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387094769] [2020-12-23 06:06:29,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:29,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:06:29,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:29,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:06:29,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:29,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:06:29,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238451673] [2020-12-23 06:06:29,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:06:29,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:06:29,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:06:29,262 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 13 states. [2020-12-23 06:06:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:29,305 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-12-23 06:06:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:06:29,305 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-12-23 06:06:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:29,306 INFO L225 Difference]: With dead ends: 65 [2020-12-23 06:06:29,306 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 06:06:29,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:06:29,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 06:06:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-12-23 06:06:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 06:06:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-12-23 06:06:29,313 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 42 [2020-12-23 06:06:29,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:29,313 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-12-23 06:06:29,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:06:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-12-23 06:06:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:06:29,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:29,315 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:29,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:29,531 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1070872505, now seen corresponding path program 10 times [2020-12-23 06:06:29,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:29,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267284446] [2020-12-23 06:06:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267284446] [2020-12-23 06:06:29,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570453328] [2020-12-23 06:06:29,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:29,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:29,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:06:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:29,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:29,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:06:29,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278379933] [2020-12-23 06:06:29,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:06:29,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:29,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:06:29,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:06:29,831 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 14 states. [2020-12-23 06:06:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:29,887 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-12-23 06:06:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:06:29,888 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-12-23 06:06:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:29,889 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:06:29,889 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:06:29,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:06:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:06:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-12-23 06:06:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 06:06:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2020-12-23 06:06:29,903 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 46 [2020-12-23 06:06:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:29,903 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2020-12-23 06:06:29,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:06:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2020-12-23 06:06:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:06:29,904 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:29,905 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:30,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:30,113 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:30,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1693491403, now seen corresponding path program 11 times [2020-12-23 06:06:30,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:30,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467723258] [2020-12-23 06:06:30,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:30,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467723258] [2020-12-23 06:06:30,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541123187] [2020-12-23 06:06:30,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:30,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:06:30,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:30,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:06:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:30,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:30,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:06:30,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985748258] [2020-12-23 06:06:30,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:06:30,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:30,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:06:30,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:06:30,444 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand 15 states. [2020-12-23 06:06:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:30,510 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-12-23 06:06:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:06:30,510 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-12-23 06:06:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:30,511 INFO L225 Difference]: With dead ends: 75 [2020-12-23 06:06:30,511 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 06:06:30,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:06:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 06:06:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-12-23 06:06:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:06:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-12-23 06:06:30,517 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 50 [2020-12-23 06:06:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:30,517 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-12-23 06:06:30,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:06:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-12-23 06:06:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:06:30,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:30,519 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:30,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:06:30,732 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:30,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1689137373, now seen corresponding path program 12 times [2020-12-23 06:06:30,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:30,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3517198] [2020-12-23 06:06:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3517198] [2020-12-23 06:06:30,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682654610] [2020-12-23 06:06:30,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:31,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:06:31,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:31,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:06:31,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:31,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:31,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:06:31,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220614020] [2020-12-23 06:06:31,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:06:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:31,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:06:31,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:06:31,109 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 16 states. [2020-12-23 06:06:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:31,164 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2020-12-23 06:06:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:06:31,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-12-23 06:06:31,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:31,165 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:06:31,165 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 06:06:31,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:06:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 06:06:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-12-23 06:06:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 06:06:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-12-23 06:06:31,171 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 54 [2020-12-23 06:06:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:31,171 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-12-23 06:06:31,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:06:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-12-23 06:06:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:06:31,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:31,173 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:31,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:06:31,387 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash -740386799, now seen corresponding path program 13 times [2020-12-23 06:06:31,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:31,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186826856] [2020-12-23 06:06:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:31,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186826856] [2020-12-23 06:06:31,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500651679] [2020-12-23 06:06:31,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:31,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:06:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:31,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:31,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:06:31,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032255797] [2020-12-23 06:06:31,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:06:31,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:31,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:06:31,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:06:31,741 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 17 states. [2020-12-23 06:06:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:31,797 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-12-23 06:06:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:06:31,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-12-23 06:06:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:31,799 INFO L225 Difference]: With dead ends: 85 [2020-12-23 06:06:31,799 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 06:06:31,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:06:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 06:06:31,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-12-23 06:06:31,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:06:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2020-12-23 06:06:31,804 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 58 [2020-12-23 06:06:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:31,805 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2020-12-23 06:06:31,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:06:31,805 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2020-12-23 06:06:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:06:31,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:31,806 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:32,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:06:32,020 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash -169788929, now seen corresponding path program 14 times [2020-12-23 06:06:32,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:32,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452945983] [2020-12-23 06:06:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452945983] [2020-12-23 06:06:32,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322813101] [2020-12-23 06:06:32,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:32,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:06:32,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:32,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:32,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:06:32,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403983431] [2020-12-23 06:06:32,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:06:32,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:06:32,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:06:32,412 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand 18 states. [2020-12-23 06:06:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:32,477 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-12-23 06:06:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:06:32,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-12-23 06:06:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:32,494 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:06:32,494 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:06:32,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:06:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:06:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-12-23 06:06:32,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 06:06:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-12-23 06:06:32,499 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 62 [2020-12-23 06:06:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:32,499 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-12-23 06:06:32,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:06:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-12-23 06:06:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:06:32,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:32,501 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:32,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:32,714 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:32,715 INFO L82 PathProgramCache]: Analyzing trace with hash 818230509, now seen corresponding path program 15 times [2020-12-23 06:06:32,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:32,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848560877] [2020-12-23 06:06:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:32,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848560877] [2020-12-23 06:06:32,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678821920] [2020-12-23 06:06:32,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:33,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:06:33,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:06:33,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:33,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:33,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:06:33,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478478472] [2020-12-23 06:06:33,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:06:33,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:33,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:06:33,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:06:33,135 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 19 states. [2020-12-23 06:06:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:33,198 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2020-12-23 06:06:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:06:33,198 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-12-23 06:06:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:33,199 INFO L225 Difference]: With dead ends: 95 [2020-12-23 06:06:33,199 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 06:06:33,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:06:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 06:06:33,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-12-23 06:06:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 06:06:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-12-23 06:06:33,206 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 66 [2020-12-23 06:06:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:33,206 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-12-23 06:06:33,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:06:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-12-23 06:06:33,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 06:06:33,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:33,208 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:33,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:06:33,422 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:33,423 INFO L82 PathProgramCache]: Analyzing trace with hash 305531099, now seen corresponding path program 16 times [2020-12-23 06:06:33,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:33,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351971670] [2020-12-23 06:06:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:33,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351971670] [2020-12-23 06:06:33,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779930782] [2020-12-23 06:06:33,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:33,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:33,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:33,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:06:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:33,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:33,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:06:33,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110729209] [2020-12-23 06:06:33,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:06:33,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:33,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:06:33,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:06:33,846 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 20 states. [2020-12-23 06:06:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:33,916 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2020-12-23 06:06:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:06:33,916 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2020-12-23 06:06:33,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:33,917 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:06:33,917 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 06:06:33,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:06:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 06:06:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-12-23 06:06:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 06:06:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-12-23 06:06:33,922 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 70 [2020-12-23 06:06:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:33,922 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-12-23 06:06:33,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:06:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-12-23 06:06:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 06:06:33,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:33,924 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:34,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:06:34,140 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:34,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1713321417, now seen corresponding path program 17 times [2020-12-23 06:06:34,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:34,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589086210] [2020-12-23 06:06:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:34,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589086210] [2020-12-23 06:06:34,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670134939] [2020-12-23 06:06:34,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:34,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:06:34,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:06:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:34,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:34,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:06:34,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231834934] [2020-12-23 06:06:34,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:06:34,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:06:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:06:34,563 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 21 states. [2020-12-23 06:06:34,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:34,643 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2020-12-23 06:06:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:06:34,644 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2020-12-23 06:06:34,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:34,645 INFO L225 Difference]: With dead ends: 105 [2020-12-23 06:06:34,645 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 06:06:34,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:06:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 06:06:34,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-12-23 06:06:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 06:06:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-12-23 06:06:34,650 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 74 [2020-12-23 06:06:34,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:34,650 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-12-23 06:06:34,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:06:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-12-23 06:06:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 06:06:34,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:34,652 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:34,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:06:34,865 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash 380386231, now seen corresponding path program 18 times [2020-12-23 06:06:34,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:34,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832494006] [2020-12-23 06:06:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:35,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832494006] [2020-12-23 06:06:35,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710445103] [2020-12-23 06:06:35,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:35,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:06:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:06:35,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:35,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:35,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:06:35,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111685490] [2020-12-23 06:06:35,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:06:35,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:06:35,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:06:35,357 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 22 states. [2020-12-23 06:06:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:35,438 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-12-23 06:06:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:06:35,439 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-12-23 06:06:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:35,440 INFO L225 Difference]: With dead ends: 110 [2020-12-23 06:06:35,440 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 06:06:35,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:06:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 06:06:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-12-23 06:06:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 06:06:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2020-12-23 06:06:35,445 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 78 [2020-12-23 06:06:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:35,446 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2020-12-23 06:06:35,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:06:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2020-12-23 06:06:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 06:06:35,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:35,447 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:35,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:35,662 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:35,662 INFO L82 PathProgramCache]: Analyzing trace with hash 206084773, now seen corresponding path program 19 times [2020-12-23 06:06:35,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:35,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516916069] [2020-12-23 06:06:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:36,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516916069] [2020-12-23 06:06:36,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268307553] [2020-12-23 06:06:36,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:36,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:06:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:36,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:36,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:06:36,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178161154] [2020-12-23 06:06:36,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:06:36,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:36,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:06:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:06:36,155 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand 23 states. [2020-12-23 06:06:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:36,239 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2020-12-23 06:06:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:06:36,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 82 [2020-12-23 06:06:36,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:36,241 INFO L225 Difference]: With dead ends: 115 [2020-12-23 06:06:36,241 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 06:06:36,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:06:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 06:06:36,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-12-23 06:06:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 06:06:36,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2020-12-23 06:06:36,246 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 82 [2020-12-23 06:06:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:36,246 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2020-12-23 06:06:36,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:06:36,246 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2020-12-23 06:06:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 06:06:36,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:36,247 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:36,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:36,460 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 228577939, now seen corresponding path program 20 times [2020-12-23 06:06:36,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:36,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098885] [2020-12-23 06:06:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:36,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098885] [2020-12-23 06:06:36,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782061262] [2020-12-23 06:06:36,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:36,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:36,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:06:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:36,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:36,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:06:36,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508072332] [2020-12-23 06:06:36,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:06:36,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:36,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:06:36,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:06:36,983 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand 24 states. [2020-12-23 06:06:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:37,066 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2020-12-23 06:06:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:06:37,066 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-23 06:06:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:37,068 INFO L225 Difference]: With dead ends: 120 [2020-12-23 06:06:37,068 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 06:06:37,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:06:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 06:06:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2020-12-23 06:06:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 06:06:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2020-12-23 06:06:37,074 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 86 [2020-12-23 06:06:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:37,074 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2020-12-23 06:06:37,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:06:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2020-12-23 06:06:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:06:37,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:37,075 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:37,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:06:37,276 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:37,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:37,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1617075327, now seen corresponding path program 21 times [2020-12-23 06:06:37,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:37,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42606522] [2020-12-23 06:06:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:37,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42606522] [2020-12-23 06:06:37,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219809614] [2020-12-23 06:06:37,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:37,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:06:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:06:37,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:38,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:38,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:06:38,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843445566] [2020-12-23 06:06:38,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:06:38,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:38,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:06:38,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:06:38,006 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 25 states. [2020-12-23 06:06:38,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:38,093 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-12-23 06:06:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:06:38,094 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 90 [2020-12-23 06:06:38,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:38,095 INFO L225 Difference]: With dead ends: 125 [2020-12-23 06:06:38,095 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 06:06:38,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:06:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 06:06:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-12-23 06:06:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 06:06:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2020-12-23 06:06:38,100 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 90 [2020-12-23 06:06:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:38,100 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2020-12-23 06:06:38,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:06:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2020-12-23 06:06:38,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 06:06:38,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:38,102 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:38,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:06:38,315 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:38,316 INFO L82 PathProgramCache]: Analyzing trace with hash -445854353, now seen corresponding path program 22 times [2020-12-23 06:06:38,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:38,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978097464] [2020-12-23 06:06:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:38,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978097464] [2020-12-23 06:06:38,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612567059] [2020-12-23 06:06:38,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:38,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:38,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:38,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:06:38,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:39,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:39,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:06:39,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529411471] [2020-12-23 06:06:39,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:06:39,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:06:39,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:06:39,024 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 26 states. [2020-12-23 06:06:39,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:39,118 INFO L93 Difference]: Finished difference Result 130 states and 154 transitions. [2020-12-23 06:06:39,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:06:39,118 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-12-23 06:06:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:39,120 INFO L225 Difference]: With dead ends: 130 [2020-12-23 06:06:39,120 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 06:06:39,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:06:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 06:06:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2020-12-23 06:06:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 06:06:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2020-12-23 06:06:39,126 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 94 [2020-12-23 06:06:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:39,127 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2020-12-23 06:06:39,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:06:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2020-12-23 06:06:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 06:06:39,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:39,128 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:39,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:39,344 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2139516835, now seen corresponding path program 23 times [2020-12-23 06:06:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:39,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513639670] [2020-12-23 06:06:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:39,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513639670] [2020-12-23 06:06:39,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783810528] [2020-12-23 06:06:39,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:39,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 06:06:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:06:39,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:39,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:39,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:06:39,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832211723] [2020-12-23 06:06:39,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:06:39,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:06:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:06:39,954 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand 27 states. [2020-12-23 06:06:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:40,062 INFO L93 Difference]: Finished difference Result 135 states and 160 transitions. [2020-12-23 06:06:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:06:40,062 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 98 [2020-12-23 06:06:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:40,064 INFO L225 Difference]: With dead ends: 135 [2020-12-23 06:06:40,064 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 06:06:40,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:06:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 06:06:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-12-23 06:06:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 06:06:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 151 transitions. [2020-12-23 06:06:40,069 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 151 transitions. Word has length 98 [2020-12-23 06:06:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:40,069 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 151 transitions. [2020-12-23 06:06:40,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:06:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 151 transitions. [2020-12-23 06:06:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 06:06:40,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:40,071 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:40,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:06:40,285 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:40,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:40,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1886334027, now seen corresponding path program 24 times [2020-12-23 06:06:40,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:40,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947188764] [2020-12-23 06:06:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:40,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947188764] [2020-12-23 06:06:40,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585965648] [2020-12-23 06:06:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:40,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:06:40,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:40,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:06:40,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:40,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:40,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:06:40,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874040570] [2020-12-23 06:06:40,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:06:40,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:40,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:06:40,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:06:40,935 INFO L87 Difference]: Start difference. First operand 127 states and 151 transitions. Second operand 28 states. [2020-12-23 06:06:41,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:41,028 INFO L93 Difference]: Finished difference Result 140 states and 166 transitions. [2020-12-23 06:06:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:06:41,028 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 102 [2020-12-23 06:06:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:41,029 INFO L225 Difference]: With dead ends: 140 [2020-12-23 06:06:41,030 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 06:06:41,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:06:41,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 06:06:41,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-12-23 06:06:41,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 06:06:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2020-12-23 06:06:41,034 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 102 [2020-12-23 06:06:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:41,035 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2020-12-23 06:06:41,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:06:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2020-12-23 06:06:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 06:06:41,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:41,036 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:41,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:41,250 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash -214359751, now seen corresponding path program 25 times [2020-12-23 06:06:41,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:41,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438563672] [2020-12-23 06:06:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:41,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438563672] [2020-12-23 06:06:41,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356037839] [2020-12-23 06:06:41,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:41,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:06:41,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:41,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:41,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:06:41,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441491352] [2020-12-23 06:06:41,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:06:41,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:41,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:06:41,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:06:41,925 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand 29 states. [2020-12-23 06:06:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:42,037 INFO L93 Difference]: Finished difference Result 145 states and 172 transitions. [2020-12-23 06:06:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:06:42,038 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 106 [2020-12-23 06:06:42,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:42,040 INFO L225 Difference]: With dead ends: 145 [2020-12-23 06:06:42,040 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 06:06:42,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:06:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 06:06:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2020-12-23 06:06:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 06:06:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2020-12-23 06:06:42,045 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 106 [2020-12-23 06:06:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:42,045 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2020-12-23 06:06:42,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:06:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2020-12-23 06:06:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 06:06:42,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:42,046 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:42,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:06:42,260 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:42,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1694691111, now seen corresponding path program 26 times [2020-12-23 06:06:42,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:42,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534794658] [2020-12-23 06:06:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:42,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534794658] [2020-12-23 06:06:42,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413087288] [2020-12-23 06:06:42,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:42,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:42,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:06:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:43,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:43,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:06:43,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54982507] [2020-12-23 06:06:43,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:06:43,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:43,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:06:43,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:06:43,012 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand 30 states. [2020-12-23 06:06:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:43,127 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2020-12-23 06:06:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:06:43,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 110 [2020-12-23 06:06:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:43,130 INFO L225 Difference]: With dead ends: 150 [2020-12-23 06:06:43,130 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 06:06:43,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:06:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 06:06:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2020-12-23 06:06:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 06:06:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 169 transitions. [2020-12-23 06:06:43,136 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 169 transitions. Word has length 110 [2020-12-23 06:06:43,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:43,136 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 169 transitions. [2020-12-23 06:06:43,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:06:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 169 transitions. [2020-12-23 06:06:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 06:06:43,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:43,138 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:43,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:06:43,352 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:43,353 INFO L82 PathProgramCache]: Analyzing trace with hash 540546581, now seen corresponding path program 27 times [2020-12-23 06:06:43,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:43,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564921220] [2020-12-23 06:06:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:43,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564921220] [2020-12-23 06:06:43,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514254712] [2020-12-23 06:06:43,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:43,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:06:43,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:06:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:44,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:44,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:06:44,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183861484] [2020-12-23 06:06:44,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:06:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:06:44,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:06:44,103 INFO L87 Difference]: Start difference. First operand 142 states and 169 transitions. Second operand 31 states. [2020-12-23 06:06:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:44,204 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2020-12-23 06:06:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:06:44,205 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 114 [2020-12-23 06:06:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:44,206 INFO L225 Difference]: With dead ends: 155 [2020-12-23 06:06:44,206 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 06:06:44,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:06:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 06:06:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2020-12-23 06:06:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 06:06:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2020-12-23 06:06:44,211 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 114 [2020-12-23 06:06:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:44,212 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2020-12-23 06:06:44,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:06:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2020-12-23 06:06:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 06:06:44,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:44,213 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:44,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:06:44,427 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:44,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1568937475, now seen corresponding path program 28 times [2020-12-23 06:06:44,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:44,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663782700] [2020-12-23 06:06:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:45,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663782700] [2020-12-23 06:06:45,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273425595] [2020-12-23 06:06:45,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:45,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:45,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:45,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:06:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:45,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:45,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:06:45,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915264195] [2020-12-23 06:06:45,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:06:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:06:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:06:45,236 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 32 states. [2020-12-23 06:06:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:45,372 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2020-12-23 06:06:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:06:45,373 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 118 [2020-12-23 06:06:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:45,374 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:06:45,374 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 06:06:45,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:06:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 06:06:45,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-12-23 06:06:45,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 06:06:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2020-12-23 06:06:45,379 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 118 [2020-12-23 06:06:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:45,379 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2020-12-23 06:06:45,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:06:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2020-12-23 06:06:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 06:06:45,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:45,381 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:45,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:06:45,594 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:45,595 INFO L82 PathProgramCache]: Analyzing trace with hash 332558065, now seen corresponding path program 29 times [2020-12-23 06:06:45,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:45,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855586814] [2020-12-23 06:06:45,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:46,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855586814] [2020-12-23 06:06:46,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942325780] [2020-12-23 06:06:46,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:46,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 06:06:46,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:06:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:46,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:46,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:06:46,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452018764] [2020-12-23 06:06:46,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:06:46,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:46,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:06:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:06:46,463 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand 33 states. [2020-12-23 06:06:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:46,594 INFO L93 Difference]: Finished difference Result 165 states and 196 transitions. [2020-12-23 06:06:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:06:46,596 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 122 [2020-12-23 06:06:46,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:46,598 INFO L225 Difference]: With dead ends: 165 [2020-12-23 06:06:46,598 INFO L226 Difference]: Without dead ends: 161 [2020-12-23 06:06:46,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:06:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-23 06:06:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-12-23 06:06:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 06:06:46,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2020-12-23 06:06:46,606 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 122 [2020-12-23 06:06:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:46,606 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2020-12-23 06:06:46,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:06:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2020-12-23 06:06:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 06:06:46,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:46,607 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:46,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:46,823 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash -665935649, now seen corresponding path program 30 times [2020-12-23 06:06:46,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:46,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966111214] [2020-12-23 06:06:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:47,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966111214] [2020-12-23 06:06:47,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459455084] [2020-12-23 06:06:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:47,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:06:47,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:06:47,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:47,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:47,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:06:47,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553549096] [2020-12-23 06:06:47,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:06:47,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:47,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:06:47,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:06:47,683 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand 34 states. [2020-12-23 06:06:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:47,843 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2020-12-23 06:06:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:06:47,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 126 [2020-12-23 06:06:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:47,846 INFO L225 Difference]: With dead ends: 170 [2020-12-23 06:06:47,846 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 06:06:47,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:06:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 06:06:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-12-23 06:06:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 06:06:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 193 transitions. [2020-12-23 06:06:47,851 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 193 transitions. Word has length 126 [2020-12-23 06:06:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:47,852 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 193 transitions. [2020-12-23 06:06:47,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:06:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 193 transitions. [2020-12-23 06:06:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 06:06:47,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:47,853 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:48,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:48,069 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1100731443, now seen corresponding path program 31 times [2020-12-23 06:06:48,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:48,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781073263] [2020-12-23 06:06:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:48,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781073263] [2020-12-23 06:06:48,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038075472] [2020-12-23 06:06:48,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:48,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:06:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:49,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:49,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:06:49,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381354119] [2020-12-23 06:06:49,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:06:49,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:06:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:06:49,037 INFO L87 Difference]: Start difference. First operand 162 states and 193 transitions. Second operand 35 states. [2020-12-23 06:06:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:49,169 INFO L93 Difference]: Finished difference Result 175 states and 208 transitions. [2020-12-23 06:06:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:06:49,170 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 130 [2020-12-23 06:06:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:49,171 INFO L225 Difference]: With dead ends: 175 [2020-12-23 06:06:49,171 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 06:06:49,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:06:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 06:06:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2020-12-23 06:06:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 06:06:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2020-12-23 06:06:49,181 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 130 [2020-12-23 06:06:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:49,182 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2020-12-23 06:06:49,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:06:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2020-12-23 06:06:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 06:06:49,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:49,183 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:49,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:49,398 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash 935235515, now seen corresponding path program 32 times [2020-12-23 06:06:49,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:49,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233541343] [2020-12-23 06:06:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:50,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233541343] [2020-12-23 06:06:50,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444278465] [2020-12-23 06:06:50,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:50,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:50,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:50,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:06:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:50,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:50,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:06:50,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401997823] [2020-12-23 06:06:50,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:06:50,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:06:50,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:06:50,341 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand 36 states. [2020-12-23 06:06:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:50,496 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2020-12-23 06:06:50,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:06:50,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 134 [2020-12-23 06:06:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:50,498 INFO L225 Difference]: With dead ends: 180 [2020-12-23 06:06:50,498 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 06:06:50,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:06:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 06:06:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2020-12-23 06:06:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 06:06:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2020-12-23 06:06:50,504 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 134 [2020-12-23 06:06:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:50,504 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2020-12-23 06:06:50,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:06:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2020-12-23 06:06:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 06:06:50,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:50,506 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:50,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:06:50,720 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:50,721 INFO L82 PathProgramCache]: Analyzing trace with hash -196522839, now seen corresponding path program 33 times [2020-12-23 06:06:50,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:50,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093741942] [2020-12-23 06:06:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:51,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093741942] [2020-12-23 06:06:51,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31430442] [2020-12-23 06:06:51,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:51,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 06:06:51,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:51,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:06:51,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:51,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:51,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:06:51,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874090370] [2020-12-23 06:06:51,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:06:51,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:51,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:06:51,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:06:51,796 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand 37 states. [2020-12-23 06:06:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:51,954 INFO L93 Difference]: Finished difference Result 185 states and 220 transitions. [2020-12-23 06:06:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:06:51,954 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-12-23 06:06:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:51,955 INFO L225 Difference]: With dead ends: 185 [2020-12-23 06:06:51,955 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 06:06:51,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:06:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 06:06:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2020-12-23 06:06:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 06:06:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2020-12-23 06:06:51,961 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 138 [2020-12-23 06:06:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:51,962 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2020-12-23 06:06:51,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:06:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2020-12-23 06:06:51,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 06:06:51,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:51,963 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:52,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:52,179 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:52,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:52,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1037049193, now seen corresponding path program 34 times [2020-12-23 06:06:52,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:52,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494442632] [2020-12-23 06:06:52,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:52,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494442632] [2020-12-23 06:06:52,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946219309] [2020-12-23 06:06:52,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:53,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:06:53,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:53,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:06:53,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:53,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:53,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:06:53,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713220203] [2020-12-23 06:06:53,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:06:53,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:53,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:06:53,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:06:53,190 INFO L87 Difference]: Start difference. First operand 177 states and 211 transitions. Second operand 38 states. [2020-12-23 06:06:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:53,342 INFO L93 Difference]: Finished difference Result 190 states and 226 transitions. [2020-12-23 06:06:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:06:53,342 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 142 [2020-12-23 06:06:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:53,344 INFO L225 Difference]: With dead ends: 190 [2020-12-23 06:06:53,344 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 06:06:53,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:06:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 06:06:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2020-12-23 06:06:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 06:06:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2020-12-23 06:06:53,350 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 142 [2020-12-23 06:06:53,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:53,351 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2020-12-23 06:06:53,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:06:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2020-12-23 06:06:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 06:06:53,352 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:53,352 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:53,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:06:53,565 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:53,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:53,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1843253637, now seen corresponding path program 35 times [2020-12-23 06:06:53,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:53,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281040091] [2020-12-23 06:06:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:54,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281040091] [2020-12-23 06:06:54,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762833813] [2020-12-23 06:06:54,477 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 [2020-12-23 06:06:54,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 06:06:54,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:54,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:06:54,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:54,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:54,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:06:54,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355991159] [2020-12-23 06:06:54,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:06:54,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:06:54,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:06:54,748 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand 39 states. [2020-12-23 06:06:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:54,905 INFO L93 Difference]: Finished difference Result 195 states and 232 transitions. [2020-12-23 06:06:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:06:54,906 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 146 [2020-12-23 06:06:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:54,907 INFO L225 Difference]: With dead ends: 195 [2020-12-23 06:06:54,907 INFO L226 Difference]: Without dead ends: 191 [2020-12-23 06:06:54,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:06:54,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-23 06:06:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2020-12-23 06:06:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 06:06:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 223 transitions. [2020-12-23 06:06:54,913 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 223 transitions. Word has length 146 [2020-12-23 06:06:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:54,913 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 223 transitions. [2020-12-23 06:06:54,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:06:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 223 transitions. [2020-12-23 06:06:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 06:06:54,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:54,915 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:55,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:55,131 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:55,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:55,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1577150093, now seen corresponding path program 36 times [2020-12-23 06:06:55,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:55,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258223843] [2020-12-23 06:06:55,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:56,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258223843] [2020-12-23 06:06:56,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292827481] [2020-12-23 06:06:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:56,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:06:56,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:06:56,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:56,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:56,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:06:56,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044020485] [2020-12-23 06:06:56,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:06:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:06:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:06:56,362 INFO L87 Difference]: Start difference. First operand 187 states and 223 transitions. Second operand 40 states. [2020-12-23 06:06:56,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:56,565 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-12-23 06:06:56,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:06:56,566 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2020-12-23 06:06:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:56,567 INFO L225 Difference]: With dead ends: 200 [2020-12-23 06:06:56,567 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 06:06:56,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:06:56,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 06:06:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-12-23 06:06:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 06:06:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2020-12-23 06:06:56,573 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 150 [2020-12-23 06:06:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:56,573 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2020-12-23 06:06:56,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:06:56,573 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2020-12-23 06:06:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 06:06:56,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:56,574 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:56,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:06:56,788 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:56,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:56,788 INFO L82 PathProgramCache]: Analyzing trace with hash -948061599, now seen corresponding path program 37 times [2020-12-23 06:06:56,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:56,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776613827] [2020-12-23 06:06:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:57,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776613827] [2020-12-23 06:06:57,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062291793] [2020-12-23 06:06:57,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:57,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:06:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:57,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:57,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:06:57,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960502209] [2020-12-23 06:06:57,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:06:57,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:57,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:06:57,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:06:57,973 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand 41 states. [2020-12-23 06:06:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:58,170 INFO L93 Difference]: Finished difference Result 205 states and 244 transitions. [2020-12-23 06:06:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:06:58,170 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 154 [2020-12-23 06:06:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:58,171 INFO L225 Difference]: With dead ends: 205 [2020-12-23 06:06:58,171 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 06:06:58,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:06:58,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 06:06:58,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 197. [2020-12-23 06:06:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 06:06:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 235 transitions. [2020-12-23 06:06:58,176 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 235 transitions. Word has length 154 [2020-12-23 06:06:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:58,177 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 235 transitions. [2020-12-23 06:06:58,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:06:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 235 transitions. [2020-12-23 06:06:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 06:06:58,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:58,178 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:06:58,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:06:58,394 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:06:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:06:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash -444156849, now seen corresponding path program 38 times [2020-12-23 06:06:58,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:06:58,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87668970] [2020-12-23 06:06:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:06:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:06:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:59,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87668970] [2020-12-23 06:06:59,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526749018] [2020-12-23 06:06:59,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:06:59,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:06:59,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:06:59,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:06:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:06:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:06:59,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:06:59,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:06:59,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135526493] [2020-12-23 06:06:59,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:06:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:06:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:06:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:06:59,633 INFO L87 Difference]: Start difference. First operand 197 states and 235 transitions. Second operand 42 states. [2020-12-23 06:06:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:06:59,794 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2020-12-23 06:06:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:06:59,795 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2020-12-23 06:06:59,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:06:59,796 INFO L225 Difference]: With dead ends: 210 [2020-12-23 06:06:59,796 INFO L226 Difference]: Without dead ends: 206 [2020-12-23 06:06:59,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:06:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-23 06:06:59,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 202. [2020-12-23 06:06:59,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 06:06:59,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2020-12-23 06:06:59,801 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 158 [2020-12-23 06:06:59,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:06:59,802 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2020-12-23 06:06:59,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:06:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2020-12-23 06:06:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 06:06:59,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:06:59,803 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:00,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:07:00,016 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:00,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2121988291, now seen corresponding path program 39 times [2020-12-23 06:07:00,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:00,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270502987] [2020-12-23 06:07:00,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270502987] [2020-12-23 06:07:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851519891] [2020-12-23 06:07:01,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:01,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:07:01,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:07:01,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:01,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:01,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:07:01,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322106891] [2020-12-23 06:07:01,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:07:01,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:07:01,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:07:01,401 INFO L87 Difference]: Start difference. First operand 202 states and 241 transitions. Second operand 43 states. [2020-12-23 06:07:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:01,645 INFO L93 Difference]: Finished difference Result 215 states and 256 transitions. [2020-12-23 06:07:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:07:01,646 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 162 [2020-12-23 06:07:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:01,648 INFO L225 Difference]: With dead ends: 215 [2020-12-23 06:07:01,648 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 06:07:01,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:07:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 06:07:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2020-12-23 06:07:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 06:07:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 247 transitions. [2020-12-23 06:07:01,655 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 247 transitions. Word has length 162 [2020-12-23 06:07:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:01,655 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 247 transitions. [2020-12-23 06:07:01,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:07:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 247 transitions. [2020-12-23 06:07:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 06:07:01,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:01,657 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:01,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:07:01,869 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2133078827, now seen corresponding path program 40 times [2020-12-23 06:07:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:01,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250041199] [2020-12-23 06:07:01,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:02,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250041199] [2020-12-23 06:07:02,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760937873] [2020-12-23 06:07:02,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:03,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:03,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:03,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:07:03,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:03,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:03,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:07:03,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987090770] [2020-12-23 06:07:03,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:07:03,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:07:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:07:03,286 INFO L87 Difference]: Start difference. First operand 207 states and 247 transitions. Second operand 44 states. [2020-12-23 06:07:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:03,500 INFO L93 Difference]: Finished difference Result 220 states and 262 transitions. [2020-12-23 06:07:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:07:03,501 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 166 [2020-12-23 06:07:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:03,502 INFO L225 Difference]: With dead ends: 220 [2020-12-23 06:07:03,503 INFO L226 Difference]: Without dead ends: 216 [2020-12-23 06:07:03,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:07:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-23 06:07:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2020-12-23 06:07:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-23 06:07:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 253 transitions. [2020-12-23 06:07:03,509 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 253 transitions. Word has length 166 [2020-12-23 06:07:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:03,509 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 253 transitions. [2020-12-23 06:07:03,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:07:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 253 transitions. [2020-12-23 06:07:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-23 06:07:03,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:03,511 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:03,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:03,713 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:03,714 INFO L82 PathProgramCache]: Analyzing trace with hash 5224473, now seen corresponding path program 41 times [2020-12-23 06:07:03,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:03,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726011588] [2020-12-23 06:07:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:04,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726011588] [2020-12-23 06:07:04,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730832603] [2020-12-23 06:07:04,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:05,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 06:07:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:07:05,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:05,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:05,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:07:05,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562384530] [2020-12-23 06:07:05,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:07:05,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:05,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:07:05,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:07:05,222 INFO L87 Difference]: Start difference. First operand 212 states and 253 transitions. Second operand 45 states. [2020-12-23 06:07:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:05,423 INFO L93 Difference]: Finished difference Result 225 states and 268 transitions. [2020-12-23 06:07:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:07:05,423 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 170 [2020-12-23 06:07:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:05,424 INFO L225 Difference]: With dead ends: 225 [2020-12-23 06:07:05,424 INFO L226 Difference]: Without dead ends: 221 [2020-12-23 06:07:05,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:07:05,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-23 06:07:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 217. [2020-12-23 06:07:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-23 06:07:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 259 transitions. [2020-12-23 06:07:05,430 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 259 transitions. Word has length 170 [2020-12-23 06:07:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:05,430 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 259 transitions. [2020-12-23 06:07:05,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:07:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 259 transitions. [2020-12-23 06:07:05,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 06:07:05,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:05,432 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:05,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 06:07:05,644 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1160975879, now seen corresponding path program 42 times [2020-12-23 06:07:05,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:05,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169912592] [2020-12-23 06:07:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:06,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169912592] [2020-12-23 06:07:06,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913983819] [2020-12-23 06:07:06,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:07,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 06:07:07,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:07,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:07:07,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:07,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:07,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 06:07:07,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512902230] [2020-12-23 06:07:07,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:07:07,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:07,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:07:07,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:07:07,261 INFO L87 Difference]: Start difference. First operand 217 states and 259 transitions. Second operand 46 states. [2020-12-23 06:07:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:07,450 INFO L93 Difference]: Finished difference Result 230 states and 274 transitions. [2020-12-23 06:07:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:07:07,452 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 174 [2020-12-23 06:07:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:07,453 INFO L225 Difference]: With dead ends: 230 [2020-12-23 06:07:07,453 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 06:07:07,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:07:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 06:07:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-12-23 06:07:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-23 06:07:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 265 transitions. [2020-12-23 06:07:07,459 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 265 transitions. Word has length 174 [2020-12-23 06:07:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:07,459 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 265 transitions. [2020-12-23 06:07:07,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:07:07,460 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 265 transitions. [2020-12-23 06:07:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 06:07:07,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:07,461 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:07,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:07,674 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1942369035, now seen corresponding path program 43 times [2020-12-23 06:07:07,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:07,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966543341] [2020-12-23 06:07:07,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966543341] [2020-12-23 06:07:08,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222331371] [2020-12-23 06:07:08,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:09,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:07:09,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:09,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:09,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 06:07:09,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552328102] [2020-12-23 06:07:09,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:07:09,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:07:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:07:09,285 INFO L87 Difference]: Start difference. First operand 222 states and 265 transitions. Second operand 47 states. [2020-12-23 06:07:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:09,529 INFO L93 Difference]: Finished difference Result 235 states and 280 transitions. [2020-12-23 06:07:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:07:09,530 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 178 [2020-12-23 06:07:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:09,531 INFO L225 Difference]: With dead ends: 235 [2020-12-23 06:07:09,531 INFO L226 Difference]: Without dead ends: 231 [2020-12-23 06:07:09,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:07:09,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-12-23 06:07:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2020-12-23 06:07:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-23 06:07:09,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2020-12-23 06:07:09,537 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 178 [2020-12-23 06:07:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:09,537 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2020-12-23 06:07:09,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:07:09,538 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2020-12-23 06:07:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-23 06:07:09,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:09,539 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:09,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:09,753 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:09,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash -233874205, now seen corresponding path program 44 times [2020-12-23 06:07:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:09,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319233483] [2020-12-23 06:07:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:11,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319233483] [2020-12-23 06:07:11,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547387469] [2020-12-23 06:07:11,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:11,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:11,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:07:11,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:11,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:11,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 06:07:11,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690226253] [2020-12-23 06:07:11,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:07:11,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:11,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:07:11,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:07:11,433 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand 48 states. [2020-12-23 06:07:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:11,649 INFO L93 Difference]: Finished difference Result 240 states and 286 transitions. [2020-12-23 06:07:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:07:11,649 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 182 [2020-12-23 06:07:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:11,651 INFO L225 Difference]: With dead ends: 240 [2020-12-23 06:07:11,651 INFO L226 Difference]: Without dead ends: 236 [2020-12-23 06:07:11,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:07:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-23 06:07:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2020-12-23 06:07:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-23 06:07:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 277 transitions. [2020-12-23 06:07:11,657 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 277 transitions. Word has length 182 [2020-12-23 06:07:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:11,657 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 277 transitions. [2020-12-23 06:07:11,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:07:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 277 transitions. [2020-12-23 06:07:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 06:07:11,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:11,659 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:11,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 06:07:11,872 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:11,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1369392593, now seen corresponding path program 45 times [2020-12-23 06:07:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:11,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638923669] [2020-12-23 06:07:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:13,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638923669] [2020-12-23 06:07:13,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461855041] [2020-12-23 06:07:13,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:13,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 06:07:13,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:07:13,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:13,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:13,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 06:07:13,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947091800] [2020-12-23 06:07:13,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:07:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:07:13,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:07:13,700 INFO L87 Difference]: Start difference. First operand 232 states and 277 transitions. Second operand 49 states. [2020-12-23 06:07:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:13,931 INFO L93 Difference]: Finished difference Result 245 states and 292 transitions. [2020-12-23 06:07:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:07:13,932 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 186 [2020-12-23 06:07:13,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:13,933 INFO L225 Difference]: With dead ends: 245 [2020-12-23 06:07:13,934 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 06:07:13,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:07:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 06:07:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 237. [2020-12-23 06:07:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-23 06:07:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 283 transitions. [2020-12-23 06:07:13,939 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 283 transitions. Word has length 186 [2020-12-23 06:07:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:13,940 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 283 transitions. [2020-12-23 06:07:13,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:07:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 283 transitions. [2020-12-23 06:07:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-23 06:07:13,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:13,941 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:14,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:07:14,156 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash 605358015, now seen corresponding path program 46 times [2020-12-23 06:07:14,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:14,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261227583] [2020-12-23 06:07:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:15,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261227583] [2020-12-23 06:07:15,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655157186] [2020-12-23 06:07:15,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:15,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:15,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:15,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:07:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:15,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:15,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 06:07:15,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839520134] [2020-12-23 06:07:15,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:07:15,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:15,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:07:15,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:07:15,968 INFO L87 Difference]: Start difference. First operand 237 states and 283 transitions. Second operand 50 states. [2020-12-23 06:07:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:16,265 INFO L93 Difference]: Finished difference Result 250 states and 298 transitions. [2020-12-23 06:07:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:07:16,266 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 190 [2020-12-23 06:07:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:16,268 INFO L225 Difference]: With dead ends: 250 [2020-12-23 06:07:16,268 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 06:07:16,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:07:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 06:07:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2020-12-23 06:07:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-23 06:07:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 289 transitions. [2020-12-23 06:07:16,274 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 289 transitions. Word has length 190 [2020-12-23 06:07:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:16,274 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 289 transitions. [2020-12-23 06:07:16,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:07:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 289 transitions. [2020-12-23 06:07:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 06:07:16,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:16,276 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:16,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:07:16,489 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:16,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1625039533, now seen corresponding path program 47 times [2020-12-23 06:07:16,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:16,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233746043] [2020-12-23 06:07:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:18,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233746043] [2020-12-23 06:07:18,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813552083] [2020-12-23 06:07:18,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:18,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 06:07:18,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:18,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:07:18,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:18,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:18,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 06:07:18,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998693979] [2020-12-23 06:07:18,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:07:18,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:07:18,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:07:18,476 INFO L87 Difference]: Start difference. First operand 242 states and 289 transitions. Second operand 51 states. [2020-12-23 06:07:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:18,881 INFO L93 Difference]: Finished difference Result 255 states and 304 transitions. [2020-12-23 06:07:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:07:18,881 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 194 [2020-12-23 06:07:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:18,883 INFO L225 Difference]: With dead ends: 255 [2020-12-23 06:07:18,883 INFO L226 Difference]: Without dead ends: 251 [2020-12-23 06:07:18,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:07:18,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-23 06:07:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2020-12-23 06:07:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-23 06:07:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 295 transitions. [2020-12-23 06:07:18,890 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 295 transitions. Word has length 194 [2020-12-23 06:07:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:18,890 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 295 transitions. [2020-12-23 06:07:18,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:07:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 295 transitions. [2020-12-23 06:07:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-12-23 06:07:18,892 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:18,892 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:19,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:19,107 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:19,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1570772635, now seen corresponding path program 48 times [2020-12-23 06:07:19,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:19,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624569704] [2020-12-23 06:07:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:20,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624569704] [2020-12-23 06:07:20,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224807106] [2020-12-23 06:07:20,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:20,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-23 06:07:20,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:20,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:07:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:21,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:21,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 06:07:21,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55906320] [2020-12-23 06:07:21,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:07:21,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:07:21,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:07:21,076 INFO L87 Difference]: Start difference. First operand 247 states and 295 transitions. Second operand 52 states. [2020-12-23 06:07:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:21,385 INFO L93 Difference]: Finished difference Result 260 states and 310 transitions. [2020-12-23 06:07:21,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:07:21,386 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 198 [2020-12-23 06:07:21,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:21,387 INFO L225 Difference]: With dead ends: 260 [2020-12-23 06:07:21,387 INFO L226 Difference]: Without dead ends: 256 [2020-12-23 06:07:21,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:07:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-23 06:07:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-12-23 06:07:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-23 06:07:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 301 transitions. [2020-12-23 06:07:21,393 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 301 transitions. Word has length 198 [2020-12-23 06:07:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:21,393 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 301 transitions. [2020-12-23 06:07:21,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:07:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 301 transitions. [2020-12-23 06:07:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-23 06:07:21,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:21,395 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:21,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 06:07:21,610 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:21,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1370725495, now seen corresponding path program 49 times [2020-12-23 06:07:21,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:21,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937859438] [2020-12-23 06:07:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:23,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937859438] [2020-12-23 06:07:23,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820836541] [2020-12-23 06:07:23,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:23,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:07:23,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:23,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:23,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 06:07:23,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196993070] [2020-12-23 06:07:23,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 06:07:23,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 06:07:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:07:23,552 INFO L87 Difference]: Start difference. First operand 252 states and 301 transitions. Second operand 53 states. [2020-12-23 06:07:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:23,841 INFO L93 Difference]: Finished difference Result 265 states and 316 transitions. [2020-12-23 06:07:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:07:23,842 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 202 [2020-12-23 06:07:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:23,844 INFO L225 Difference]: With dead ends: 265 [2020-12-23 06:07:23,844 INFO L226 Difference]: Without dead ends: 261 [2020-12-23 06:07:23,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:07:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-23 06:07:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2020-12-23 06:07:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-23 06:07:23,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 307 transitions. [2020-12-23 06:07:23,852 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 307 transitions. Word has length 202 [2020-12-23 06:07:23,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:23,852 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 307 transitions. [2020-12-23 06:07:23,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 06:07:23,852 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 307 transitions. [2020-12-23 06:07:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-23 06:07:23,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:23,854 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:24,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:07:24,070 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash 84707703, now seen corresponding path program 50 times [2020-12-23 06:07:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:24,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031897695] [2020-12-23 06:07:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:25,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:25,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031897695] [2020-12-23 06:07:25,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926604790] [2020-12-23 06:07:25,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:25,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:07:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:26,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:26,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 06:07:26,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336781812] [2020-12-23 06:07:26,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:07:26,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:07:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:07:26,163 INFO L87 Difference]: Start difference. First operand 257 states and 307 transitions. Second operand 54 states. [2020-12-23 06:07:26,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:26,455 INFO L93 Difference]: Finished difference Result 270 states and 322 transitions. [2020-12-23 06:07:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:07:26,455 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 206 [2020-12-23 06:07:26,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:26,457 INFO L225 Difference]: With dead ends: 270 [2020-12-23 06:07:26,457 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 06:07:26,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:07:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 06:07:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2020-12-23 06:07:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-23 06:07:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 313 transitions. [2020-12-23 06:07:26,463 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 313 transitions. Word has length 206 [2020-12-23 06:07:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:26,464 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 313 transitions. [2020-12-23 06:07:26,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:07:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 313 transitions. [2020-12-23 06:07:26,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-23 06:07:26,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:26,465 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:26,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:26,680 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:26,680 INFO L82 PathProgramCache]: Analyzing trace with hash 306972773, now seen corresponding path program 51 times [2020-12-23 06:07:26,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:26,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113794704] [2020-12-23 06:07:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113794704] [2020-12-23 06:07:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723161292] [2020-12-23 06:07:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:28,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-23 06:07:28,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:28,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:07:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:28,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:28,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 06:07:28,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185940261] [2020-12-23 06:07:28,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:07:28,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:28,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:07:28,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:07:28,835 INFO L87 Difference]: Start difference. First operand 262 states and 313 transitions. Second operand 55 states. [2020-12-23 06:07:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:29,233 INFO L93 Difference]: Finished difference Result 275 states and 328 transitions. [2020-12-23 06:07:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:07:29,234 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 210 [2020-12-23 06:07:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:29,236 INFO L225 Difference]: With dead ends: 275 [2020-12-23 06:07:29,236 INFO L226 Difference]: Without dead ends: 271 [2020-12-23 06:07:29,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:07:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-23 06:07:29,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 267. [2020-12-23 06:07:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 06:07:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 319 transitions. [2020-12-23 06:07:29,242 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 319 transitions. Word has length 210 [2020-12-23 06:07:29,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:29,242 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 319 transitions. [2020-12-23 06:07:29,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:07:29,242 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 319 transitions. [2020-12-23 06:07:29,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-12-23 06:07:29,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:29,243 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:29,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 06:07:29,457 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:29,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1689673811, now seen corresponding path program 52 times [2020-12-23 06:07:29,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:29,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618654804] [2020-12-23 06:07:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:31,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618654804] [2020-12-23 06:07:31,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364285379] [2020-12-23 06:07:31,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:31,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:31,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:07:31,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:31,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:31,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 06:07:31,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976849827] [2020-12-23 06:07:31,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:07:31,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:31,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:07:31,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:07:31,682 INFO L87 Difference]: Start difference. First operand 267 states and 319 transitions. Second operand 56 states. [2020-12-23 06:07:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:32,062 INFO L93 Difference]: Finished difference Result 280 states and 334 transitions. [2020-12-23 06:07:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:07:32,063 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 214 [2020-12-23 06:07:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:32,065 INFO L225 Difference]: With dead ends: 280 [2020-12-23 06:07:32,065 INFO L226 Difference]: Without dead ends: 276 [2020-12-23 06:07:32,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:07:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-23 06:07:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2020-12-23 06:07:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-23 06:07:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 325 transitions. [2020-12-23 06:07:32,071 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 325 transitions. Word has length 214 [2020-12-23 06:07:32,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:32,071 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 325 transitions. [2020-12-23 06:07:32,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:07:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 325 transitions. [2020-12-23 06:07:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-23 06:07:32,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:32,073 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:32,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:32,288 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1228345665, now seen corresponding path program 53 times [2020-12-23 06:07:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:32,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578124364] [2020-12-23 06:07:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:34,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578124364] [2020-12-23 06:07:34,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050226946] [2020-12-23 06:07:34,180 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:34,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-23 06:07:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:34,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:07:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:34,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:34,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 06:07:34,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010924061] [2020-12-23 06:07:34,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:07:34,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:34,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:07:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:07:34,604 INFO L87 Difference]: Start difference. First operand 272 states and 325 transitions. Second operand 57 states. [2020-12-23 06:07:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:35,007 INFO L93 Difference]: Finished difference Result 285 states and 340 transitions. [2020-12-23 06:07:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 06:07:35,007 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 218 [2020-12-23 06:07:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:35,008 INFO L225 Difference]: With dead ends: 285 [2020-12-23 06:07:35,008 INFO L226 Difference]: Without dead ends: 281 [2020-12-23 06:07:35,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:07:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-23 06:07:35,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 277. [2020-12-23 06:07:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-23 06:07:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 331 transitions. [2020-12-23 06:07:35,014 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 331 transitions. Word has length 218 [2020-12-23 06:07:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:35,014 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 331 transitions. [2020-12-23 06:07:35,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:07:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 331 transitions. [2020-12-23 06:07:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-23 06:07:35,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:35,016 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:35,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 06:07:35,230 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1426482385, now seen corresponding path program 54 times [2020-12-23 06:07:35,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:35,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628637186] [2020-12-23 06:07:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:37,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628637186] [2020-12-23 06:07:37,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938957996] [2020-12-23 06:07:37,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:37,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 06:07:37,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:07:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:37,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:37,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 06:07:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182471578] [2020-12-23 06:07:37,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:07:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:07:37,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:07:37,706 INFO L87 Difference]: Start difference. First operand 277 states and 331 transitions. Second operand 58 states. [2020-12-23 06:07:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:38,002 INFO L93 Difference]: Finished difference Result 290 states and 346 transitions. [2020-12-23 06:07:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:07:38,003 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 222 [2020-12-23 06:07:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:38,004 INFO L225 Difference]: With dead ends: 290 [2020-12-23 06:07:38,004 INFO L226 Difference]: Without dead ends: 286 [2020-12-23 06:07:38,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:07:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-23 06:07:38,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-12-23 06:07:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-23 06:07:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 337 transitions. [2020-12-23 06:07:38,009 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 337 transitions. Word has length 222 [2020-12-23 06:07:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:38,009 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 337 transitions. [2020-12-23 06:07:38,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:07:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 337 transitions. [2020-12-23 06:07:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-23 06:07:38,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:38,011 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:38,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:07:38,226 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash -211190243, now seen corresponding path program 55 times [2020-12-23 06:07:38,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:38,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281734434] [2020-12-23 06:07:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:40,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281734434] [2020-12-23 06:07:40,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580216428] [2020-12-23 06:07:40,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:40,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:07:40,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:40,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:40,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 06:07:40,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809773272] [2020-12-23 06:07:40,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:07:40,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:07:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:07:40,747 INFO L87 Difference]: Start difference. First operand 282 states and 337 transitions. Second operand 59 states. [2020-12-23 06:07:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:41,061 INFO L93 Difference]: Finished difference Result 295 states and 352 transitions. [2020-12-23 06:07:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:07:41,061 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 226 [2020-12-23 06:07:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:41,062 INFO L225 Difference]: With dead ends: 295 [2020-12-23 06:07:41,062 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 06:07:41,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:07:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 06:07:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 287. [2020-12-23 06:07:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 06:07:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 343 transitions. [2020-12-23 06:07:41,068 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 343 transitions. Word has length 226 [2020-12-23 06:07:41,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:41,068 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 343 transitions. [2020-12-23 06:07:41,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:07:41,068 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 343 transitions. [2020-12-23 06:07:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-23 06:07:41,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:41,070 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:41,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:41,286 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash -365807093, now seen corresponding path program 56 times [2020-12-23 06:07:41,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:41,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933992606] [2020-12-23 06:07:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933992606] [2020-12-23 06:07:43,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312146144] [2020-12-23 06:07:43,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:43,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:43,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:43,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:07:43,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:43,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 06:07:43,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140341256] [2020-12-23 06:07:43,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:07:43,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:43,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:07:43,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:07:43,838 INFO L87 Difference]: Start difference. First operand 287 states and 343 transitions. Second operand 60 states. [2020-12-23 06:07:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:44,268 INFO L93 Difference]: Finished difference Result 300 states and 358 transitions. [2020-12-23 06:07:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:07:44,269 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 230 [2020-12-23 06:07:44,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:44,270 INFO L225 Difference]: With dead ends: 300 [2020-12-23 06:07:44,270 INFO L226 Difference]: Without dead ends: 296 [2020-12-23 06:07:44,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:07:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-23 06:07:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 292. [2020-12-23 06:07:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-23 06:07:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 349 transitions. [2020-12-23 06:07:44,275 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 349 transitions. Word has length 230 [2020-12-23 06:07:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:44,276 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 349 transitions. [2020-12-23 06:07:44,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:07:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 349 transitions. [2020-12-23 06:07:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-23 06:07:44,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:44,277 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:44,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 06:07:44,493 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:44,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1791013127, now seen corresponding path program 57 times [2020-12-23 06:07:44,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:44,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639911686] [2020-12-23 06:07:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:46,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639911686] [2020-12-23 06:07:46,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351371634] [2020-12-23 06:07:46,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:46,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-23 06:07:46,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:07:46,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:47,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 06:07:47,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462028130] [2020-12-23 06:07:47,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:07:47,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:47,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:07:47,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:07:47,187 INFO L87 Difference]: Start difference. First operand 292 states and 349 transitions. Second operand 61 states. [2020-12-23 06:07:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:47,568 INFO L93 Difference]: Finished difference Result 305 states and 364 transitions. [2020-12-23 06:07:47,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 06:07:47,569 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 234 [2020-12-23 06:07:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:47,570 INFO L225 Difference]: With dead ends: 305 [2020-12-23 06:07:47,570 INFO L226 Difference]: Without dead ends: 301 [2020-12-23 06:07:47,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:07:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-12-23 06:07:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 297. [2020-12-23 06:07:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-23 06:07:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 355 transitions. [2020-12-23 06:07:47,574 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 355 transitions. Word has length 234 [2020-12-23 06:07:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:47,575 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 355 transitions. [2020-12-23 06:07:47,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:07:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 355 transitions. [2020-12-23 06:07:47,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-23 06:07:47,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:47,576 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:47,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:47,791 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:47,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:47,792 INFO L82 PathProgramCache]: Analyzing trace with hash 414989543, now seen corresponding path program 58 times [2020-12-23 06:07:47,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:47,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728563437] [2020-12-23 06:07:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728563437] [2020-12-23 06:07:50,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445070259] [2020-12-23 06:07:50,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:50,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:50,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:07:50,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:50,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 06:07:50,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002965282] [2020-12-23 06:07:50,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 06:07:50,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 06:07:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:07:50,613 INFO L87 Difference]: Start difference. First operand 297 states and 355 transitions. Second operand 62 states. [2020-12-23 06:07:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:51,198 INFO L93 Difference]: Finished difference Result 310 states and 370 transitions. [2020-12-23 06:07:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:07:51,198 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 238 [2020-12-23 06:07:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:51,200 INFO L225 Difference]: With dead ends: 310 [2020-12-23 06:07:51,200 INFO L226 Difference]: Without dead ends: 306 [2020-12-23 06:07:51,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:07:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-23 06:07:51,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 302. [2020-12-23 06:07:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-23 06:07:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 361 transitions. [2020-12-23 06:07:51,205 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 361 transitions. Word has length 238 [2020-12-23 06:07:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:51,205 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 361 transitions. [2020-12-23 06:07:51,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 06:07:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 361 transitions. [2020-12-23 06:07:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-23 06:07:51,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:51,207 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:51,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 06:07:51,420 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1760263211, now seen corresponding path program 59 times [2020-12-23 06:07:51,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:51,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901690843] [2020-12-23 06:07:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:53,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901690843] [2020-12-23 06:07:53,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452853674] [2020-12-23 06:07:53,851 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:54,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-23 06:07:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:07:54,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:54,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:54,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 06:07:54,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117608273] [2020-12-23 06:07:54,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:07:54,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:54,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:07:54,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:07:54,350 INFO L87 Difference]: Start difference. First operand 302 states and 361 transitions. Second operand 63 states. [2020-12-23 06:07:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:54,752 INFO L93 Difference]: Finished difference Result 315 states and 376 transitions. [2020-12-23 06:07:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:07:54,752 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 242 [2020-12-23 06:07:54,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:54,754 INFO L225 Difference]: With dead ends: 315 [2020-12-23 06:07:54,754 INFO L226 Difference]: Without dead ends: 311 [2020-12-23 06:07:54,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:07:54,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-12-23 06:07:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 307. [2020-12-23 06:07:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-23 06:07:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 367 transitions. [2020-12-23 06:07:54,764 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 367 transitions. Word has length 242 [2020-12-23 06:07:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:54,764 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 367 transitions. [2020-12-23 06:07:54,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:07:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 367 transitions. [2020-12-23 06:07:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-23 06:07:54,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:54,766 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:54,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:07:54,980 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:54,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:54,981 INFO L82 PathProgramCache]: Analyzing trace with hash 284402627, now seen corresponding path program 60 times [2020-12-23 06:07:54,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:54,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525802500] [2020-12-23 06:07:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:57,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525802500] [2020-12-23 06:07:57,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848642289] [2020-12-23 06:07:57,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:57,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-23 06:07:57,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:07:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:57,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:57,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 06:07:57,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608381124] [2020-12-23 06:07:57,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:07:57,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:57,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:07:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:07:57,977 INFO L87 Difference]: Start difference. First operand 307 states and 367 transitions. Second operand 64 states. [2020-12-23 06:07:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:58,480 INFO L93 Difference]: Finished difference Result 320 states and 382 transitions. [2020-12-23 06:07:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:07:58,481 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 246 [2020-12-23 06:07:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:58,483 INFO L225 Difference]: With dead ends: 320 [2020-12-23 06:07:58,483 INFO L226 Difference]: Without dead ends: 316 [2020-12-23 06:07:58,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:07:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-12-23 06:07:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-12-23 06:07:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-12-23 06:07:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 373 transitions. [2020-12-23 06:07:58,493 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 373 transitions. Word has length 246 [2020-12-23 06:07:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:58,493 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 373 transitions. [2020-12-23 06:07:58,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:07:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 373 transitions. [2020-12-23 06:07:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-23 06:07:58,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:58,495 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:58,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:58,708 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:58,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1162157233, now seen corresponding path program 61 times [2020-12-23 06:07:58,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:58,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130909420] [2020-12-23 06:07:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:01,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130909420] [2020-12-23 06:08:01,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553941583] [2020-12-23 06:08:01,337 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:08:01,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:01,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:01,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-23 06:08:01,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809473500] [2020-12-23 06:08:01,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 06:08:01,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:01,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 06:08:01,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:08:01,809 INFO L87 Difference]: Start difference. First operand 312 states and 373 transitions. Second operand 65 states. [2020-12-23 06:08:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:02,201 INFO L93 Difference]: Finished difference Result 325 states and 388 transitions. [2020-12-23 06:08:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 06:08:02,201 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 250 [2020-12-23 06:08:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:02,202 INFO L225 Difference]: With dead ends: 325 [2020-12-23 06:08:02,202 INFO L226 Difference]: Without dead ends: 321 [2020-12-23 06:08:02,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:08:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-12-23 06:08:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2020-12-23 06:08:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-12-23 06:08:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 379 transitions. [2020-12-23 06:08:02,206 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 379 transitions. Word has length 250 [2020-12-23 06:08:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:02,207 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 379 transitions. [2020-12-23 06:08:02,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 06:08:02,207 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 379 transitions. [2020-12-23 06:08:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-12-23 06:08:02,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:02,208 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:02,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:02,422 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1858834785, now seen corresponding path program 62 times [2020-12-23 06:08:02,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:02,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136799252] [2020-12-23 06:08:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:05,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136799252] [2020-12-23 06:08:05,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234161958] [2020-12-23 06:08:05,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:05,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:05,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:05,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:08:05,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:05,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:05,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 06:08:05,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542765767] [2020-12-23 06:08:05,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:08:05,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:05,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:08:05,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:08:05,568 INFO L87 Difference]: Start difference. First operand 317 states and 379 transitions. Second operand 66 states. [2020-12-23 06:08:06,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:06,083 INFO L93 Difference]: Finished difference Result 330 states and 394 transitions. [2020-12-23 06:08:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:08:06,083 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 254 [2020-12-23 06:08:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:06,085 INFO L225 Difference]: With dead ends: 330 [2020-12-23 06:08:06,085 INFO L226 Difference]: Without dead ends: 326 [2020-12-23 06:08:06,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:08:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-23 06:08:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2020-12-23 06:08:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-12-23 06:08:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 385 transitions. [2020-12-23 06:08:06,089 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 385 transitions. Word has length 254 [2020-12-23 06:08:06,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:06,089 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 385 transitions. [2020-12-23 06:08:06,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:08:06,089 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 385 transitions. [2020-12-23 06:08:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-23 06:08:06,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:06,090 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:06,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:06,294 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash -802350707, now seen corresponding path program 63 times [2020-12-23 06:08:06,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:06,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318311262] [2020-12-23 06:08:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:09,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318311262] [2020-12-23 06:08:09,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507589362] [2020-12-23 06:08:09,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:09,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-23 06:08:09,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:08:09,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:09,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:09,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 06:08:09,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152551966] [2020-12-23 06:08:09,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:08:09,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:08:09,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:08:09,628 INFO L87 Difference]: Start difference. First operand 322 states and 385 transitions. Second operand 67 states. [2020-12-23 06:08:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:10,046 INFO L93 Difference]: Finished difference Result 335 states and 400 transitions. [2020-12-23 06:08:10,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:08:10,047 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 258 [2020-12-23 06:08:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:10,049 INFO L225 Difference]: With dead ends: 335 [2020-12-23 06:08:10,049 INFO L226 Difference]: Without dead ends: 331 [2020-12-23 06:08:10,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:08:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-12-23 06:08:10,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 327. [2020-12-23 06:08:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-23 06:08:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 391 transitions. [2020-12-23 06:08:10,054 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 391 transitions. Word has length 258 [2020-12-23 06:08:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:10,055 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 391 transitions. [2020-12-23 06:08:10,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:08:10,055 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 391 transitions. [2020-12-23 06:08:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-12-23 06:08:10,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:10,056 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:10,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:10,270 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:10,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1004182907, now seen corresponding path program 64 times [2020-12-23 06:08:10,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:10,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184622943] [2020-12-23 06:08:10,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:13,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184622943] [2020-12-23 06:08:13,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105476489] [2020-12-23 06:08:13,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:13,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:13,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:08:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:13,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:13,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 06:08:13,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388867132] [2020-12-23 06:08:13,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:08:13,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:13,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:08:13,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:08:13,589 INFO L87 Difference]: Start difference. First operand 327 states and 391 transitions. Second operand 68 states. [2020-12-23 06:08:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:14,138 INFO L93 Difference]: Finished difference Result 340 states and 406 transitions. [2020-12-23 06:08:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:08:14,139 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 262 [2020-12-23 06:08:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:14,140 INFO L225 Difference]: With dead ends: 340 [2020-12-23 06:08:14,140 INFO L226 Difference]: Without dead ends: 336 [2020-12-23 06:08:14,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:08:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-23 06:08:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 332. [2020-12-23 06:08:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-12-23 06:08:14,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 397 transitions. [2020-12-23 06:08:14,145 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 397 transitions. Word has length 262 [2020-12-23 06:08:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:14,145 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 397 transitions. [2020-12-23 06:08:14,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:08:14,145 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 397 transitions. [2020-12-23 06:08:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-23 06:08:14,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:14,146 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:14,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:14,354 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1277721193, now seen corresponding path program 65 times [2020-12-23 06:08:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:14,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924678916] [2020-12-23 06:08:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:17,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924678916] [2020-12-23 06:08:17,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261828412] [2020-12-23 06:08:17,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:17,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 06:08:17,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:17,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:08:17,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:17,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:17,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 06:08:17,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557233725] [2020-12-23 06:08:17,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:08:17,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:17,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:08:17,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:08:17,852 INFO L87 Difference]: Start difference. First operand 332 states and 397 transitions. Second operand 69 states. [2020-12-23 06:08:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:18,410 INFO L93 Difference]: Finished difference Result 345 states and 412 transitions. [2020-12-23 06:08:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 06:08:18,411 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 266 [2020-12-23 06:08:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:18,412 INFO L225 Difference]: With dead ends: 345 [2020-12-23 06:08:18,412 INFO L226 Difference]: Without dead ends: 341 [2020-12-23 06:08:18,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:08:18,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-12-23 06:08:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 337. [2020-12-23 06:08:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-23 06:08:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 403 transitions. [2020-12-23 06:08:18,417 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 403 transitions. Word has length 266 [2020-12-23 06:08:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:18,418 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 403 transitions. [2020-12-23 06:08:18,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:08:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 403 transitions. [2020-12-23 06:08:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-12-23 06:08:18,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:18,420 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:18,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:08:18,632 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1757269929, now seen corresponding path program 66 times [2020-12-23 06:08:18,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:18,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647012341] [2020-12-23 06:08:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:21,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647012341] [2020-12-23 06:08:21,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808430398] [2020-12-23 06:08:21,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:21,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-23 06:08:21,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:21,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:08:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:22,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:22,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 06:08:22,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616266380] [2020-12-23 06:08:22,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:08:22,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:22,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:08:22,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:08:22,195 INFO L87 Difference]: Start difference. First operand 337 states and 403 transitions. Second operand 70 states. [2020-12-23 06:08:22,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:22,943 INFO L93 Difference]: Finished difference Result 350 states and 418 transitions. [2020-12-23 06:08:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:08:22,944 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 270 [2020-12-23 06:08:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:22,945 INFO L225 Difference]: With dead ends: 350 [2020-12-23 06:08:22,945 INFO L226 Difference]: Without dead ends: 346 [2020-12-23 06:08:22,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:08:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-23 06:08:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-12-23 06:08:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-12-23 06:08:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 409 transitions. [2020-12-23 06:08:22,949 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 409 transitions. Word has length 270 [2020-12-23 06:08:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:22,950 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 409 transitions. [2020-12-23 06:08:22,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:08:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 409 transitions. [2020-12-23 06:08:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-23 06:08:22,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:22,951 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:23,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:08:23,152 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:23,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:23,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1315750075, now seen corresponding path program 67 times [2020-12-23 06:08:23,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:23,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232899925] [2020-12-23 06:08:23,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232899925] [2020-12-23 06:08:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103589293] [2020-12-23 06:08:26,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:26,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:08:26,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:26,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:26,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-23 06:08:26,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023483600] [2020-12-23 06:08:26,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 06:08:26,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:26,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 06:08:26,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:08:26,780 INFO L87 Difference]: Start difference. First operand 342 states and 409 transitions. Second operand 71 states. [2020-12-23 06:08:27,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:27,241 INFO L93 Difference]: Finished difference Result 355 states and 424 transitions. [2020-12-23 06:08:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:08:27,241 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 274 [2020-12-23 06:08:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:27,243 INFO L225 Difference]: With dead ends: 355 [2020-12-23 06:08:27,243 INFO L226 Difference]: Without dead ends: 351 [2020-12-23 06:08:27,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:08:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-23 06:08:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 347. [2020-12-23 06:08:27,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-12-23 06:08:27,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 415 transitions. [2020-12-23 06:08:27,247 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 415 transitions. Word has length 274 [2020-12-23 06:08:27,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:27,247 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 415 transitions. [2020-12-23 06:08:27,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 06:08:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 415 transitions. [2020-12-23 06:08:27,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-12-23 06:08:27,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:27,249 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:27,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:27,462 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash 231155507, now seen corresponding path program 68 times [2020-12-23 06:08:27,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:27,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273600862] [2020-12-23 06:08:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:30,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273600862] [2020-12-23 06:08:30,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990437106] [2020-12-23 06:08:30,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:30,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:30,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:30,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:08:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:31,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:31,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 06:08:31,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049586567] [2020-12-23 06:08:31,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:08:31,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:08:31,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:08:31,211 INFO L87 Difference]: Start difference. First operand 347 states and 415 transitions. Second operand 72 states. [2020-12-23 06:08:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:31,839 INFO L93 Difference]: Finished difference Result 360 states and 430 transitions. [2020-12-23 06:08:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:08:31,839 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 278 [2020-12-23 06:08:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:31,841 INFO L225 Difference]: With dead ends: 360 [2020-12-23 06:08:31,841 INFO L226 Difference]: Without dead ends: 356 [2020-12-23 06:08:31,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:08:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-12-23 06:08:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2020-12-23 06:08:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-12-23 06:08:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 421 transitions. [2020-12-23 06:08:31,845 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 421 transitions. Word has length 278 [2020-12-23 06:08:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:31,845 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 421 transitions. [2020-12-23 06:08:31,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:08:31,846 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 421 transitions. [2020-12-23 06:08:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-12-23 06:08:31,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:31,847 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:32,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 06:08:32,048 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash -590780383, now seen corresponding path program 69 times [2020-12-23 06:08:32,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:32,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788163159] [2020-12-23 06:08:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:35,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788163159] [2020-12-23 06:08:35,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056485786] [2020-12-23 06:08:35,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:35,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-23 06:08:35,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:35,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:08:35,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:35,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:35,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 06:08:35,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704524597] [2020-12-23 06:08:35,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:08:35,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:35,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:08:35,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:08:35,946 INFO L87 Difference]: Start difference. First operand 352 states and 421 transitions. Second operand 73 states. [2020-12-23 06:08:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:36,683 INFO L93 Difference]: Finished difference Result 365 states and 436 transitions. [2020-12-23 06:08:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:08:36,684 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 282 [2020-12-23 06:08:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:36,685 INFO L225 Difference]: With dead ends: 365 [2020-12-23 06:08:36,685 INFO L226 Difference]: Without dead ends: 361 [2020-12-23 06:08:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:08:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-12-23 06:08:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 357. [2020-12-23 06:08:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-23 06:08:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 427 transitions. [2020-12-23 06:08:36,689 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 427 transitions. Word has length 282 [2020-12-23 06:08:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:36,689 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 427 transitions. [2020-12-23 06:08:36,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:08:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 427 transitions. [2020-12-23 06:08:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-23 06:08:36,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:36,691 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:36,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:08:36,892 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -305823217, now seen corresponding path program 70 times [2020-12-23 06:08:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:36,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709556097] [2020-12-23 06:08:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:40,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709556097] [2020-12-23 06:08:40,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073289998] [2020-12-23 06:08:40,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:40,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:40,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:08:40,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:40,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:40,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 06:08:40,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877393230] [2020-12-23 06:08:40,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 06:08:40,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:40,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 06:08:40,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:08:40,907 INFO L87 Difference]: Start difference. First operand 357 states and 427 transitions. Second operand 74 states. [2020-12-23 06:08:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:41,632 INFO L93 Difference]: Finished difference Result 370 states and 442 transitions. [2020-12-23 06:08:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:08:41,633 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 286 [2020-12-23 06:08:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:41,634 INFO L225 Difference]: With dead ends: 370 [2020-12-23 06:08:41,634 INFO L226 Difference]: Without dead ends: 366 [2020-12-23 06:08:41,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:08:41,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-23 06:08:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2020-12-23 06:08:41,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-12-23 06:08:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 433 transitions. [2020-12-23 06:08:41,639 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 433 transitions. Word has length 286 [2020-12-23 06:08:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:41,639 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 433 transitions. [2020-12-23 06:08:41,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 06:08:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 433 transitions. [2020-12-23 06:08:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-12-23 06:08:41,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:41,640 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:41,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 06:08:41,841 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:41,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:41,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1910049539, now seen corresponding path program 71 times [2020-12-23 06:08:41,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:41,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816298730] [2020-12-23 06:08:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:45,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816298730] [2020-12-23 06:08:45,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455593223] [2020-12-23 06:08:45,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:45,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 06:08:45,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:45,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:08:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:45,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:45,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 06:08:45,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518653716] [2020-12-23 06:08:45,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 06:08:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:45,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 06:08:45,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:08:45,966 INFO L87 Difference]: Start difference. First operand 362 states and 433 transitions. Second operand 75 states. [2020-12-23 06:08:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:46,791 INFO L93 Difference]: Finished difference Result 375 states and 448 transitions. [2020-12-23 06:08:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:08:46,791 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 290 [2020-12-23 06:08:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:46,793 INFO L225 Difference]: With dead ends: 375 [2020-12-23 06:08:46,793 INFO L226 Difference]: Without dead ends: 371 [2020-12-23 06:08:46,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:08:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-12-23 06:08:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 367. [2020-12-23 06:08:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-12-23 06:08:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 439 transitions. [2020-12-23 06:08:46,797 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 439 transitions. Word has length 290 [2020-12-23 06:08:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:46,798 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 439 transitions. [2020-12-23 06:08:46,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 06:08:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 439 transitions. [2020-12-23 06:08:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-12-23 06:08:46,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:46,807 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:47,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:47,008 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1771651307, now seen corresponding path program 72 times [2020-12-23 06:08:47,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:47,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589986376] [2020-12-23 06:08:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:50,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589986376] [2020-12-23 06:08:50,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080324744] [2020-12-23 06:08:50,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:50,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-23 06:08:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:50,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:08:50,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:51,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:51,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 06:08:51,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687249552] [2020-12-23 06:08:51,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:08:51,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:51,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:08:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:08:51,261 INFO L87 Difference]: Start difference. First operand 367 states and 439 transitions. Second operand 76 states. [2020-12-23 06:08:51,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:51,977 INFO L93 Difference]: Finished difference Result 380 states and 454 transitions. [2020-12-23 06:08:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:08:51,977 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 294 [2020-12-23 06:08:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:51,979 INFO L225 Difference]: With dead ends: 380 [2020-12-23 06:08:51,979 INFO L226 Difference]: Without dead ends: 376 [2020-12-23 06:08:51,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:08:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-12-23 06:08:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2020-12-23 06:08:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-12-23 06:08:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 445 transitions. [2020-12-23 06:08:51,983 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 445 transitions. Word has length 294 [2020-12-23 06:08:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:51,984 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 445 transitions. [2020-12-23 06:08:51,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:08:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 445 transitions. [2020-12-23 06:08:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-12-23 06:08:51,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:51,985 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:52,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:52,186 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:52,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:52,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1778902489, now seen corresponding path program 73 times [2020-12-23 06:08:52,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:52,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188508014] [2020-12-23 06:08:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:55,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188508014] [2020-12-23 06:08:55,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528836688] [2020-12-23 06:08:55,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:56,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:08:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:56,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:56,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 06:08:56,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232656730] [2020-12-23 06:08:56,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 06:08:56,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:56,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 06:08:56,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:08:56,518 INFO L87 Difference]: Start difference. First operand 372 states and 445 transitions. Second operand 77 states. [2020-12-23 06:08:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:57,093 INFO L93 Difference]: Finished difference Result 385 states and 460 transitions. [2020-12-23 06:08:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 06:08:57,094 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 298 [2020-12-23 06:08:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:57,095 INFO L225 Difference]: With dead ends: 385 [2020-12-23 06:08:57,095 INFO L226 Difference]: Without dead ends: 381 [2020-12-23 06:08:57,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:08:57,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-23 06:08:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2020-12-23 06:08:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-12-23 06:08:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 451 transitions. [2020-12-23 06:08:57,100 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 451 transitions. Word has length 298 [2020-12-23 06:08:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:57,100 INFO L481 AbstractCegarLoop]: Abstraction has 377 states and 451 transitions. [2020-12-23 06:08:57,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 06:08:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 451 transitions. [2020-12-23 06:08:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-12-23 06:08:57,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:57,101 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:57,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:57,302 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:57,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:57,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1751227449, now seen corresponding path program 74 times [2020-12-23 06:08:57,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:57,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781879525] [2020-12-23 06:08:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:01,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781879525] [2020-12-23 06:09:01,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117319007] [2020-12-23 06:09:01,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:01,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:01,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:09:01,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:01,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:01,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 06:09:01,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723620409] [2020-12-23 06:09:01,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 06:09:01,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 06:09:01,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:09:01,733 INFO L87 Difference]: Start difference. First operand 377 states and 451 transitions. Second operand 78 states. [2020-12-23 06:09:02,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:02,424 INFO L93 Difference]: Finished difference Result 390 states and 466 transitions. [2020-12-23 06:09:02,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:09:02,424 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 302 [2020-12-23 06:09:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:02,426 INFO L225 Difference]: With dead ends: 390 [2020-12-23 06:09:02,426 INFO L226 Difference]: Without dead ends: 386 [2020-12-23 06:09:02,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:09:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-23 06:09:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 382. [2020-12-23 06:09:02,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-12-23 06:09:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 457 transitions. [2020-12-23 06:09:02,432 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 457 transitions. Word has length 302 [2020-12-23 06:09:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:02,432 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 457 transitions. [2020-12-23 06:09:02,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 06:09:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 457 transitions. [2020-12-23 06:09:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-23 06:09:02,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:02,434 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:02,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 06:09:02,639 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:02,640 INFO L82 PathProgramCache]: Analyzing trace with hash -121095499, now seen corresponding path program 75 times [2020-12-23 06:09:02,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:02,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500714725] [2020-12-23 06:09:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:06,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500714725] [2020-12-23 06:09:06,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71934962] [2020-12-23 06:09:06,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:06,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-23 06:09:06,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:06,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:09:06,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:07,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:07,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 06:09:07,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822520372] [2020-12-23 06:09:07,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 06:09:07,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:07,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 06:09:07,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:09:07,276 INFO L87 Difference]: Start difference. First operand 382 states and 457 transitions. Second operand 79 states. [2020-12-23 06:09:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:08,104 INFO L93 Difference]: Finished difference Result 395 states and 472 transitions. [2020-12-23 06:09:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:09:08,104 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 306 [2020-12-23 06:09:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:08,106 INFO L225 Difference]: With dead ends: 395 [2020-12-23 06:09:08,106 INFO L226 Difference]: Without dead ends: 391 [2020-12-23 06:09:08,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:09:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-12-23 06:09:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 387. [2020-12-23 06:09:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-12-23 06:09:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 463 transitions. [2020-12-23 06:09:08,110 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 463 transitions. Word has length 306 [2020-12-23 06:09:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:08,111 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 463 transitions. [2020-12-23 06:09:08,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 06:09:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 463 transitions. [2020-12-23 06:09:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-12-23 06:09:08,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:08,112 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:08,313 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1915808419, now seen corresponding path program 76 times [2020-12-23 06:09:08,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:08,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710157550] [2020-12-23 06:09:08,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:12,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710157550] [2020-12-23 06:09:12,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379022913] [2020-12-23 06:09:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:12,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:12,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:12,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:09:12,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:12,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:12,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 06:09:12,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434840980] [2020-12-23 06:09:12,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:09:12,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:12,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:09:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:09:12,984 INFO L87 Difference]: Start difference. First operand 387 states and 463 transitions. Second operand 80 states. [2020-12-23 06:09:13,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:13,768 INFO L93 Difference]: Finished difference Result 400 states and 478 transitions. [2020-12-23 06:09:13,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:09:13,769 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 310 [2020-12-23 06:09:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:13,770 INFO L225 Difference]: With dead ends: 400 [2020-12-23 06:09:13,771 INFO L226 Difference]: Without dead ends: 396 [2020-12-23 06:09:13,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:09:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-12-23 06:09:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 392. [2020-12-23 06:09:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-12-23 06:09:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 469 transitions. [2020-12-23 06:09:13,776 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 469 transitions. Word has length 310 [2020-12-23 06:09:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:13,776 INFO L481 AbstractCegarLoop]: Abstraction has 392 states and 469 transitions. [2020-12-23 06:09:13,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 06:09:13,777 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 469 transitions. [2020-12-23 06:09:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-12-23 06:09:13,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:13,778 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:13,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:13,986 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:13,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1497107567, now seen corresponding path program 77 times [2020-12-23 06:09:13,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:13,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107784801] [2020-12-23 06:09:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:18,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107784801] [2020-12-23 06:09:18,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608881767] [2020-12-23 06:09:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:18,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 06:09:18,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 06:09:18,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:18,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:18,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 06:09:18,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337249473] [2020-12-23 06:09:18,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 06:09:18,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 06:09:18,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:09:18,848 INFO L87 Difference]: Start difference. First operand 392 states and 469 transitions. Second operand 81 states. [2020-12-23 06:09:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:19,490 INFO L93 Difference]: Finished difference Result 405 states and 484 transitions. [2020-12-23 06:09:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 06:09:19,491 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 314 [2020-12-23 06:09:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:19,493 INFO L225 Difference]: With dead ends: 405 [2020-12-23 06:09:19,493 INFO L226 Difference]: Without dead ends: 401 [2020-12-23 06:09:19,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:09:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-12-23 06:09:19,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 397. [2020-12-23 06:09:19,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-12-23 06:09:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 475 transitions. [2020-12-23 06:09:19,498 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 475 transitions. Word has length 314 [2020-12-23 06:09:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:19,499 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 475 transitions. [2020-12-23 06:09:19,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 06:09:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 475 transitions. [2020-12-23 06:09:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-12-23 06:09:19,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:19,500 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:19,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 06:09:19,701 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:19,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:19,702 INFO L82 PathProgramCache]: Analyzing trace with hash -676539009, now seen corresponding path program 78 times [2020-12-23 06:09:19,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:19,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449409405] [2020-12-23 06:09:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:19,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:24,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449409405] [2020-12-23 06:09:24,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762166488] [2020-12-23 06:09:24,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:24,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-23 06:09:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:24,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 06:09:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:24,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:24,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 06:09:24,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768937344] [2020-12-23 06:09:24,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 06:09:24,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:24,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 06:09:24,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:09:24,732 INFO L87 Difference]: Start difference. First operand 397 states and 475 transitions. Second operand 82 states. [2020-12-23 06:09:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:25,697 INFO L93 Difference]: Finished difference Result 410 states and 490 transitions. [2020-12-23 06:09:25,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 06:09:25,698 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 318 [2020-12-23 06:09:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:25,700 INFO L225 Difference]: With dead ends: 410 [2020-12-23 06:09:25,700 INFO L226 Difference]: Without dead ends: 406 [2020-12-23 06:09:25,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 06:09:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-23 06:09:25,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 402. [2020-12-23 06:09:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-12-23 06:09:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 481 transitions. [2020-12-23 06:09:25,704 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 481 transitions. Word has length 318 [2020-12-23 06:09:25,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:25,705 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 481 transitions. [2020-12-23 06:09:25,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 06:09:25,705 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 481 transitions. [2020-12-23 06:09:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-12-23 06:09:25,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:25,706 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:25,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 06:09:25,907 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:25,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:25,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1000927123, now seen corresponding path program 79 times [2020-12-23 06:09:25,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:25,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237677235] [2020-12-23 06:09:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:30,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237677235] [2020-12-23 06:09:30,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765711254] [2020-12-23 06:09:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:30,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 06:09:30,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:30,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:30,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-23 06:09:30,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65411010] [2020-12-23 06:09:30,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 06:09:30,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:30,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 06:09:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:09:30,991 INFO L87 Difference]: Start difference. First operand 402 states and 481 transitions. Second operand 83 states. [2020-12-23 06:09:31,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:31,831 INFO L93 Difference]: Finished difference Result 415 states and 496 transitions. [2020-12-23 06:09:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 06:09:31,832 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 322 [2020-12-23 06:09:31,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:31,834 INFO L225 Difference]: With dead ends: 415 [2020-12-23 06:09:31,834 INFO L226 Difference]: Without dead ends: 411 [2020-12-23 06:09:31,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 06:09:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-12-23 06:09:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 407. [2020-12-23 06:09:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-12-23 06:09:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 487 transitions. [2020-12-23 06:09:31,841 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 487 transitions. Word has length 322 [2020-12-23 06:09:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:31,841 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 487 transitions. [2020-12-23 06:09:31,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 06:09:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 487 transitions. [2020-12-23 06:09:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-23 06:09:31,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:31,843 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:32,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:32,054 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1972493221, now seen corresponding path program 80 times [2020-12-23 06:09:32,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:32,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241687957] [2020-12-23 06:09:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:36,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241687957] [2020-12-23 06:09:36,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450193847] [2020-12-23 06:09:36,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:36,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:36,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:36,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 06:09:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:37,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:37,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-23 06:09:37,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918708126] [2020-12-23 06:09:37,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-23 06:09:37,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-23 06:09:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:09:37,285 INFO L87 Difference]: Start difference. First operand 407 states and 487 transitions. Second operand 84 states. [2020-12-23 06:09:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:37,982 INFO L93 Difference]: Finished difference Result 420 states and 502 transitions. [2020-12-23 06:09:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 06:09:37,982 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 326 [2020-12-23 06:09:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:37,984 INFO L225 Difference]: With dead ends: 420 [2020-12-23 06:09:37,984 INFO L226 Difference]: Without dead ends: 416 [2020-12-23 06:09:37,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 06:09:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-23 06:09:37,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 412. [2020-12-23 06:09:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-12-23 06:09:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 493 transitions. [2020-12-23 06:09:37,989 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 493 transitions. Word has length 326 [2020-12-23 06:09:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:37,989 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 493 transitions. [2020-12-23 06:09:37,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-23 06:09:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 493 transitions. [2020-12-23 06:09:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-23 06:09:37,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:37,990 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:38,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:38,196 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:38,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2049076919, now seen corresponding path program 81 times [2020-12-23 06:09:38,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:38,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123963194] [2020-12-23 06:09:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:42,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123963194] [2020-12-23 06:09:42,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081358231] [2020-12-23 06:09:42,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:43,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-23 06:09:43,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 06:09:43,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:43,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:43,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-23 06:09:43,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82681106] [2020-12-23 06:09:43,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 06:09:43,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:43,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 06:09:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:09:43,637 INFO L87 Difference]: Start difference. First operand 412 states and 493 transitions. Second operand 85 states. [2020-12-23 06:09:44,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:44,409 INFO L93 Difference]: Finished difference Result 425 states and 508 transitions. [2020-12-23 06:09:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 06:09:44,410 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 330 [2020-12-23 06:09:44,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:44,422 INFO L225 Difference]: With dead ends: 425 [2020-12-23 06:09:44,422 INFO L226 Difference]: Without dead ends: 421 [2020-12-23 06:09:44,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 06:09:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-12-23 06:09:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2020-12-23 06:09:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-23 06:09:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 499 transitions. [2020-12-23 06:09:44,427 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 499 transitions. Word has length 330 [2020-12-23 06:09:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:44,427 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 499 transitions. [2020-12-23 06:09:44,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 06:09:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 499 transitions. [2020-12-23 06:09:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-12-23 06:09:44,429 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:44,429 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:44,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:44,630 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:44,631 INFO L82 PathProgramCache]: Analyzing trace with hash 818992951, now seen corresponding path program 82 times [2020-12-23 06:09:44,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:44,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655701381] [2020-12-23 06:09:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:49,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655701381] [2020-12-23 06:09:49,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289621395] [2020-12-23 06:09:49,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:49,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:49,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:49,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 06:09:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:50,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:50,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-23 06:09:50,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759308765] [2020-12-23 06:09:50,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 06:09:50,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 06:09:50,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:09:50,143 INFO L87 Difference]: Start difference. First operand 417 states and 499 transitions. Second operand 86 states. [2020-12-23 06:09:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:51,325 INFO L93 Difference]: Finished difference Result 430 states and 514 transitions. [2020-12-23 06:09:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 06:09:51,326 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 334 [2020-12-23 06:09:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:51,327 INFO L225 Difference]: With dead ends: 430 [2020-12-23 06:09:51,327 INFO L226 Difference]: Without dead ends: 426 [2020-12-23 06:09:51,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 06:09:51,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-12-23 06:09:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 422. [2020-12-23 06:09:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-12-23 06:09:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 505 transitions. [2020-12-23 06:09:51,332 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 505 transitions. Word has length 334 [2020-12-23 06:09:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:51,332 INFO L481 AbstractCegarLoop]: Abstraction has 422 states and 505 transitions. [2020-12-23 06:09:51,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 06:09:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 505 transitions. [2020-12-23 06:09:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-12-23 06:09:51,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:51,334 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:51,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:51,535 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:51,536 INFO L82 PathProgramCache]: Analyzing trace with hash 62092837, now seen corresponding path program 83 times [2020-12-23 06:09:51,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:51,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166305253] [2020-12-23 06:09:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166305253] [2020-12-23 06:09:56,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840758467] [2020-12-23 06:09:56,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:56,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-23 06:09:56,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:56,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 06:09:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:57,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:57,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-23 06:09:57,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806844526] [2020-12-23 06:09:57,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-23 06:09:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-23 06:09:57,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:09:57,245 INFO L87 Difference]: Start difference. First operand 422 states and 505 transitions. Second operand 87 states. [2020-12-23 06:09:58,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:58,170 INFO L93 Difference]: Finished difference Result 435 states and 520 transitions. [2020-12-23 06:09:58,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 06:09:58,173 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 338 [2020-12-23 06:09:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:58,176 INFO L225 Difference]: With dead ends: 435 [2020-12-23 06:09:58,176 INFO L226 Difference]: Without dead ends: 431 [2020-12-23 06:09:58,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 06:09:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-12-23 06:09:58,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 427. [2020-12-23 06:09:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-12-23 06:09:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 511 transitions. [2020-12-23 06:09:58,183 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 511 transitions. Word has length 338 [2020-12-23 06:09:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:58,183 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 511 transitions. [2020-12-23 06:09:58,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-23 06:09:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 511 transitions. [2020-12-23 06:09:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-12-23 06:09:58,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:58,185 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:58,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:58,386 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1429270035, now seen corresponding path program 84 times [2020-12-23 06:09:58,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:58,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716326406] [2020-12-23 06:09:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:03,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716326406] [2020-12-23 06:10:03,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505523309] [2020-12-23 06:10:03,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:03,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-12-23 06:10:03,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 06:10:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:04,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:04,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-23 06:10:04,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9772860] [2020-12-23 06:10:04,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 06:10:04,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 06:10:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:10:04,491 INFO L87 Difference]: Start difference. First operand 427 states and 511 transitions. Second operand 88 states. [2020-12-23 06:10:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:05,833 INFO L93 Difference]: Finished difference Result 440 states and 526 transitions. [2020-12-23 06:10:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 06:10:05,834 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 342 [2020-12-23 06:10:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:05,836 INFO L225 Difference]: With dead ends: 440 [2020-12-23 06:10:05,836 INFO L226 Difference]: Without dead ends: 436 [2020-12-23 06:10:05,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 06:10:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-12-23 06:10:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 432. [2020-12-23 06:10:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 432 states. [2020-12-23 06:10:05,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 517 transitions. [2020-12-23 06:10:05,842 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 517 transitions. Word has length 342 [2020-12-23 06:10:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:05,843 INFO L481 AbstractCegarLoop]: Abstraction has 432 states and 517 transitions. [2020-12-23 06:10:05,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 06:10:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 517 transitions. [2020-12-23 06:10:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-12-23 06:10:05,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:05,845 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:06,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-12-23 06:10:06,046 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:06,047 INFO L82 PathProgramCache]: Analyzing trace with hash 976535297, now seen corresponding path program 85 times [2020-12-23 06:10:06,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:06,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384806265] [2020-12-23 06:10:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:11,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384806265] [2020-12-23 06:10:11,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858855947] [2020-12-23 06:10:11,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:11,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 06:10:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:12,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:12,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-12-23 06:10:12,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185895022] [2020-12-23 06:10:12,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-23 06:10:12,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:12,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-23 06:10:12,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 06:10:12,033 INFO L87 Difference]: Start difference. First operand 432 states and 517 transitions. Second operand 89 states. [2020-12-23 06:10:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:13,289 INFO L93 Difference]: Finished difference Result 445 states and 532 transitions. [2020-12-23 06:10:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-23 06:10:13,290 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 346 [2020-12-23 06:10:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:13,292 INFO L225 Difference]: With dead ends: 445 [2020-12-23 06:10:13,292 INFO L226 Difference]: Without dead ends: 441 [2020-12-23 06:10:13,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 06:10:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-12-23 06:10:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 437. [2020-12-23 06:10:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-12-23 06:10:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 523 transitions. [2020-12-23 06:10:13,298 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 523 transitions. Word has length 346 [2020-12-23 06:10:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:13,298 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 523 transitions. [2020-12-23 06:10:13,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-23 06:10:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 523 transitions. [2020-12-23 06:10:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-12-23 06:10:13,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:13,300 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:13,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:13,501 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1709861103, now seen corresponding path program 86 times [2020-12-23 06:10:13,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:13,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10450795] [2020-12-23 06:10:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:19,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10450795] [2020-12-23 06:10:19,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644976090] [2020-12-23 06:10:19,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:19,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:10:19,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:19,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 06:10:19,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:20,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:20,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-12-23 06:10:20,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580594734] [2020-12-23 06:10:20,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-23 06:10:20,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:20,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-23 06:10:20,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 06:10:20,033 INFO L87 Difference]: Start difference. First operand 437 states and 523 transitions. Second operand 90 states. [2020-12-23 06:10:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:21,458 INFO L93 Difference]: Finished difference Result 450 states and 538 transitions. [2020-12-23 06:10:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-23 06:10:21,459 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 350 [2020-12-23 06:10:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:21,460 INFO L225 Difference]: With dead ends: 450 [2020-12-23 06:10:21,460 INFO L226 Difference]: Without dead ends: 446 [2020-12-23 06:10:21,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 06:10:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-23 06:10:21,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 442. [2020-12-23 06:10:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-12-23 06:10:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 529 transitions. [2020-12-23 06:10:21,466 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 529 transitions. Word has length 350 [2020-12-23 06:10:21,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:21,466 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 529 transitions. [2020-12-23 06:10:21,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-23 06:10:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 529 transitions. [2020-12-23 06:10:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-12-23 06:10:21,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:21,467 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:21,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-12-23 06:10:21,675 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:21,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash 163408861, now seen corresponding path program 87 times [2020-12-23 06:10:21,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:21,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573672472] [2020-12-23 06:10:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat