/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/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:22:11,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:22:11,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:22:11,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:22:11,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:22:11,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:22:11,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:22:11,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:22:11,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:22:11,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:22:11,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:22:11,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:22:11,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:22:11,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:22:11,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:22:11,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:22:11,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:22:11,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:22:11,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:22:11,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:22:11,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:22:11,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:22:11,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:22:11,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:22:11,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:22:11,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:22:11,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:22:11,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:22:11,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:22:11,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:22:11,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:22:11,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:22:11,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:22:11,581 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:22:11,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:22:11,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:22:11,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:22:11,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:22:11,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:22:11,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:22:11,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:22:11,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:22:11,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:22:11,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:22:11,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:22:11,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:22:11,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:22:11,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:22:11,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:22:11,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:22:11,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:22:11,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:22:11,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:22:11,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:22:11,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:22:12,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:22:12,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:22:12,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:22:12,075 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:22:12,076 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:22:12,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_3-2.i [2020-12-22 04:22:12,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/095ac85cf/47c6514b452745e9befdcac9152f4cba/FLAGb5021de8a [2020-12-22 04:22:12,750 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:22:12,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-2.i [2020-12-22 04:22:12,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/095ac85cf/47c6514b452745e9befdcac9152f4cba/FLAGb5021de8a [2020-12-22 04:22:13,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/095ac85cf/47c6514b452745e9befdcac9152f4cba [2020-12-22 04:22:13,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:22:13,173 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:22:13,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:22:13,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:22:13,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:22:13,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22092625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13, skipping insertion in model container [2020-12-22 04:22:13,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:22:13,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:22:13,384 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/loop-acceleration/array_3-2.i[809,822] [2020-12-22 04:22:13,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:22:13,418 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:22:13,435 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/loop-acceleration/array_3-2.i[809,822] [2020-12-22 04:22:13,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:22:13,469 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:22:13,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13 WrapperNode [2020-12-22 04:22:13,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:22:13,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:22:13,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:22:13,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:22:13,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:22:13,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:22:13,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:22:13,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:22:13,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... [2020-12-22 04:22:13,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:22:13,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:22:13,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:22:13,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:22:13,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:22:13,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:22:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:22:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 04:22:13,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:22:13,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:22:13,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 04:22:13,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 04:22:14,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:22:14,020 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 04:22:14,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:22:14 BoogieIcfgContainer [2020-12-22 04:22:14,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:22:14,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:22:14,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:22:14,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:22:14,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:22:13" (1/3) ... [2020-12-22 04:22:14,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e1b1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:22:14, skipping insertion in model container [2020-12-22 04:22:14,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:22:13" (2/3) ... [2020-12-22 04:22:14,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e1b1c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:22:14, skipping insertion in model container [2020-12-22 04:22:14,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:22:14" (3/3) ... [2020-12-22 04:22:14,032 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2020-12-22 04:22:14,040 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:22:14,046 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:22:14,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:22:14,160 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:22:14,160 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:22:14,161 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:22:14,161 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:22:14,161 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:22:14,161 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:22:14,162 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:22:14,162 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:22:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 04:22:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:22:14,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:14,200 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:14,214 INFO L82 PathProgramCache]: Analyzing trace with hash 212441967, now seen corresponding path program 1 times [2020-12-22 04:22:14,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:14,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323547675] [2020-12-22 04:22:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323547675] [2020-12-22 04:22:14,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:14,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:22:14,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061740994] [2020-12-22 04:22:14,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:22:14,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:22:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:22:14,474 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 04:22:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,491 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-12-22 04:22:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:22:14,493 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-22 04:22:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,515 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:22:14,519 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:22:14,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:22:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:22:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:22:14,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:22:14,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-22 04:22:14,555 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2020-12-22 04:22:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,556 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-22 04:22:14,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:22:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-22 04:22:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:22:14,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:14,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:22:14,558 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1850569592, now seen corresponding path program 1 times [2020-12-22 04:22:14,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:14,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155267135] [2020-12-22 04:22:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155267135] [2020-12-22 04:22:14,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:14,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:22:14,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297308118] [2020-12-22 04:22:14,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:22:14,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:22:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:22:14,622 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-12-22 04:22:14,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,659 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-22 04:22:14,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:22:14,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 04:22:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,660 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:22:14,661 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:22:14,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:22:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:22:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2020-12-22 04:22:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:22:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-12-22 04:22:14,666 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-12-22 04:22:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,667 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-12-22 04:22:14,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:22:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-12-22 04:22:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:22:14,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:14,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:22:14,668 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1195372026, now seen corresponding path program 1 times [2020-12-22 04:22:14,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:14,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257971839] [2020-12-22 04:22:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257971839] [2020-12-22 04:22:14,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094023077] [2020-12-22 04:22:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:22:14,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:22:14,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:14,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:22:14,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480678202] [2020-12-22 04:22:14,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:22:14,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:22:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:14,864 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-12-22 04:22:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:14,921 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-22 04:22:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:22:14,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 04:22:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:14,922 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:22:14,923 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:22:14,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:22:14,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2020-12-22 04:22:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:22:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-22 04:22:14,928 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-12-22 04:22:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:14,929 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-22 04:22:14,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:22:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-22 04:22:14,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:22:14,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:14,930 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:15,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:22:15,146 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:15,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:15,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1384263684, now seen corresponding path program 2 times [2020-12-22 04:22:15,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:15,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488157140] [2020-12-22 04:22:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:22:15,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488157140] [2020-12-22 04:22:15,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:22:15,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 04:22:15,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858306496] [2020-12-22 04:22:15,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:22:15,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:15,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:22:15,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:22:15,281 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2020-12-22 04:22:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:15,323 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-22 04:22:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:22:15,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-22 04:22:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:15,325 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:22:15,325 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:22:15,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:22:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:22:15,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:22:15,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:22:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-22 04:22:15,334 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2020-12-22 04:22:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:15,334 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-22 04:22:15,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:22:15,335 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-22 04:22:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:22:15,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:15,336 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:15,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:22:15,336 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -219680159, now seen corresponding path program 1 times [2020-12-22 04:22:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:15,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038078982] [2020-12-22 04:22:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:22:15,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038078982] [2020-12-22 04:22:15,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786316196] [2020-12-22 04:22:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:22:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:22:15,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:15,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-22 04:22:15,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4269133] [2020-12-22 04:22:15,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:22:15,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:15,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:22:15,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:22:15,605 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-12-22 04:22:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:15,687 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-12-22 04:22:15,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:22:15,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-22 04:22:15,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:15,688 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:22:15,689 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:22:15,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:22:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-12-22 04:22:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:22:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-22 04:22:15,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2020-12-22 04:22:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:15,696 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-22 04:22:15,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:22:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-22 04:22:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:22:15,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:15,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:15,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:15,912 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash -936804819, now seen corresponding path program 2 times [2020-12-22 04:22:15,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:15,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69801143] [2020-12-22 04:22:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 04:22:15,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69801143] [2020-12-22 04:22:15,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700973244] [2020-12-22 04:22:15,991 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:16,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:16,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:16,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:22:16,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 04:22:16,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:16,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:22:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864948072] [2020-12-22 04:22:16,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:22:16,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:16,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:22:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:22:16,193 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 7 states. [2020-12-22 04:22:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:16,273 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-12-22 04:22:16,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:22:16,274 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-22 04:22:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:16,275 INFO L225 Difference]: With dead ends: 61 [2020-12-22 04:22:16,275 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:22:16,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:22:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:22:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2020-12-22 04:22:16,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:22:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-22 04:22:16,282 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 28 [2020-12-22 04:22:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:16,282 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-22 04:22:16,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:22:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-22 04:22:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:22:16,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:16,284 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:16,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:16,498 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:16,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1414063057, now seen corresponding path program 3 times [2020-12-22 04:22:16,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:16,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527468108] [2020-12-22 04:22:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 04:22:16,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527468108] [2020-12-22 04:22:16,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707628219] [2020-12-22 04:22:16,580 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 [2020-12-22 04:22:16,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:22:16,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:16,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:22:16,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:22:16,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:16,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-22 04:22:16,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646923485] [2020-12-22 04:22:16,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:22:16,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:16,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:22:16,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:16,713 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 9 states. [2020-12-22 04:22:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:16,822 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-12-22 04:22:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:22:16,822 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-12-22 04:22:16,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:16,823 INFO L225 Difference]: With dead ends: 67 [2020-12-22 04:22:16,823 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:22:16,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:22:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:22:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-12-22 04:22:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:22:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-12-22 04:22:16,830 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 30 [2020-12-22 04:22:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:16,831 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-12-22 04:22:16,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:22:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-12-22 04:22:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:22:16,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:16,833 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:17,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:17,048 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash -818329861, now seen corresponding path program 4 times [2020-12-22 04:22:17,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:17,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298582210] [2020-12-22 04:22:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:17,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298582210] [2020-12-22 04:22:17,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403334385] [2020-12-22 04:22:17,142 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:17,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:17,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:22:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:17,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:17,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:22:17,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776238408] [2020-12-22 04:22:17,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:22:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:17,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:22:17,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:17,324 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 9 states. [2020-12-22 04:22:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:17,406 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-12-22 04:22:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:22:17,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-12-22 04:22:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:17,408 INFO L225 Difference]: With dead ends: 81 [2020-12-22 04:22:17,408 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:22:17,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:22:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:22:17,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-12-22 04:22:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:22:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-22 04:22:17,415 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 40 [2020-12-22 04:22:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:17,415 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-22 04:22:17,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:22:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-22 04:22:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:22:17,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:17,416 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:17,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:17,631 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:17,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:17,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2108689923, now seen corresponding path program 5 times [2020-12-22 04:22:17,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:17,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235404571] [2020-12-22 04:22:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:17,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235404571] [2020-12-22 04:22:17,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394337036] [2020-12-22 04:22:17,757 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:17,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:22:17,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:22:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:17,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:17,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:22:17,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637815523] [2020-12-22 04:22:17,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:22:17,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:17,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:22:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:22:17,951 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 10 states. [2020-12-22 04:22:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:18,047 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2020-12-22 04:22:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:22:18,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-12-22 04:22:18,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:18,049 INFO L225 Difference]: With dead ends: 91 [2020-12-22 04:22:18,049 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 04:22:18,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:22:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 04:22:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2020-12-22 04:22:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:22:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-22 04:22:18,056 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 42 [2020-12-22 04:22:18,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:18,056 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-22 04:22:18,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:22:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-22 04:22:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:22:18,058 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:18,058 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:18,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:18,272 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash -899160961, now seen corresponding path program 6 times [2020-12-22 04:22:18,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:18,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017176646] [2020-12-22 04:22:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:18,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017176646] [2020-12-22 04:22:18,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392443872] [2020-12-22 04:22:18,399 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:18,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 04:22:18,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:18,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:22:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:18,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:18,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:22:18,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358660876] [2020-12-22 04:22:18,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:22:18,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:22:18,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:22:18,609 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 11 states. [2020-12-22 04:22:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:18,729 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-12-22 04:22:18,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:22:18,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-12-22 04:22:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:18,734 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:22:18,734 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 04:22:18,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:22:18,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 04:22:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2020-12-22 04:22:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:22:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-22 04:22:18,757 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 44 [2020-12-22 04:22:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:18,757 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-22 04:22:18,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:22:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-22 04:22:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:22:18,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:18,760 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:18,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:22:18,979 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:18,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1817001601, now seen corresponding path program 7 times [2020-12-22 04:22:18,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:18,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275734484] [2020-12-22 04:22:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:19,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275734484] [2020-12-22 04:22:19,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728251759] [2020-12-22 04:22:19,095 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:19,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:22:19,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:19,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:19,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:22:19,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433668029] [2020-12-22 04:22:19,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:22:19,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:19,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:22:19,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:22:19,245 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 12 states. [2020-12-22 04:22:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:19,350 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2020-12-22 04:22:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:22:19,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-22 04:22:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:19,351 INFO L225 Difference]: With dead ends: 111 [2020-12-22 04:22:19,352 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:22:19,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:22:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:22:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-12-22 04:22:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:22:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2020-12-22 04:22:19,364 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 46 [2020-12-22 04:22:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:19,364 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2020-12-22 04:22:19,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:22:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2020-12-22 04:22:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:22:19,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:19,366 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:19,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 04:22:19,581 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:19,582 INFO L82 PathProgramCache]: Analyzing trace with hash 709107715, now seen corresponding path program 8 times [2020-12-22 04:22:19,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:19,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018457677] [2020-12-22 04:22:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018457677] [2020-12-22 04:22:19,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646115406] [2020-12-22 04:22:19,731 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:19,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:19,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:19,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:22:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:19,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:19,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:22:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520275675] [2020-12-22 04:22:19,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:22:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:22:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:22:19,871 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 13 states. [2020-12-22 04:22:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:19,977 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2020-12-22 04:22:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:22:19,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-12-22 04:22:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:19,978 INFO L225 Difference]: With dead ends: 121 [2020-12-22 04:22:19,979 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 04:22:19,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:22:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 04:22:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 51. [2020-12-22 04:22:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:22:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-12-22 04:22:19,993 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 48 [2020-12-22 04:22:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:19,994 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-12-22 04:22:19,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:22:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-12-22 04:22:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:22:19,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:19,999 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:20,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:20,209 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:20,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1174972677, now seen corresponding path program 9 times [2020-12-22 04:22:20,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:20,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863280273] [2020-12-22 04:22:20,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 04:22:20,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863280273] [2020-12-22 04:22:20,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368325005] [2020-12-22 04:22:20,362 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:20,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:22:20,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:20,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:22:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:22:20,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:20,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2020-12-22 04:22:20,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491554854] [2020-12-22 04:22:20,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:22:20,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:20,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:22:20,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:22:20,551 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 15 states. [2020-12-22 04:22:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:20,739 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2020-12-22 04:22:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:22:20,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-12-22 04:22:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:20,742 INFO L225 Difference]: With dead ends: 119 [2020-12-22 04:22:20,742 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 04:22:20,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:22:20,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 04:22:20,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-12-22 04:22:20,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:22:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-12-22 04:22:20,757 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 50 [2020-12-22 04:22:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:20,757 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-12-22 04:22:20,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:22:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-12-22 04:22:20,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:22:20,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:20,758 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:20,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:20,972 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash 508143973, now seen corresponding path program 10 times [2020-12-22 04:22:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:20,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133692209] [2020-12-22 04:22:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:21,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133692209] [2020-12-22 04:22:21,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457989933] [2020-12-22 04:22:21,134 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:21,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:21,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:21,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:22:21,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:21,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:21,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:22:21,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461045742] [2020-12-22 04:22:21,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:22:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:22:21,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:22:21,333 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 15 states. [2020-12-22 04:22:21,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:21,482 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2020-12-22 04:22:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:22:21,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-12-22 04:22:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:21,484 INFO L225 Difference]: With dead ends: 141 [2020-12-22 04:22:21,484 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 04:22:21,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:22:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 04:22:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-12-22 04:22:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:22:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2020-12-22 04:22:21,490 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 76 [2020-12-22 04:22:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:21,491 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2020-12-22 04:22:21,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:22:21,491 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2020-12-22 04:22:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:22:21,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:21,492 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:21,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:22:21,706 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1074365593, now seen corresponding path program 11 times [2020-12-22 04:22:21,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:21,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347236822] [2020-12-22 04:22:21,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:21,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347236822] [2020-12-22 04:22:21,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089750339] [2020-12-22 04:22:21,922 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 [2020-12-22 04:22:22,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 04:22:22,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:22:22,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:22,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:22,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:22:22,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610592502] [2020-12-22 04:22:22,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:22:22,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:22,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:22:22,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:22:22,216 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 16 states. [2020-12-22 04:22:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:22,347 INFO L93 Difference]: Finished difference Result 151 states and 179 transitions. [2020-12-22 04:22:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:22:22,347 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-12-22 04:22:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:22,348 INFO L225 Difference]: With dead ends: 151 [2020-12-22 04:22:22,348 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 04:22:22,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:22:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 04:22:22,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 81. [2020-12-22 04:22:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:22:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-12-22 04:22:22,354 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 78 [2020-12-22 04:22:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:22,354 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-12-22 04:22:22,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:22:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-12-22 04:22:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:22:22,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:22,355 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:22,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:22:22,556 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:22,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1447635735, now seen corresponding path program 12 times [2020-12-22 04:22:22,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:22,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579054897] [2020-12-22 04:22:22,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:22,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579054897] [2020-12-22 04:22:22,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149080187] [2020-12-22 04:22:22,812 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 [2020-12-22 04:22:23,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-12-22 04:22:23,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:23,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:22:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:23,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:23,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:22:23,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783563714] [2020-12-22 04:22:23,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:22:23,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:23,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:22:23,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:22:23,239 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 17 states. [2020-12-22 04:22:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:23,395 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2020-12-22 04:22:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:22:23,396 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 04:22:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:23,397 INFO L225 Difference]: With dead ends: 161 [2020-12-22 04:22:23,397 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 04:22:23,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:22:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 04:22:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2020-12-22 04:22:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:22:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-12-22 04:22:23,403 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 80 [2020-12-22 04:22:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:23,403 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-12-22 04:22:23,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:22:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-12-22 04:22:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 04:22:23,404 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:23,404 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:23,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:22:23,619 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash 617010667, now seen corresponding path program 13 times [2020-12-22 04:22:23,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:23,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474066186] [2020-12-22 04:22:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474066186] [2020-12-22 04:22:23,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348616622] [2020-12-22 04:22:23,829 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:23,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:22:23,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:24,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:24,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:22:24,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875607074] [2020-12-22 04:22:24,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:22:24,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:24,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:22:24,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:22:24,042 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 18 states. [2020-12-22 04:22:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:24,199 INFO L93 Difference]: Finished difference Result 171 states and 201 transitions. [2020-12-22 04:22:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:22:24,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-12-22 04:22:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:24,200 INFO L225 Difference]: With dead ends: 171 [2020-12-22 04:22:24,201 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 04:22:24,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:22:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 04:22:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2020-12-22 04:22:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:22:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2020-12-22 04:22:24,206 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 82 [2020-12-22 04:22:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:24,206 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2020-12-22 04:22:24,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:22:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2020-12-22 04:22:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:22:24,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:24,207 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:24,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:24,421 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash 467312237, now seen corresponding path program 14 times [2020-12-22 04:22:24,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:24,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625667356] [2020-12-22 04:22:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:24,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625667356] [2020-12-22 04:22:24,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283245456] [2020-12-22 04:22:24,650 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:24,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:22:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:24,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:24,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:22:24,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337622892] [2020-12-22 04:22:24,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:22:24,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:22:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:22:24,863 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand 19 states. [2020-12-22 04:22:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:25,022 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2020-12-22 04:22:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:22:25,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-12-22 04:22:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:25,024 INFO L225 Difference]: With dead ends: 181 [2020-12-22 04:22:25,024 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 04:22:25,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:22:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 04:22:25,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 87. [2020-12-22 04:22:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:22:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-12-22 04:22:25,029 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 84 [2020-12-22 04:22:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:25,030 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-12-22 04:22:25,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:22:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-12-22 04:22:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:22:25,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:25,031 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:25,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:22:25,246 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:25,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1658958225, now seen corresponding path program 15 times [2020-12-22 04:22:25,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:25,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346184755] [2020-12-22 04:22:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-12-22 04:22:25,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346184755] [2020-12-22 04:22:25,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715413275] [2020-12-22 04:22:25,477 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:25,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:22:25,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:22:25,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-12-22 04:22:25,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:25,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 21 [2020-12-22 04:22:25,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175623036] [2020-12-22 04:22:25,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:22:25,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:25,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:22:25,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:22:25,772 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 21 states. [2020-12-22 04:22:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:26,051 INFO L93 Difference]: Finished difference Result 179 states and 217 transitions. [2020-12-22 04:22:26,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:22:26,052 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 86 [2020-12-22 04:22:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:26,053 INFO L225 Difference]: With dead ends: 179 [2020-12-22 04:22:26,053 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 04:22:26,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:22:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 04:22:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-12-22 04:22:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 04:22:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2020-12-22 04:22:26,059 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 86 [2020-12-22 04:22:26,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:26,059 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2020-12-22 04:22:26,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:22:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2020-12-22 04:22:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 04:22:26,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:26,061 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:26,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:26,276 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:26,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1917622223, now seen corresponding path program 16 times [2020-12-22 04:22:26,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:26,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554614374] [2020-12-22 04:22:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:26,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554614374] [2020-12-22 04:22:26,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327608105] [2020-12-22 04:22:26,540 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 [2020-12-22 04:22:26,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:26,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:26,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:22:26,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:26,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:26,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:22:26,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895492875] [2020-12-22 04:22:26,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:22:26,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:26,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:22:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:22:26,793 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand 21 states. [2020-12-22 04:22:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:27,045 INFO L93 Difference]: Finished difference Result 201 states and 240 transitions. [2020-12-22 04:22:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:22:27,046 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 112 [2020-12-22 04:22:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:27,048 INFO L225 Difference]: With dead ends: 201 [2020-12-22 04:22:27,048 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 04:22:27,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:22:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 04:22:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2020-12-22 04:22:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 04:22:27,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2020-12-22 04:22:27,055 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 112 [2020-12-22 04:22:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:27,055 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2020-12-22 04:22:27,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:22:27,055 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2020-12-22 04:22:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 04:22:27,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:27,057 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:27,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:27,270 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2134372143, now seen corresponding path program 17 times [2020-12-22 04:22:27,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:27,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770142915] [2020-12-22 04:22:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:27,592 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:27,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770142915] [2020-12-22 04:22:27,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971444350] [2020-12-22 04:22:27,593 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:28,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 04:22:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:28,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:22:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:28,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:28,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:22:28,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578690389] [2020-12-22 04:22:28,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:22:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:22:28,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:22:28,160 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand 22 states. [2020-12-22 04:22:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:28,353 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2020-12-22 04:22:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:22:28,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-12-22 04:22:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:28,355 INFO L225 Difference]: With dead ends: 211 [2020-12-22 04:22:28,355 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 04:22:28,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:22:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 04:22:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2020-12-22 04:22:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 04:22:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2020-12-22 04:22:28,361 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 114 [2020-12-22 04:22:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:28,361 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2020-12-22 04:22:28,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:22:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2020-12-22 04:22:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 04:22:28,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:28,362 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:28,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:22:28,576 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:28,577 INFO L82 PathProgramCache]: Analyzing trace with hash -565620397, now seen corresponding path program 18 times [2020-12-22 04:22:28,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:28,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907262241] [2020-12-22 04:22:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:28,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907262241] [2020-12-22 04:22:28,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630663973] [2020-12-22 04:22:28,936 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:29,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-22 04:22:29,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:22:29,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:29,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:29,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:22:29,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452124840] [2020-12-22 04:22:29,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:22:29,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:29,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:22:29,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:22:29,885 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand 23 states. [2020-12-22 04:22:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:30,090 INFO L93 Difference]: Finished difference Result 221 states and 262 transitions. [2020-12-22 04:22:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:22:30,093 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 116 [2020-12-22 04:22:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:30,094 INFO L225 Difference]: With dead ends: 221 [2020-12-22 04:22:30,094 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 04:22:30,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:22:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 04:22:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 119. [2020-12-22 04:22:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 04:22:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2020-12-22 04:22:30,099 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 116 [2020-12-22 04:22:30,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:30,100 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2020-12-22 04:22:30,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:22:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2020-12-22 04:22:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 04:22:30,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:30,101 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:30,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:30,315 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash -528713387, now seen corresponding path program 19 times [2020-12-22 04:22:30,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:30,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378457354] [2020-12-22 04:22:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:30,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378457354] [2020-12-22 04:22:30,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960634879] [2020-12-22 04:22:30,715 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:22:30,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:30,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:30,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:22:30,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900114840] [2020-12-22 04:22:30,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:22:30,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:30,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:22:30,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:22:30,947 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand 24 states. [2020-12-22 04:22:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:31,196 INFO L93 Difference]: Finished difference Result 231 states and 273 transitions. [2020-12-22 04:22:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:22:31,197 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2020-12-22 04:22:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:31,199 INFO L225 Difference]: With dead ends: 231 [2020-12-22 04:22:31,199 INFO L226 Difference]: Without dead ends: 155 [2020-12-22 04:22:31,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:22:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-22 04:22:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-12-22 04:22:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-22 04:22:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-12-22 04:22:31,206 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 118 [2020-12-22 04:22:31,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:31,206 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-12-22 04:22:31,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:22:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-12-22 04:22:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 04:22:31,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:31,207 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:31,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:22:31,421 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash 579184855, now seen corresponding path program 20 times [2020-12-22 04:22:31,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:31,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845059486] [2020-12-22 04:22:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:31,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845059486] [2020-12-22 04:22:31,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344301654] [2020-12-22 04:22:31,867 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:31,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:22:31,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:32,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:32,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:22:32,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046309615] [2020-12-22 04:22:32,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:22:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:32,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:22:32,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:22:32,085 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 25 states. [2020-12-22 04:22:32,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:32,302 INFO L93 Difference]: Finished difference Result 241 states and 284 transitions. [2020-12-22 04:22:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:22:32,303 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 120 [2020-12-22 04:22:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:32,304 INFO L225 Difference]: With dead ends: 241 [2020-12-22 04:22:32,304 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 04:22:32,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:22:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 04:22:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2020-12-22 04:22:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-22 04:22:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2020-12-22 04:22:32,309 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 120 [2020-12-22 04:22:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:32,310 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2020-12-22 04:22:32,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:22:32,310 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2020-12-22 04:22:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 04:22:32,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:32,311 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:32,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:22:32,525 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:32,526 INFO L82 PathProgramCache]: Analyzing trace with hash 117506009, now seen corresponding path program 21 times [2020-12-22 04:22:32,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:32,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380242290] [2020-12-22 04:22:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-12-22 04:22:32,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380242290] [2020-12-22 04:22:32,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205305707] [2020-12-22 04:22:32,978 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:33,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:22:33,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:22:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-12-22 04:22:33,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:33,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 27 [2020-12-22 04:22:33,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876894105] [2020-12-22 04:22:33,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:22:33,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:33,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:22:33,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:22:33,717 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand 27 states. [2020-12-22 04:22:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:34,037 INFO L93 Difference]: Finished difference Result 239 states and 289 transitions. [2020-12-22 04:22:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:22:34,038 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-12-22 04:22:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:34,039 INFO L225 Difference]: With dead ends: 239 [2020-12-22 04:22:34,039 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 04:22:34,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=675, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:22:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 04:22:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-12-22 04:22:34,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-22 04:22:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 174 transitions. [2020-12-22 04:22:34,045 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 174 transitions. Word has length 122 [2020-12-22 04:22:34,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:34,045 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 174 transitions. [2020-12-22 04:22:34,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:22:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 174 transitions. [2020-12-22 04:22:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 04:22:34,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:34,047 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:34,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:34,262 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash 366023225, now seen corresponding path program 22 times [2020-12-22 04:22:34,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:34,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712397311] [2020-12-22 04:22:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:34,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712397311] [2020-12-22 04:22:34,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322066710] [2020-12-22 04:22:34,742 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:34,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:34,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:34,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:22:34,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:35,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:35,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:22:35,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367689250] [2020-12-22 04:22:35,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:22:35,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:35,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:22:35,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:22:35,007 INFO L87 Difference]: Start difference. First operand 149 states and 174 transitions. Second operand 27 states. [2020-12-22 04:22:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:35,256 INFO L93 Difference]: Finished difference Result 261 states and 312 transitions. [2020-12-22 04:22:35,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:22:35,257 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2020-12-22 04:22:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:35,258 INFO L225 Difference]: With dead ends: 261 [2020-12-22 04:22:35,258 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 04:22:35,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:22:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 04:22:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2020-12-22 04:22:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 04:22:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2020-12-22 04:22:35,265 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 148 [2020-12-22 04:22:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:35,265 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2020-12-22 04:22:35,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:22:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2020-12-22 04:22:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 04:22:35,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:35,267 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:35,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:22:35,481 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1024700987, now seen corresponding path program 23 times [2020-12-22 04:22:35,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:35,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355328661] [2020-12-22 04:22:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:35,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355328661] [2020-12-22 04:22:35,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367826890] [2020-12-22 04:22:35,947 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:37,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:22:37,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:37,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:22:37,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:37,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:37,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:22:37,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913417623] [2020-12-22 04:22:37,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:22:37,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:37,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:22:37,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:22:37,457 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand 28 states. [2020-12-22 04:22:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:37,732 INFO L93 Difference]: Finished difference Result 271 states and 323 transitions. [2020-12-22 04:22:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:22:37,733 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 150 [2020-12-22 04:22:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:37,734 INFO L225 Difference]: With dead ends: 271 [2020-12-22 04:22:37,734 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 04:22:37,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:22:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 04:22:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 153. [2020-12-22 04:22:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 04:22:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 178 transitions. [2020-12-22 04:22:37,741 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 178 transitions. Word has length 150 [2020-12-22 04:22:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:37,741 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 178 transitions. [2020-12-22 04:22:37,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:22:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 178 transitions. [2020-12-22 04:22:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 04:22:37,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:37,743 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:37,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:37,959 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:37,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:37,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1641129539, now seen corresponding path program 24 times [2020-12-22 04:22:37,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:37,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342703470] [2020-12-22 04:22:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:38,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342703470] [2020-12-22 04:22:38,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298956904] [2020-12-22 04:22:38,427 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:40,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-12-22 04:22:40,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:40,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:22:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:40,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:40,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:22:40,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837845757] [2020-12-22 04:22:40,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:22:40,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:40,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:22:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:22:40,718 INFO L87 Difference]: Start difference. First operand 153 states and 178 transitions. Second operand 29 states. [2020-12-22 04:22:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:41,031 INFO L93 Difference]: Finished difference Result 281 states and 334 transitions. [2020-12-22 04:22:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:22:41,031 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 152 [2020-12-22 04:22:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:41,033 INFO L225 Difference]: With dead ends: 281 [2020-12-22 04:22:41,033 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 04:22:41,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:22:41,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 04:22:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2020-12-22 04:22:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 04:22:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 180 transitions. [2020-12-22 04:22:41,041 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 180 transitions. Word has length 152 [2020-12-22 04:22:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:41,041 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 180 transitions. [2020-12-22 04:22:41,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:22:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 180 transitions. [2020-12-22 04:22:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 04:22:41,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:41,043 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:41,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:22:41,257 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:41,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:41,257 INFO L82 PathProgramCache]: Analyzing trace with hash 591210687, now seen corresponding path program 25 times [2020-12-22 04:22:41,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:41,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21874177] [2020-12-22 04:22:41,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21874177] [2020-12-22 04:22:41,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342651600] [2020-12-22 04:22:41,832 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:22:41,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:42,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:42,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:22:42,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807115008] [2020-12-22 04:22:42,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:22:42,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:42,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:22:42,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:22:42,120 INFO L87 Difference]: Start difference. First operand 155 states and 180 transitions. Second operand 30 states. [2020-12-22 04:22:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:42,423 INFO L93 Difference]: Finished difference Result 291 states and 345 transitions. [2020-12-22 04:22:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:22:42,424 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 154 [2020-12-22 04:22:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:42,425 INFO L225 Difference]: With dead ends: 291 [2020-12-22 04:22:42,425 INFO L226 Difference]: Without dead ends: 191 [2020-12-22 04:22:42,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:22:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-22 04:22:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 157. [2020-12-22 04:22:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 04:22:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2020-12-22 04:22:42,432 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 154 [2020-12-22 04:22:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:42,432 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2020-12-22 04:22:42,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:22:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2020-12-22 04:22:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 04:22:42,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:42,434 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:42,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:22:42,650 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1613480127, now seen corresponding path program 26 times [2020-12-22 04:22:42,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:42,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131736372] [2020-12-22 04:22:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:43,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131736372] [2020-12-22 04:22:43,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568369228] [2020-12-22 04:22:43,237 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:43,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:22:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:22:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:43,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:43,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:22:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287688900] [2020-12-22 04:22:43,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:22:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:22:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:22:43,552 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 31 states. [2020-12-22 04:22:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:43,876 INFO L93 Difference]: Finished difference Result 301 states and 356 transitions. [2020-12-22 04:22:43,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:22:43,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2020-12-22 04:22:43,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:43,878 INFO L225 Difference]: With dead ends: 301 [2020-12-22 04:22:43,879 INFO L226 Difference]: Without dead ends: 201 [2020-12-22 04:22:43,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:22:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-22 04:22:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 159. [2020-12-22 04:22:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 04:22:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 184 transitions. [2020-12-22 04:22:43,885 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 184 transitions. Word has length 156 [2020-12-22 04:22:43,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:43,886 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 184 transitions. [2020-12-22 04:22:43,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:22:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 184 transitions. [2020-12-22 04:22:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 04:22:43,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:43,888 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:44,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:44,102 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:44,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1392491843, now seen corresponding path program 27 times [2020-12-22 04:22:44,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:44,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947298597] [2020-12-22 04:22:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1865 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2020-12-22 04:22:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947298597] [2020-12-22 04:22:44,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519314162] [2020-12-22 04:22:44,720 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:45,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-22 04:22:45,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:22:45,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1865 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-12-22 04:22:45,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:45,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 33 [2020-12-22 04:22:45,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322696046] [2020-12-22 04:22:45,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:22:45,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:45,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:22:45,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:22:45,894 INFO L87 Difference]: Start difference. First operand 159 states and 184 transitions. Second operand 33 states. [2020-12-22 04:22:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:46,331 INFO L93 Difference]: Finished difference Result 299 states and 361 transitions. [2020-12-22 04:22:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:22:46,332 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 158 [2020-12-22 04:22:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:46,335 INFO L225 Difference]: With dead ends: 299 [2020-12-22 04:22:46,335 INFO L226 Difference]: Without dead ends: 187 [2020-12-22 04:22:46,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=552, Invalid=930, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:22:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-22 04:22:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2020-12-22 04:22:46,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 04:22:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 216 transitions. [2020-12-22 04:22:46,341 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 216 transitions. Word has length 158 [2020-12-22 04:22:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:46,342 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 216 transitions. [2020-12-22 04:22:46,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:22:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 216 transitions. [2020-12-22 04:22:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-22 04:22:46,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:46,343 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:46,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:46,558 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1491474595, now seen corresponding path program 28 times [2020-12-22 04:22:46,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:46,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157515544] [2020-12-22 04:22:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:22:47,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157515544] [2020-12-22 04:22:47,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106162920] [2020-12-22 04:22:47,189 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 [2020-12-22 04:22:47,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:22:47,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:47,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:22:47,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:22:47,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:47,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:22:47,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531353216] [2020-12-22 04:22:47,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:22:47,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:47,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:22:47,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:22:47,515 INFO L87 Difference]: Start difference. First operand 185 states and 216 transitions. Second operand 33 states. [2020-12-22 04:22:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:47,868 INFO L93 Difference]: Finished difference Result 321 states and 384 transitions. [2020-12-22 04:22:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:22:47,869 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 184 [2020-12-22 04:22:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:47,871 INFO L225 Difference]: With dead ends: 321 [2020-12-22 04:22:47,871 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 04:22:47,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:22:47,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 04:22:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-12-22 04:22:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 04:22:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 218 transitions. [2020-12-22 04:22:47,878 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 218 transitions. Word has length 184 [2020-12-22 04:22:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:47,878 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 218 transitions. [2020-12-22 04:22:47,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:22:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 218 transitions. [2020-12-22 04:22:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-22 04:22:47,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:47,880 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:48,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 04:22:48,094 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:48,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1834459227, now seen corresponding path program 29 times [2020-12-22 04:22:48,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:48,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667298345] [2020-12-22 04:22:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:22:48,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667298345] [2020-12-22 04:22:48,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487939544] [2020-12-22 04:22:48,806 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 [2020-12-22 04:22:55,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-22 04:22:55,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:22:55,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:22:55,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:22:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:22:55,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:22:55,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:22:55,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160130801] [2020-12-22 04:22:55,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:22:55,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:22:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:22:55,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:22:55,355 INFO L87 Difference]: Start difference. First operand 187 states and 218 transitions. Second operand 34 states. [2020-12-22 04:22:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:22:55,711 INFO L93 Difference]: Finished difference Result 331 states and 395 transitions. [2020-12-22 04:22:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:22:55,711 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 186 [2020-12-22 04:22:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:22:55,713 INFO L225 Difference]: With dead ends: 331 [2020-12-22 04:22:55,713 INFO L226 Difference]: Without dead ends: 207 [2020-12-22 04:22:55,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:22:55,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-22 04:22:55,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2020-12-22 04:22:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-22 04:22:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 220 transitions. [2020-12-22 04:22:55,719 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 220 transitions. Word has length 186 [2020-12-22 04:22:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:22:55,720 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 220 transitions. [2020-12-22 04:22:55,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:22:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 220 transitions. [2020-12-22 04:22:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-22 04:22:55,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:22:55,721 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:22:55,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:22:55,936 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:22:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:22:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1693773351, now seen corresponding path program 30 times [2020-12-22 04:22:55,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:22:55,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324374599] [2020-12-22 04:22:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:22:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:22:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:22:56,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324374599] [2020-12-22 04:22:56,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557254524] [2020-12-22 04:22:56,633 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:01,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2020-12-22 04:23:01,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:23:01,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2672 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:23:01,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:01,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:23:01,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655785551] [2020-12-22 04:23:01,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:23:01,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:01,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:23:01,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:23:01,512 INFO L87 Difference]: Start difference. First operand 189 states and 220 transitions. Second operand 35 states. [2020-12-22 04:23:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:01,846 INFO L93 Difference]: Finished difference Result 341 states and 406 transitions. [2020-12-22 04:23:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:23:01,847 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 188 [2020-12-22 04:23:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:01,848 INFO L225 Difference]: With dead ends: 341 [2020-12-22 04:23:01,848 INFO L226 Difference]: Without dead ends: 217 [2020-12-22 04:23:01,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:23:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-22 04:23:01,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 191. [2020-12-22 04:23:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-22 04:23:01,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 222 transitions. [2020-12-22 04:23:01,855 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 222 transitions. Word has length 188 [2020-12-22 04:23:01,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:01,855 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 222 transitions. [2020-12-22 04:23:01,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:23:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 222 transitions. [2020-12-22 04:23:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-12-22 04:23:01,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:01,857 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:02,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:23:02,071 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash -698883031, now seen corresponding path program 31 times [2020-12-22 04:23:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:02,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864151501] [2020-12-22 04:23:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:23:02,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864151501] [2020-12-22 04:23:02,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024338140] [2020-12-22 04:23:02,848 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:23:02,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2735 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:23:03,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:03,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:23:03,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086932137] [2020-12-22 04:23:03,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:23:03,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:03,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:23:03,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:23:03,145 INFO L87 Difference]: Start difference. First operand 191 states and 222 transitions. Second operand 36 states. [2020-12-22 04:23:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:03,492 INFO L93 Difference]: Finished difference Result 351 states and 417 transitions. [2020-12-22 04:23:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:23:03,493 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 190 [2020-12-22 04:23:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:03,495 INFO L225 Difference]: With dead ends: 351 [2020-12-22 04:23:03,495 INFO L226 Difference]: Without dead ends: 227 [2020-12-22 04:23:03,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:23:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-22 04:23:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 193. [2020-12-22 04:23:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-22 04:23:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 224 transitions. [2020-12-22 04:23:03,501 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 224 transitions. Word has length 190 [2020-12-22 04:23:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:03,502 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 224 transitions. [2020-12-22 04:23:03,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:23:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 224 transitions. [2020-12-22 04:23:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-22 04:23:03,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:03,503 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:03,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:23:03,718 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:03,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2060804523, now seen corresponding path program 32 times [2020-12-22 04:23:03,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:03,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483474066] [2020-12-22 04:23:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:23:04,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483474066] [2020-12-22 04:23:04,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899040877] [2020-12-22 04:23:04,494 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:04,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:04,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:04,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:23:04,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:23:04,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:04,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:23:04,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284914214] [2020-12-22 04:23:04,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:23:04,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:04,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:23:04,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:23:04,842 INFO L87 Difference]: Start difference. First operand 193 states and 224 transitions. Second operand 37 states. [2020-12-22 04:23:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:05,234 INFO L93 Difference]: Finished difference Result 361 states and 428 transitions. [2020-12-22 04:23:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:23:05,234 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 192 [2020-12-22 04:23:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:05,236 INFO L225 Difference]: With dead ends: 361 [2020-12-22 04:23:05,236 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 04:23:05,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:23:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 04:23:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 195. [2020-12-22 04:23:05,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-22 04:23:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 226 transitions. [2020-12-22 04:23:05,243 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 226 transitions. Word has length 192 [2020-12-22 04:23:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:05,243 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 226 transitions. [2020-12-22 04:23:05,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:23:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 226 transitions. [2020-12-22 04:23:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-22 04:23:05,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:05,244 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:05,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:23:05,458 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:05,458 INFO L82 PathProgramCache]: Analyzing trace with hash -169245011, now seen corresponding path program 33 times [2020-12-22 04:23:05,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:05,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112545862] [2020-12-22 04:23:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2867 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2020-12-22 04:23:06,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112545862] [2020-12-22 04:23:06,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720035827] [2020-12-22 04:23:06,352 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:15,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-22 04:23:15,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:23:15,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2867 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-12-22 04:23:15,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:15,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 39 [2020-12-22 04:23:15,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441586887] [2020-12-22 04:23:15,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:23:15,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:15,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:23:15,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:23:15,551 INFO L87 Difference]: Start difference. First operand 195 states and 226 transitions. Second operand 39 states. [2020-12-22 04:23:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:16,151 INFO L93 Difference]: Finished difference Result 359 states and 433 transitions. [2020-12-22 04:23:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:23:16,151 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 194 [2020-12-22 04:23:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:16,153 INFO L225 Difference]: With dead ends: 359 [2020-12-22 04:23:16,153 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 04:23:16,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:23:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 04:23:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2020-12-22 04:23:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-22 04:23:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 258 transitions. [2020-12-22 04:23:16,160 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 258 transitions. Word has length 194 [2020-12-22 04:23:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:16,160 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 258 transitions. [2020-12-22 04:23:16,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:23:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 258 transitions. [2020-12-22 04:23:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 04:23:16,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:16,162 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:16,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:23:16,375 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash -786781427, now seen corresponding path program 34 times [2020-12-22 04:23:16,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:16,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875810555] [2020-12-22 04:23:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2020-12-22 04:23:17,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875810555] [2020-12-22 04:23:17,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899445015] [2020-12-22 04:23:17,342 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:17,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:23:17,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:17,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:23:17,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2020-12-22 04:23:17,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:17,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:23:17,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775773557] [2020-12-22 04:23:17,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:23:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:17,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:23:17,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:23:17,710 INFO L87 Difference]: Start difference. First operand 221 states and 258 transitions. Second operand 39 states. [2020-12-22 04:23:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:18,134 INFO L93 Difference]: Finished difference Result 381 states and 456 transitions. [2020-12-22 04:23:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:23:18,134 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 220 [2020-12-22 04:23:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:18,135 INFO L225 Difference]: With dead ends: 381 [2020-12-22 04:23:18,135 INFO L226 Difference]: Without dead ends: 233 [2020-12-22 04:23:18,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:23:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-22 04:23:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 223. [2020-12-22 04:23:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-22 04:23:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 260 transitions. [2020-12-22 04:23:18,142 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 260 transitions. Word has length 220 [2020-12-22 04:23:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:18,142 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 260 transitions. [2020-12-22 04:23:18,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:23:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 260 transitions. [2020-12-22 04:23:18,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-12-22 04:23:18,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:18,144 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:18,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:23:18,358 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:18,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2066409201, now seen corresponding path program 35 times [2020-12-22 04:23:18,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:18,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154796925] [2020-12-22 04:23:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2020-12-22 04:23:19,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154796925] [2020-12-22 04:23:19,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359737052] [2020-12-22 04:23:19,362 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 [2020-12-22 04:23:27,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2020-12-22 04:23:27,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:27,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:23:27,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2020-12-22 04:23:27,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:27,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:23:27,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180250950] [2020-12-22 04:23:27,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:23:27,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:23:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:23:27,699 INFO L87 Difference]: Start difference. First operand 223 states and 260 transitions. Second operand 40 states. [2020-12-22 04:23:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:28,157 INFO L93 Difference]: Finished difference Result 391 states and 467 transitions. [2020-12-22 04:23:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:23:28,158 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 222 [2020-12-22 04:23:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:28,160 INFO L225 Difference]: With dead ends: 391 [2020-12-22 04:23:28,160 INFO L226 Difference]: Without dead ends: 243 [2020-12-22 04:23:28,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:23:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-22 04:23:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 225. [2020-12-22 04:23:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-22 04:23:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 262 transitions. [2020-12-22 04:23:28,166 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 262 transitions. Word has length 222 [2020-12-22 04:23:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:28,166 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 262 transitions. [2020-12-22 04:23:28,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:23:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 262 transitions. [2020-12-22 04:23:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 04:23:28,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:28,168 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:28,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:23:28,383 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:28,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:28,384 INFO L82 PathProgramCache]: Analyzing trace with hash 866913937, now seen corresponding path program 36 times [2020-12-22 04:23:28,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:28,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264790625] [2020-12-22 04:23:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2020-12-22 04:23:29,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264790625] [2020-12-22 04:23:29,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696396834] [2020-12-22 04:23:29,354 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:39,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2020-12-22 04:23:39,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:39,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:23:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-12-22 04:23:40,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:40,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 42 [2020-12-22 04:23:40,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868773629] [2020-12-22 04:23:40,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:23:40,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:40,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:23:40,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:23:40,051 INFO L87 Difference]: Start difference. First operand 225 states and 262 transitions. Second operand 42 states. [2020-12-22 04:23:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:40,539 INFO L93 Difference]: Finished difference Result 395 states and 475 transitions. [2020-12-22 04:23:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:23:40,540 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 224 [2020-12-22 04:23:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:40,542 INFO L225 Difference]: With dead ends: 395 [2020-12-22 04:23:40,542 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 04:23:40,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=840, Invalid=1140, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:23:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 04:23:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2020-12-22 04:23:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-12-22 04:23:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 279 transitions. [2020-12-22 04:23:40,550 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 279 transitions. Word has length 224 [2020-12-22 04:23:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:40,550 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 279 transitions. [2020-12-22 04:23:40,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:23:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 279 transitions. [2020-12-22 04:23:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-12-22 04:23:40,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:40,552 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:40,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:23:40,753 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:40,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:40,753 INFO L82 PathProgramCache]: Analyzing trace with hash 111048898, now seen corresponding path program 37 times [2020-12-22 04:23:40,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:40,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982422143] [2020-12-22 04:23:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-12-22 04:23:41,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982422143] [2020-12-22 04:23:41,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371310128] [2020-12-22 04:23:41,907 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:42,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:23:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-12-22 04:23:42,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:42,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:23:42,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888917310] [2020-12-22 04:23:42,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:23:42,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:42,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:23:42,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:23:42,337 INFO L87 Difference]: Start difference. First operand 239 states and 279 transitions. Second operand 42 states. [2020-12-22 04:23:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:42,760 INFO L93 Difference]: Finished difference Result 411 states and 492 transitions. [2020-12-22 04:23:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:23:42,761 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 238 [2020-12-22 04:23:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:42,762 INFO L225 Difference]: With dead ends: 411 [2020-12-22 04:23:42,762 INFO L226 Difference]: Without dead ends: 251 [2020-12-22 04:23:42,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:23:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-22 04:23:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 241. [2020-12-22 04:23:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-22 04:23:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 281 transitions. [2020-12-22 04:23:42,771 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 281 transitions. Word has length 238 [2020-12-22 04:23:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:42,771 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 281 transitions. [2020-12-22 04:23:42,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:23:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 281 transitions. [2020-12-22 04:23:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-12-22 04:23:42,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:42,773 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:42,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:42,988 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:42,988 INFO L82 PathProgramCache]: Analyzing trace with hash -785503676, now seen corresponding path program 38 times [2020-12-22 04:23:42,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:42,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818291127] [2020-12-22 04:23:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-12-22 04:23:44,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818291127] [2020-12-22 04:23:44,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618040017] [2020-12-22 04:23:44,078 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:44,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:23:44,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:23:44,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:23:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:23:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-12-22 04:23:44,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:23:44,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:23:44,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058489644] [2020-12-22 04:23:44,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:23:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:23:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:23:44,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:23:44,488 INFO L87 Difference]: Start difference. First operand 241 states and 281 transitions. Second operand 43 states. [2020-12-22 04:23:44,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:23:44,985 INFO L93 Difference]: Finished difference Result 421 states and 503 transitions. [2020-12-22 04:23:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:23:44,985 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 240 [2020-12-22 04:23:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:23:44,987 INFO L225 Difference]: With dead ends: 421 [2020-12-22 04:23:44,987 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 04:23:44,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:23:44,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 04:23:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 243. [2020-12-22 04:23:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-22 04:23:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 283 transitions. [2020-12-22 04:23:44,993 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 283 transitions. Word has length 240 [2020-12-22 04:23:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:23:44,993 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 283 transitions. [2020-12-22 04:23:44,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:23:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 283 transitions. [2020-12-22 04:23:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-22 04:23:44,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:23:44,995 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:23:45,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:23:45,208 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:23:45,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:23:45,209 INFO L82 PathProgramCache]: Analyzing trace with hash 915899206, now seen corresponding path program 39 times [2020-12-22 04:23:45,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:23:45,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425409067] [2020-12-22 04:23:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:23:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:23:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4526 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-12-22 04:23:46,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425409067] [2020-12-22 04:23:46,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290577904] [2020-12-22 04:23:46,397 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:18,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2020-12-22 04:24:18,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:24:18,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4526 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-12-22 04:24:18,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:18,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 45 [2020-12-22 04:24:18,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981139334] [2020-12-22 04:24:18,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:24:18,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:24:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:24:18,995 INFO L87 Difference]: Start difference. First operand 243 states and 283 transitions. Second operand 45 states. [2020-12-22 04:24:19,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:19,623 INFO L93 Difference]: Finished difference Result 425 states and 511 transitions. [2020-12-22 04:24:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:24:19,624 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 242 [2020-12-22 04:24:19,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:19,626 INFO L225 Difference]: With dead ends: 425 [2020-12-22 04:24:19,626 INFO L226 Difference]: Without dead ends: 259 [2020-12-22 04:24:19,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=966, Invalid=1290, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:24:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-22 04:24:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 257. [2020-12-22 04:24:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 04:24:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 300 transitions. [2020-12-22 04:24:19,633 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 300 transitions. Word has length 242 [2020-12-22 04:24:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:19,633 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 300 transitions. [2020-12-22 04:24:19,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:24:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 300 transitions. [2020-12-22 04:24:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 04:24:19,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:19,635 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:19,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:19,836 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1719809673, now seen corresponding path program 40 times [2020-12-22 04:24:19,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:19,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188344034] [2020-12-22 04:24:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:24:21,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188344034] [2020-12-22 04:24:21,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794756361] [2020-12-22 04:24:21,023 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:24:21,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:24:21,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:24:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:24:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:24:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:24:21,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:24:21,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:24:21,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773207140] [2020-12-22 04:24:21,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:24:21,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:24:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:24:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:24:21,506 INFO L87 Difference]: Start difference. First operand 257 states and 300 transitions. Second operand 45 states. [2020-12-22 04:24:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:24:22,059 INFO L93 Difference]: Finished difference Result 441 states and 528 transitions. [2020-12-22 04:24:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:24:22,059 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 256 [2020-12-22 04:24:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:24:22,061 INFO L225 Difference]: With dead ends: 441 [2020-12-22 04:24:22,061 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 04:24:22,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:24:22,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 04:24:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 259. [2020-12-22 04:24:22,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-22 04:24:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 302 transitions. [2020-12-22 04:24:22,068 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 302 transitions. Word has length 256 [2020-12-22 04:24:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:24:22,069 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 302 transitions. [2020-12-22 04:24:22,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:24:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 302 transitions. [2020-12-22 04:24:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-22 04:24:22,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:24:22,070 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:24:22,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 04:24:22,278 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:24:22,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:24:22,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1133977991, now seen corresponding path program 41 times [2020-12-22 04:24:22,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:24:22,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239973611] [2020-12-22 04:24:22,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:24:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:24:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5167 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:24:23,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239973611] [2020-12-22 04:24:23,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487732359] [2020-12-22 04:24:23,579 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:20,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2020-12-22 04:25:20,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:25:20,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:25:20,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:25:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5167 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:25:21,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:25:21,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:25:21,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240370096] [2020-12-22 04:25:21,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:25:21,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:25:21,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:25:21,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:25:21,021 INFO L87 Difference]: Start difference. First operand 259 states and 302 transitions. Second operand 46 states. [2020-12-22 04:25:21,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:25:21,532 INFO L93 Difference]: Finished difference Result 451 states and 539 transitions. [2020-12-22 04:25:21,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:25:21,532 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 258 [2020-12-22 04:25:21,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:25:21,534 INFO L225 Difference]: With dead ends: 451 [2020-12-22 04:25:21,534 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 04:25:21,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:25:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 04:25:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 261. [2020-12-22 04:25:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-12-22 04:25:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 304 transitions. [2020-12-22 04:25:21,540 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 304 transitions. Word has length 258 [2020-12-22 04:25:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:25:21,541 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 304 transitions. [2020-12-22 04:25:21,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:25:21,541 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 304 transitions. [2020-12-22 04:25:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-12-22 04:25:21,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:25:21,542 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:25:21,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:25:21,743 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:25:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:25:21,744 INFO L82 PathProgramCache]: Analyzing trace with hash -790447365, now seen corresponding path program 42 times [2020-12-22 04:25:21,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:25:21,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705560678] [2020-12-22 04:25:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:25:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:25:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5252 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:25:23,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705560678] [2020-12-22 04:25:23,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610857063] [2020-12-22 04:25:23,156 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:19,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2020-12-22 04:26:19,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:19,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:26:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5252 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:26:19,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:19,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:26:19,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126518566] [2020-12-22 04:26:19,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:26:19,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:19,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:26:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:26:19,626 INFO L87 Difference]: Start difference. First operand 261 states and 304 transitions. Second operand 47 states. [2020-12-22 04:26:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:20,222 INFO L93 Difference]: Finished difference Result 461 states and 550 transitions. [2020-12-22 04:26:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:26:20,222 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 260 [2020-12-22 04:26:20,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:20,223 INFO L225 Difference]: With dead ends: 461 [2020-12-22 04:26:20,223 INFO L226 Difference]: Without dead ends: 289 [2020-12-22 04:26:20,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:26:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-22 04:26:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 263. [2020-12-22 04:26:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-22 04:26:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 306 transitions. [2020-12-22 04:26:20,247 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 306 transitions. Word has length 260 [2020-12-22 04:26:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:20,248 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 306 transitions. [2020-12-22 04:26:20,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:26:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 306 transitions. [2020-12-22 04:26:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-12-22 04:26:20,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:20,250 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:20,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:20,463 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:20,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1369997571, now seen corresponding path program 43 times [2020-12-22 04:26:20,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:20,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221297092] [2020-12-22 04:26:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:26:21,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221297092] [2020-12-22 04:26:21,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117146241] [2020-12-22 04:26:21,892 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:26:22,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:26:22,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:22,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:26:22,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533740671] [2020-12-22 04:26:22,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:26:22,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:26:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:22,319 INFO L87 Difference]: Start difference. First operand 263 states and 306 transitions. Second operand 48 states. [2020-12-22 04:26:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:22,841 INFO L93 Difference]: Finished difference Result 471 states and 561 transitions. [2020-12-22 04:26:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:26:22,841 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 262 [2020-12-22 04:26:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:22,843 INFO L225 Difference]: With dead ends: 471 [2020-12-22 04:26:22,843 INFO L226 Difference]: Without dead ends: 299 [2020-12-22 04:26:22,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:26:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-22 04:26:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 265. [2020-12-22 04:26:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-12-22 04:26:22,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 308 transitions. [2020-12-22 04:26:22,851 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 308 transitions. Word has length 262 [2020-12-22 04:26:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:22,851 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 308 transitions. [2020-12-22 04:26:22,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:26:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 308 transitions. [2020-12-22 04:26:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-12-22 04:26:22,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:22,853 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:23,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:26:23,068 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash 28002943, now seen corresponding path program 44 times [2020-12-22 04:26:23,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:23,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341204469] [2020-12-22 04:26:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5428 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:26:24,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341204469] [2020-12-22 04:26:24,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846412232] [2020-12-22 04:26:24,610 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:24,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:24,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:24,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:26:24,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5428 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:26:25,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:25,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 04:26:25,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023742809] [2020-12-22 04:26:25,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:26:25,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:26:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:26:25,091 INFO L87 Difference]: Start difference. First operand 265 states and 308 transitions. Second operand 49 states. [2020-12-22 04:26:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:25,678 INFO L93 Difference]: Finished difference Result 481 states and 572 transitions. [2020-12-22 04:26:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:26:25,679 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 264 [2020-12-22 04:26:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:25,681 INFO L225 Difference]: With dead ends: 481 [2020-12-22 04:26:25,681 INFO L226 Difference]: Without dead ends: 309 [2020-12-22 04:26:25,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:26:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-22 04:26:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 267. [2020-12-22 04:26:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 04:26:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 310 transitions. [2020-12-22 04:26:25,688 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 310 transitions. Word has length 264 [2020-12-22 04:26:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:25,688 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 310 transitions. [2020-12-22 04:26:25,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:26:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 310 transitions. [2020-12-22 04:26:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-22 04:26:25,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:25,690 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:25,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:26:25,904 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:25,904 INFO L82 PathProgramCache]: Analyzing trace with hash -818266751, now seen corresponding path program 45 times [2020-12-22 04:26:25,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:25,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680065830] [2020-12-22 04:26:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5519 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2020-12-22 04:26:27,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680065830] [2020-12-22 04:26:27,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805150414] [2020-12-22 04:26:27,498 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true