/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/array-cav19/array_init_var_plus_ind.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:43:26,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:43:26,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:43:26,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:43:26,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:43:26,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:43:26,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:43:26,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:43:26,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:43:26,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:43:26,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:43:26,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:43:26,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:43:26,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:43:26,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:43:26,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:43:26,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:43:26,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:43:26,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:43:26,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:43:26,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:43:26,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:43:26,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:43:26,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:43:26,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:43:26,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:43:26,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:43:26,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:43:26,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:43:26,441 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:43:26,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:43:26,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:43:26,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:43:26,444 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:43:26,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:43:26,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:43:26,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:43:26,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:43:26,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:43:26,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:43:26,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:43:26,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:43:26,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:43:26,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:43:26,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:43:26,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:43:26,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:43:26,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:43:26,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:43:26,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:43:26,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:43:26,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:43:26,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:43:26,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:43:26,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:43:26,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:43:26,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:43:26,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:43:26,883 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:43:26,884 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:43:26,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2020-12-21 22:43:26,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71003176a/79c56d085acb4cc98b4f16bcd94f7c9a/FLAGdd67bc141 [2020-12-21 22:43:27,830 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:43:27,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2020-12-21 22:43:27,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71003176a/79c56d085acb4cc98b4f16bcd94f7c9a/FLAGdd67bc141 [2020-12-21 22:43:28,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71003176a/79c56d085acb4cc98b4f16bcd94f7c9a [2020-12-21 22:43:28,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:43:28,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:43:28,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:43:28,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:43:28,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:43:28,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bfb0f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28, skipping insertion in model container [2020-12-21 22:43:28,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,204 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:43:28,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:43:28,378 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/array-cav19/array_init_var_plus_ind.c[414,427] [2020-12-21 22:43:28,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:43:28,410 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:43:28,424 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/array-cav19/array_init_var_plus_ind.c[414,427] [2020-12-21 22:43:28,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:43:28,448 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:43:28,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28 WrapperNode [2020-12-21 22:43:28,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:43:28,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:43:28,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:43:28,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:43:28,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:43:28,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:43:28,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:43:28,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:43:28,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (1/1) ... [2020-12-21 22:43:28,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:43:28,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:43:28,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:43:28,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:43:28,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (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 [2020-12-21 22:43:28,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:43:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:43:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:43:28,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:43:28,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:43:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:43:28,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:43:28,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:43:28,962 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 22:43:28,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:43:28 BoogieIcfgContainer [2020-12-21 22:43:28,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:43:28,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:43:28,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:43:28,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:43:28,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:43:28" (1/3) ... [2020-12-21 22:43:28,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7d0747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:43:28, skipping insertion in model container [2020-12-21 22:43:28,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:43:28" (2/3) ... [2020-12-21 22:43:28,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7d0747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:43:28, skipping insertion in model container [2020-12-21 22:43:28,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:43:28" (3/3) ... [2020-12-21 22:43:28,992 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2020-12-21 22:43:29,013 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:43:29,025 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:43:29,075 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:43:29,110 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:43:29,110 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:43:29,110 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:43:29,110 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:43:29,111 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:43:29,111 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:43:29,111 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:43:29,111 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:43:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-21 22:43:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 22:43:29,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:29,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:29,139 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:29,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:29,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2020-12-21 22:43:29,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:29,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268653539] [2020-12-21 22:43:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:29,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268653539] [2020-12-21 22:43:29,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:43:29,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:43:29,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954651428] [2020-12-21 22:43:29,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:43:29,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:29,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:43:29,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:43:29,371 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-21 22:43:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:29,394 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2020-12-21 22:43:29,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:43:29,396 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-21 22:43:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:29,408 INFO L225 Difference]: With dead ends: 27 [2020-12-21 22:43:29,409 INFO L226 Difference]: Without dead ends: 12 [2020-12-21 22:43:29,412 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 [2020-12-21 22:43:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-21 22:43:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-21 22:43:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-21 22:43:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-21 22:43:29,457 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-12-21 22:43:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:29,457 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-21 22:43:29,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:43:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-21 22:43:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 22:43:29,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:29,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:29,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:43:29,459 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2020-12-21 22:43:29,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:29,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047929199] [2020-12-21 22:43:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:29,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047929199] [2020-12-21 22:43:29,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:43:29,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:43:29,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957518135] [2020-12-21 22:43:29,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:43:29,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:29,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:43:29,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:43:29,568 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 4 states. [2020-12-21 22:43:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:29,619 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-21 22:43:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:43:29,621 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-21 22:43:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:29,622 INFO L225 Difference]: With dead ends: 29 [2020-12-21 22:43:29,622 INFO L226 Difference]: Without dead ends: 22 [2020-12-21 22:43:29,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:43:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-21 22:43:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2020-12-21 22:43:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-21 22:43:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-21 22:43:29,628 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2020-12-21 22:43:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:29,629 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-21 22:43:29,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:43:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-21 22:43:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 22:43:29,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:29,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:29,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 22:43:29,630 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:29,631 INFO L82 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2020-12-21 22:43:29,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:29,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423386985] [2020-12-21 22:43:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:29,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423386985] [2020-12-21 22:43:29,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:43:29,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:43:29,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255078740] [2020-12-21 22:43:29,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:43:29,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:29,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:43:29,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:43:29,703 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2020-12-21 22:43:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:29,746 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-12-21 22:43:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:43:29,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-21 22:43:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:29,748 INFO L225 Difference]: With dead ends: 23 [2020-12-21 22:43:29,748 INFO L226 Difference]: Without dead ends: 15 [2020-12-21 22:43:29,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:43:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-21 22:43:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-21 22:43:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 22:43:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-21 22:43:29,759 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2020-12-21 22:43:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:29,759 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-21 22:43:29,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:43:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-21 22:43:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:43:29,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:29,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:29,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 22:43:29,763 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2020-12-21 22:43:29,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:29,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960299653] [2020-12-21 22:43:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:29,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960299653] [2020-12-21 22:43:29,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027090068] [2020-12-21 22:43:29,887 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 [2020-12-21 22:43:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:29,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:43:29,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:30,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:30,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2020-12-21 22:43:30,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113011632] [2020-12-21 22:43:30,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:43:30,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:30,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:43:30,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:43:30,153 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2020-12-21 22:43:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:30,221 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-21 22:43:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:43:30,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-21 22:43:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:30,222 INFO L225 Difference]: With dead ends: 27 [2020-12-21 22:43:30,222 INFO L226 Difference]: Without dead ends: 18 [2020-12-21 22:43:30,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:43:30,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-21 22:43:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-21 22:43:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:43:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-21 22:43:30,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-21 22:43:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:30,228 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-21 22:43:30,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:43:30,229 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-21 22:43:30,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:43:30,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:30,230 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:30,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:30,444 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash 818898063, now seen corresponding path program 2 times [2020-12-21 22:43:30,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:30,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660375367] [2020-12-21 22:43:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:30,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660375367] [2020-12-21 22:43:30,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43523064] [2020-12-21 22:43:30,521 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 [2020-12-21 22:43:30,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:43:30,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:30,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:43:30,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:30,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:30,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 22:43:30,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244610616] [2020-12-21 22:43:30,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:43:30,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:30,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:43:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:43:30,658 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 9 states. [2020-12-21 22:43:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:30,741 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-12-21 22:43:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:43:30,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-21 22:43:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:30,744 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:43:30,745 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 22:43:30,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:43:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 22:43:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2020-12-21 22:43:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:43:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-21 22:43:30,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-12-21 22:43:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:30,752 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-21 22:43:30,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:43:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-21 22:43:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:43:30,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:30,753 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:30,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:30,967 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2020-12-21 22:43:30,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:30,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253572700] [2020-12-21 22:43:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:31,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253572700] [2020-12-21 22:43:31,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076999689] [2020-12-21 22:43:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:43:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:43:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:31,307 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:31,308 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:31,317 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:31,326 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:43:31,327 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:18 [2020-12-21 22:43:31,384 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:31,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:31,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:31,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2020-12-21 22:43:31,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860338108] [2020-12-21 22:43:31,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:43:31,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:31,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:43:31,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:43:31,413 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 11 states. [2020-12-21 22:43:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:31,600 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-12-21 22:43:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:43:31,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-21 22:43:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:31,602 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:43:31,602 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:43:31,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:43:31,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:43:31,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-12-21 22:43:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:43:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-21 22:43:31,610 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-12-21 22:43:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:31,611 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-21 22:43:31,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:43:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-21 22:43:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:43:31,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:31,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:31,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:31,829 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:31,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:31,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1827520567, now seen corresponding path program 3 times [2020-12-21 22:43:31,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:31,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900073466] [2020-12-21 22:43:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900073466] [2020-12-21 22:43:31,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846585093] [2020-12-21 22:43:31,926 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 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 [2020-12-21 22:43:31,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:43:31,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:31,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:43:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:32,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:32,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-21 22:43:32,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816520310] [2020-12-21 22:43:32,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:43:32,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:32,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:43:32,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:43:32,128 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 11 states. [2020-12-21 22:43:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:32,205 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-21 22:43:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:43:32,206 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-12-21 22:43:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:32,207 INFO L225 Difference]: With dead ends: 47 [2020-12-21 22:43:32,208 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:43:32,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:43:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:43:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2020-12-21 22:43:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 22:43:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-21 22:43:32,216 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2020-12-21 22:43:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:32,216 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-21 22:43:32,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:43:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-21 22:43:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:43:32,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:32,217 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:32,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:32,433 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2020-12-21 22:43:32,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:32,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181053625] [2020-12-21 22:43:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:32,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181053625] [2020-12-21 22:43:32,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169204753] [2020-12-21 22:43:32,714 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 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 [2020-12-21 22:43:32,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:43:32,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:43:32,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:32,823 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:32,824 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:32,833 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:32,836 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:32,836 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:43:32,987 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:32,988 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:43:32,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:33,002 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:33,033 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:43:33,043 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:43:33,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:43:33,123 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:33,127 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:33,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:33,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2020-12-21 22:43:33,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766435271] [2020-12-21 22:43:33,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:43:33,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:33,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:43:33,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:43:33,152 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 13 states. [2020-12-21 22:43:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:33,405 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-21 22:43:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:43:33,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-21 22:43:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:33,406 INFO L225 Difference]: With dead ends: 32 [2020-12-21 22:43:33,406 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 22:43:33,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:43:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 22:43:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-12-21 22:43:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:43:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-21 22:43:33,413 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2020-12-21 22:43:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:33,414 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-21 22:43:33,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:43:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-21 22:43:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:43:33,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:33,415 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:33,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:33,631 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:33,632 INFO L82 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2020-12-21 22:43:33,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:33,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643428138] [2020-12-21 22:43:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643428138] [2020-12-21 22:43:33,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154018314] [2020-12-21 22:43:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:43:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:33,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:43:33,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:33,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:33,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-21 22:43:33,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138430479] [2020-12-21 22:43:33,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:43:33,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:33,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:43:33,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:43:33,918 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 10 states. [2020-12-21 22:43:33,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:33,977 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-21 22:43:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:43:33,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-21 22:43:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:33,980 INFO L225 Difference]: With dead ends: 36 [2020-12-21 22:43:33,980 INFO L226 Difference]: Without dead ends: 24 [2020-12-21 22:43:33,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:43:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-21 22:43:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-21 22:43:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:43:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-21 22:43:33,986 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2020-12-21 22:43:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:33,986 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-21 22:43:33,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:43:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-21 22:43:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:43:33,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:33,987 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:34,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:34,201 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2020-12-21 22:43:34,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:34,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348608930] [2020-12-21 22:43:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:34,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348608930] [2020-12-21 22:43:34,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237846413] [2020-12-21 22:43:34,415 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 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 [2020-12-21 22:43:34,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:43:34,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:34,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:43:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:34,557 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:34,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:34,565 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:34,567 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:34,567 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-21 22:43:34,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:34,854 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:34,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:34,878 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:34,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:43:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:34,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:34,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-21 22:43:34,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537078329] [2020-12-21 22:43:34,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:43:34,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:34,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:43:34,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:43:34,913 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 19 states. [2020-12-21 22:43:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:35,420 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-12-21 22:43:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:43:35,421 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-21 22:43:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:35,422 INFO L225 Difference]: With dead ends: 37 [2020-12-21 22:43:35,422 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 22:43:35,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:43:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 22:43:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-21 22:43:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 22:43:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-21 22:43:35,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-12-21 22:43:35,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:35,429 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-21 22:43:35,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:43:35,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-21 22:43:35,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:43:35,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:35,430 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:35,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 22:43:35,645 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1605494661, now seen corresponding path program 1 times [2020-12-21 22:43:35,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:35,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295973445] [2020-12-21 22:43:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 22:43:35,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295973445] [2020-12-21 22:43:35,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764676686] [2020-12-21 22:43:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:43:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:35,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:43:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 22:43:35,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:35,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-21 22:43:35,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642559031] [2020-12-21 22:43:35,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:43:35,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:35,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:43:35,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:43:35,895 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2020-12-21 22:43:35,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:35,969 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-12-21 22:43:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:43:35,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-12-21 22:43:35,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:35,970 INFO L225 Difference]: With dead ends: 47 [2020-12-21 22:43:35,970 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 22:43:35,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:43:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 22:43:35,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-12-21 22:43:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:43:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-21 22:43:35,977 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2020-12-21 22:43:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:35,977 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-21 22:43:35,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:43:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-21 22:43:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 22:43:35,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:35,978 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:36,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:43:36,194 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:36,195 INFO L82 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2020-12-21 22:43:36,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:36,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441011052] [2020-12-21 22:43:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:36,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441011052] [2020-12-21 22:43:36,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117731725] [2020-12-21 22:43:36,423 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 [2020-12-21 22:43:36,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:43:36,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:36,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 22:43:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:36,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:36,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:36,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:36,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:36,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:43:36,617 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:36,618 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:43:36,620 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:36,623 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:36,648 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:43:36,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:43:36,653 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:43:36,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:36,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:36,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:36,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2020-12-21 22:43:36,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631479020] [2020-12-21 22:43:36,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:43:36,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:36,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:43:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:43:36,766 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2020-12-21 22:43:37,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:37,197 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-21 22:43:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:43:37,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-12-21 22:43:37,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:37,198 INFO L225 Difference]: With dead ends: 36 [2020-12-21 22:43:37,198 INFO L226 Difference]: Without dead ends: 34 [2020-12-21 22:43:37,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:43:37,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-21 22:43:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-12-21 22:43:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:43:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-21 22:43:37,207 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2020-12-21 22:43:37,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:37,207 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-21 22:43:37,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:43:37,207 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-21 22:43:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 22:43:37,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:37,208 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:37,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:37,422 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:37,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:37,423 INFO L82 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 4 times [2020-12-21 22:43:37,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:37,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027270349] [2020-12-21 22:43:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:37,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027270349] [2020-12-21 22:43:37,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134106824] [2020-12-21 22:43:37,814 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 [2020-12-21 22:43:37,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:43:37,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:37,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:43:37,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:38,061 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-21 22:43:38,065 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:38,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:38,071 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:38,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-21 22:43:38,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:38,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:38,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:38,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2020-12-21 22:43:38,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335838661] [2020-12-21 22:43:38,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:43:38,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:38,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:43:38,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:43:38,293 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 27 states. [2020-12-21 22:43:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:38,909 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-12-21 22:43:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:43:38,909 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-21 22:43:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:38,910 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:43:38,910 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 22:43:38,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:43:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 22:43:38,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-21 22:43:38,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:43:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-21 22:43:38,917 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-12-21 22:43:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:38,917 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-21 22:43:38,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:43:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-21 22:43:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 22:43:38,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:38,918 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:39,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:39,133 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:39,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1022889845, now seen corresponding path program 2 times [2020-12-21 22:43:39,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:39,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581854840] [2020-12-21 22:43:39,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:43:39,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581854840] [2020-12-21 22:43:39,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48713713] [2020-12-21 22:43:39,261 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 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 [2020-12-21 22:43:39,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:43:39,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:39,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:43:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:43:39,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:39,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-21 22:43:39,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289593723] [2020-12-21 22:43:39,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:43:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:39,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:43:39,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:43:39,462 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2020-12-21 22:43:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:39,537 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-12-21 22:43:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:43:39,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-21 22:43:39,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:39,538 INFO L225 Difference]: With dead ends: 62 [2020-12-21 22:43:39,539 INFO L226 Difference]: Without dead ends: 49 [2020-12-21 22:43:39,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:43:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-21 22:43:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2020-12-21 22:43:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:43:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-21 22:43:39,546 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-12-21 22:43:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:39,546 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-21 22:43:39,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:43:39,547 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-21 22:43:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:43:39,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:39,547 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:39,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 22:43:39,763 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:39,764 INFO L82 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 5 times [2020-12-21 22:43:39,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:39,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102753789] [2020-12-21 22:43:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:40,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102753789] [2020-12-21 22:43:40,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71936214] [2020-12-21 22:43:40,154 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 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 [2020-12-21 22:43:40,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 22:43:40,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:40,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 22:43:40,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:40,291 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:40,292 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:40,302 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:40,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:40,304 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2020-12-21 22:43:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-21 22:43:40,387 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2020-12-21 22:43:40,389 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:40,399 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:40,402 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:40,402 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:21 [2020-12-21 22:43:40,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:40,530 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:40,533 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:40,537 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:40,542 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:43:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:40,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:40,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-12-21 22:43:40,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139669028] [2020-12-21 22:43:40,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:43:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:43:40,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:43:40,596 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2020-12-21 22:43:41,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:41,188 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-21 22:43:41,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:43:41,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2020-12-21 22:43:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:41,189 INFO L225 Difference]: With dead ends: 43 [2020-12-21 22:43:41,189 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:43:41,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:43:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:43:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-12-21 22:43:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 22:43:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-21 22:43:41,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-12-21 22:43:41,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:41,199 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-21 22:43:41,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:43:41,199 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-21 22:43:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:43:41,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:41,200 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:41,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:43:41,416 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:41,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:41,417 INFO L82 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 6 times [2020-12-21 22:43:41,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:41,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122806309] [2020-12-21 22:43:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:41,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122806309] [2020-12-21 22:43:41,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010116187] [2020-12-21 22:43:41,845 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 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 [2020-12-21 22:43:41,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-21 22:43:41,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:41,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 22:43:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:42,207 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:42,208 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:42,215 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:42,216 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:42,216 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-21 22:43:42,633 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:42,636 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:42,639 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:42,641 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:42,643 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:43:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:42,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:42,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2020-12-21 22:43:42,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068312205] [2020-12-21 22:43:42,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 22:43:42,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:42,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 22:43:42,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2020-12-21 22:43:42,691 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 31 states. [2020-12-21 22:43:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:43,581 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-12-21 22:43:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:43:43,581 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-12-21 22:43:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:43,582 INFO L225 Difference]: With dead ends: 59 [2020-12-21 22:43:43,582 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:43:43,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:43:43,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:43:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-21 22:43:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:43:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-12-21 22:43:43,591 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2020-12-21 22:43:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:43,592 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-12-21 22:43:43,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 22:43:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-12-21 22:43:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 22:43:43,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:43,593 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:43,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:43:43,809 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:43,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1080336719, now seen corresponding path program 3 times [2020-12-21 22:43:43,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:43,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451698334] [2020-12-21 22:43:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 22:43:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451698334] [2020-12-21 22:43:43,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346190080] [2020-12-21 22:43:43,900 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 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 [2020-12-21 22:43:43,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-21 22:43:43,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:43:44,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 22:43:44,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:44,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-21 22:43:44,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604738379] [2020-12-21 22:43:44,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:43:44,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:44,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:43:44,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:43:44,127 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 17 states. [2020-12-21 22:43:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:44,208 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-12-21 22:43:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:43:44,209 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-12-21 22:43:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:44,210 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:43:44,210 INFO L226 Difference]: Without dead ends: 60 [2020-12-21 22:43:44,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:43:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-21 22:43:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2020-12-21 22:43:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 22:43:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-12-21 22:43:44,219 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-12-21 22:43:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:44,219 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-12-21 22:43:44,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:43:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-12-21 22:43:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 22:43:44,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:44,220 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:44,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:44,435 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:44,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:44,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 7 times [2020-12-21 22:43:44,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:44,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627619432] [2020-12-21 22:43:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:44,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627619432] [2020-12-21 22:43:44,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787756752] [2020-12-21 22:43:44,794 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 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 [2020-12-21 22:43:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:44,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 22:43:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:44,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:44,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:44,939 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:44,940 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:44,941 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:43:45,017 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:45,017 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:43:45,019 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:45,021 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:45,049 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:43:45,052 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:43:45,052 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:43:45,236 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:45,238 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:45,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:45,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 25 [2020-12-21 22:43:45,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830167897] [2020-12-21 22:43:45,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 22:43:45,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:45,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 22:43:45,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:43:45,278 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 25 states. [2020-12-21 22:43:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:46,199 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-21 22:43:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:43:46,200 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2020-12-21 22:43:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:46,200 INFO L225 Difference]: With dead ends: 50 [2020-12-21 22:43:46,201 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 22:43:46,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:43:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 22:43:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-12-21 22:43:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:43:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-12-21 22:43:46,211 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2020-12-21 22:43:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:46,212 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-12-21 22:43:46,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 22:43:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-12-21 22:43:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-21 22:43:46,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:46,213 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:46,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:43:46,427 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1086466440, now seen corresponding path program 8 times [2020-12-21 22:43:46,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:46,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757244064] [2020-12-21 22:43:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:46,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757244064] [2020-12-21 22:43:46,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850203188] [2020-12-21 22:43:46,946 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 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 [2020-12-21 22:43:47,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:43:47,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 22:43:47,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:47,399 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:47,400 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:47,411 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:47,412 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:47,412 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-21 22:43:48,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:48,008 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:48,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:48,013 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:48,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:43:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:48,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:48,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2020-12-21 22:43:48,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531941563] [2020-12-21 22:43:48,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:43:48,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:48,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:43:48,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:43:48,069 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 37 states. [2020-12-21 22:43:49,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:49,528 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-12-21 22:43:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:43:49,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-12-21 22:43:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:49,529 INFO L225 Difference]: With dead ends: 70 [2020-12-21 22:43:49,529 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 22:43:49,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 22:43:49,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 22:43:49,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-21 22:43:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:43:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-21 22:43:49,538 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-12-21 22:43:49,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:49,539 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-21 22:43:49,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:43:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-21 22:43:49,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-21 22:43:49,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:49,540 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:49,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:49,752 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:49,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1187871967, now seen corresponding path program 4 times [2020-12-21 22:43:49,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:49,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505207757] [2020-12-21 22:43:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 22:43:49,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505207757] [2020-12-21 22:43:49,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305311142] [2020-12-21 22:43:49,868 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 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 [2020-12-21 22:43:49,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:43:49,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:49,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 22:43:49,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:50,173 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:50,174 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:50,181 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:50,182 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:50,182 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-21 22:43:50,256 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:50,256 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-21 22:43:50,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:50,260 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:50,279 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-21 22:43:50,282 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:50,282 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:43:50,581 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:50,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:50,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:50,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22] total 31 [2020-12-21 22:43:50,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066894698] [2020-12-21 22:43:50,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 22:43:50,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 22:43:50,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-12-21 22:43:50,635 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 31 states. [2020-12-21 22:43:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:52,466 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-12-21 22:43:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 22:43:52,467 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2020-12-21 22:43:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:52,468 INFO L225 Difference]: With dead ends: 106 [2020-12-21 22:43:52,468 INFO L226 Difference]: Without dead ends: 85 [2020-12-21 22:43:52,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=439, Invalid=3721, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 22:43:52,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-21 22:43:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2020-12-21 22:43:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 22:43:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-12-21 22:43:52,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2020-12-21 22:43:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:52,479 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-12-21 22:43:52,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 22:43:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-12-21 22:43:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 22:43:52,480 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:52,480 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:52,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:52,694 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:52,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash -707076540, now seen corresponding path program 9 times [2020-12-21 22:43:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:52,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170810397] [2020-12-21 22:43:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 24 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:53,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170810397] [2020-12-21 22:43:53,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602602106] [2020-12-21 22:43:53,338 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 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 [2020-12-21 22:43:53,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 22:43:53,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:53,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 22:43:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:53,959 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:53,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:53,967 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:53,968 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:53,968 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-21 22:43:54,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:54,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:54,719 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:54,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:43:54,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:43:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 41 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:54,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:54,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 43 [2020-12-21 22:43:54,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723535658] [2020-12-21 22:43:54,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 22:43:54,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 22:43:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 22:43:54,792 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 43 states. [2020-12-21 22:43:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:56,634 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-12-21 22:43:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 22:43:56,635 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2020-12-21 22:43:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:56,636 INFO L225 Difference]: With dead ends: 81 [2020-12-21 22:43:56,636 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 22:43:56,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=354, Invalid=2616, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 22:43:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 22:43:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-21 22:43:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 22:43:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-12-21 22:43:56,647 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-12-21 22:43:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:56,647 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-12-21 22:43:56,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 22:43:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-12-21 22:43:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:43:56,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:56,648 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:56,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:43:56,862 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:56,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1660279261, now seen corresponding path program 5 times [2020-12-21 22:43:56,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:56,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427062450] [2020-12-21 22:43:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 22:43:56,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427062450] [2020-12-21 22:43:56,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271276643] [2020-12-21 22:43:56,984 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 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 [2020-12-21 22:43:57,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-21 22:43:57,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:43:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 22:43:57,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:57,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-21 22:43:57,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705424781] [2020-12-21 22:43:57,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 22:43:57,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:57,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 22:43:57,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:43:57,310 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2020-12-21 22:43:57,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:43:57,431 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-12-21 22:43:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:43:57,431 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-12-21 22:43:57,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:43:57,432 INFO L225 Difference]: With dead ends: 107 [2020-12-21 22:43:57,432 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 22:43:57,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:43:57,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 22:43:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-12-21 22:43:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-21 22:43:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-12-21 22:43:57,442 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-12-21 22:43:57,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:43:57,443 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-12-21 22:43:57,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 22:43:57,443 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-12-21 22:43:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 22:43:57,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:43:57,444 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-21 22:43:57,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:43:57,655 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:43:57,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:43:57,656 INFO L82 PathProgramCache]: Analyzing trace with hash -988666754, now seen corresponding path program 10 times [2020-12-21 22:43:57,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:43:57,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111496075] [2020-12-21 22:43:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:43:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:43:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:58,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111496075] [2020-12-21 22:43:58,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848083793] [2020-12-21 22:43:58,274 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 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 [2020-12-21 22:43:58,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:43:58,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:43:58,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 22:43:58,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:43:58,418 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:43:58,419 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:58,427 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:58,429 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:43:58,429 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:43:58,518 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:43:58,519 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:43:58,522 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:58,523 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:43:58,558 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:43:58,560 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:43:58,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:43:58,926 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:58,929 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:43:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:43:58,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:43:58,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 33 [2020-12-21 22:43:58,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129782133] [2020-12-21 22:43:58,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 22:43:58,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:43:58,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 22:43:58,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 22:43:58,986 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 33 states. [2020-12-21 22:44:00,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:00,445 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-12-21 22:44:00,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:44:00,445 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2020-12-21 22:44:00,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:00,446 INFO L225 Difference]: With dead ends: 64 [2020-12-21 22:44:00,446 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 22:44:00,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=236, Invalid=2214, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:44:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 22:44:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-12-21 22:44:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 22:44:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-12-21 22:44:00,457 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-12-21 22:44:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:00,458 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-12-21 22:44:00,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 22:44:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-12-21 22:44:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:44:00,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:00,459 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:00,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:44:00,673 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash -147752396, now seen corresponding path program 11 times [2020-12-21 22:44:00,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:00,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816690782] [2020-12-21 22:44:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 40 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:01,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816690782] [2020-12-21 22:44:01,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202058385] [2020-12-21 22:44:01,547 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 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 [2020-12-21 22:44:01,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-21 22:44:01,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:01,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 22:44:01,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:02,340 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-21 22:44:02,341 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:02,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:02,346 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:02,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-21 22:44:03,019 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:03,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:03,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:03,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2020-12-21 22:44:03,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770399580] [2020-12-21 22:44:03,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 22:44:03,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:03,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 22:44:03,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2274, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:44:03,097 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 50 states. [2020-12-21 22:44:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:05,385 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2020-12-21 22:44:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 22:44:05,386 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 56 [2020-12-21 22:44:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:05,387 INFO L225 Difference]: With dead ends: 96 [2020-12-21 22:44:05,387 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 22:44:05,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=372, Invalid=4320, Unknown=0, NotChecked=0, Total=4692 [2020-12-21 22:44:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 22:44:05,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-21 22:44:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-21 22:44:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-12-21 22:44:05,397 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2020-12-21 22:44:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:05,398 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-12-21 22:44:05,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 22:44:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-12-21 22:44:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:44:05,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:05,399 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:05,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 22:44:05,613 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:05,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:05,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1103207117, now seen corresponding path program 6 times [2020-12-21 22:44:05,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:05,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838374596] [2020-12-21 22:44:05,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 22:44:05,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838374596] [2020-12-21 22:44:05,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480896680] [2020-12-21 22:44:05,768 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 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 [2020-12-21 22:44:05,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-21 22:44:05,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:05,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:44:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 22:44:06,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:06,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-21 22:44:06,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861366045] [2020-12-21 22:44:06,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 22:44:06,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:06,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 22:44:06,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:44:06,227 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 23 states. [2020-12-21 22:44:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:06,361 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-12-21 22:44:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:44:06,362 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2020-12-21 22:44:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:06,363 INFO L225 Difference]: With dead ends: 122 [2020-12-21 22:44:06,363 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 22:44:06,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:44:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 22:44:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-12-21 22:44:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 22:44:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-21 22:44:06,373 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2020-12-21 22:44:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:06,374 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-21 22:44:06,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 22:44:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-21 22:44:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 22:44:06,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:06,375 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:06,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:44:06,589 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash -412901702, now seen corresponding path program 12 times [2020-12-21 22:44:06,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:06,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157251063] [2020-12-21 22:44:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:07,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157251063] [2020-12-21 22:44:07,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043878828] [2020-12-21 22:44:07,312 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 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 [2020-12-21 22:44:07,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-21 22:44:07,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-21 22:44:07,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:07,942 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:44:07,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:07,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:07,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:07,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-21 22:44:08,096 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:08,097 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 56 [2020-12-21 22:44:08,101 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:08,103 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:08,125 INFO L625 ElimStorePlain]: treesize reduction 22, result has 54.2 percent of original size [2020-12-21 22:44:08,126 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:08,126 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2020-12-21 22:44:08,315 INFO L348 Elim1Store]: treesize reduction 12, result has 86.8 percent of original size [2020-12-21 22:44:08,316 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 95 [2020-12-21 22:44:08,318 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:08,320 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:08,322 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:08,351 INFO L625 ElimStorePlain]: treesize reduction 43, result has 42.7 percent of original size [2020-12-21 22:44:08,353 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:08,353 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:21 [2020-12-21 22:44:08,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:09,217 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:09,228 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:44:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:09,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:09,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2020-12-21 22:44:09,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946776123] [2020-12-21 22:44:09,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 22:44:09,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:09,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 22:44:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2314, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:44:09,308 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 50 states. [2020-12-21 22:44:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:12,176 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-12-21 22:44:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 22:44:12,176 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 59 [2020-12-21 22:44:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:12,177 INFO L225 Difference]: With dead ends: 71 [2020-12-21 22:44:12,177 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 22:44:12,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=337, Invalid=4493, Unknown=0, NotChecked=0, Total=4830 [2020-12-21 22:44:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 22:44:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-12-21 22:44:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:44:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-21 22:44:12,186 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-12-21 22:44:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:12,186 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-21 22:44:12,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 22:44:12,186 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-21 22:44:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 22:44:12,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:12,187 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:12,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:44:12,388 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:12,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:12,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1132689008, now seen corresponding path program 13 times [2020-12-21 22:44:12,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:12,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509772674] [2020-12-21 22:44:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 60 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:13,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509772674] [2020-12-21 22:44:13,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584904180] [2020-12-21 22:44:13,404 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 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 [2020-12-21 22:44:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-21 22:44:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:14,394 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-21 22:44:14,395 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:14,401 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:14,402 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:14,402 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-21 22:44:15,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:15,290 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:15,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:15,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 56 [2020-12-21 22:44:15,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803511203] [2020-12-21 22:44:15,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-21 22:44:15,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-21 22:44:15,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2878, Unknown=0, NotChecked=0, Total=3080 [2020-12-21 22:44:15,374 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 56 states. [2020-12-21 22:44:18,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:18,274 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2020-12-21 22:44:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 22:44:18,275 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2020-12-21 22:44:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:18,276 INFO L225 Difference]: With dead ends: 107 [2020-12-21 22:44:18,276 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 22:44:18,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=424, Invalid=5428, Unknown=0, NotChecked=0, Total=5852 [2020-12-21 22:44:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 22:44:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-21 22:44:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-21 22:44:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-12-21 22:44:18,288 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-12-21 22:44:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:18,289 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-12-21 22:44:18,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-21 22:44:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-12-21 22:44:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 22:44:18,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:18,289 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:18,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:44:18,504 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1692837623, now seen corresponding path program 7 times [2020-12-21 22:44:18,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:18,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702014487] [2020-12-21 22:44:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 22:44:18,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702014487] [2020-12-21 22:44:18,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421787606] [2020-12-21 22:44:18,693 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 [2020-12-21 22:44:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:44:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-12-21 22:44:19,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:19,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-21 22:44:19,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477897904] [2020-12-21 22:44:19,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 22:44:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 22:44:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:44:19,057 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 25 states. [2020-12-21 22:44:19,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:19,201 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2020-12-21 22:44:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:44:19,202 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2020-12-21 22:44:19,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:19,203 INFO L225 Difference]: With dead ends: 137 [2020-12-21 22:44:19,203 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:44:19,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:44:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:44:19,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-12-21 22:44:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-21 22:44:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-12-21 22:44:19,215 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-12-21 22:44:19,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:19,215 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-12-21 22:44:19,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 22:44:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-12-21 22:44:19,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 22:44:19,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:19,216 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:19,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:44:19,431 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:19,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash 557731626, now seen corresponding path program 14 times [2020-12-21 22:44:19,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:19,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477588532] [2020-12-21 22:44:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:20,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477588532] [2020-12-21 22:44:20,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958512379] [2020-12-21 22:44:20,386 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 [2020-12-21 22:44:20,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:44:20,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-21 22:44:20,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:20,550 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:44:20,551 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:20,563 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:20,564 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:20,564 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:44:20,676 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:20,677 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:44:20,680 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:20,681 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:20,718 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:44:20,720 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:44:20,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:44:21,326 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:21,327 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:21,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:21,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 41 [2020-12-21 22:44:21,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304626176] [2020-12-21 22:44:21,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 22:44:21,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 22:44:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1531, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 22:44:21,402 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 41 states. [2020-12-21 22:44:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:23,767 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-12-21 22:44:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 22:44:23,770 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2020-12-21 22:44:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:23,771 INFO L225 Difference]: With dead ends: 78 [2020-12-21 22:44:23,771 INFO L226 Difference]: Without dead ends: 76 [2020-12-21 22:44:23,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=292, Invalid=3490, Unknown=0, NotChecked=0, Total=3782 [2020-12-21 22:44:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-21 22:44:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-12-21 22:44:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 22:44:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-12-21 22:44:23,783 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2020-12-21 22:44:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:23,783 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-12-21 22:44:23,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 22:44:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-12-21 22:44:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 22:44:23,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:23,784 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:23,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:44:23,985 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:23,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1229951264, now seen corresponding path program 15 times [2020-12-21 22:44:23,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:23,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60386321] [2020-12-21 22:44:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 84 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:25,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60386321] [2020-12-21 22:44:25,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601703900] [2020-12-21 22:44:25,290 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 [2020-12-21 22:44:25,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-21 22:44:25,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:25,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-21 22:44:25,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:26,653 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:44:26,654 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:26,671 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:26,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:26,672 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-21 22:44:28,207 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:28,209 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:44:28,210 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:28,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:44:28,213 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:44:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 116 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:28,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:28,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 61 [2020-12-21 22:44:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519142374] [2020-12-21 22:44:28,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-21 22:44:28,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:28,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-21 22:44:28,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3348, Unknown=0, NotChecked=0, Total=3660 [2020-12-21 22:44:28,322 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 61 states. [2020-12-21 22:44:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:31,587 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-12-21 22:44:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:44:31,588 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 70 [2020-12-21 22:44:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:31,589 INFO L225 Difference]: With dead ends: 114 [2020-12-21 22:44:31,589 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:44:31,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=594, Invalid=5106, Unknown=0, NotChecked=0, Total=5700 [2020-12-21 22:44:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:44:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-21 22:44:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 22:44:31,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-21 22:44:31,599 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-12-21 22:44:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:31,599 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-21 22:44:31,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-21 22:44:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-21 22:44:31,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 22:44:31,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:31,600 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:31,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:44:31,803 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:31,804 INFO L82 PathProgramCache]: Analyzing trace with hash 832919161, now seen corresponding path program 8 times [2020-12-21 22:44:31,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:31,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356125539] [2020-12-21 22:44:31,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 22:44:32,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356125539] [2020-12-21 22:44:32,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982360939] [2020-12-21 22:44:32,015 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 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 [2020-12-21 22:44:32,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:44:32,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:32,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:44:32,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-12-21 22:44:32,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:32,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-21 22:44:32,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927519667] [2020-12-21 22:44:32,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:44:32,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:32,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:44:32,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:44:32,522 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 27 states. [2020-12-21 22:44:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:32,713 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2020-12-21 22:44:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:44:32,714 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2020-12-21 22:44:32,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:32,715 INFO L225 Difference]: With dead ends: 152 [2020-12-21 22:44:32,715 INFO L226 Difference]: Without dead ends: 115 [2020-12-21 22:44:32,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:44:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-21 22:44:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2020-12-21 22:44:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 22:44:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-12-21 22:44:32,729 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-12-21 22:44:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:32,729 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-12-21 22:44:32,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:44:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-12-21 22:44:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 22:44:32,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:32,730 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:32,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:44:32,943 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:32,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1261252838, now seen corresponding path program 16 times [2020-12-21 22:44:32,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:32,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393500574] [2020-12-21 22:44:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:34,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393500574] [2020-12-21 22:44:34,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648501657] [2020-12-21 22:44:34,117 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 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 [2020-12-21 22:44:34,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:44:34,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:34,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-21 22:44:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:34,279 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:44:34,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:34,290 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:34,292 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:34,292 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:44:34,425 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:34,425 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:44:34,427 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:34,429 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:34,466 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:44:34,469 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:44:34,470 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:44:35,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:35,244 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:35,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:35,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 45 [2020-12-21 22:44:35,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556278688] [2020-12-21 22:44:35,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 22:44:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 22:44:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1860, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 22:44:35,332 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 45 states. [2020-12-21 22:44:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:38,262 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-12-21 22:44:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 22:44:38,263 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 73 [2020-12-21 22:44:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:38,264 INFO L225 Difference]: With dead ends: 85 [2020-12-21 22:44:38,264 INFO L226 Difference]: Without dead ends: 83 [2020-12-21 22:44:38,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=320, Invalid=4236, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 22:44:38,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-21 22:44:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-12-21 22:44:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 22:44:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-21 22:44:38,276 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-12-21 22:44:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:38,277 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-21 22:44:38,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 22:44:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-21 22:44:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 22:44:38,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:38,278 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:38,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-21 22:44:38,493 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:38,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1499458916, now seen corresponding path program 17 times [2020-12-21 22:44:38,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:38,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223957416] [2020-12-21 22:44:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 112 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223957416] [2020-12-21 22:44:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110428511] [2020-12-21 22:44:40,246 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 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 [2020-12-21 22:44:40,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 22:44:40,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:40,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-21 22:44:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:41,966 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-21 22:44:41,968 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:41,974 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:41,975 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:41,976 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-21 22:44:43,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:43,313 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:43,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:43,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 68 [2020-12-21 22:44:43,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283586257] [2020-12-21 22:44:43,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-21 22:44:43,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:43,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-21 22:44:43,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=4299, Unknown=0, NotChecked=0, Total=4556 [2020-12-21 22:44:43,426 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 68 states. [2020-12-21 22:44:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:47,768 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2020-12-21 22:44:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 22:44:47,769 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 77 [2020-12-21 22:44:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:47,770 INFO L225 Difference]: With dead ends: 129 [2020-12-21 22:44:47,770 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 22:44:47,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=546, Invalid=8010, Unknown=0, NotChecked=0, Total=8556 [2020-12-21 22:44:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 22:44:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-21 22:44:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 22:44:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-12-21 22:44:47,783 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2020-12-21 22:44:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:47,783 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-12-21 22:44:47,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-21 22:44:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-12-21 22:44:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:44:47,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:47,785 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:48,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:44:48,001 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:48,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1604461515, now seen corresponding path program 9 times [2020-12-21 22:44:48,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:48,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560449098] [2020-12-21 22:44:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 22:44:48,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560449098] [2020-12-21 22:44:48,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361953288] [2020-12-21 22:44:48,277 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 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 [2020-12-21 22:44:48,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-12-21 22:44:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:44:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-12-21 22:44:48,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:48,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-21 22:44:48,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132586338] [2020-12-21 22:44:48,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 22:44:48,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 22:44:48,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:44:48,884 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 29 states. [2020-12-21 22:44:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:49,095 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2020-12-21 22:44:49,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:44:49,096 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-12-21 22:44:49,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:49,097 INFO L225 Difference]: With dead ends: 167 [2020-12-21 22:44:49,097 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:44:49,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:44:49,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:44:49,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 83. [2020-12-21 22:44:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 22:44:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-12-21 22:44:49,110 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 79 [2020-12-21 22:44:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:49,110 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-12-21 22:44:49,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 22:44:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-12-21 22:44:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-21 22:44:49,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:49,111 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:49,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 22:44:49,312 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1642864086, now seen corresponding path program 18 times [2020-12-21 22:44:49,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:49,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063980627] [2020-12-21 22:44:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:50,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063980627] [2020-12-21 22:44:50,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130332991] [2020-12-21 22:44:50,760 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 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 [2020-12-21 22:44:51,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:44:51,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:44:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-21 22:44:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:44:51,167 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:44:51,169 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:51,180 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:51,181 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:44:51,181 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:44:51,318 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:44:51,318 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:44:51,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:51,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:44:51,357 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:44:51,359 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:44:51,359 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:44:52,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:52,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:44:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:52,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:44:52,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 49 [2020-12-21 22:44:52,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667074097] [2020-12-21 22:44:52,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 22:44:52,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:44:52,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 22:44:52,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2220, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 22:44:52,395 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 49 states. [2020-12-21 22:44:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:44:56,019 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-12-21 22:44:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 22:44:56,020 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 80 [2020-12-21 22:44:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:44:56,021 INFO L225 Difference]: With dead ends: 92 [2020-12-21 22:44:56,021 INFO L226 Difference]: Without dead ends: 90 [2020-12-21 22:44:56,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=351, Invalid=5051, Unknown=0, NotChecked=0, Total=5402 [2020-12-21 22:44:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-21 22:44:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-12-21 22:44:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 22:44:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-12-21 22:44:56,039 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 80 [2020-12-21 22:44:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:44:56,039 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-12-21 22:44:56,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 22:44:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-12-21 22:44:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-21 22:44:56,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:44:56,040 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-21 22:44:56,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 22:44:56,254 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:44:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:44:56,255 INFO L82 PathProgramCache]: Analyzing trace with hash 960432012, now seen corresponding path program 19 times [2020-12-21 22:44:56,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:44:56,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437769494] [2020-12-21 22:44:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:44:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 144 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:44:58,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437769494] [2020-12-21 22:44:58,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203745658] [2020-12-21 22:44:58,250 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 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 [2020-12-21 22:44:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:44:58,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-21 22:44:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:00,183 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-21 22:45:00,184 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:00,192 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:00,193 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:00,193 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-21 22:45:01,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:01,739 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:01,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:01,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 74 [2020-12-21 22:45:01,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428370446] [2020-12-21 22:45:01,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-21 22:45:01,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:01,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-21 22:45:01,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=5116, Unknown=0, NotChecked=0, Total=5402 [2020-12-21 22:45:01,860 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 74 states. [2020-12-21 22:45:07,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:07,070 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-12-21 22:45:07,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 22:45:07,071 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 84 [2020-12-21 22:45:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:07,073 INFO L225 Difference]: With dead ends: 140 [2020-12-21 22:45:07,073 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 22:45:07,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=607, Invalid=9493, Unknown=0, NotChecked=0, Total=10100 [2020-12-21 22:45:07,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 22:45:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-12-21 22:45:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 22:45:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-21 22:45:07,091 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-12-21 22:45:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:07,091 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-21 22:45:07,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-21 22:45:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-21 22:45:07,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:45:07,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:07,092 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:07,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 22:45:07,306 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:07,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1155380773, now seen corresponding path program 10 times [2020-12-21 22:45:07,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:07,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010881756] [2020-12-21 22:45:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-21 22:45:07,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010881756] [2020-12-21 22:45:07,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553014531] [2020-12-21 22:45:07,605 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 [2020-12-21 22:45:07,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:45:07,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:07,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-21 22:45:07,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:08,610 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:45:08,611 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:08,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:08,620 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:08,620 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-21 22:45:08,777 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:08,778 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-21 22:45:08,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:08,781 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:08,808 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-21 22:45:08,810 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:08,810 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:45:09,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:09,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 0 proven. 447 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:10,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:10,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 40] total 55 [2020-12-21 22:45:10,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090816410] [2020-12-21 22:45:10,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 22:45:10,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 22:45:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2746, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 22:45:10,004 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 55 states. [2020-12-21 22:45:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:15,496 INFO L93 Difference]: Finished difference Result 196 states and 202 transitions. [2020-12-21 22:45:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-21 22:45:15,497 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 86 [2020-12-21 22:45:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:15,498 INFO L225 Difference]: With dead ends: 196 [2020-12-21 22:45:15,498 INFO L226 Difference]: Without dead ends: 151 [2020-12-21 22:45:15,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=856, Invalid=11800, Unknown=0, NotChecked=0, Total=12656 [2020-12-21 22:45:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-21 22:45:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 94. [2020-12-21 22:45:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 22:45:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-12-21 22:45:15,514 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 86 [2020-12-21 22:45:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:15,514 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-12-21 22:45:15,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-21 22:45:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-12-21 22:45:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 22:45:15,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:15,515 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:15,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 22:45:15,715 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:15,716 INFO L82 PathProgramCache]: Analyzing trace with hash -762793272, now seen corresponding path program 20 times [2020-12-21 22:45:15,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:15,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377436869] [2020-12-21 22:45:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 180 proven. 322 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:18,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377436869] [2020-12-21 22:45:18,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053276703] [2020-12-21 22:45:18,089 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 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 [2020-12-21 22:45:18,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:45:18,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-21 22:45:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:20,278 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:45:20,279 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:20,289 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:20,294 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:20,295 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-21 22:45:22,383 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:22,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:45:22,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:22,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:45:22,396 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:45:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 221 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:22,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:22,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2020-12-21 22:45:22,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928418982] [2020-12-21 22:45:22,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-21 22:45:22,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:22,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-21 22:45:22,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=6201, Unknown=0, NotChecked=0, Total=6642 [2020-12-21 22:45:22,520 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 82 states. [2020-12-21 22:45:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:28,117 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2020-12-21 22:45:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-21 22:45:28,118 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 91 [2020-12-21 22:45:28,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:28,119 INFO L225 Difference]: With dead ends: 146 [2020-12-21 22:45:28,119 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 22:45:28,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1021, Invalid=10109, Unknown=0, NotChecked=0, Total=11130 [2020-12-21 22:45:28,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 22:45:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-21 22:45:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-21 22:45:28,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-12-21 22:45:28,132 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 91 [2020-12-21 22:45:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:28,132 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-12-21 22:45:28,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-21 22:45:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-12-21 22:45:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 22:45:28,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:28,133 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:28,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 22:45:28,348 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1377526625, now seen corresponding path program 11 times [2020-12-21 22:45:28,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:28,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215128117] [2020-12-21 22:45:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-21 22:45:28,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215128117] [2020-12-21 22:45:28,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942269132] [2020-12-21 22:45:28,686 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 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 [2020-12-21 22:45:29,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-21 22:45:29,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:29,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:45:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-21 22:45:29,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:29,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2020-12-21 22:45:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630243647] [2020-12-21 22:45:29,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 22:45:29,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:29,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 22:45:29,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 22:45:29,548 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 33 states. [2020-12-21 22:45:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:29,803 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2020-12-21 22:45:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:45:29,804 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 93 [2020-12-21 22:45:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:29,809 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:45:29,810 INFO L226 Difference]: Without dead ends: 148 [2020-12-21 22:45:29,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 22:45:29,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-21 22:45:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 97. [2020-12-21 22:45:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-21 22:45:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2020-12-21 22:45:29,830 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 93 [2020-12-21 22:45:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:29,830 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2020-12-21 22:45:29,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 22:45:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2020-12-21 22:45:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-21 22:45:29,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:29,831 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:30,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 22:45:30,046 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:30,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:30,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1575251838, now seen corresponding path program 21 times [2020-12-21 22:45:30,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:30,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232762992] [2020-12-21 22:45:30,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:32,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232762992] [2020-12-21 22:45:32,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665907355] [2020-12-21 22:45:32,581 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 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 [2020-12-21 22:45:33,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-21 22:45:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:33,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-21 22:45:33,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:33,924 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:45:33,926 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:33,938 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:33,939 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:33,939 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-21 22:45:34,183 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:34,183 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 56 [2020-12-21 22:45:34,185 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:34,187 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:34,218 INFO L625 ElimStorePlain]: treesize reduction 22, result has 54.2 percent of original size [2020-12-21 22:45:34,219 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:34,219 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2020-12-21 22:45:34,537 INFO L348 Elim1Store]: treesize reduction 12, result has 86.8 percent of original size [2020-12-21 22:45:34,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 95 [2020-12-21 22:45:34,540 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:34,541 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:34,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:34,544 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:34,576 INFO L625 ElimStorePlain]: treesize reduction 43, result has 42.7 percent of original size [2020-12-21 22:45:34,578 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:34,579 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:21 [2020-12-21 22:45:36,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:36,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:36,946 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-21 22:45:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 543 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:37,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:37,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 35] total 76 [2020-12-21 22:45:37,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883438677] [2020-12-21 22:45:37,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-21 22:45:37,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:37,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-21 22:45:37,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5480, Unknown=0, NotChecked=0, Total=5700 [2020-12-21 22:45:37,085 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 76 states. [2020-12-21 22:45:45,587 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-21 22:45:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:45:46,821 INFO L93 Difference]: Finished difference Result 215 states and 221 transitions. [2020-12-21 22:45:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-21 22:45:46,822 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 94 [2020-12-21 22:45:46,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:45:46,823 INFO L225 Difference]: With dead ends: 215 [2020-12-21 22:45:46,824 INFO L226 Difference]: Without dead ends: 213 [2020-12-21 22:45:46,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3667 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=679, Invalid=14573, Unknown=0, NotChecked=0, Total=15252 [2020-12-21 22:45:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-21 22:45:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 106. [2020-12-21 22:45:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 22:45:46,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-12-21 22:45:46,849 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 94 [2020-12-21 22:45:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:45:46,849 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-12-21 22:45:46,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-21 22:45:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-12-21 22:45:46,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-21 22:45:46,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:45:46,850 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-21 22:45:47,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 22:45:47,063 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:45:47,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:45:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash 433931320, now seen corresponding path program 22 times [2020-12-21 22:45:47,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:45:47,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532516767] [2020-12-21 22:45:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:45:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:45:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 220 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:49,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532516767] [2020-12-21 22:45:49,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272168964] [2020-12-21 22:45:49,971 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 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 [2020-12-21 22:45:50,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:45:50,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:45:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-21 22:45:50,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:45:52,803 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-21 22:45:52,804 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:45:52,811 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:45:52,812 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:45:52,812 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-21 22:45:55,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:55,223 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:45:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 589 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:45:55,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:45:55,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 86 [2020-12-21 22:45:55,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053438735] [2020-12-21 22:45:55,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-21 22:45:55,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:45:55,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-21 22:45:55,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=6963, Unknown=0, NotChecked=0, Total=7310 [2020-12-21 22:45:55,413 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 86 states. [2020-12-21 22:46:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:03,817 INFO L93 Difference]: Finished difference Result 166 states and 172 transitions. [2020-12-21 22:46:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-21 22:46:03,819 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 98 [2020-12-21 22:46:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:03,820 INFO L225 Difference]: With dead ends: 166 [2020-12-21 22:46:03,820 INFO L226 Difference]: Without dead ends: 107 [2020-12-21 22:46:03,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=744, Invalid=12828, Unknown=0, NotChecked=0, Total=13572 [2020-12-21 22:46:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-21 22:46:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-12-21 22:46:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 22:46:03,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2020-12-21 22:46:03,843 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 98 [2020-12-21 22:46:03,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:03,843 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2020-12-21 22:46:03,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-21 22:46:03,843 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2020-12-21 22:46:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 22:46:03,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:03,844 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:04,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:04,054 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash 8544545, now seen corresponding path program 12 times [2020-12-21 22:46:04,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:04,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898416236] [2020-12-21 22:46:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-21 22:46:04,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898416236] [2020-12-21 22:46:04,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655577808] [2020-12-21 22:46:04,523 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 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 [2020-12-21 22:46:05,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 22:46:05,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:05,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:46:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-12-21 22:46:06,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:06,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2020-12-21 22:46:06,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619339994] [2020-12-21 22:46:06,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 22:46:06,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:06,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 22:46:06,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:46:06,084 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 37 states. [2020-12-21 22:46:06,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:06,374 INFO L93 Difference]: Finished difference Result 261 states and 267 transitions. [2020-12-21 22:46:06,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:46:06,376 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 99 [2020-12-21 22:46:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:06,377 INFO L225 Difference]: With dead ends: 261 [2020-12-21 22:46:06,377 INFO L226 Difference]: Without dead ends: 207 [2020-12-21 22:46:06,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 22:46:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-21 22:46:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 108. [2020-12-21 22:46:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 22:46:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2020-12-21 22:46:06,398 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 99 [2020-12-21 22:46:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:06,398 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2020-12-21 22:46:06,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 22:46:06,398 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2020-12-21 22:46:06,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-21 22:46:06,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:06,399 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:06,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:06,600 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:06,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:06,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1064023358, now seen corresponding path program 23 times [2020-12-21 22:46:06,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:06,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806020665] [2020-12-21 22:46:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 3 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:09,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806020665] [2020-12-21 22:46:09,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551707439] [2020-12-21 22:46:09,694 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 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 [2020-12-21 22:46:09,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-21 22:46:09,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:09,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-21 22:46:09,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:12,532 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:46:12,534 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:12,544 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:12,545 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:12,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2020-12-21 22:46:12,822 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:12,823 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-21 22:46:12,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:12,827 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:12,858 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-21 22:46:12,861 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:12,861 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2020-12-21 22:46:13,026 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:13,027 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-21 22:46:13,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:13,031 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:13,067 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-21 22:46:13,069 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:13,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:13 [2020-12-21 22:46:13,237 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:13,237 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2020-12-21 22:46:13,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:13,242 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:13,271 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2020-12-21 22:46:13,274 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:13,274 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:46:15,038 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:15,041 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 634 backedges. 7 proven. 627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:15,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:15,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2020-12-21 22:46:15,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13554715] [2020-12-21 22:46:15,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-21 22:46:15,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-21 22:46:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=7354, Unknown=0, NotChecked=0, Total=7656 [2020-12-21 22:46:15,185 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand 88 states. [2020-12-21 22:46:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:24,813 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2020-12-21 22:46:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-21 22:46:24,815 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 100 [2020-12-21 22:46:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:24,816 INFO L225 Difference]: With dead ends: 159 [2020-12-21 22:46:24,816 INFO L226 Difference]: Without dead ends: 157 [2020-12-21 22:46:24,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=738, Invalid=13068, Unknown=0, NotChecked=0, Total=13806 [2020-12-21 22:46:24,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-21 22:46:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2020-12-21 22:46:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 22:46:24,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-12-21 22:46:24,842 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-12-21 22:46:24,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:24,843 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-12-21 22:46:24,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-21 22:46:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-12-21 22:46:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:46:24,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:24,844 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:25,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:46:25,058 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:25,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:25,059 INFO L82 PathProgramCache]: Analyzing trace with hash -547200706, now seen corresponding path program 24 times [2020-12-21 22:46:25,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:25,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560254353] [2020-12-21 22:46:25,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:27,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560254353] [2020-12-21 22:46:27,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695562435] [2020-12-21 22:46:27,588 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 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 [2020-12-21 22:46:28,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-21 22:46:28,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:46:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-21 22:46:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:28,333 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:46:28,334 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:28,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:28,348 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:28,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:46:28,524 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:28,524 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:46:28,526 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:28,528 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:28,574 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:46:28,576 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:46:28,576 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:46:30,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:30,379 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 633 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:30,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:30,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 61 [2020-12-21 22:46:30,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36609341] [2020-12-21 22:46:30,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-21 22:46:30,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:30,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-21 22:46:30,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3495, Unknown=0, NotChecked=0, Total=3660 [2020-12-21 22:46:30,536 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 61 states. [2020-12-21 22:46:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:46:38,207 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-12-21 22:46:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-21 22:46:38,208 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 101 [2020-12-21 22:46:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:46:38,211 INFO L225 Difference]: With dead ends: 116 [2020-12-21 22:46:38,212 INFO L226 Difference]: Without dead ends: 114 [2020-12-21 22:46:38,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=435, Invalid=7937, Unknown=0, NotChecked=0, Total=8372 [2020-12-21 22:46:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-21 22:46:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-12-21 22:46:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 22:46:38,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-12-21 22:46:38,243 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 101 [2020-12-21 22:46:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:46:38,243 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-12-21 22:46:38,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-21 22:46:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-12-21 22:46:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 22:46:38,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:46:38,244 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-21 22:46:38,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-21 22:46:38,459 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:46:38,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:46:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1047177484, now seen corresponding path program 25 times [2020-12-21 22:46:38,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:46:38,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204695159] [2020-12-21 22:46:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:46:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 264 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204695159] [2020-12-21 22:46:42,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452878424] [2020-12-21 22:46:42,659 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 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 [2020-12-21 22:46:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:46:42,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-21 22:46:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:46:46,603 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-21 22:46:46,604 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:46:46,612 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:46:46,613 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:46:46,614 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:9 [2020-12-21 22:46:49,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:49,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:46:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 683 backedges. 0 proven. 683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:46:50,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:46:50,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 92 [2020-12-21 22:46:50,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089053698] [2020-12-21 22:46:50,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-21 22:46:50,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:46:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-21 22:46:50,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=7993, Unknown=0, NotChecked=0, Total=8372 [2020-12-21 22:46:50,026 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 92 states. [2020-12-21 22:47:00,415 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-21 22:47:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:00,535 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2020-12-21 22:47:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-21 22:47:00,537 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 105 [2020-12-21 22:47:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:00,539 INFO L225 Difference]: With dead ends: 174 [2020-12-21 22:47:00,539 INFO L226 Difference]: Without dead ends: 111 [2020-12-21 22:47:00,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3231 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=817, Invalid=14683, Unknown=0, NotChecked=0, Total=15500 [2020-12-21 22:47:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-21 22:47:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-12-21 22:47:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-21 22:47:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-12-21 22:47:00,564 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2020-12-21 22:47:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:00,565 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-12-21 22:47:00,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-21 22:47:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-12-21 22:47:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-21 22:47:00,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:00,565 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:00,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:00,766 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:00,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:00,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1647532242, now seen corresponding path program 26 times [2020-12-21 22:47:00,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:00,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087718524] [2020-12-21 22:47:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:04,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087718524] [2020-12-21 22:47:04,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069135931] [2020-12-21 22:47:04,434 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 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 [2020-12-21 22:47:04,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:47:04,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-21 22:47:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:04,761 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:47:04,763 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:04,780 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:04,782 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:04,782 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:18 [2020-12-21 22:47:05,044 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:05,045 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2020-12-21 22:47:05,051 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:47:05,054 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:05,116 INFO L625 ElimStorePlain]: treesize reduction 28, result has 54.8 percent of original size [2020-12-21 22:47:05,119 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:47:05,120 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:18 [2020-12-21 22:47:07,699 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:47:07,701 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:47:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:07,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 22:47:07,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 65 [2020-12-21 22:47:07,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356977949] [2020-12-21 22:47:07,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-21 22:47:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:47:07,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-21 22:47:07,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3985, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 22:47:07,881 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 65 states. [2020-12-21 22:47:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:47:18,205 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-12-21 22:47:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-21 22:47:18,207 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 108 [2020-12-21 22:47:18,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:47:18,209 INFO L225 Difference]: With dead ends: 120 [2020-12-21 22:47:18,209 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 22:47:18,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=460, Invalid=9046, Unknown=0, NotChecked=0, Total=9506 [2020-12-21 22:47:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 22:47:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2020-12-21 22:47:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 22:47:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-12-21 22:47:18,241 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2020-12-21 22:47:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:47:18,242 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-12-21 22:47:18,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-21 22:47:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-12-21 22:47:18,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-21 22:47:18,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:47:18,243 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2020-12-21 22:47:18,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:47:18,458 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:47:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:47:18,459 INFO L82 PathProgramCache]: Analyzing trace with hash 344663268, now seen corresponding path program 27 times [2020-12-21 22:47:18,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:47:18,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797187387] [2020-12-21 22:47:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:47:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:47:24,597 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 312 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:47:24,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797187387] [2020-12-21 22:47:24,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459628037] [2020-12-21 22:47:24,597 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 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 [2020-12-21 22:47:25,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-12-21 22:47:25,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:47:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-21 22:47:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:47:25,548 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-12-21 22:47:25,552 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:25,557 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:25,560 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:25,561 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2020-12-21 22:47:28,141 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-21 22:47:28,147 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:28,167 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:28,169 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:28,169 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2020-12-21 22:47:28,607 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2020-12-21 22:47:28,608 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2020-12-21 22:47:28,611 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:47:28,627 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:47:28,629 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:47:28,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28