/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/rlim_exit.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:42:06,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:42:06,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:42:06,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 03:42:06,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 03:42:06,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 03:42:06,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 03:42:06,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 03:42:06,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 03:42:06,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 03:42:06,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 03:42:06,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 03:42:06,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 03:42:06,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 03:42:06,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 03:42:06,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 03:42:06,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 03:42:06,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 03:42:06,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 03:42:06,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 03:42:06,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 03:42:06,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 03:42:06,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 03:42:06,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 03:42:06,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 03:42:06,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:42:06,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:42:06,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:42:06,393 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:42:06,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:42:06,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:42:06,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:42:06,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:42:06,444 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:42:06,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:42:06,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:42:06,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:42:06,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:42:06,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:42:06,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:42:06,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:42:06,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:42:06,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:42:06,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:42:06,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:42:06,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:42:06,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:42:06,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:42:06,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:42:06,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:42:06,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:42:06,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:42:06,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:42:06,454 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:42:06,454 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:42:06,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:42:06,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:42:06,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:42:06,906 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:42:06,906 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:42:06,907 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/rlim_exit.c [2020-12-22 03:42:06,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8523e5c0c/da66af65fc104abf85d2b1972a29c2d5/FLAG0ee9092bf [2020-12-22 03:42:07,661 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:42:07,661 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_exit.c [2020-12-22 03:42:07,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8523e5c0c/da66af65fc104abf85d2b1972a29c2d5/FLAG0ee9092bf [2020-12-22 03:42:08,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8523e5c0c/da66af65fc104abf85d2b1972a29c2d5 [2020-12-22 03:42:08,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:42:08,037 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:42:08,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:08,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:42:08,043 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:42:08,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c3b046b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08, skipping insertion in model container [2020-12-22 03:42:08,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:42:08,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:42:08,281 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] [2020-12-22 03:42:08,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:08,309 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:42:08,323 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/rlim_exit.c[446,459] [2020-12-22 03:42:08,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:42:08,344 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:42:08,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08 WrapperNode [2020-12-22 03:42:08,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:42:08,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:08,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:42:08,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:42:08,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:42:08,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:42:08,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:42:08,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:42:08,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... [2020-12-22 03:42:08,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:42:08,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:42:08,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:42:08,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:42:08,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:42:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:42:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:42:08,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:42:08,738 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:42:08,739 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 03:42:08,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:08 BoogieIcfgContainer [2020-12-22 03:42:08,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:42:08,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:42:08,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:42:08,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:42:08,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:42:08" (1/3) ... [2020-12-22 03:42:08,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f22e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:08, skipping insertion in model container [2020-12-22 03:42:08,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:42:08" (2/3) ... [2020-12-22 03:42:08,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f22e2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:42:08, skipping insertion in model container [2020-12-22 03:42:08,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:42:08" (3/3) ... [2020-12-22 03:42:08,777 INFO L111 eAbstractionObserver]: Analyzing ICFG rlim_exit.c [2020-12-22 03:42:08,810 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:42:08,821 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:42:08,850 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:42:08,879 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:42:08,879 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:42:08,879 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:42:08,879 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:42:08,879 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:42:08,880 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:42:08,880 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:42:08,880 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:42:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-12-22 03:42:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 03:42:08,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:08,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 03:42:08,904 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash 890522599, now seen corresponding path program 1 times [2020-12-22 03:42:08,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:08,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995263854] [2020-12-22 03:42:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:09,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995263854] [2020-12-22 03:42:09,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:42:09,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:42:09,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057184899] [2020-12-22 03:42:09,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:42:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:09,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:42:09,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:42:09,158 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-12-22 03:42:09,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:09,176 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-22 03:42:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:42:09,178 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 03:42:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:09,190 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:42:09,190 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:42:09,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:42:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:42:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:42:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:42:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 03:42:09,230 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2020-12-22 03:42:09,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:09,230 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 03:42:09,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:42:09,231 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 03:42:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 03:42:09,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:09,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 03:42:09,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:42:09,232 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:09,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:09,233 INFO L82 PathProgramCache]: Analyzing trace with hash 889628869, now seen corresponding path program 1 times [2020-12-22 03:42:09,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:09,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533619726] [2020-12-22 03:42:09,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:09,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533619726] [2020-12-22 03:42:09,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:42:09,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:42:09,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258387109] [2020-12-22 03:42:09,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:42:09,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:09,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:42:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:42:09,292 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-12-22 03:42:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:09,308 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-12-22 03:42:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:42:09,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 03:42:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:09,313 INFO L225 Difference]: With dead ends: 26 [2020-12-22 03:42:09,313 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 03:42:09,316 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 [2020-12-22 03:42:09,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 03:42:09,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2020-12-22 03:42:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 03:42:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-22 03:42:09,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2020-12-22 03:42:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:09,326 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-22 03:42:09,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:42:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-22 03:42:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:42:09,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:09,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:09,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:42:09,328 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash -32842122, now seen corresponding path program 1 times [2020-12-22 03:42:09,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:09,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912441353] [2020-12-22 03:42:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912441353] [2020-12-22 03:42:09,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780800817] [2020-12-22 03:42:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:42:09,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:09,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:09,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:42:09,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664344976] [2020-12-22 03:42:09,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:42:09,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:09,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:42:09,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:42:09,588 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2020-12-22 03:42:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:09,610 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-12-22 03:42:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:42:09,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 03:42:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:09,611 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:42:09,611 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 03:42:09,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:42:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 03:42:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2020-12-22 03:42:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 03:42:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-22 03:42:09,618 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2020-12-22 03:42:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:09,618 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-22 03:42:09,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:42:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-22 03:42:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 03:42:09,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:09,619 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:09,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 03:42:09,834 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:09,835 INFO L82 PathProgramCache]: Analyzing trace with hash 964759461, now seen corresponding path program 2 times [2020-12-22 03:42:09,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:09,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288584433] [2020-12-22 03:42:09,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288584433] [2020-12-22 03:42:09,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244358529] [2020-12-22 03:42:09,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:09,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:09,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:42:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:10,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:10,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:42:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817604017] [2020-12-22 03:42:10,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:42:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:10,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:42:10,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:42:10,035 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-12-22 03:42:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:10,057 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-12-22 03:42:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:42:10,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-22 03:42:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:10,059 INFO L225 Difference]: With dead ends: 42 [2020-12-22 03:42:10,059 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 03:42:10,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:42:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 03:42:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-22 03:42:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 03:42:10,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-22 03:42:10,066 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2020-12-22 03:42:10,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:10,067 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-22 03:42:10,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:42:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-22 03:42:10,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 03:42:10,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:10,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:10,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:10,282 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:10,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:10,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2033777558, now seen corresponding path program 3 times [2020-12-22 03:42:10,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:10,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878034498] [2020-12-22 03:42:10,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:10,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878034498] [2020-12-22 03:42:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593594753] [2020-12-22 03:42:10,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:10,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 03:42:10,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:10,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:42:10,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:10,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:10,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:42:10,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182588380] [2020-12-22 03:42:10,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:42:10,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:10,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:42:10,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:42:10,506 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 7 states. [2020-12-22 03:42:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:10,555 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-12-22 03:42:10,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:42:10,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-12-22 03:42:10,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:10,559 INFO L225 Difference]: With dead ends: 50 [2020-12-22 03:42:10,559 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 03:42:10,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:42:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 03:42:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2020-12-22 03:42:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 03:42:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-22 03:42:10,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 27 [2020-12-22 03:42:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:10,575 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-22 03:42:10,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:42:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-22 03:42:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 03:42:10,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:10,578 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:10,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:10,794 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:10,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:10,795 INFO L82 PathProgramCache]: Analyzing trace with hash -322048379, now seen corresponding path program 4 times [2020-12-22 03:42:10,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:10,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273284142] [2020-12-22 03:42:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:10,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273284142] [2020-12-22 03:42:10,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747122952] [2020-12-22 03:42:10,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:10,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:10,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:10,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 03:42:10,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:11,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:11,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 03:42:11,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719495516] [2020-12-22 03:42:11,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:42:11,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:42:11,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:42:11,063 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-12-22 03:42:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:11,088 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-12-22 03:42:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:42:11,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-12-22 03:42:11,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:11,090 INFO L225 Difference]: With dead ends: 58 [2020-12-22 03:42:11,090 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 03:42:11,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:42:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 03:42:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-12-22 03:42:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 03:42:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-12-22 03:42:11,096 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 34 [2020-12-22 03:42:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:11,097 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-12-22 03:42:11,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:42:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-12-22 03:42:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 03:42:11,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:11,098 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:11,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:11,312 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:11,313 INFO L82 PathProgramCache]: Analyzing trace with hash -497180490, now seen corresponding path program 5 times [2020-12-22 03:42:11,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:11,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016473403] [2020-12-22 03:42:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:11,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016473403] [2020-12-22 03:42:11,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807490159] [2020-12-22 03:42:11,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:11,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 03:42:11,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:11,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 03:42:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:11,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:11,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 03:42:11,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624347741] [2020-12-22 03:42:11,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:42:11,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:11,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:42:11,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:42:11,528 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 9 states. [2020-12-22 03:42:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:11,556 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2020-12-22 03:42:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:42:11,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-12-22 03:42:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:11,557 INFO L225 Difference]: With dead ends: 66 [2020-12-22 03:42:11,558 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 03:42:11,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:42:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 03:42:11,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2020-12-22 03:42:11,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 03:42:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-12-22 03:42:11,564 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 41 [2020-12-22 03:42:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:11,564 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-12-22 03:42:11,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:42:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-12-22 03:42:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 03:42:11,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:11,566 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:11,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 03:42:11,780 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:11,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:11,782 INFO L82 PathProgramCache]: Analyzing trace with hash -784644763, now seen corresponding path program 6 times [2020-12-22 03:42:11,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:11,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478796359] [2020-12-22 03:42:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:11,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478796359] [2020-12-22 03:42:11,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123605062] [2020-12-22 03:42:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:11,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 03:42:11,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:42:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:12,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:12,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:42:12,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340091897] [2020-12-22 03:42:12,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:42:12,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:42:12,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:42:12,065 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 10 states. [2020-12-22 03:42:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:12,096 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2020-12-22 03:42:12,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:42:12,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-12-22 03:42:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:12,098 INFO L225 Difference]: With dead ends: 74 [2020-12-22 03:42:12,098 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 03:42:12,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:42:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 03:42:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-12-22 03:42:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 03:42:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-12-22 03:42:12,105 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 48 [2020-12-22 03:42:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:12,106 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-12-22 03:42:12,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:42:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-12-22 03:42:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 03:42:12,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:12,107 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:12,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:12,321 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:12,322 INFO L82 PathProgramCache]: Analyzing trace with hash 594202070, now seen corresponding path program 7 times [2020-12-22 03:42:12,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:12,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176371125] [2020-12-22 03:42:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:12,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176371125] [2020-12-22 03:42:12,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198177142] [2020-12-22 03:42:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:12,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 03:42:12,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:12,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:12,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 03:42:12,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103470468] [2020-12-22 03:42:12,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:42:12,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:12,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:42:12,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:42:12,571 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 11 states. [2020-12-22 03:42:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:12,609 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-12-22 03:42:12,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:42:12,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-12-22 03:42:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:12,610 INFO L225 Difference]: With dead ends: 82 [2020-12-22 03:42:12,610 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 03:42:12,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:42:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 03:42:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-12-22 03:42:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 03:42:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-12-22 03:42:12,617 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 55 [2020-12-22 03:42:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:12,617 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-12-22 03:42:12,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:42:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-12-22 03:42:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 03:42:12,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:12,618 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:12,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:12,833 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:12,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:12,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1217860677, now seen corresponding path program 8 times [2020-12-22 03:42:12,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:12,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805034839] [2020-12-22 03:42:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:12,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805034839] [2020-12-22 03:42:12,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025511084] [2020-12-22 03:42:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:13,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:13,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:13,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:42:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:13,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:13,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:42:13,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140433151] [2020-12-22 03:42:13,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:42:13,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:42:13,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:42:13,184 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 12 states. [2020-12-22 03:42:13,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:13,223 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-12-22 03:42:13,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:42:13,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-12-22 03:42:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:13,225 INFO L225 Difference]: With dead ends: 90 [2020-12-22 03:42:13,225 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 03:42:13,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:42:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 03:42:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-22 03:42:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 03:42:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2020-12-22 03:42:13,247 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 62 [2020-12-22 03:42:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:13,248 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-12-22 03:42:13,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:42:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2020-12-22 03:42:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 03:42:13,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:13,250 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:13,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 03:42:13,465 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:13,466 INFO L82 PathProgramCache]: Analyzing trace with hash -690846986, now seen corresponding path program 9 times [2020-12-22 03:42:13,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:13,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127840127] [2020-12-22 03:42:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:13,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127840127] [2020-12-22 03:42:13,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536554579] [2020-12-22 03:42:13,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:13,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 03:42:13,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:13,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:42:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:13,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:13,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:42:13,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387767952] [2020-12-22 03:42:13,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:42:13,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:13,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:42:13,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:42:13,748 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand 13 states. [2020-12-22 03:42:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:13,790 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-12-22 03:42:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:42:13,790 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-12-22 03:42:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:13,791 INFO L225 Difference]: With dead ends: 98 [2020-12-22 03:42:13,791 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 03:42:13,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:42:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 03:42:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-12-22 03:42:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 03:42:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2020-12-22 03:42:13,796 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 69 [2020-12-22 03:42:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:13,797 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2020-12-22 03:42:13,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:42:13,797 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2020-12-22 03:42:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 03:42:13,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:13,798 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:14,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:14,012 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:14,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1949260581, now seen corresponding path program 10 times [2020-12-22 03:42:14,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:14,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282601406] [2020-12-22 03:42:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:14,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282601406] [2020-12-22 03:42:14,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260805024] [2020-12-22 03:42:14,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:14,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:14,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 03:42:14,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:14,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:14,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 03:42:14,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481024536] [2020-12-22 03:42:14,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 03:42:14,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:14,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 03:42:14,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:42:14,393 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 14 states. [2020-12-22 03:42:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:14,435 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-12-22 03:42:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 03:42:14,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-12-22 03:42:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:14,436 INFO L225 Difference]: With dead ends: 106 [2020-12-22 03:42:14,436 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 03:42:14,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:42:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 03:42:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-12-22 03:42:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 03:42:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2020-12-22 03:42:14,440 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 76 [2020-12-22 03:42:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:14,441 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2020-12-22 03:42:14,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 03:42:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2020-12-22 03:42:14,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 03:42:14,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:14,442 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:14,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:14,656 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:14,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1736884246, now seen corresponding path program 11 times [2020-12-22 03:42:14,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:14,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499703569] [2020-12-22 03:42:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499703569] [2020-12-22 03:42:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270780153] [2020-12-22 03:42:14,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:14,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 03:42:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 03:42:14,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:15,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:15,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 03:42:15,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606015050] [2020-12-22 03:42:15,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 03:42:15,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 03:42:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:42:15,063 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand 15 states. [2020-12-22 03:42:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:15,112 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2020-12-22 03:42:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:42:15,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-12-22 03:42:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:15,114 INFO L225 Difference]: With dead ends: 114 [2020-12-22 03:42:15,114 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 03:42:15,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 03:42:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 03:42:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-12-22 03:42:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 03:42:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2020-12-22 03:42:15,121 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 83 [2020-12-22 03:42:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:15,122 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2020-12-22 03:42:15,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 03:42:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2020-12-22 03:42:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 03:42:15,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:15,133 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:15,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 03:42:15,348 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:15,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash 349313541, now seen corresponding path program 12 times [2020-12-22 03:42:15,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:15,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789020785] [2020-12-22 03:42:15,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:15,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789020785] [2020-12-22 03:42:15,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311131724] [2020-12-22 03:42:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:15,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 03:42:15,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:15,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 03:42:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:15,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:15,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 03:42:15,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353536447] [2020-12-22 03:42:15,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:42:15,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:42:15,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:42:15,727 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand 16 states. [2020-12-22 03:42:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:15,781 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2020-12-22 03:42:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 03:42:15,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2020-12-22 03:42:15,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:15,783 INFO L225 Difference]: With dead ends: 122 [2020-12-22 03:42:15,783 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 03:42:15,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:42:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 03:42:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2020-12-22 03:42:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 03:42:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2020-12-22 03:42:15,788 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 90 [2020-12-22 03:42:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:15,789 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2020-12-22 03:42:15,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:42:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2020-12-22 03:42:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 03:42:15,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:15,790 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:16,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 03:42:16,004 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash 821658934, now seen corresponding path program 13 times [2020-12-22 03:42:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:16,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305752547] [2020-12-22 03:42:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:16,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305752547] [2020-12-22 03:42:16,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37386243] [2020-12-22 03:42:16,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:16,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 03:42:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:16,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:16,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 03:42:16,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127720502] [2020-12-22 03:42:16,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 03:42:16,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:16,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 03:42:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:42:16,372 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand 17 states. [2020-12-22 03:42:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:16,424 INFO L93 Difference]: Finished difference Result 130 states and 160 transitions. [2020-12-22 03:42:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 03:42:16,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 03:42:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:16,426 INFO L225 Difference]: With dead ends: 130 [2020-12-22 03:42:16,426 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 03:42:16,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 03:42:16,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 03:42:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2020-12-22 03:42:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 03:42:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 147 transitions. [2020-12-22 03:42:16,430 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 147 transitions. Word has length 97 [2020-12-22 03:42:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:16,431 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 147 transitions. [2020-12-22 03:42:16,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 03:42:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 147 transitions. [2020-12-22 03:42:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 03:42:16,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:16,432 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:16,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 03:42:16,647 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1791840485, now seen corresponding path program 14 times [2020-12-22 03:42:16,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:16,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489362733] [2020-12-22 03:42:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:16,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489362733] [2020-12-22 03:42:16,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524511879] [2020-12-22 03:42:16,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:16,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:16,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:16,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 03:42:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:17,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:17,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 03:42:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605548774] [2020-12-22 03:42:17,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 03:42:17,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:17,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 03:42:17,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:42:17,060 INFO L87 Difference]: Start difference. First operand 119 states and 147 transitions. Second operand 18 states. [2020-12-22 03:42:17,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:17,120 INFO L93 Difference]: Finished difference Result 138 states and 170 transitions. [2020-12-22 03:42:17,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 03:42:17,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 104 [2020-12-22 03:42:17,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:17,121 INFO L225 Difference]: With dead ends: 138 [2020-12-22 03:42:17,121 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 03:42:17,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 03:42:17,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 03:42:17,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2020-12-22 03:42:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 03:42:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 157 transitions. [2020-12-22 03:42:17,126 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 157 transitions. Word has length 104 [2020-12-22 03:42:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:17,126 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 157 transitions. [2020-12-22 03:42:17,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 03:42:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 157 transitions. [2020-12-22 03:42:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 03:42:17,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:17,128 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:17,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:17,344 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1625501098, now seen corresponding path program 15 times [2020-12-22 03:42:17,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:17,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494086353] [2020-12-22 03:42:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:17,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494086353] [2020-12-22 03:42:17,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756001215] [2020-12-22 03:42:17,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:17,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 03:42:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:17,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 03:42:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:17,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:17,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 03:42:17,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308412014] [2020-12-22 03:42:17,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 03:42:17,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 03:42:17,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:42:17,959 INFO L87 Difference]: Start difference. First operand 127 states and 157 transitions. Second operand 19 states. [2020-12-22 03:42:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:18,042 INFO L93 Difference]: Finished difference Result 146 states and 180 transitions. [2020-12-22 03:42:18,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 03:42:18,042 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2020-12-22 03:42:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:18,043 INFO L225 Difference]: With dead ends: 146 [2020-12-22 03:42:18,043 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 03:42:18,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:42:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 03:42:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2020-12-22 03:42:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-22 03:42:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2020-12-22 03:42:18,048 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 111 [2020-12-22 03:42:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:18,048 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2020-12-22 03:42:18,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 03:42:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2020-12-22 03:42:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 03:42:18,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:18,050 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:18,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 03:42:18,264 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:18,265 INFO L82 PathProgramCache]: Analyzing trace with hash 367984581, now seen corresponding path program 16 times [2020-12-22 03:42:18,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:18,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263263823] [2020-12-22 03:42:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:18,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263263823] [2020-12-22 03:42:18,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370297578] [2020-12-22 03:42:18,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:18,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:18,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:18,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 03:42:18,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:18,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:18,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 03:42:18,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045343596] [2020-12-22 03:42:18,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 03:42:18,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:18,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 03:42:18,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:42:18,723 INFO L87 Difference]: Start difference. First operand 135 states and 167 transitions. Second operand 20 states. [2020-12-22 03:42:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:18,786 INFO L93 Difference]: Finished difference Result 154 states and 190 transitions. [2020-12-22 03:42:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 03:42:18,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 118 [2020-12-22 03:42:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:18,788 INFO L225 Difference]: With dead ends: 154 [2020-12-22 03:42:18,788 INFO L226 Difference]: Without dead ends: 150 [2020-12-22 03:42:18,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:42:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-22 03:42:18,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2020-12-22 03:42:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-22 03:42:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 177 transitions. [2020-12-22 03:42:18,792 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 177 transitions. Word has length 118 [2020-12-22 03:42:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:18,793 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 177 transitions. [2020-12-22 03:42:18,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 03:42:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 177 transitions. [2020-12-22 03:42:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 03:42:18,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:18,794 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:19,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 03:42:19,006 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:19,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1315088246, now seen corresponding path program 17 times [2020-12-22 03:42:19,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665743565] [2020-12-22 03:42:19,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:19,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665743565] [2020-12-22 03:42:19,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968446453] [2020-12-22 03:42:19,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:19,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 03:42:19,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:19,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 03:42:19,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 969 backedges. 0 proven. 969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:19,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:19,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 03:42:19,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536023368] [2020-12-22 03:42:19,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 03:42:19,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:19,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 03:42:19,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:42:19,530 INFO L87 Difference]: Start difference. First operand 143 states and 177 transitions. Second operand 21 states. [2020-12-22 03:42:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:19,600 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2020-12-22 03:42:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 03:42:19,600 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-12-22 03:42:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:19,602 INFO L225 Difference]: With dead ends: 162 [2020-12-22 03:42:19,602 INFO L226 Difference]: Without dead ends: 158 [2020-12-22 03:42:19,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 03:42:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-22 03:42:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2020-12-22 03:42:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 03:42:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 187 transitions. [2020-12-22 03:42:19,607 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 187 transitions. Word has length 125 [2020-12-22 03:42:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:19,608 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 187 transitions. [2020-12-22 03:42:19,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 03:42:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 187 transitions. [2020-12-22 03:42:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 03:42:19,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:19,610 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:19,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:19,825 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:19,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:19,826 INFO L82 PathProgramCache]: Analyzing trace with hash -175823195, now seen corresponding path program 18 times [2020-12-22 03:42:19,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:19,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598596561] [2020-12-22 03:42:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:20,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598596561] [2020-12-22 03:42:20,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147935361] [2020-12-22 03:42:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:20,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 03:42:20,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 03:42:20,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:20,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:20,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 03:42:20,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225605184] [2020-12-22 03:42:20,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 03:42:20,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:20,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 03:42:20,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:42:20,359 INFO L87 Difference]: Start difference. First operand 151 states and 187 transitions. Second operand 22 states. [2020-12-22 03:42:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:20,427 INFO L93 Difference]: Finished difference Result 170 states and 210 transitions. [2020-12-22 03:42:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 03:42:20,427 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2020-12-22 03:42:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:20,429 INFO L225 Difference]: With dead ends: 170 [2020-12-22 03:42:20,429 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 03:42:20,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 03:42:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 03:42:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-12-22 03:42:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 03:42:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 197 transitions. [2020-12-22 03:42:20,434 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 197 transitions. Word has length 132 [2020-12-22 03:42:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:20,434 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 197 transitions. [2020-12-22 03:42:20,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 03:42:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 197 transitions. [2020-12-22 03:42:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 03:42:20,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:20,436 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:20,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:20,650 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:20,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash 733807766, now seen corresponding path program 19 times [2020-12-22 03:42:20,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:20,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861053302] [2020-12-22 03:42:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:20,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861053302] [2020-12-22 03:42:20,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519160096] [2020-12-22 03:42:20,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:21,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 03:42:21,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:21,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:21,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 03:42:21,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299540262] [2020-12-22 03:42:21,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 03:42:21,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:21,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 03:42:21,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:42:21,169 INFO L87 Difference]: Start difference. First operand 159 states and 197 transitions. Second operand 23 states. [2020-12-22 03:42:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:21,239 INFO L93 Difference]: Finished difference Result 178 states and 220 transitions. [2020-12-22 03:42:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 03:42:21,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-12-22 03:42:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:21,240 INFO L225 Difference]: With dead ends: 178 [2020-12-22 03:42:21,241 INFO L226 Difference]: Without dead ends: 174 [2020-12-22 03:42:21,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:42:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-22 03:42:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2020-12-22 03:42:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 03:42:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 207 transitions. [2020-12-22 03:42:21,246 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 207 transitions. Word has length 139 [2020-12-22 03:42:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:21,246 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 207 transitions. [2020-12-22 03:42:21,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 03:42:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 207 transitions. [2020-12-22 03:42:21,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 03:42:21,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:21,248 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:21,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:21,462 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash 140363141, now seen corresponding path program 20 times [2020-12-22 03:42:21,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:21,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981516587] [2020-12-22 03:42:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:21,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981516587] [2020-12-22 03:42:21,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115722847] [2020-12-22 03:42:21,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:21,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:21,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:21,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 03:42:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:22,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:22,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 03:42:22,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120874202] [2020-12-22 03:42:22,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 03:42:22,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:22,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 03:42:22,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:42:22,014 INFO L87 Difference]: Start difference. First operand 167 states and 207 transitions. Second operand 24 states. [2020-12-22 03:42:22,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:22,084 INFO L93 Difference]: Finished difference Result 186 states and 230 transitions. [2020-12-22 03:42:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 03:42:22,085 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2020-12-22 03:42:22,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:22,086 INFO L225 Difference]: With dead ends: 186 [2020-12-22 03:42:22,086 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 03:42:22,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:42:22,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 03:42:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 175. [2020-12-22 03:42:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 03:42:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 217 transitions. [2020-12-22 03:42:22,091 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 217 transitions. Word has length 146 [2020-12-22 03:42:22,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:22,092 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 217 transitions. [2020-12-22 03:42:22,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 03:42:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 217 transitions. [2020-12-22 03:42:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 03:42:22,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:22,094 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:22,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 03:42:22,307 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:22,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:22,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1801590346, now seen corresponding path program 21 times [2020-12-22 03:42:22,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:22,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031514041] [2020-12-22 03:42:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:22,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031514041] [2020-12-22 03:42:22,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731691717] [2020-12-22 03:42:22,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:22,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 03:42:22,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 03:42:22,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1491 backedges. 0 proven. 1491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:22,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:22,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 03:42:22,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152065203] [2020-12-22 03:42:22,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 03:42:22,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:22,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 03:42:22,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:42:22,967 INFO L87 Difference]: Start difference. First operand 175 states and 217 transitions. Second operand 25 states. [2020-12-22 03:42:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:23,041 INFO L93 Difference]: Finished difference Result 194 states and 240 transitions. [2020-12-22 03:42:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 03:42:23,041 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 153 [2020-12-22 03:42:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:23,042 INFO L225 Difference]: With dead ends: 194 [2020-12-22 03:42:23,042 INFO L226 Difference]: Without dead ends: 190 [2020-12-22 03:42:23,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 03:42:23,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-22 03:42:23,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 183. [2020-12-22 03:42:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-22 03:42:23,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 227 transitions. [2020-12-22 03:42:23,048 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 227 transitions. Word has length 153 [2020-12-22 03:42:23,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:23,048 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 227 transitions. [2020-12-22 03:42:23,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 03:42:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 227 transitions. [2020-12-22 03:42:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 03:42:23,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:23,050 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:23,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 03:42:23,266 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:23,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1288100965, now seen corresponding path program 22 times [2020-12-22 03:42:23,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:23,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005315956] [2020-12-22 03:42:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:23,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005315956] [2020-12-22 03:42:23,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051926291] [2020-12-22 03:42:23,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:23,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:23,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:23,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 03:42:23,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 1639 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:23,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:23,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 03:42:23,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642010777] [2020-12-22 03:42:23,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 03:42:23,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 03:42:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:42:23,904 INFO L87 Difference]: Start difference. First operand 183 states and 227 transitions. Second operand 26 states. [2020-12-22 03:42:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:23,992 INFO L93 Difference]: Finished difference Result 202 states and 250 transitions. [2020-12-22 03:42:23,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 03:42:23,993 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 160 [2020-12-22 03:42:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:23,994 INFO L225 Difference]: With dead ends: 202 [2020-12-22 03:42:23,994 INFO L226 Difference]: Without dead ends: 198 [2020-12-22 03:42:23,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 03:42:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-22 03:42:23,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2020-12-22 03:42:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 03:42:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 237 transitions. [2020-12-22 03:42:24,000 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 237 transitions. Word has length 160 [2020-12-22 03:42:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:24,000 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 237 transitions. [2020-12-22 03:42:24,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 03:42:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 237 transitions. [2020-12-22 03:42:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 03:42:24,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:24,002 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:24,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:24,216 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1995921110, now seen corresponding path program 23 times [2020-12-22 03:42:24,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:24,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584978366] [2020-12-22 03:42:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584978366] [2020-12-22 03:42:24,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840453657] [2020-12-22 03:42:24,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:24,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 03:42:24,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:24,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 03:42:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:24,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:24,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 03:42:24,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421874521] [2020-12-22 03:42:24,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 03:42:24,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 03:42:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:42:24,891 INFO L87 Difference]: Start difference. First operand 191 states and 237 transitions. Second operand 27 states. [2020-12-22 03:42:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:24,987 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2020-12-22 03:42:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 03:42:24,988 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 167 [2020-12-22 03:42:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:24,989 INFO L225 Difference]: With dead ends: 210 [2020-12-22 03:42:24,990 INFO L226 Difference]: Without dead ends: 206 [2020-12-22 03:42:24,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 03:42:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-22 03:42:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2020-12-22 03:42:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-22 03:42:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 247 transitions. [2020-12-22 03:42:24,995 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 247 transitions. Word has length 167 [2020-12-22 03:42:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:24,996 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 247 transitions. [2020-12-22 03:42:24,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 03:42:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 247 transitions. [2020-12-22 03:42:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-22 03:42:24,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:24,997 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:25,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 03:42:25,211 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:25,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1601279163, now seen corresponding path program 24 times [2020-12-22 03:42:25,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:25,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136347098] [2020-12-22 03:42:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136347098] [2020-12-22 03:42:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285547986] [2020-12-22 03:42:25,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:25,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 03:42:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:25,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 03:42:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1956 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:25,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:25,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 03:42:25,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134370822] [2020-12-22 03:42:25,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 03:42:25,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:25,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 03:42:25,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:42:25,995 INFO L87 Difference]: Start difference. First operand 199 states and 247 transitions. Second operand 28 states. [2020-12-22 03:42:26,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:26,107 INFO L93 Difference]: Finished difference Result 218 states and 270 transitions. [2020-12-22 03:42:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 03:42:26,107 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 174 [2020-12-22 03:42:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:26,109 INFO L225 Difference]: With dead ends: 218 [2020-12-22 03:42:26,109 INFO L226 Difference]: Without dead ends: 214 [2020-12-22 03:42:26,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 03:42:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-22 03:42:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2020-12-22 03:42:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 03:42:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 257 transitions. [2020-12-22 03:42:26,115 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 257 transitions. Word has length 174 [2020-12-22 03:42:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:26,115 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 257 transitions. [2020-12-22 03:42:26,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 03:42:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 257 transitions. [2020-12-22 03:42:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-22 03:42:26,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:26,117 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:26,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:26,326 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:26,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1899711478, now seen corresponding path program 25 times [2020-12-22 03:42:26,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:26,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349859205] [2020-12-22 03:42:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:26,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349859205] [2020-12-22 03:42:26,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197812339] [2020-12-22 03:42:26,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 03:42:26,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2125 backedges. 0 proven. 2125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:27,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:27,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 03:42:27,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849178981] [2020-12-22 03:42:27,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 03:42:27,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:27,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 03:42:27,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:42:27,049 INFO L87 Difference]: Start difference. First operand 207 states and 257 transitions. Second operand 29 states. [2020-12-22 03:42:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:27,156 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2020-12-22 03:42:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 03:42:27,157 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2020-12-22 03:42:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:27,158 INFO L225 Difference]: With dead ends: 226 [2020-12-22 03:42:27,158 INFO L226 Difference]: Without dead ends: 222 [2020-12-22 03:42:27,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 03:42:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-22 03:42:27,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2020-12-22 03:42:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-12-22 03:42:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 267 transitions. [2020-12-22 03:42:27,164 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 267 transitions. Word has length 181 [2020-12-22 03:42:27,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:27,164 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 267 transitions. [2020-12-22 03:42:27,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 03:42:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 267 transitions. [2020-12-22 03:42:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-22 03:42:27,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:27,166 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:27,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 03:42:27,380 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:27,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1593675227, now seen corresponding path program 26 times [2020-12-22 03:42:27,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:27,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775476652] [2020-12-22 03:42:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:27,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775476652] [2020-12-22 03:42:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721475095] [2020-12-22 03:42:27,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:27,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:27,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 03:42:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:28,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:28,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 03:42:28,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570625868] [2020-12-22 03:42:28,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 03:42:28,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:28,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 03:42:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:42:28,161 INFO L87 Difference]: Start difference. First operand 215 states and 267 transitions. Second operand 30 states. [2020-12-22 03:42:28,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:28,281 INFO L93 Difference]: Finished difference Result 234 states and 290 transitions. [2020-12-22 03:42:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 03:42:28,281 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 188 [2020-12-22 03:42:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:28,283 INFO L225 Difference]: With dead ends: 234 [2020-12-22 03:42:28,283 INFO L226 Difference]: Without dead ends: 230 [2020-12-22 03:42:28,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 03:42:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-12-22 03:42:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 223. [2020-12-22 03:42:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 03:42:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 277 transitions. [2020-12-22 03:42:28,289 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 277 transitions. Word has length 188 [2020-12-22 03:42:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:28,290 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 277 transitions. [2020-12-22 03:42:28,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 03:42:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 277 transitions. [2020-12-22 03:42:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-12-22 03:42:28,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:28,291 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:28,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 03:42:28,505 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash -228865770, now seen corresponding path program 27 times [2020-12-22 03:42:28,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:28,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956981148] [2020-12-22 03:42:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956981148] [2020-12-22 03:42:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311317955] [2020-12-22 03:42:29,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:29,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 03:42:29,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:29,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 03:42:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 2484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:29,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:29,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 03:42:29,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142746776] [2020-12-22 03:42:29,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 03:42:29,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:29,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 03:42:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:42:29,355 INFO L87 Difference]: Start difference. First operand 223 states and 277 transitions. Second operand 31 states. [2020-12-22 03:42:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:29,479 INFO L93 Difference]: Finished difference Result 242 states and 300 transitions. [2020-12-22 03:42:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 03:42:29,479 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 195 [2020-12-22 03:42:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:29,481 INFO L225 Difference]: With dead ends: 242 [2020-12-22 03:42:29,481 INFO L226 Difference]: Without dead ends: 238 [2020-12-22 03:42:29,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 03:42:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-22 03:42:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 231. [2020-12-22 03:42:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-22 03:42:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 287 transitions. [2020-12-22 03:42:29,488 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 287 transitions. Word has length 195 [2020-12-22 03:42:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:29,488 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 287 transitions. [2020-12-22 03:42:29,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 03:42:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 287 transitions. [2020-12-22 03:42:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-22 03:42:29,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:29,490 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:29,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 03:42:29,702 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:29,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1963921147, now seen corresponding path program 28 times [2020-12-22 03:42:29,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:29,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694954817] [2020-12-22 03:42:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:30,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694954817] [2020-12-22 03:42:30,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388445271] [2020-12-22 03:42:30,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:30,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:30,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:30,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 03:42:30,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2674 backedges. 0 proven. 2674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:30,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:30,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 03:42:30,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079132109] [2020-12-22 03:42:30,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 03:42:30,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:30,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 03:42:30,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:42:30,576 INFO L87 Difference]: Start difference. First operand 231 states and 287 transitions. Second operand 32 states. [2020-12-22 03:42:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:30,705 INFO L93 Difference]: Finished difference Result 250 states and 310 transitions. [2020-12-22 03:42:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 03:42:30,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 202 [2020-12-22 03:42:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:30,708 INFO L225 Difference]: With dead ends: 250 [2020-12-22 03:42:30,708 INFO L226 Difference]: Without dead ends: 246 [2020-12-22 03:42:30,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 03:42:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-22 03:42:30,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2020-12-22 03:42:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-12-22 03:42:30,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 297 transitions. [2020-12-22 03:42:30,717 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 297 transitions. Word has length 202 [2020-12-22 03:42:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:30,717 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 297 transitions. [2020-12-22 03:42:30,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 03:42:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 297 transitions. [2020-12-22 03:42:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-12-22 03:42:30,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:30,719 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:30,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:30,933 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:30,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1506463286, now seen corresponding path program 29 times [2020-12-22 03:42:30,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:30,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776741092] [2020-12-22 03:42:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2871 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:31,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776741092] [2020-12-22 03:42:31,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551610361] [2020-12-22 03:42:31,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:31,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 03:42:31,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 03:42:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2871 backedges. 0 proven. 2871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:31,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:31,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 03:42:31,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383584713] [2020-12-22 03:42:31,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 03:42:31,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:31,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 03:42:31,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:42:31,872 INFO L87 Difference]: Start difference. First operand 239 states and 297 transitions. Second operand 33 states. [2020-12-22 03:42:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:31,989 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2020-12-22 03:42:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 03:42:31,989 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 209 [2020-12-22 03:42:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:31,991 INFO L225 Difference]: With dead ends: 258 [2020-12-22 03:42:31,991 INFO L226 Difference]: Without dead ends: 254 [2020-12-22 03:42:31,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 03:42:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-22 03:42:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 247. [2020-12-22 03:42:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-22 03:42:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 307 transitions. [2020-12-22 03:42:31,998 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 307 transitions. Word has length 209 [2020-12-22 03:42:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:31,998 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 307 transitions. [2020-12-22 03:42:31,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 03:42:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 307 transitions. [2020-12-22 03:42:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 03:42:32,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:32,000 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:32,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 03:42:32,215 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash 447211493, now seen corresponding path program 30 times [2020-12-22 03:42:32,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:32,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783640589] [2020-12-22 03:42:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3075 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:32,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783640589] [2020-12-22 03:42:32,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466206506] [2020-12-22 03:42:32,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:33,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 03:42:33,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 03:42:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3075 backedges. 0 proven. 3075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:33,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:33,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 03:42:33,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099007776] [2020-12-22 03:42:33,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 03:42:33,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:33,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 03:42:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:42:33,289 INFO L87 Difference]: Start difference. First operand 247 states and 307 transitions. Second operand 34 states. [2020-12-22 03:42:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:33,420 INFO L93 Difference]: Finished difference Result 266 states and 330 transitions. [2020-12-22 03:42:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 03:42:33,421 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 216 [2020-12-22 03:42:33,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:33,423 INFO L225 Difference]: With dead ends: 266 [2020-12-22 03:42:33,423 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 03:42:33,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 03:42:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 03:42:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2020-12-22 03:42:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-22 03:42:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 317 transitions. [2020-12-22 03:42:33,430 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 317 transitions. Word has length 216 [2020-12-22 03:42:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:33,430 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 317 transitions. [2020-12-22 03:42:33,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 03:42:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 317 transitions. [2020-12-22 03:42:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-12-22 03:42:33,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:33,432 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:33,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:33,646 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash 393894742, now seen corresponding path program 31 times [2020-12-22 03:42:33,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:33,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162546546] [2020-12-22 03:42:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:34,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162546546] [2020-12-22 03:42:34,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929625267] [2020-12-22 03:42:34,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 03:42:34,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3286 backedges. 0 proven. 3286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:34,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:34,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 03:42:34,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328776214] [2020-12-22 03:42:34,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 03:42:34,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:34,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 03:42:34,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:42:34,554 INFO L87 Difference]: Start difference. First operand 255 states and 317 transitions. Second operand 35 states. [2020-12-22 03:42:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:34,676 INFO L93 Difference]: Finished difference Result 274 states and 340 transitions. [2020-12-22 03:42:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 03:42:34,677 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 223 [2020-12-22 03:42:34,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:34,679 INFO L225 Difference]: With dead ends: 274 [2020-12-22 03:42:34,679 INFO L226 Difference]: Without dead ends: 270 [2020-12-22 03:42:34,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:42:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-22 03:42:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2020-12-22 03:42:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-22 03:42:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 327 transitions. [2020-12-22 03:42:34,686 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 327 transitions. Word has length 223 [2020-12-22 03:42:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:34,687 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 327 transitions. [2020-12-22 03:42:34,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 03:42:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 327 transitions. [2020-12-22 03:42:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-22 03:42:34,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:34,688 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:34,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 03:42:34,902 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:34,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1811240645, now seen corresponding path program 32 times [2020-12-22 03:42:34,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:34,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603186889] [2020-12-22 03:42:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3504 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603186889] [2020-12-22 03:42:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945993311] [2020-12-22 03:42:35,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:35,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:35,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 03:42:35,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3504 backedges. 0 proven. 3504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:35,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:35,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 03:42:35,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9323285] [2020-12-22 03:42:35,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 03:42:35,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:35,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 03:42:35,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:42:35,915 INFO L87 Difference]: Start difference. First operand 263 states and 327 transitions. Second operand 36 states. [2020-12-22 03:42:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:36,069 INFO L93 Difference]: Finished difference Result 282 states and 350 transitions. [2020-12-22 03:42:36,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 03:42:36,069 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 230 [2020-12-22 03:42:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:36,071 INFO L225 Difference]: With dead ends: 282 [2020-12-22 03:42:36,071 INFO L226 Difference]: Without dead ends: 278 [2020-12-22 03:42:36,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 03:42:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-22 03:42:36,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2020-12-22 03:42:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-22 03:42:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 337 transitions. [2020-12-22 03:42:36,078 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 337 transitions. Word has length 230 [2020-12-22 03:42:36,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:36,079 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 337 transitions. [2020-12-22 03:42:36,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 03:42:36,079 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 337 transitions. [2020-12-22 03:42:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-12-22 03:42:36,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:36,080 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:36,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 03:42:36,295 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:36,296 INFO L82 PathProgramCache]: Analyzing trace with hash -874745738, now seen corresponding path program 33 times [2020-12-22 03:42:36,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:36,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384845739] [2020-12-22 03:42:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:36,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384845739] [2020-12-22 03:42:36,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873756863] [2020-12-22 03:42:36,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:37,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 03:42:37,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:37,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 03:42:37,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3729 backedges. 0 proven. 3729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:37,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:37,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 03:42:37,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966567458] [2020-12-22 03:42:37,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 03:42:37,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:37,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 03:42:37,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:42:37,387 INFO L87 Difference]: Start difference. First operand 271 states and 337 transitions. Second operand 37 states. [2020-12-22 03:42:37,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:37,543 INFO L93 Difference]: Finished difference Result 290 states and 360 transitions. [2020-12-22 03:42:37,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 03:42:37,543 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 237 [2020-12-22 03:42:37,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:37,545 INFO L225 Difference]: With dead ends: 290 [2020-12-22 03:42:37,546 INFO L226 Difference]: Without dead ends: 286 [2020-12-22 03:42:37,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 03:42:37,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-22 03:42:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2020-12-22 03:42:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-22 03:42:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 347 transitions. [2020-12-22 03:42:37,553 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 347 transitions. Word has length 237 [2020-12-22 03:42:37,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:37,553 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 347 transitions. [2020-12-22 03:42:37,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 03:42:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 347 transitions. [2020-12-22 03:42:37,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-22 03:42:37,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:37,555 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:37,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 03:42:37,771 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash -634962523, now seen corresponding path program 34 times [2020-12-22 03:42:37,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:37,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438755243] [2020-12-22 03:42:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438755243] [2020-12-22 03:42:38,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341634993] [2020-12-22 03:42:38,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:38,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:38,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:38,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 03:42:38,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 0 proven. 3961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:38,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:38,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 03:42:38,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323751827] [2020-12-22 03:42:38,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 03:42:38,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:38,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 03:42:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:42:38,889 INFO L87 Difference]: Start difference. First operand 279 states and 347 transitions. Second operand 38 states. [2020-12-22 03:42:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:39,013 INFO L93 Difference]: Finished difference Result 298 states and 370 transitions. [2020-12-22 03:42:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 03:42:39,013 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 244 [2020-12-22 03:42:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:39,017 INFO L225 Difference]: With dead ends: 298 [2020-12-22 03:42:39,017 INFO L226 Difference]: Without dead ends: 294 [2020-12-22 03:42:39,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 03:42:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-22 03:42:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2020-12-22 03:42:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-22 03:42:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 357 transitions. [2020-12-22 03:42:39,024 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 357 transitions. Word has length 244 [2020-12-22 03:42:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:39,025 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 357 transitions. [2020-12-22 03:42:39,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 03:42:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 357 transitions. [2020-12-22 03:42:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 03:42:39,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:39,027 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:39,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 03:42:39,239 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:39,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1742933398, now seen corresponding path program 35 times [2020-12-22 03:42:39,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:39,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460015771] [2020-12-22 03:42:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:40,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460015771] [2020-12-22 03:42:40,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578752944] [2020-12-22 03:42:40,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:40,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 03:42:40,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:40,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 03:42:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4200 backedges. 0 proven. 4200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:40,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:40,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 03:42:40,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278973458] [2020-12-22 03:42:40,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 03:42:40,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 03:42:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:42:40,486 INFO L87 Difference]: Start difference. First operand 287 states and 357 transitions. Second operand 39 states. [2020-12-22 03:42:40,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:40,655 INFO L93 Difference]: Finished difference Result 306 states and 380 transitions. [2020-12-22 03:42:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 03:42:40,655 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 251 [2020-12-22 03:42:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:40,657 INFO L225 Difference]: With dead ends: 306 [2020-12-22 03:42:40,657 INFO L226 Difference]: Without dead ends: 302 [2020-12-22 03:42:40,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 03:42:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-12-22 03:42:40,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2020-12-22 03:42:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-22 03:42:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 367 transitions. [2020-12-22 03:42:40,664 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 367 transitions. Word has length 251 [2020-12-22 03:42:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:40,665 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 367 transitions. [2020-12-22 03:42:40,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 03:42:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 367 transitions. [2020-12-22 03:42:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-22 03:42:40,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:40,666 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:40,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 03:42:40,880 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:40,881 INFO L82 PathProgramCache]: Analyzing trace with hash -536109947, now seen corresponding path program 36 times [2020-12-22 03:42:40,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:40,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213534980] [2020-12-22 03:42:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:41,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213534980] [2020-12-22 03:42:41,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961645085] [2020-12-22 03:42:41,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:41,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 03:42:41,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:41,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 03:42:41,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 4446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:42,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:42,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 03:42:42,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462575705] [2020-12-22 03:42:42,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 03:42:42,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:42,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 03:42:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:42:42,141 INFO L87 Difference]: Start difference. First operand 295 states and 367 transitions. Second operand 40 states. [2020-12-22 03:42:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:42,335 INFO L93 Difference]: Finished difference Result 314 states and 390 transitions. [2020-12-22 03:42:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 03:42:42,335 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 258 [2020-12-22 03:42:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:42,337 INFO L225 Difference]: With dead ends: 314 [2020-12-22 03:42:42,338 INFO L226 Difference]: Without dead ends: 310 [2020-12-22 03:42:42,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 03:42:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-22 03:42:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 303. [2020-12-22 03:42:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-12-22 03:42:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 377 transitions. [2020-12-22 03:42:42,345 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 377 transitions. Word has length 258 [2020-12-22 03:42:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:42,345 INFO L481 AbstractCegarLoop]: Abstraction has 303 states and 377 transitions. [2020-12-22 03:42:42,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 03:42:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 377 transitions. [2020-12-22 03:42:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-12-22 03:42:42,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:42,348 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:42,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 03:42:42,561 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1291858614, now seen corresponding path program 37 times [2020-12-22 03:42:42,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:42,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190267227] [2020-12-22 03:42:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4699 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190267227] [2020-12-22 03:42:43,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647256937] [2020-12-22 03:42:43,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 03:42:43,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4699 backedges. 0 proven. 4699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:43,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:43,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 03:42:43,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078544586] [2020-12-22 03:42:43,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 03:42:43,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:43,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 03:42:43,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:42:43,800 INFO L87 Difference]: Start difference. First operand 303 states and 377 transitions. Second operand 41 states. [2020-12-22 03:42:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:44,042 INFO L93 Difference]: Finished difference Result 322 states and 400 transitions. [2020-12-22 03:42:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 03:42:44,042 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 265 [2020-12-22 03:42:44,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:44,045 INFO L225 Difference]: With dead ends: 322 [2020-12-22 03:42:44,045 INFO L226 Difference]: Without dead ends: 318 [2020-12-22 03:42:44,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 03:42:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-22 03:42:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2020-12-22 03:42:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-12-22 03:42:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 387 transitions. [2020-12-22 03:42:44,052 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 387 transitions. Word has length 265 [2020-12-22 03:42:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:44,053 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 387 transitions. [2020-12-22 03:42:44,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 03:42:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 387 transitions. [2020-12-22 03:42:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-12-22 03:42:44,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:44,055 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:44,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 03:42:44,268 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:44,269 INFO L82 PathProgramCache]: Analyzing trace with hash -135236763, now seen corresponding path program 38 times [2020-12-22 03:42:44,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:44,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816360605] [2020-12-22 03:42:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816360605] [2020-12-22 03:42:45,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820744026] [2020-12-22 03:42:45,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:45,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 03:42:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 0 proven. 4959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:45,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:45,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 03:42:45,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785670678] [2020-12-22 03:42:45,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 03:42:45,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:45,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 03:42:45,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:42:45,546 INFO L87 Difference]: Start difference. First operand 311 states and 387 transitions. Second operand 42 states. [2020-12-22 03:42:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:45,807 INFO L93 Difference]: Finished difference Result 330 states and 410 transitions. [2020-12-22 03:42:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 03:42:45,808 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 272 [2020-12-22 03:42:45,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:45,810 INFO L225 Difference]: With dead ends: 330 [2020-12-22 03:42:45,810 INFO L226 Difference]: Without dead ends: 326 [2020-12-22 03:42:45,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:42:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-12-22 03:42:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 319. [2020-12-22 03:42:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-22 03:42:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 397 transitions. [2020-12-22 03:42:45,817 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 397 transitions. Word has length 272 [2020-12-22 03:42:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:45,818 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 397 transitions. [2020-12-22 03:42:45,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 03:42:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 397 transitions. [2020-12-22 03:42:45,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-12-22 03:42:45,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:45,820 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:46,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 03:42:46,035 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1831198678, now seen corresponding path program 39 times [2020-12-22 03:42:46,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:46,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936383228] [2020-12-22 03:42:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:46,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936383228] [2020-12-22 03:42:46,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719418782] [2020-12-22 03:42:46,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:47,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 03:42:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 03:42:47,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:47,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:47,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 03:42:47,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940626655] [2020-12-22 03:42:47,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 03:42:47,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:47,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 03:42:47,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:42:47,561 INFO L87 Difference]: Start difference. First operand 319 states and 397 transitions. Second operand 43 states. [2020-12-22 03:42:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:47,775 INFO L93 Difference]: Finished difference Result 338 states and 420 transitions. [2020-12-22 03:42:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 03:42:47,776 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 279 [2020-12-22 03:42:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:47,778 INFO L225 Difference]: With dead ends: 338 [2020-12-22 03:42:47,778 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 03:42:47,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 03:42:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 03:42:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2020-12-22 03:42:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 03:42:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 407 transitions. [2020-12-22 03:42:47,785 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 407 transitions. Word has length 279 [2020-12-22 03:42:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:47,786 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 407 transitions. [2020-12-22 03:42:47,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 03:42:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 407 transitions. [2020-12-22 03:42:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-22 03:42:47,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:47,788 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:48,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:48,002 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:48,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2074329669, now seen corresponding path program 40 times [2020-12-22 03:42:48,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:48,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926893003] [2020-12-22 03:42:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5500 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:48,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926893003] [2020-12-22 03:42:48,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495106686] [2020-12-22 03:42:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:49,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:42:49,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:49,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 03:42:49,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5500 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:49,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:49,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 03:42:49,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468722450] [2020-12-22 03:42:49,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 03:42:49,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 03:42:49,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:42:49,409 INFO L87 Difference]: Start difference. First operand 327 states and 407 transitions. Second operand 44 states. [2020-12-22 03:42:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:49,622 INFO L93 Difference]: Finished difference Result 346 states and 430 transitions. [2020-12-22 03:42:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 03:42:49,623 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 286 [2020-12-22 03:42:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:49,626 INFO L225 Difference]: With dead ends: 346 [2020-12-22 03:42:49,626 INFO L226 Difference]: Without dead ends: 342 [2020-12-22 03:42:49,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 03:42:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-22 03:42:49,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2020-12-22 03:42:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2020-12-22 03:42:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 417 transitions. [2020-12-22 03:42:49,634 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 417 transitions. Word has length 286 [2020-12-22 03:42:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:49,635 INFO L481 AbstractCegarLoop]: Abstraction has 335 states and 417 transitions. [2020-12-22 03:42:49,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 03:42:49,635 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 417 transitions. [2020-12-22 03:42:49,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-12-22 03:42:49,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:49,637 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:49,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:49,851 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:49,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:49,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1791366390, now seen corresponding path program 41 times [2020-12-22 03:42:49,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:49,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76191357] [2020-12-22 03:42:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76191357] [2020-12-22 03:42:50,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431363833] [2020-12-22 03:42:50,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:51,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 03:42:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 03:42:51,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 0 proven. 5781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:51,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:51,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 03:42:51,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106115533] [2020-12-22 03:42:51,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 03:42:51,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:51,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 03:42:51,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:42:51,442 INFO L87 Difference]: Start difference. First operand 335 states and 417 transitions. Second operand 45 states. [2020-12-22 03:42:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:51,618 INFO L93 Difference]: Finished difference Result 354 states and 440 transitions. [2020-12-22 03:42:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 03:42:51,619 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 293 [2020-12-22 03:42:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:51,621 INFO L225 Difference]: With dead ends: 354 [2020-12-22 03:42:51,621 INFO L226 Difference]: Without dead ends: 350 [2020-12-22 03:42:51,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 03:42:51,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-12-22 03:42:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 343. [2020-12-22 03:42:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-12-22 03:42:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 427 transitions. [2020-12-22 03:42:51,629 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 427 transitions. Word has length 293 [2020-12-22 03:42:51,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:51,630 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 427 transitions. [2020-12-22 03:42:51,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 03:42:51,630 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 427 transitions. [2020-12-22 03:42:51,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-12-22 03:42:51,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:51,632 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:51,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 03:42:51,847 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:51,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:51,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2072803035, now seen corresponding path program 42 times [2020-12-22 03:42:51,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:51,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609727922] [2020-12-22 03:42:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6069 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:52,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609727922] [2020-12-22 03:42:52,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020618600] [2020-12-22 03:42:52,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:53,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 03:42:53,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:53,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 03:42:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6069 backedges. 0 proven. 6069 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:53,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:53,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 03:42:53,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269922907] [2020-12-22 03:42:53,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 03:42:53,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 03:42:53,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:42:53,486 INFO L87 Difference]: Start difference. First operand 343 states and 427 transitions. Second operand 46 states. [2020-12-22 03:42:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:53,730 INFO L93 Difference]: Finished difference Result 362 states and 450 transitions. [2020-12-22 03:42:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 03:42:53,730 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 300 [2020-12-22 03:42:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:53,733 INFO L225 Difference]: With dead ends: 362 [2020-12-22 03:42:53,733 INFO L226 Difference]: Without dead ends: 358 [2020-12-22 03:42:53,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 03:42:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-12-22 03:42:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 351. [2020-12-22 03:42:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-12-22 03:42:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 437 transitions. [2020-12-22 03:42:53,742 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 437 transitions. Word has length 300 [2020-12-22 03:42:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:53,742 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 437 transitions. [2020-12-22 03:42:53,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 03:42:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 437 transitions. [2020-12-22 03:42:53,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-12-22 03:42:53,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:53,744 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:53,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:53,957 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:53,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1194143210, now seen corresponding path program 43 times [2020-12-22 03:42:53,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:53,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097934101] [2020-12-22 03:42:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6364 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:55,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097934101] [2020-12-22 03:42:55,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939615920] [2020-12-22 03:42:55,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:55,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 03:42:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6364 backedges. 0 proven. 6364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:55,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:55,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 03:42:55,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112094680] [2020-12-22 03:42:55,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 03:42:55,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:55,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 03:42:55,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:42:55,538 INFO L87 Difference]: Start difference. First operand 351 states and 437 transitions. Second operand 47 states. [2020-12-22 03:42:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:55,748 INFO L93 Difference]: Finished difference Result 370 states and 460 transitions. [2020-12-22 03:42:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 03:42:55,748 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 307 [2020-12-22 03:42:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:55,751 INFO L225 Difference]: With dead ends: 370 [2020-12-22 03:42:55,751 INFO L226 Difference]: Without dead ends: 366 [2020-12-22 03:42:55,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 03:42:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-12-22 03:42:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2020-12-22 03:42:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-12-22 03:42:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 447 transitions. [2020-12-22 03:42:55,759 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 447 transitions. Word has length 307 [2020-12-22 03:42:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:55,759 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 447 transitions. [2020-12-22 03:42:55,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 03:42:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 447 transitions. [2020-12-22 03:42:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-12-22 03:42:55,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:55,761 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:55,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:42:55,974 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:55,975 INFO L82 PathProgramCache]: Analyzing trace with hash -886192123, now seen corresponding path program 44 times [2020-12-22 03:42:55,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:55,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198038937] [2020-12-22 03:42:55,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6666 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:57,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198038937] [2020-12-22 03:42:57,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051402793] [2020-12-22 03:42:57,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:57,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:42:57,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:57,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 03:42:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:42:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6666 backedges. 0 proven. 6666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:57,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:42:57,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 03:42:57,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105650610] [2020-12-22 03:42:57,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 03:42:57,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:42:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 03:42:57,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:42:57,660 INFO L87 Difference]: Start difference. First operand 359 states and 447 transitions. Second operand 48 states. [2020-12-22 03:42:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:42:57,912 INFO L93 Difference]: Finished difference Result 378 states and 470 transitions. [2020-12-22 03:42:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 03:42:57,912 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 314 [2020-12-22 03:42:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:42:57,913 INFO L225 Difference]: With dead ends: 378 [2020-12-22 03:42:57,914 INFO L226 Difference]: Without dead ends: 374 [2020-12-22 03:42:57,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 03:42:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-12-22 03:42:57,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 367. [2020-12-22 03:42:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-12-22 03:42:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 457 transitions. [2020-12-22 03:42:57,921 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 457 transitions. Word has length 314 [2020-12-22 03:42:57,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:42:57,922 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 457 transitions. [2020-12-22 03:42:57,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 03:42:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 457 transitions. [2020-12-22 03:42:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-12-22 03:42:57,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:42:57,924 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2020-12-22 03:42:58,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 03:42:58,139 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:42:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:42:58,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1161947338, now seen corresponding path program 45 times [2020-12-22 03:42:58,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:42:58,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355264898] [2020-12-22 03:42:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:42:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:42:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6975 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:42:59,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355264898] [2020-12-22 03:42:59,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399959477] [2020-12-22 03:42:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:42:59,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 03:42:59,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:42:59,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 03:42:59,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6975 backedges. 0 proven. 6975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:00,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:00,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 03:43:00,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277796819] [2020-12-22 03:43:00,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 03:43:00,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:00,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 03:43:00,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:43:00,036 INFO L87 Difference]: Start difference. First operand 367 states and 457 transitions. Second operand 49 states. [2020-12-22 03:43:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:00,252 INFO L93 Difference]: Finished difference Result 386 states and 480 transitions. [2020-12-22 03:43:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 03:43:00,253 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 321 [2020-12-22 03:43:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:00,255 INFO L225 Difference]: With dead ends: 386 [2020-12-22 03:43:00,255 INFO L226 Difference]: Without dead ends: 382 [2020-12-22 03:43:00,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 03:43:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-12-22 03:43:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2020-12-22 03:43:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-12-22 03:43:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 467 transitions. [2020-12-22 03:43:00,262 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 467 transitions. Word has length 321 [2020-12-22 03:43:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:00,263 INFO L481 AbstractCegarLoop]: Abstraction has 375 states and 467 transitions. [2020-12-22 03:43:00,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 03:43:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 467 transitions. [2020-12-22 03:43:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-12-22 03:43:00,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:00,265 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:00,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 03:43:00,481 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:00,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2011136283, now seen corresponding path program 46 times [2020-12-22 03:43:00,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:00,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192536081] [2020-12-22 03:43:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:01,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192536081] [2020-12-22 03:43:01,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995051448] [2020-12-22 03:43:01,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:01,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:01,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:01,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 03:43:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7291 backedges. 0 proven. 7291 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:02,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:02,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 03:43:02,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907898508] [2020-12-22 03:43:02,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 03:43:02,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:02,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 03:43:02,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:43:02,211 INFO L87 Difference]: Start difference. First operand 375 states and 467 transitions. Second operand 50 states. [2020-12-22 03:43:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:02,459 INFO L93 Difference]: Finished difference Result 394 states and 490 transitions. [2020-12-22 03:43:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 03:43:02,460 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 328 [2020-12-22 03:43:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:02,461 INFO L225 Difference]: With dead ends: 394 [2020-12-22 03:43:02,461 INFO L226 Difference]: Without dead ends: 390 [2020-12-22 03:43:02,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 03:43:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-22 03:43:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 383. [2020-12-22 03:43:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-12-22 03:43:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 477 transitions. [2020-12-22 03:43:02,469 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 477 transitions. Word has length 328 [2020-12-22 03:43:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:02,470 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 477 transitions. [2020-12-22 03:43:02,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 03:43:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 477 transitions. [2020-12-22 03:43:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-12-22 03:43:02,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:02,472 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:02,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 03:43:02,688 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:02,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -461773738, now seen corresponding path program 47 times [2020-12-22 03:43:02,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:02,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500637733] [2020-12-22 03:43:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:04,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500637733] [2020-12-22 03:43:04,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656962888] [2020-12-22 03:43:04,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:04,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 03:43:04,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:04,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 03:43:04,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7614 backedges. 0 proven. 7614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:04,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:04,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-22 03:43:04,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919104056] [2020-12-22 03:43:04,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 03:43:04,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:04,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 03:43:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:43:04,666 INFO L87 Difference]: Start difference. First operand 383 states and 477 transitions. Second operand 51 states. [2020-12-22 03:43:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:04,970 INFO L93 Difference]: Finished difference Result 402 states and 500 transitions. [2020-12-22 03:43:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 03:43:04,970 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 335 [2020-12-22 03:43:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:04,972 INFO L225 Difference]: With dead ends: 402 [2020-12-22 03:43:04,972 INFO L226 Difference]: Without dead ends: 398 [2020-12-22 03:43:04,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 03:43:04,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-12-22 03:43:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 391. [2020-12-22 03:43:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2020-12-22 03:43:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 487 transitions. [2020-12-22 03:43:04,983 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 487 transitions. Word has length 335 [2020-12-22 03:43:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:04,984 INFO L481 AbstractCegarLoop]: Abstraction has 391 states and 487 transitions. [2020-12-22 03:43:04,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 03:43:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 487 transitions. [2020-12-22 03:43:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-12-22 03:43:04,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:04,986 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:05,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:05,201 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:05,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1394191813, now seen corresponding path program 48 times [2020-12-22 03:43:05,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:05,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63140585] [2020-12-22 03:43:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 7944 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:06,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63140585] [2020-12-22 03:43:06,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62610153] [2020-12-22 03:43:06,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:06,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 03:43:06,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 03:43:06,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7944 backedges. 0 proven. 7944 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:07,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:07,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-22 03:43:07,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555442206] [2020-12-22 03:43:07,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 03:43:07,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:07,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 03:43:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:43:07,196 INFO L87 Difference]: Start difference. First operand 391 states and 487 transitions. Second operand 52 states. [2020-12-22 03:43:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:07,527 INFO L93 Difference]: Finished difference Result 410 states and 510 transitions. [2020-12-22 03:43:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 03:43:07,527 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 342 [2020-12-22 03:43:07,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:07,529 INFO L225 Difference]: With dead ends: 410 [2020-12-22 03:43:07,529 INFO L226 Difference]: Without dead ends: 406 [2020-12-22 03:43:07,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 03:43:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2020-12-22 03:43:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 399. [2020-12-22 03:43:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-12-22 03:43:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 497 transitions. [2020-12-22 03:43:07,536 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 497 transitions. Word has length 342 [2020-12-22 03:43:07,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:07,537 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 497 transitions. [2020-12-22 03:43:07,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 03:43:07,537 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 497 transitions. [2020-12-22 03:43:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-12-22 03:43:07,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:07,539 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:07,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 03:43:07,755 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash -629655178, now seen corresponding path program 49 times [2020-12-22 03:43:07,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:07,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215021313] [2020-12-22 03:43:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:09,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215021313] [2020-12-22 03:43:09,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643025028] [2020-12-22 03:43:09,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:09,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 03:43:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:09,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:09,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-22 03:43:09,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031070795] [2020-12-22 03:43:09,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 03:43:09,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:09,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 03:43:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:43:09,722 INFO L87 Difference]: Start difference. First operand 399 states and 497 transitions. Second operand 53 states. [2020-12-22 03:43:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:10,063 INFO L93 Difference]: Finished difference Result 418 states and 520 transitions. [2020-12-22 03:43:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 03:43:10,064 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 349 [2020-12-22 03:43:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:10,066 INFO L225 Difference]: With dead ends: 418 [2020-12-22 03:43:10,066 INFO L226 Difference]: Without dead ends: 414 [2020-12-22 03:43:10,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 03:43:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2020-12-22 03:43:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 407. [2020-12-22 03:43:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-12-22 03:43:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 507 transitions. [2020-12-22 03:43:10,073 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 507 transitions. Word has length 349 [2020-12-22 03:43:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:10,073 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 507 transitions. [2020-12-22 03:43:10,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 03:43:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 507 transitions. [2020-12-22 03:43:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-12-22 03:43:10,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:10,076 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:10,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:10,290 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 57103525, now seen corresponding path program 50 times [2020-12-22 03:43:10,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:10,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867923044] [2020-12-22 03:43:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8625 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867923044] [2020-12-22 03:43:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816205210] [2020-12-22 03:43:11,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:12,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:12,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 03:43:12,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8625 backedges. 0 proven. 8625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:12,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:12,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-22 03:43:12,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259993308] [2020-12-22 03:43:12,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 03:43:12,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 03:43:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:43:12,340 INFO L87 Difference]: Start difference. First operand 407 states and 507 transitions. Second operand 54 states. [2020-12-22 03:43:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:12,611 INFO L93 Difference]: Finished difference Result 426 states and 530 transitions. [2020-12-22 03:43:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 03:43:12,611 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 356 [2020-12-22 03:43:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:12,613 INFO L225 Difference]: With dead ends: 426 [2020-12-22 03:43:12,613 INFO L226 Difference]: Without dead ends: 422 [2020-12-22 03:43:12,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 03:43:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-12-22 03:43:12,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 415. [2020-12-22 03:43:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-12-22 03:43:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 517 transitions. [2020-12-22 03:43:12,621 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 517 transitions. Word has length 356 [2020-12-22 03:43:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:12,621 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 517 transitions. [2020-12-22 03:43:12,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 03:43:12,622 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 517 transitions. [2020-12-22 03:43:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-12-22 03:43:12,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:12,624 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:12,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:12,838 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1851058538, now seen corresponding path program 51 times [2020-12-22 03:43:12,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:12,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885498027] [2020-12-22 03:43:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8976 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:14,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885498027] [2020-12-22 03:43:14,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695683997] [2020-12-22 03:43:14,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:14,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-22 03:43:14,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:14,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 03:43:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8976 backedges. 0 proven. 8976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:15,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:15,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-22 03:43:15,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770471599] [2020-12-22 03:43:15,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 03:43:15,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 03:43:15,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:43:15,133 INFO L87 Difference]: Start difference. First operand 415 states and 517 transitions. Second operand 55 states. [2020-12-22 03:43:15,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:15,461 INFO L93 Difference]: Finished difference Result 434 states and 540 transitions. [2020-12-22 03:43:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 03:43:15,461 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 363 [2020-12-22 03:43:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:15,463 INFO L225 Difference]: With dead ends: 434 [2020-12-22 03:43:15,463 INFO L226 Difference]: Without dead ends: 430 [2020-12-22 03:43:15,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 03:43:15,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2020-12-22 03:43:15,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 423. [2020-12-22 03:43:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-12-22 03:43:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 527 transitions. [2020-12-22 03:43:15,471 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 527 transitions. Word has length 363 [2020-12-22 03:43:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:15,471 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 527 transitions. [2020-12-22 03:43:15,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 03:43:15,472 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 527 transitions. [2020-12-22 03:43:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-12-22 03:43:15,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:15,474 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:15,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 03:43:15,688 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1881705595, now seen corresponding path program 52 times [2020-12-22 03:43:15,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:15,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022945845] [2020-12-22 03:43:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9334 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:17,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022945845] [2020-12-22 03:43:17,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721027899] [2020-12-22 03:43:17,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:17,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:17,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 03:43:17,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9334 backedges. 0 proven. 9334 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:17,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:17,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-22 03:43:17,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623850082] [2020-12-22 03:43:17,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 03:43:17,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 03:43:17,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:43:17,903 INFO L87 Difference]: Start difference. First operand 423 states and 527 transitions. Second operand 56 states. [2020-12-22 03:43:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:18,199 INFO L93 Difference]: Finished difference Result 442 states and 550 transitions. [2020-12-22 03:43:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 03:43:18,199 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 370 [2020-12-22 03:43:18,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:18,201 INFO L225 Difference]: With dead ends: 442 [2020-12-22 03:43:18,201 INFO L226 Difference]: Without dead ends: 438 [2020-12-22 03:43:18,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 03:43:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-12-22 03:43:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 431. [2020-12-22 03:43:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 431 states. [2020-12-22 03:43:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 537 transitions. [2020-12-22 03:43:18,208 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 537 transitions. Word has length 370 [2020-12-22 03:43:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:18,208 INFO L481 AbstractCegarLoop]: Abstraction has 431 states and 537 transitions. [2020-12-22 03:43:18,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 03:43:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 537 transitions. [2020-12-22 03:43:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-12-22 03:43:18,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:18,211 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:18,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:18,426 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:18,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:18,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1870953398, now seen corresponding path program 53 times [2020-12-22 03:43:18,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:18,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214282467] [2020-12-22 03:43:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9699 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214282467] [2020-12-22 03:43:20,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530106319] [2020-12-22 03:43:20,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:20,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-22 03:43:20,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 03:43:20,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9699 backedges. 0 proven. 9699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:20,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:20,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-22 03:43:20,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079818753] [2020-12-22 03:43:20,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 03:43:20,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:20,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 03:43:20,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:43:20,812 INFO L87 Difference]: Start difference. First operand 431 states and 537 transitions. Second operand 57 states. [2020-12-22 03:43:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:21,157 INFO L93 Difference]: Finished difference Result 450 states and 560 transitions. [2020-12-22 03:43:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 03:43:21,157 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 377 [2020-12-22 03:43:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:21,159 INFO L225 Difference]: With dead ends: 450 [2020-12-22 03:43:21,159 INFO L226 Difference]: Without dead ends: 446 [2020-12-22 03:43:21,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 03:43:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-22 03:43:21,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 439. [2020-12-22 03:43:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-12-22 03:43:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 547 transitions. [2020-12-22 03:43:21,166 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 547 transitions. Word has length 377 [2020-12-22 03:43:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:21,166 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 547 transitions. [2020-12-22 03:43:21,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 03:43:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 547 transitions. [2020-12-22 03:43:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-12-22 03:43:21,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:21,169 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:21,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 03:43:21,383 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:21,384 INFO L82 PathProgramCache]: Analyzing trace with hash -289928603, now seen corresponding path program 54 times [2020-12-22 03:43:21,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:21,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038949342] [2020-12-22 03:43:21,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10071 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:23,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038949342] [2020-12-22 03:43:23,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770930011] [2020-12-22 03:43:23,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:23,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-22 03:43:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 03:43:23,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10071 backedges. 0 proven. 10071 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:23,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:23,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-22 03:43:23,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074635093] [2020-12-22 03:43:23,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 03:43:23,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:23,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 03:43:23,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:43:23,858 INFO L87 Difference]: Start difference. First operand 439 states and 547 transitions. Second operand 58 states. [2020-12-22 03:43:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:24,165 INFO L93 Difference]: Finished difference Result 458 states and 570 transitions. [2020-12-22 03:43:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 03:43:24,166 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 384 [2020-12-22 03:43:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:24,168 INFO L225 Difference]: With dead ends: 458 [2020-12-22 03:43:24,168 INFO L226 Difference]: Without dead ends: 454 [2020-12-22 03:43:24,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 03:43:24,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-12-22 03:43:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 447. [2020-12-22 03:43:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-12-22 03:43:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 557 transitions. [2020-12-22 03:43:24,175 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 557 transitions. Word has length 384 [2020-12-22 03:43:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:24,175 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 557 transitions. [2020-12-22 03:43:24,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 03:43:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 557 transitions. [2020-12-22 03:43:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-12-22 03:43:24,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:24,178 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:24,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 03:43:24,392 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:24,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1777756374, now seen corresponding path program 55 times [2020-12-22 03:43:24,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:24,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389578483] [2020-12-22 03:43:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:24,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:26,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389578483] [2020-12-22 03:43:26,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702483180] [2020-12-22 03:43:26,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 03:43:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 0 proven. 10450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:26,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:26,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-22 03:43:26,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577404368] [2020-12-22 03:43:26,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 03:43:26,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:26,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 03:43:26,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:43:26,861 INFO L87 Difference]: Start difference. First operand 447 states and 557 transitions. Second operand 59 states. [2020-12-22 03:43:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:27,317 INFO L93 Difference]: Finished difference Result 466 states and 580 transitions. [2020-12-22 03:43:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 03:43:27,318 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 391 [2020-12-22 03:43:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:27,319 INFO L225 Difference]: With dead ends: 466 [2020-12-22 03:43:27,319 INFO L226 Difference]: Without dead ends: 462 [2020-12-22 03:43:27,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 03:43:27,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2020-12-22 03:43:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 455. [2020-12-22 03:43:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-12-22 03:43:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 567 transitions. [2020-12-22 03:43:27,325 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 567 transitions. Word has length 391 [2020-12-22 03:43:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:27,326 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 567 transitions. [2020-12-22 03:43:27,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 03:43:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 567 transitions. [2020-12-22 03:43:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2020-12-22 03:43:27,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:27,328 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:27,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:27,544 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash -170452667, now seen corresponding path program 56 times [2020-12-22 03:43:27,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:27,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8102138] [2020-12-22 03:43:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10836 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:29,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8102138] [2020-12-22 03:43:29,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771017126] [2020-12-22 03:43:29,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:29,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:29,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 03:43:29,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10836 backedges. 0 proven. 10836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:30,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:30,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-22 03:43:30,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070750869] [2020-12-22 03:43:30,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 03:43:30,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:30,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 03:43:30,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:43:30,029 INFO L87 Difference]: Start difference. First operand 455 states and 567 transitions. Second operand 60 states. [2020-12-22 03:43:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:30,331 INFO L93 Difference]: Finished difference Result 474 states and 590 transitions. [2020-12-22 03:43:30,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 03:43:30,331 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 398 [2020-12-22 03:43:30,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:30,333 INFO L225 Difference]: With dead ends: 474 [2020-12-22 03:43:30,333 INFO L226 Difference]: Without dead ends: 470 [2020-12-22 03:43:30,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 03:43:30,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-12-22 03:43:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 463. [2020-12-22 03:43:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2020-12-22 03:43:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 577 transitions. [2020-12-22 03:43:30,340 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 577 transitions. Word has length 398 [2020-12-22 03:43:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:30,340 INFO L481 AbstractCegarLoop]: Abstraction has 463 states and 577 transitions. [2020-12-22 03:43:30,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 03:43:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 577 transitions. [2020-12-22 03:43:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-12-22 03:43:30,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:30,343 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:30,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 03:43:30,552 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash 661839350, now seen corresponding path program 57 times [2020-12-22 03:43:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:30,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292335993] [2020-12-22 03:43:30,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:32,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292335993] [2020-12-22 03:43:32,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757877900] [2020-12-22 03:43:32,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:32,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-22 03:43:32,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 03:43:32,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 0 proven. 11229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:33,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:33,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-22 03:43:33,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894411835] [2020-12-22 03:43:33,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 03:43:33,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:33,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 03:43:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:43:33,258 INFO L87 Difference]: Start difference. First operand 463 states and 577 transitions. Second operand 61 states. [2020-12-22 03:43:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:33,570 INFO L93 Difference]: Finished difference Result 482 states and 600 transitions. [2020-12-22 03:43:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 03:43:33,570 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 405 [2020-12-22 03:43:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:33,572 INFO L225 Difference]: With dead ends: 482 [2020-12-22 03:43:33,572 INFO L226 Difference]: Without dead ends: 478 [2020-12-22 03:43:33,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 03:43:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-12-22 03:43:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 471. [2020-12-22 03:43:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-12-22 03:43:33,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 587 transitions. [2020-12-22 03:43:33,577 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 587 transitions. Word has length 405 [2020-12-22 03:43:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:33,577 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 587 transitions. [2020-12-22 03:43:33,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 03:43:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 587 transitions. [2020-12-22 03:43:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-12-22 03:43:33,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:33,579 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:33,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:33,783 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:33,784 INFO L82 PathProgramCache]: Analyzing trace with hash 981639205, now seen corresponding path program 58 times [2020-12-22 03:43:33,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:33,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16182225] [2020-12-22 03:43:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11629 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16182225] [2020-12-22 03:43:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196319198] [2020-12-22 03:43:35,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:36,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:36,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:36,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 03:43:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11629 backedges. 0 proven. 11629 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:36,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:36,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-22 03:43:36,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337345965] [2020-12-22 03:43:36,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 03:43:36,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:36,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 03:43:36,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:43:36,507 INFO L87 Difference]: Start difference. First operand 471 states and 587 transitions. Second operand 62 states. [2020-12-22 03:43:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:37,170 INFO L93 Difference]: Finished difference Result 490 states and 610 transitions. [2020-12-22 03:43:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 03:43:37,171 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 412 [2020-12-22 03:43:37,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:37,172 INFO L225 Difference]: With dead ends: 490 [2020-12-22 03:43:37,172 INFO L226 Difference]: Without dead ends: 486 [2020-12-22 03:43:37,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 03:43:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2020-12-22 03:43:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 479. [2020-12-22 03:43:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-12-22 03:43:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 597 transitions. [2020-12-22 03:43:37,181 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 597 transitions. Word has length 412 [2020-12-22 03:43:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:37,181 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 597 transitions. [2020-12-22 03:43:37,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 03:43:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 597 transitions. [2020-12-22 03:43:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-12-22 03:43:37,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:37,184 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:37,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 03:43:37,398 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:37,398 INFO L82 PathProgramCache]: Analyzing trace with hash 518773526, now seen corresponding path program 59 times [2020-12-22 03:43:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:37,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817451072] [2020-12-22 03:43:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12036 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:39,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817451072] [2020-12-22 03:43:39,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163033818] [2020-12-22 03:43:39,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:39,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-22 03:43:39,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:39,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1339 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 03:43:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12036 backedges. 0 proven. 12036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:40,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:40,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-22 03:43:40,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639127175] [2020-12-22 03:43:40,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 03:43:40,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:40,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 03:43:40,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:43:40,311 INFO L87 Difference]: Start difference. First operand 479 states and 597 transitions. Second operand 63 states. [2020-12-22 03:43:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:40,654 INFO L93 Difference]: Finished difference Result 498 states and 620 transitions. [2020-12-22 03:43:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 03:43:40,655 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 419 [2020-12-22 03:43:40,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:40,657 INFO L225 Difference]: With dead ends: 498 [2020-12-22 03:43:40,657 INFO L226 Difference]: Without dead ends: 494 [2020-12-22 03:43:40,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 03:43:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-12-22 03:43:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 487. [2020-12-22 03:43:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-12-22 03:43:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 607 transitions. [2020-12-22 03:43:40,663 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 607 transitions. Word has length 419 [2020-12-22 03:43:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:40,663 INFO L481 AbstractCegarLoop]: Abstraction has 487 states and 607 transitions. [2020-12-22 03:43:40,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 03:43:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 607 transitions. [2020-12-22 03:43:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-12-22 03:43:40,665 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:40,665 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:40,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:40,866 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:40,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash -242704635, now seen corresponding path program 60 times [2020-12-22 03:43:40,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:40,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902637718] [2020-12-22 03:43:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12450 backedges. 0 proven. 12450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:43,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902637718] [2020-12-22 03:43:43,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176579493] [2020-12-22 03:43:43,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:43,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-22 03:43:43,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:43,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 03:43:43,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12450 backedges. 0 proven. 12450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:43,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:43,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-22 03:43:43,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227559119] [2020-12-22 03:43:43,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 03:43:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 03:43:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:43:43,953 INFO L87 Difference]: Start difference. First operand 487 states and 607 transitions. Second operand 64 states. [2020-12-22 03:43:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:44,362 INFO L93 Difference]: Finished difference Result 506 states and 630 transitions. [2020-12-22 03:43:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 03:43:44,363 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 426 [2020-12-22 03:43:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:44,365 INFO L225 Difference]: With dead ends: 506 [2020-12-22 03:43:44,365 INFO L226 Difference]: Without dead ends: 502 [2020-12-22 03:43:44,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 03:43:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-12-22 03:43:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2020-12-22 03:43:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-12-22 03:43:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 617 transitions. [2020-12-22 03:43:44,371 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 617 transitions. Word has length 426 [2020-12-22 03:43:44,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:44,372 INFO L481 AbstractCegarLoop]: Abstraction has 495 states and 617 transitions. [2020-12-22 03:43:44,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 03:43:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 617 transitions. [2020-12-22 03:43:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-12-22 03:43:44,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:44,375 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:44,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-12-22 03:43:44,590 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:44,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:44,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1210884042, now seen corresponding path program 61 times [2020-12-22 03:43:44,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:44,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403076051] [2020-12-22 03:43:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12871 backedges. 0 proven. 12871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:46,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403076051] [2020-12-22 03:43:46,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626770345] [2020-12-22 03:43:46,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 03:43:47,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12871 backedges. 0 proven. 12871 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:47,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:47,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-22 03:43:47,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042469805] [2020-12-22 03:43:47,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 03:43:47,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 03:43:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:43:47,514 INFO L87 Difference]: Start difference. First operand 495 states and 617 transitions. Second operand 65 states. [2020-12-22 03:43:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:47,939 INFO L93 Difference]: Finished difference Result 514 states and 640 transitions. [2020-12-22 03:43:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 03:43:47,939 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 433 [2020-12-22 03:43:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:47,941 INFO L225 Difference]: With dead ends: 514 [2020-12-22 03:43:47,941 INFO L226 Difference]: Without dead ends: 510 [2020-12-22 03:43:47,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 03:43:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-12-22 03:43:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 503. [2020-12-22 03:43:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 503 states. [2020-12-22 03:43:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 627 transitions. [2020-12-22 03:43:47,948 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 627 transitions. Word has length 433 [2020-12-22 03:43:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:47,948 INFO L481 AbstractCegarLoop]: Abstraction has 503 states and 627 transitions. [2020-12-22 03:43:47,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 03:43:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 627 transitions. [2020-12-22 03:43:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-12-22 03:43:47,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:47,951 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:48,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:48,165 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:48,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:48,165 INFO L82 PathProgramCache]: Analyzing trace with hash -818473499, now seen corresponding path program 62 times [2020-12-22 03:43:48,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:48,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334932566] [2020-12-22 03:43:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13299 backedges. 0 proven. 13299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334932566] [2020-12-22 03:43:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698757354] [2020-12-22 03:43:50,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:50,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:43:50,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:50,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 03:43:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13299 backedges. 0 proven. 13299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:51,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:51,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-22 03:43:51,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174482345] [2020-12-22 03:43:51,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 03:43:51,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:51,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 03:43:51,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:43:51,180 INFO L87 Difference]: Start difference. First operand 503 states and 627 transitions. Second operand 66 states. [2020-12-22 03:43:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:51,737 INFO L93 Difference]: Finished difference Result 522 states and 650 transitions. [2020-12-22 03:43:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 03:43:51,737 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 440 [2020-12-22 03:43:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:51,740 INFO L225 Difference]: With dead ends: 522 [2020-12-22 03:43:51,740 INFO L226 Difference]: Without dead ends: 518 [2020-12-22 03:43:51,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 03:43:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-12-22 03:43:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 511. [2020-12-22 03:43:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-12-22 03:43:51,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 637 transitions. [2020-12-22 03:43:51,748 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 637 transitions. Word has length 440 [2020-12-22 03:43:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:51,749 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 637 transitions. [2020-12-22 03:43:51,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 03:43:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 637 transitions. [2020-12-22 03:43:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-12-22 03:43:51,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:51,752 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:51,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-22 03:43:51,968 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:51,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1780182358, now seen corresponding path program 63 times [2020-12-22 03:43:51,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:51,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508207498] [2020-12-22 03:43:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:54,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508207498] [2020-12-22 03:43:54,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330055192] [2020-12-22 03:43:54,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:54,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-22 03:43:54,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:54,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 03:43:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13734 backedges. 0 proven. 13734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:55,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:55,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-22 03:43:55,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863201696] [2020-12-22 03:43:55,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 03:43:55,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 03:43:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:43:55,246 INFO L87 Difference]: Start difference. First operand 511 states and 637 transitions. Second operand 67 states. [2020-12-22 03:43:55,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:55,782 INFO L93 Difference]: Finished difference Result 530 states and 660 transitions. [2020-12-22 03:43:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 03:43:55,782 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 447 [2020-12-22 03:43:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:55,784 INFO L225 Difference]: With dead ends: 530 [2020-12-22 03:43:55,784 INFO L226 Difference]: Without dead ends: 526 [2020-12-22 03:43:55,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 03:43:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-12-22 03:43:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 519. [2020-12-22 03:43:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-12-22 03:43:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 647 transitions. [2020-12-22 03:43:55,792 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 647 transitions. Word has length 447 [2020-12-22 03:43:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:55,792 INFO L481 AbstractCegarLoop]: Abstraction has 519 states and 647 transitions. [2020-12-22 03:43:55,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 03:43:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 647 transitions. [2020-12-22 03:43:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-12-22 03:43:55,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:55,795 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2020-12-22 03:43:56,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:43:56,009 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:43:56,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:43:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash -413399867, now seen corresponding path program 64 times [2020-12-22 03:43:56,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:43:56,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587314981] [2020-12-22 03:43:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:43:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:43:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14176 backedges. 0 proven. 14176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:58,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587314981] [2020-12-22 03:43:58,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802225580] [2020-12-22 03:43:58,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:43:58,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:43:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:43:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-22 03:43:58,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:43:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14176 backedges. 0 proven. 14176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:43:59,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:43:59,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-22 03:43:59,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802698279] [2020-12-22 03:43:59,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 03:43:59,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:43:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 03:43:59,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:43:59,264 INFO L87 Difference]: Start difference. First operand 519 states and 647 transitions. Second operand 68 states. [2020-12-22 03:43:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:43:59,934 INFO L93 Difference]: Finished difference Result 538 states and 670 transitions. [2020-12-22 03:43:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 03:43:59,934 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 454 [2020-12-22 03:43:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:43:59,936 INFO L225 Difference]: With dead ends: 538 [2020-12-22 03:43:59,936 INFO L226 Difference]: Without dead ends: 534 [2020-12-22 03:43:59,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 03:43:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-12-22 03:43:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 527. [2020-12-22 03:43:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-12-22 03:43:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 657 transitions. [2020-12-22 03:43:59,942 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 657 transitions. Word has length 454 [2020-12-22 03:43:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:43:59,942 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 657 transitions. [2020-12-22 03:43:59,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 03:43:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 657 transitions. [2020-12-22 03:43:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-12-22 03:43:59,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:43:59,946 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:00,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 03:44:00,160 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:00,161 INFO L82 PathProgramCache]: Analyzing trace with hash -566885770, now seen corresponding path program 65 times [2020-12-22 03:44:00,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:00,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360466214] [2020-12-22 03:44:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14625 backedges. 0 proven. 14625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:02,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360466214] [2020-12-22 03:44:02,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549806644] [2020-12-22 03:44:02,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:03,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-22 03:44:03,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:03,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 03:44:03,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14625 backedges. 0 proven. 14625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:03,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:03,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-22 03:44:03,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915649946] [2020-12-22 03:44:03,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 03:44:03,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:03,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 03:44:03,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:44:03,757 INFO L87 Difference]: Start difference. First operand 527 states and 657 transitions. Second operand 69 states. [2020-12-22 03:44:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:04,658 INFO L93 Difference]: Finished difference Result 546 states and 680 transitions. [2020-12-22 03:44:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 03:44:04,659 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 461 [2020-12-22 03:44:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:04,661 INFO L225 Difference]: With dead ends: 546 [2020-12-22 03:44:04,661 INFO L226 Difference]: Without dead ends: 542 [2020-12-22 03:44:04,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 03:44:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-12-22 03:44:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 535. [2020-12-22 03:44:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-12-22 03:44:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 667 transitions. [2020-12-22 03:44:04,675 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 667 transitions. Word has length 461 [2020-12-22 03:44:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:04,675 INFO L481 AbstractCegarLoop]: Abstraction has 535 states and 667 transitions. [2020-12-22 03:44:04,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 03:44:04,675 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 667 transitions. [2020-12-22 03:44:04,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-12-22 03:44:04,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:04,678 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:04,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 03:44:04,887 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1924830299, now seen corresponding path program 66 times [2020-12-22 03:44:04,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:04,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194178125] [2020-12-22 03:44:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15081 backedges. 0 proven. 15081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:07,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194178125] [2020-12-22 03:44:07,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196250716] [2020-12-22 03:44:07,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:08,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-22 03:44:08,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:08,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1493 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-22 03:44:08,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 15081 backedges. 0 proven. 15081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:08,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:08,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-22 03:44:08,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2215784] [2020-12-22 03:44:08,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 03:44:08,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:08,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 03:44:08,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:44:08,526 INFO L87 Difference]: Start difference. First operand 535 states and 667 transitions. Second operand 70 states. [2020-12-22 03:44:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:09,014 INFO L93 Difference]: Finished difference Result 554 states and 690 transitions. [2020-12-22 03:44:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-22 03:44:09,014 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 468 [2020-12-22 03:44:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:09,016 INFO L225 Difference]: With dead ends: 554 [2020-12-22 03:44:09,016 INFO L226 Difference]: Without dead ends: 550 [2020-12-22 03:44:09,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 03:44:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2020-12-22 03:44:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 543. [2020-12-22 03:44:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-12-22 03:44:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 677 transitions. [2020-12-22 03:44:09,022 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 677 transitions. Word has length 468 [2020-12-22 03:44:09,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:09,022 INFO L481 AbstractCegarLoop]: Abstraction has 543 states and 677 transitions. [2020-12-22 03:44:09,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 03:44:09,022 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 677 transitions. [2020-12-22 03:44:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-12-22 03:44:09,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:09,024 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:09,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-22 03:44:09,225 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash 219488150, now seen corresponding path program 67 times [2020-12-22 03:44:09,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:09,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316756625] [2020-12-22 03:44:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15544 backedges. 0 proven. 15544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:11,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316756625] [2020-12-22 03:44:11,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833688528] [2020-12-22 03:44:11,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 03:44:12,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15544 backedges. 0 proven. 15544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:12,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:12,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-22 03:44:12,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015960941] [2020-12-22 03:44:12,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 03:44:12,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:12,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 03:44:12,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:44:12,660 INFO L87 Difference]: Start difference. First operand 543 states and 677 transitions. Second operand 71 states. [2020-12-22 03:44:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:13,339 INFO L93 Difference]: Finished difference Result 562 states and 700 transitions. [2020-12-22 03:44:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 03:44:13,339 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 475 [2020-12-22 03:44:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:13,341 INFO L225 Difference]: With dead ends: 562 [2020-12-22 03:44:13,341 INFO L226 Difference]: Without dead ends: 558 [2020-12-22 03:44:13,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 03:44:13,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-12-22 03:44:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 551. [2020-12-22 03:44:13,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-12-22 03:44:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 687 transitions. [2020-12-22 03:44:13,347 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 687 transitions. Word has length 475 [2020-12-22 03:44:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:13,347 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 687 transitions. [2020-12-22 03:44:13,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 03:44:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 687 transitions. [2020-12-22 03:44:13,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-12-22 03:44:13,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:13,350 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:13,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:13,562 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:13,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:13,562 INFO L82 PathProgramCache]: Analyzing trace with hash 868305541, now seen corresponding path program 68 times [2020-12-22 03:44:13,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:13,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398270365] [2020-12-22 03:44:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16014 backedges. 0 proven. 16014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:16,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398270365] [2020-12-22 03:44:16,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430094464] [2020-12-22 03:44:16,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:16,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:16,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1537 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 03:44:16,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16014 backedges. 0 proven. 16014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:17,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:17,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-22 03:44:17,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011649032] [2020-12-22 03:44:17,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 03:44:17,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:17,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 03:44:17,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:44:17,141 INFO L87 Difference]: Start difference. First operand 551 states and 687 transitions. Second operand 72 states. [2020-12-22 03:44:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:17,859 INFO L93 Difference]: Finished difference Result 570 states and 710 transitions. [2020-12-22 03:44:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-22 03:44:17,860 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 482 [2020-12-22 03:44:17,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:17,863 INFO L225 Difference]: With dead ends: 570 [2020-12-22 03:44:17,863 INFO L226 Difference]: Without dead ends: 566 [2020-12-22 03:44:17,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 03:44:17,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2020-12-22 03:44:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 559. [2020-12-22 03:44:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2020-12-22 03:44:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 697 transitions. [2020-12-22 03:44:17,872 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 697 transitions. Word has length 482 [2020-12-22 03:44:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:17,872 INFO L481 AbstractCegarLoop]: Abstraction has 559 states and 697 transitions. [2020-12-22 03:44:17,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-22 03:44:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 697 transitions. [2020-12-22 03:44:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-12-22 03:44:17,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:17,876 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:18,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 03:44:18,089 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1613415606, now seen corresponding path program 69 times [2020-12-22 03:44:18,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:18,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578707619] [2020-12-22 03:44:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16491 backedges. 0 proven. 16491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:20,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578707619] [2020-12-22 03:44:20,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450777637] [2020-12-22 03:44:20,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:21,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-22 03:44:21,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:21,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1559 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 03:44:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16491 backedges. 0 proven. 16491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:21,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:21,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-22 03:44:21,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990555910] [2020-12-22 03:44:21,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-22 03:44:21,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-22 03:44:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:44:21,993 INFO L87 Difference]: Start difference. First operand 559 states and 697 transitions. Second operand 73 states. [2020-12-22 03:44:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:22,848 INFO L93 Difference]: Finished difference Result 578 states and 720 transitions. [2020-12-22 03:44:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 03:44:22,848 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 489 [2020-12-22 03:44:22,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:22,850 INFO L225 Difference]: With dead ends: 578 [2020-12-22 03:44:22,850 INFO L226 Difference]: Without dead ends: 574 [2020-12-22 03:44:22,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-22 03:44:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-12-22 03:44:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 567. [2020-12-22 03:44:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-12-22 03:44:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 707 transitions. [2020-12-22 03:44:22,857 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 707 transitions. Word has length 489 [2020-12-22 03:44:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:22,857 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 707 transitions. [2020-12-22 03:44:22,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-22 03:44:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 707 transitions. [2020-12-22 03:44:22,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-12-22 03:44:22,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:22,860 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:23,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:23,073 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:23,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1293787493, now seen corresponding path program 70 times [2020-12-22 03:44:23,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:23,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730994191] [2020-12-22 03:44:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16975 backedges. 0 proven. 16975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:26,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730994191] [2020-12-22 03:44:26,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146090724] [2020-12-22 03:44:26,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:26,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:26,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:26,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 03:44:26,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16975 backedges. 0 proven. 16975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:26,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:26,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-22 03:44:26,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790614908] [2020-12-22 03:44:26,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-22 03:44:26,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:26,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-22 03:44:26,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:44:26,838 INFO L87 Difference]: Start difference. First operand 567 states and 707 transitions. Second operand 74 states. [2020-12-22 03:44:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:27,666 INFO L93 Difference]: Finished difference Result 586 states and 730 transitions. [2020-12-22 03:44:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-22 03:44:27,669 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 496 [2020-12-22 03:44:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:27,672 INFO L225 Difference]: With dead ends: 586 [2020-12-22 03:44:27,672 INFO L226 Difference]: Without dead ends: 582 [2020-12-22 03:44:27,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 03:44:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2020-12-22 03:44:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 575. [2020-12-22 03:44:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2020-12-22 03:44:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 717 transitions. [2020-12-22 03:44:27,682 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 717 transitions. Word has length 496 [2020-12-22 03:44:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:27,682 INFO L481 AbstractCegarLoop]: Abstraction has 575 states and 717 transitions. [2020-12-22 03:44:27,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-22 03:44:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 717 transitions. [2020-12-22 03:44:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-12-22 03:44:27,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:27,686 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:27,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 03:44:27,901 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:27,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:27,902 INFO L82 PathProgramCache]: Analyzing trace with hash -781651498, now seen corresponding path program 71 times [2020-12-22 03:44:27,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:27,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23951145] [2020-12-22 03:44:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17466 backedges. 0 proven. 17466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23951145] [2020-12-22 03:44:31,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646265707] [2020-12-22 03:44:31,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:31,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-22 03:44:31,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:31,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 03:44:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17466 backedges. 0 proven. 17466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:32,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:32,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-22 03:44:32,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801310224] [2020-12-22 03:44:32,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-22 03:44:32,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:32,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-22 03:44:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:44:32,028 INFO L87 Difference]: Start difference. First operand 575 states and 717 transitions. Second operand 75 states. [2020-12-22 03:44:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:32,708 INFO L93 Difference]: Finished difference Result 594 states and 740 transitions. [2020-12-22 03:44:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 03:44:32,709 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 503 [2020-12-22 03:44:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:32,711 INFO L225 Difference]: With dead ends: 594 [2020-12-22 03:44:32,711 INFO L226 Difference]: Without dead ends: 590 [2020-12-22 03:44:32,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 03:44:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-12-22 03:44:32,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 583. [2020-12-22 03:44:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-12-22 03:44:32,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 727 transitions. [2020-12-22 03:44:32,717 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 727 transitions. Word has length 503 [2020-12-22 03:44:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:32,717 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 727 transitions. [2020-12-22 03:44:32,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-22 03:44:32,718 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 727 transitions. [2020-12-22 03:44:32,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-12-22 03:44:32,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:32,720 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:32,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:32,921 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:32,922 INFO L82 PathProgramCache]: Analyzing trace with hash 724070469, now seen corresponding path program 72 times [2020-12-22 03:44:32,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:32,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226999891] [2020-12-22 03:44:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17964 backedges. 0 proven. 17964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:36,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226999891] [2020-12-22 03:44:36,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305724510] [2020-12-22 03:44:36,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:36,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-22 03:44:36,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 03:44:36,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17964 backedges. 0 proven. 17964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:37,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:37,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-22 03:44:37,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542182054] [2020-12-22 03:44:37,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-22 03:44:37,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:37,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-22 03:44:37,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:44:37,209 INFO L87 Difference]: Start difference. First operand 583 states and 727 transitions. Second operand 76 states. [2020-12-22 03:44:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:38,097 INFO L93 Difference]: Finished difference Result 602 states and 750 transitions. [2020-12-22 03:44:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-22 03:44:38,098 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 510 [2020-12-22 03:44:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:38,100 INFO L225 Difference]: With dead ends: 602 [2020-12-22 03:44:38,100 INFO L226 Difference]: Without dead ends: 598 [2020-12-22 03:44:38,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 03:44:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-12-22 03:44:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 591. [2020-12-22 03:44:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-12-22 03:44:38,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 737 transitions. [2020-12-22 03:44:38,106 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 737 transitions. Word has length 510 [2020-12-22 03:44:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:38,106 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 737 transitions. [2020-12-22 03:44:38,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-22 03:44:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 737 transitions. [2020-12-22 03:44:38,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-12-22 03:44:38,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:38,108 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:38,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:38,309 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:38,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:38,310 INFO L82 PathProgramCache]: Analyzing trace with hash 188851958, now seen corresponding path program 73 times [2020-12-22 03:44:38,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:38,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471024146] [2020-12-22 03:44:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18469 backedges. 0 proven. 18469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:41,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471024146] [2020-12-22 03:44:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679997901] [2020-12-22 03:44:41,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:41,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 03:44:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18469 backedges. 0 proven. 18469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:42,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:42,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-22 03:44:42,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833431149] [2020-12-22 03:44:42,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-22 03:44:42,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:42,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-22 03:44:42,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:44:42,440 INFO L87 Difference]: Start difference. First operand 591 states and 737 transitions. Second operand 77 states. [2020-12-22 03:44:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:43,359 INFO L93 Difference]: Finished difference Result 610 states and 760 transitions. [2020-12-22 03:44:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 03:44:43,360 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 517 [2020-12-22 03:44:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:43,362 INFO L225 Difference]: With dead ends: 610 [2020-12-22 03:44:43,362 INFO L226 Difference]: Without dead ends: 606 [2020-12-22 03:44:43,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-22 03:44:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-22 03:44:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 599. [2020-12-22 03:44:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-12-22 03:44:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 747 transitions. [2020-12-22 03:44:43,369 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 747 transitions. Word has length 517 [2020-12-22 03:44:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:43,369 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 747 transitions. [2020-12-22 03:44:43,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-22 03:44:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 747 transitions. [2020-12-22 03:44:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2020-12-22 03:44:43,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:43,371 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:43,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:43,572 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:43,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:43,573 INFO L82 PathProgramCache]: Analyzing trace with hash -550521051, now seen corresponding path program 74 times [2020-12-22 03:44:43,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:43,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393260938] [2020-12-22 03:44:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 18981 backedges. 0 proven. 18981 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:46,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393260938] [2020-12-22 03:44:46,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610665652] [2020-12-22 03:44:46,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:47,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:44:47,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:47,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 03:44:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18981 backedges. 0 proven. 18981 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:47,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:47,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-22 03:44:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710706645] [2020-12-22 03:44:47,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-22 03:44:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:47,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-22 03:44:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:44:47,836 INFO L87 Difference]: Start difference. First operand 599 states and 747 transitions. Second operand 78 states. [2020-12-22 03:44:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:48,582 INFO L93 Difference]: Finished difference Result 618 states and 770 transitions. [2020-12-22 03:44:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-22 03:44:48,584 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 524 [2020-12-22 03:44:48,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:48,586 INFO L225 Difference]: With dead ends: 618 [2020-12-22 03:44:48,587 INFO L226 Difference]: Without dead ends: 614 [2020-12-22 03:44:48,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 03:44:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2020-12-22 03:44:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 607. [2020-12-22 03:44:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 607 states. [2020-12-22 03:44:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 757 transitions. [2020-12-22 03:44:48,594 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 757 transitions. Word has length 524 [2020-12-22 03:44:48,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:48,595 INFO L481 AbstractCegarLoop]: Abstraction has 607 states and 757 transitions. [2020-12-22 03:44:48,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-22 03:44:48,595 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 757 transitions. [2020-12-22 03:44:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-12-22 03:44:48,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:48,597 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:48,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-22 03:44:48,798 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2002328554, now seen corresponding path program 75 times [2020-12-22 03:44:48,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:48,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720291644] [2020-12-22 03:44:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19500 backedges. 0 proven. 19500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:52,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720291644] [2020-12-22 03:44:52,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638751363] [2020-12-22 03:44:52,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:52,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-22 03:44:52,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:52,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 03:44:52,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 19500 backedges. 0 proven. 19500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:53,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:53,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-22 03:44:53,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634097997] [2020-12-22 03:44:53,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-22 03:44:53,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-22 03:44:53,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:44:53,398 INFO L87 Difference]: Start difference. First operand 607 states and 757 transitions. Second operand 79 states. [2020-12-22 03:44:54,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:44:54,471 INFO L93 Difference]: Finished difference Result 626 states and 780 transitions. [2020-12-22 03:44:54,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 03:44:54,471 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 531 [2020-12-22 03:44:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:44:54,474 INFO L225 Difference]: With dead ends: 626 [2020-12-22 03:44:54,474 INFO L226 Difference]: Without dead ends: 622 [2020-12-22 03:44:54,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 03:44:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2020-12-22 03:44:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 615. [2020-12-22 03:44:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2020-12-22 03:44:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 767 transitions. [2020-12-22 03:44:54,480 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 767 transitions. Word has length 531 [2020-12-22 03:44:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:44:54,480 INFO L481 AbstractCegarLoop]: Abstraction has 615 states and 767 transitions. [2020-12-22 03:44:54,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-22 03:44:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 767 transitions. [2020-12-22 03:44:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-12-22 03:44:54,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:44:54,483 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1] [2020-12-22 03:44:54,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:44:54,684 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:44:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:44:54,685 INFO L82 PathProgramCache]: Analyzing trace with hash 436303365, now seen corresponding path program 76 times [2020-12-22 03:44:54,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:44:54,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94426755] [2020-12-22 03:44:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:44:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:44:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20026 backedges. 0 proven. 20026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:58,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94426755] [2020-12-22 03:44:58,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890356391] [2020-12-22 03:44:58,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:44:58,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:44:58,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:44:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1713 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-22 03:44:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:44:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20026 backedges. 0 proven. 20026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:44:59,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:44:59,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-22 03:44:59,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942734690] [2020-12-22 03:44:59,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-22 03:44:59,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:44:59,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-22 03:44:59,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:44:59,148 INFO L87 Difference]: Start difference. First operand 615 states and 767 transitions. Second operand 80 states. [2020-12-22 03:45:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:00,309 INFO L93 Difference]: Finished difference Result 634 states and 790 transitions. [2020-12-22 03:45:00,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-22 03:45:00,310 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 538 [2020-12-22 03:45:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:00,312 INFO L225 Difference]: With dead ends: 634 [2020-12-22 03:45:00,312 INFO L226 Difference]: Without dead ends: 630 [2020-12-22 03:45:00,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 03:45:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-12-22 03:45:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 623. [2020-12-22 03:45:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-12-22 03:45:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 777 transitions. [2020-12-22 03:45:00,318 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 777 transitions. Word has length 538 [2020-12-22 03:45:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:00,319 INFO L481 AbstractCegarLoop]: Abstraction has 623 states and 777 transitions. [2020-12-22 03:45:00,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-22 03:45:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 777 transitions. [2020-12-22 03:45:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2020-12-22 03:45:00,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:00,321 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:00,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:00,527 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:00,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1257592522, now seen corresponding path program 77 times [2020-12-22 03:45:00,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:00,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736114985] [2020-12-22 03:45:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20559 backedges. 0 proven. 20559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:04,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736114985] [2020-12-22 03:45:04,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281551315] [2020-12-22 03:45:04,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:04,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-22 03:45:04,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:04,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 03:45:04,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20559 backedges. 0 proven. 20559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:05,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:05,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-22 03:45:05,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910162716] [2020-12-22 03:45:05,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-22 03:45:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:05,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-22 03:45:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:45:05,534 INFO L87 Difference]: Start difference. First operand 623 states and 777 transitions. Second operand 81 states. [2020-12-22 03:45:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:06,693 INFO L93 Difference]: Finished difference Result 642 states and 800 transitions. [2020-12-22 03:45:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 03:45:06,693 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 545 [2020-12-22 03:45:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:06,695 INFO L225 Difference]: With dead ends: 642 [2020-12-22 03:45:06,695 INFO L226 Difference]: Without dead ends: 638 [2020-12-22 03:45:06,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 03:45:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2020-12-22 03:45:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 631. [2020-12-22 03:45:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-22 03:45:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 787 transitions. [2020-12-22 03:45:06,702 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 787 transitions. Word has length 545 [2020-12-22 03:45:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:06,702 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 787 transitions. [2020-12-22 03:45:06,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-22 03:45:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 787 transitions. [2020-12-22 03:45:06,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2020-12-22 03:45:06,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:06,704 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:06,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 03:45:06,905 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:06,906 INFO L82 PathProgramCache]: Analyzing trace with hash 199994597, now seen corresponding path program 78 times [2020-12-22 03:45:06,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:06,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807574590] [2020-12-22 03:45:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 0 proven. 21099 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:10,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807574590] [2020-12-22 03:45:10,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089633798] [2020-12-22 03:45:10,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:11,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-22 03:45:11,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1757 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 03:45:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 0 proven. 21099 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:11,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:11,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-22 03:45:11,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529726623] [2020-12-22 03:45:11,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-22 03:45:11,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-22 03:45:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 03:45:11,932 INFO L87 Difference]: Start difference. First operand 631 states and 787 transitions. Second operand 82 states. [2020-12-22 03:45:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:13,055 INFO L93 Difference]: Finished difference Result 650 states and 810 transitions. [2020-12-22 03:45:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-22 03:45:13,056 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 552 [2020-12-22 03:45:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:13,058 INFO L225 Difference]: With dead ends: 650 [2020-12-22 03:45:13,058 INFO L226 Difference]: Without dead ends: 646 [2020-12-22 03:45:13,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 03:45:13,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-12-22 03:45:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 639. [2020-12-22 03:45:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-12-22 03:45:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 797 transitions. [2020-12-22 03:45:13,064 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 797 transitions. Word has length 552 [2020-12-22 03:45:13,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:13,065 INFO L481 AbstractCegarLoop]: Abstraction has 639 states and 797 transitions. [2020-12-22 03:45:13,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-22 03:45:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 797 transitions. [2020-12-22 03:45:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2020-12-22 03:45:13,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:13,067 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:13,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-22 03:45:13,268 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:13,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash 207550038, now seen corresponding path program 79 times [2020-12-22 03:45:13,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:13,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775826256] [2020-12-22 03:45:13,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21646 backedges. 0 proven. 21646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:17,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775826256] [2020-12-22 03:45:17,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530568803] [2020-12-22 03:45:17,163 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 03:45:17,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21646 backedges. 0 proven. 21646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:18,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:18,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-22 03:45:18,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979055039] [2020-12-22 03:45:18,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-22 03:45:18,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:18,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-22 03:45:18,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 03:45:18,126 INFO L87 Difference]: Start difference. First operand 639 states and 797 transitions. Second operand 83 states. [2020-12-22 03:45:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:18,965 INFO L93 Difference]: Finished difference Result 658 states and 820 transitions. [2020-12-22 03:45:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 03:45:18,966 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 559 [2020-12-22 03:45:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:18,969 INFO L225 Difference]: With dead ends: 658 [2020-12-22 03:45:18,969 INFO L226 Difference]: Without dead ends: 654 [2020-12-22 03:45:18,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-22 03:45:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2020-12-22 03:45:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 647. [2020-12-22 03:45:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 647 states. [2020-12-22 03:45:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 807 transitions. [2020-12-22 03:45:18,977 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 807 transitions. Word has length 559 [2020-12-22 03:45:18,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:18,977 INFO L481 AbstractCegarLoop]: Abstraction has 647 states and 807 transitions. [2020-12-22 03:45:18,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-22 03:45:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 807 transitions. [2020-12-22 03:45:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2020-12-22 03:45:18,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:18,980 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:19,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:19,181 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:19,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1153194949, now seen corresponding path program 80 times [2020-12-22 03:45:19,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:19,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355218298] [2020-12-22 03:45:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22200 backedges. 0 proven. 22200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:23,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355218298] [2020-12-22 03:45:23,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287902744] [2020-12-22 03:45:23,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:23,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:45:23,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:23,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 03:45:23,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22200 backedges. 0 proven. 22200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:24,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:24,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-22 03:45:24,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765502422] [2020-12-22 03:45:24,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-22 03:45:24,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-22 03:45:24,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 03:45:24,130 INFO L87 Difference]: Start difference. First operand 647 states and 807 transitions. Second operand 84 states. [2020-12-22 03:45:25,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:25,551 INFO L93 Difference]: Finished difference Result 666 states and 830 transitions. [2020-12-22 03:45:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-22 03:45:25,551 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 566 [2020-12-22 03:45:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:25,554 INFO L225 Difference]: With dead ends: 666 [2020-12-22 03:45:25,554 INFO L226 Difference]: Without dead ends: 662 [2020-12-22 03:45:25,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 03:45:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-12-22 03:45:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 655. [2020-12-22 03:45:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2020-12-22 03:45:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 817 transitions. [2020-12-22 03:45:25,564 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 817 transitions. Word has length 566 [2020-12-22 03:45:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:25,564 INFO L481 AbstractCegarLoop]: Abstraction has 655 states and 817 transitions. [2020-12-22 03:45:25,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-22 03:45:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 817 transitions. [2020-12-22 03:45:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2020-12-22 03:45:25,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:25,567 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:25,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:25,768 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:25,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:25,769 INFO L82 PathProgramCache]: Analyzing trace with hash 991284086, now seen corresponding path program 81 times [2020-12-22 03:45:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:25,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759345702] [2020-12-22 03:45:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 22761 backedges. 0 proven. 22761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:29,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759345702] [2020-12-22 03:45:29,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665492258] [2020-12-22 03:45:29,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:30,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-22 03:45:30,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 03:45:30,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22761 backedges. 0 proven. 22761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:31,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:31,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-22 03:45:31,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256969563] [2020-12-22 03:45:31,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-22 03:45:31,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:31,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-22 03:45:31,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 03:45:31,127 INFO L87 Difference]: Start difference. First operand 655 states and 817 transitions. Second operand 85 states. [2020-12-22 03:45:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:32,172 INFO L93 Difference]: Finished difference Result 674 states and 840 transitions. [2020-12-22 03:45:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 03:45:32,173 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 573 [2020-12-22 03:45:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:32,175 INFO L225 Difference]: With dead ends: 674 [2020-12-22 03:45:32,175 INFO L226 Difference]: Without dead ends: 670 [2020-12-22 03:45:32,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 03:45:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-12-22 03:45:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 663. [2020-12-22 03:45:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663 states. [2020-12-22 03:45:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 827 transitions. [2020-12-22 03:45:32,184 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 827 transitions. Word has length 573 [2020-12-22 03:45:32,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:32,184 INFO L481 AbstractCegarLoop]: Abstraction has 663 states and 827 transitions. [2020-12-22 03:45:32,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-22 03:45:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 827 transitions. [2020-12-22 03:45:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2020-12-22 03:45:32,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:32,187 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:32,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:32,388 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:32,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1816034651, now seen corresponding path program 82 times [2020-12-22 03:45:32,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:32,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281877028] [2020-12-22 03:45:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 23329 backedges. 0 proven. 23329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:36,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281877028] [2020-12-22 03:45:36,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725949079] [2020-12-22 03:45:36,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:36,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:45:36,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 03:45:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23329 backedges. 0 proven. 23329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:37,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:37,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-22 03:45:37,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561683428] [2020-12-22 03:45:37,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-22 03:45:37,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:37,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-22 03:45:37,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 03:45:37,604 INFO L87 Difference]: Start difference. First operand 663 states and 827 transitions. Second operand 86 states. [2020-12-22 03:45:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:39,070 INFO L93 Difference]: Finished difference Result 682 states and 850 transitions. [2020-12-22 03:45:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 03:45:39,071 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 580 [2020-12-22 03:45:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:39,073 INFO L225 Difference]: With dead ends: 682 [2020-12-22 03:45:39,073 INFO L226 Difference]: Without dead ends: 678 [2020-12-22 03:45:39,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 03:45:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2020-12-22 03:45:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 671. [2020-12-22 03:45:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2020-12-22 03:45:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 837 transitions. [2020-12-22 03:45:39,084 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 837 transitions. Word has length 580 [2020-12-22 03:45:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:39,085 INFO L481 AbstractCegarLoop]: Abstraction has 671 states and 837 transitions. [2020-12-22 03:45:39,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-22 03:45:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 837 transitions. [2020-12-22 03:45:39,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2020-12-22 03:45:39,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:39,089 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:39,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:39,304 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:39,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1042360470, now seen corresponding path program 83 times [2020-12-22 03:45:39,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:39,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493961280] [2020-12-22 03:45:39,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 23904 backedges. 0 proven. 23904 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:43,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493961280] [2020-12-22 03:45:43,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293372643] [2020-12-22 03:45:43,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:44,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-22 03:45:44,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:44,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 03:45:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 23904 backedges. 0 proven. 23904 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:45,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:45,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-22 03:45:45,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920152332] [2020-12-22 03:45:45,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-22 03:45:45,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-22 03:45:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 03:45:45,013 INFO L87 Difference]: Start difference. First operand 671 states and 837 transitions. Second operand 87 states. [2020-12-22 03:45:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:46,196 INFO L93 Difference]: Finished difference Result 690 states and 860 transitions. [2020-12-22 03:45:46,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-22 03:45:46,197 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 587 [2020-12-22 03:45:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:46,199 INFO L225 Difference]: With dead ends: 690 [2020-12-22 03:45:46,199 INFO L226 Difference]: Without dead ends: 686 [2020-12-22 03:45:46,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-22 03:45:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2020-12-22 03:45:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 679. [2020-12-22 03:45:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2020-12-22 03:45:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 847 transitions. [2020-12-22 03:45:46,207 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 847 transitions. Word has length 587 [2020-12-22 03:45:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:46,208 INFO L481 AbstractCegarLoop]: Abstraction has 679 states and 847 transitions. [2020-12-22 03:45:46,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-22 03:45:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 847 transitions. [2020-12-22 03:45:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2020-12-22 03:45:46,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:46,211 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:46,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:45:46,412 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash -406249083, now seen corresponding path program 84 times [2020-12-22 03:45:46,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:46,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317022113] [2020-12-22 03:45:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24486 backedges. 0 proven. 24486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:50,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317022113] [2020-12-22 03:45:50,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959191539] [2020-12-22 03:45:50,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:51,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-12-22 03:45:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:45:51,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-22 03:45:51,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24486 backedges. 0 proven. 24486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:52,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:52,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-22 03:45:52,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101812119] [2020-12-22 03:45:52,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-22 03:45:52,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-22 03:45:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 03:45:52,267 INFO L87 Difference]: Start difference. First operand 679 states and 847 transitions. Second operand 88 states. [2020-12-22 03:45:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:45:53,496 INFO L93 Difference]: Finished difference Result 698 states and 870 transitions. [2020-12-22 03:45:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 03:45:53,497 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 594 [2020-12-22 03:45:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:45:53,499 INFO L225 Difference]: With dead ends: 698 [2020-12-22 03:45:53,499 INFO L226 Difference]: Without dead ends: 694 [2020-12-22 03:45:53,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 03:45:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2020-12-22 03:45:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 687. [2020-12-22 03:45:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687 states. [2020-12-22 03:45:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 857 transitions. [2020-12-22 03:45:53,509 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 857 transitions. Word has length 594 [2020-12-22 03:45:53,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:45:53,509 INFO L481 AbstractCegarLoop]: Abstraction has 687 states and 857 transitions. [2020-12-22 03:45:53,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-22 03:45:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 857 transitions. [2020-12-22 03:45:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2020-12-22 03:45:53,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:45:53,513 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1] [2020-12-22 03:45:53,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2020-12-22 03:45:53,714 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:45:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:45:53,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2098000458, now seen corresponding path program 85 times [2020-12-22 03:45:53,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:45:53,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464211654] [2020-12-22 03:45:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:45:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25075 backedges. 0 proven. 25075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:58,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464211654] [2020-12-22 03:45:58,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385327912] [2020-12-22 03:45:58,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:45:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:45:58,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 03:45:58,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:45:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25075 backedges. 0 proven. 25075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:45:59,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:45:59,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-12-22 03:45:59,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798415483] [2020-12-22 03:45:59,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-22 03:45:59,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:45:59,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-22 03:45:59,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 03:45:59,397 INFO L87 Difference]: Start difference. First operand 687 states and 857 transitions. Second operand 89 states. [2020-12-22 03:46:00,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:00,348 INFO L93 Difference]: Finished difference Result 706 states and 880 transitions. [2020-12-22 03:46:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 03:46:00,349 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 601 [2020-12-22 03:46:00,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:00,350 INFO L225 Difference]: With dead ends: 706 [2020-12-22 03:46:00,350 INFO L226 Difference]: Without dead ends: 702 [2020-12-22 03:46:00,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-22 03:46:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-12-22 03:46:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 695. [2020-12-22 03:46:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-12-22 03:46:00,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 867 transitions. [2020-12-22 03:46:00,359 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 867 transitions. Word has length 601 [2020-12-22 03:46:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:00,359 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 867 transitions. [2020-12-22 03:46:00,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-22 03:46:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 867 transitions. [2020-12-22 03:46:00,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2020-12-22 03:46:00,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:00,364 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:00,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:46:00,579 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash 790706277, now seen corresponding path program 86 times [2020-12-22 03:46:00,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:00,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240414732] [2020-12-22 03:46:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:46:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25671 backedges. 0 proven. 25671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:05,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240414732] [2020-12-22 03:46:05,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378857392] [2020-12-22 03:46:05,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-12-22 03:46:05,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:46:05,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:46:05,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 03:46:05,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:46:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25671 backedges. 0 proven. 25671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:46:06,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:46:06,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-12-22 03:46:06,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097700979] [2020-12-22 03:46:06,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-22 03:46:06,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:46:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-22 03:46:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 03:46:06,360 INFO L87 Difference]: Start difference. First operand 695 states and 867 transitions. Second operand 90 states. [2020-12-22 03:46:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:46:07,311 INFO L93 Difference]: Finished difference Result 714 states and 890 transitions. [2020-12-22 03:46:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-22 03:46:07,311 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 608 [2020-12-22 03:46:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:46:07,313 INFO L225 Difference]: With dead ends: 714 [2020-12-22 03:46:07,313 INFO L226 Difference]: Without dead ends: 710 [2020-12-22 03:46:07,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 03:46:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-12-22 03:46:07,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 703. [2020-12-22 03:46:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2020-12-22 03:46:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 877 transitions. [2020-12-22 03:46:07,320 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 877 transitions. Word has length 608 [2020-12-22 03:46:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:46:07,320 INFO L481 AbstractCegarLoop]: Abstraction has 703 states and 877 transitions. [2020-12-22 03:46:07,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-22 03:46:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 877 transitions. [2020-12-22 03:46:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2020-12-22 03:46:07,323 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:46:07,323 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1] [2020-12-22 03:46:07,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-22 03:46:07,531 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:46:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:46:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash 125663958, now seen corresponding path program 87 times [2020-12-22 03:46:07,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:46:07,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247836032] [2020-12-22 03:46:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:46:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat