/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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:45:06,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:45:06,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:45:06,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:45:06,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:45:06,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:45:06,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:45:06,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:45:06,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:45:06,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:45:06,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:45:06,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:45:06,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:45:06,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:45:06,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:45:06,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:45:06,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:45:06,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:45:06,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:45:06,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:45:06,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:45:06,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:45:06,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:45:06,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:45:06,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:45:06,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:45:06,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:45:06,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:45:06,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:45:06,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:45:06,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:45:06,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:45:06,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:45:06,581 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:45:06,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:45:06,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:45:06,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:45:06,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:45:06,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:45:06,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:45:06,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:45:06,583 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:45:06,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:45:06,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:45:06,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:45:06,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:45:06,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:45:06,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:45:06,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:45:06,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:45:06,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:45:06,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:45:06,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:45:06,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:45:06,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:45:06,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:45:07,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:45:07,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:45:07,036 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:45:07,036 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:45:07,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label05.c [2020-12-22 09:45:07,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea86de047/f2d035a1b2c8438389ded3aa8f9992bf/FLAG55ebad5f8 [2020-12-22 09:45:08,215 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:45:08,216 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label05.c [2020-12-22 09:45:08,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea86de047/f2d035a1b2c8438389ded3aa8f9992bf/FLAG55ebad5f8 [2020-12-22 09:45:08,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea86de047/f2d035a1b2c8438389ded3aa8f9992bf [2020-12-22 09:45:08,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:45:08,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:45:08,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:08,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:45:08,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:45:08,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:08" (1/1) ... [2020-12-22 09:45:08,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fea143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:08, skipping insertion in model container [2020-12-22 09:45:08,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:45:08" (1/1) ... [2020-12-22 09:45:08,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:45:08,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:45:09,154 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label05.c[8688,8701] [2020-12-22 09:45:09,228 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label05.c[15381,15394] [2020-12-22 09:45:10,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:10,252 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:45:10,320 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label05.c[8688,8701] [2020-12-22 09:45:10,337 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/combinations/pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label05.c[15381,15394] [2020-12-22 09:45:11,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:45:11,088 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:45:11,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11 WrapperNode [2020-12-22 09:45:11,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:45:11,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:11,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:45:11,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:45:11,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:11,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:11,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:45:11,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:45:11,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:45:11,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:45:11,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:11,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:11,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:11,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:11,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:11,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:12,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (1/1) ... [2020-12-22 09:45:12,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:45:12,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:45:12,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:45:12,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:45:12,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (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 09:45:12,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:45:12,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:45:12,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:45:12,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:45:18,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:45:18,070 INFO L299 CfgBuilder]: Removed 32 assume(true) statements. [2020-12-22 09:45:18,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:18 BoogieIcfgContainer [2020-12-22 09:45:18,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:45:18,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:45:18,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:45:18,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:45:18,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:45:08" (1/3) ... [2020-12-22 09:45:18,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59173f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:18, skipping insertion in model container [2020-12-22 09:45:18,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:45:11" (2/3) ... [2020-12-22 09:45:18,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59173f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:45:18, skipping insertion in model container [2020-12-22 09:45:18,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:45:18" (3/3) ... [2020-12-22 09:45:18,089 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals+Problem12_label05.c [2020-12-22 09:45:18,097 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:45:18,103 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:45:18,124 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:45:18,179 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:45:18,179 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:45:18,179 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:45:18,179 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:45:18,179 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:45:18,180 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:45:18,180 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:45:18,180 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:45:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states. [2020-12-22 09:45:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:18,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:18,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:18,236 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:45:18,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:18,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146068677] [2020-12-22 09:45:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:18,491 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 09:45:18,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146068677] [2020-12-22 09:45:18,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:18,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:45:18,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611274639] [2020-12-22 09:45:18,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:45:18,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:45:18,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:45:18,522 INFO L87 Difference]: Start difference. First operand 893 states. Second operand 2 states. [2020-12-22 09:45:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:18,622 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2020-12-22 09:45:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:45:18,624 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:45:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:18,659 INFO L225 Difference]: With dead ends: 1757 [2020-12-22 09:45:18,659 INFO L226 Difference]: Without dead ends: 827 [2020-12-22 09:45:18,672 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 09:45:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2020-12-22 09:45:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2020-12-22 09:45:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:45:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2020-12-22 09:45:18,792 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2020-12-22 09:45:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:18,792 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2020-12-22 09:45:18,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:45:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2020-12-22 09:45:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:45:18,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:18,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:18,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:45:18,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:45:18,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:18,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743860067] [2020-12-22 09:45:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:19,012 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 09:45:19,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743860067] [2020-12-22 09:45:19,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:19,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:19,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775836915] [2020-12-22 09:45:19,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:19,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:19,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:19,017 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand 5 states. [2020-12-22 09:45:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:19,133 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2020-12-22 09:45:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:19,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:45:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:19,140 INFO L225 Difference]: With dead ends: 919 [2020-12-22 09:45:19,140 INFO L226 Difference]: Without dead ends: 871 [2020-12-22 09:45:19,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:45:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2020-12-22 09:45:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2020-12-22 09:45:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-12-22 09:45:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2020-12-22 09:45:19,172 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2020-12-22 09:45:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:19,172 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2020-12-22 09:45:19,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2020-12-22 09:45:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:19,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:19,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:19,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:45:19,175 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:45:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478307105] [2020-12-22 09:45:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:19,326 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 09:45:19,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478307105] [2020-12-22 09:45:19,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:19,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:19,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147899203] [2020-12-22 09:45:19,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:19,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:19,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:19,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:19,335 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand 3 states. [2020-12-22 09:45:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:19,381 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2020-12-22 09:45:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:19,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:19,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:19,391 INFO L225 Difference]: With dead ends: 909 [2020-12-22 09:45:19,392 INFO L226 Difference]: Without dead ends: 865 [2020-12-22 09:45:19,394 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 09:45:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-22 09:45:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2020-12-22 09:45:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-12-22 09:45:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2020-12-22 09:45:19,437 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2020-12-22 09:45:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:19,438 INFO L481 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2020-12-22 09:45:19,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2020-12-22 09:45:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:19,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:19,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:19,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:45:19,444 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:19,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:45:19,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:19,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227306631] [2020-12-22 09:45:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:19,601 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 09:45:19,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227306631] [2020-12-22 09:45:19,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:19,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:19,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984123391] [2020-12-22 09:45:19,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:19,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:19,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:19,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:19,605 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand 3 states. [2020-12-22 09:45:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:19,649 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2020-12-22 09:45:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:19,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:19,655 INFO L225 Difference]: With dead ends: 1011 [2020-12-22 09:45:19,655 INFO L226 Difference]: Without dead ends: 931 [2020-12-22 09:45:19,656 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 09:45:19,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2020-12-22 09:45:19,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2020-12-22 09:45:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 929 states. [2020-12-22 09:45:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2020-12-22 09:45:19,686 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2020-12-22 09:45:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:19,687 INFO L481 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2020-12-22 09:45:19,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2020-12-22 09:45:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:19,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:19,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:19,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:45:19,690 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:19,691 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:45:19,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:19,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718600712] [2020-12-22 09:45:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:19,755 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 09:45:19,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718600712] [2020-12-22 09:45:19,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:19,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:19,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386752873] [2020-12-22 09:45:19,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:19,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:19,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:19,758 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand 3 states. [2020-12-22 09:45:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:19,803 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2020-12-22 09:45:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:19,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:19,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:19,810 INFO L225 Difference]: With dead ends: 1197 [2020-12-22 09:45:19,810 INFO L226 Difference]: Without dead ends: 1051 [2020-12-22 09:45:19,811 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 09:45:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2020-12-22 09:45:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2020-12-22 09:45:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-12-22 09:45:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2020-12-22 09:45:19,847 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2020-12-22 09:45:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:19,847 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2020-12-22 09:45:19,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:19,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2020-12-22 09:45:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:19,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:19,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:19,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:45:19,849 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:19,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:19,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:45:19,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:19,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920029102] [2020-12-22 09:45:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:19,907 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 09:45:19,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920029102] [2020-12-22 09:45:19,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:19,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:19,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380441168] [2020-12-22 09:45:19,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:19,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:19,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:19,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:19,910 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand 3 states. [2020-12-22 09:45:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:19,960 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2020-12-22 09:45:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:19,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:45:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:19,968 INFO L225 Difference]: With dead ends: 1533 [2020-12-22 09:45:19,969 INFO L226 Difference]: Without dead ends: 1267 [2020-12-22 09:45:19,970 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 09:45:19,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2020-12-22 09:45:20,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2020-12-22 09:45:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1265 states. [2020-12-22 09:45:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2020-12-22 09:45:20,014 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2020-12-22 09:45:20,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:20,015 INFO L481 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2020-12-22 09:45:20,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:20,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2020-12-22 09:45:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:45:20,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:20,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:20,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:45:20,017 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:20,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:45:20,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:20,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180027598] [2020-12-22 09:45:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:20,161 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 09:45:20,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180027598] [2020-12-22 09:45:20,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:20,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:20,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010968992] [2020-12-22 09:45:20,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:20,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:20,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:20,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:20,164 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand 6 states. [2020-12-22 09:45:20,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:20,502 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2020-12-22 09:45:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:45:20,503 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:45:20,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:20,529 INFO L225 Difference]: With dead ends: 5121 [2020-12-22 09:45:20,529 INFO L226 Difference]: Without dead ends: 4639 [2020-12-22 09:45:20,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:45:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2020-12-22 09:45:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2020-12-22 09:45:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1745 states. [2020-12-22 09:45:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2020-12-22 09:45:20,660 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2020-12-22 09:45:20,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:20,660 INFO L481 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2020-12-22 09:45:20,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:20,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2020-12-22 09:45:20,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:20,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:20,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:20,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:45:20,662 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:45:20,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:20,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215837832] [2020-12-22 09:45:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:20,748 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 09:45:20,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215837832] [2020-12-22 09:45:20,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:20,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:20,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922294219] [2020-12-22 09:45:20,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:45:20,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:20,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:45:20,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:45:20,751 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand 3 states. [2020-12-22 09:45:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:20,854 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2020-12-22 09:45:20,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:45:20,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:45:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:20,867 INFO L225 Difference]: With dead ends: 3151 [2020-12-22 09:45:20,867 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:45:20,870 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 09:45:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:45:20,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:45:20,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:45:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2020-12-22 09:45:20,977 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2020-12-22 09:45:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:20,978 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2020-12-22 09:45:20,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:45:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2020-12-22 09:45:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:45:20,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:20,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:20,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:45:20,980 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:45:20,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:20,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705294081] [2020-12-22 09:45:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:21,182 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 09:45:21,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705294081] [2020-12-22 09:45:21,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:21,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:21,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385428893] [2020-12-22 09:45:21,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:21,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:21,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:21,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:21,185 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand 6 states. [2020-12-22 09:45:21,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:21,429 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2020-12-22 09:45:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:21,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:45:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:21,442 INFO L225 Difference]: With dead ends: 3591 [2020-12-22 09:45:21,442 INFO L226 Difference]: Without dead ends: 2189 [2020-12-22 09:45:21,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:45:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2020-12-22 09:45:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2020-12-22 09:45:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:45:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2020-12-22 09:45:21,553 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2020-12-22 09:45:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:21,554 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2020-12-22 09:45:21,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2020-12-22 09:45:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:21,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:21,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:21,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:45:21,556 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:45:21,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:21,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108494861] [2020-12-22 09:45:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:21,715 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 09:45:21,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108494861] [2020-12-22 09:45:21,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:21,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:21,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329381565] [2020-12-22 09:45:21,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:21,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:21,718 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand 6 states. [2020-12-22 09:45:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:21,990 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2020-12-22 09:45:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:21,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:22,005 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:45:22,005 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:45:22,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:45:22,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:45:22,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:45:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2020-12-22 09:45:22,147 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2020-12-22 09:45:22,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:22,147 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2020-12-22 09:45:22,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2020-12-22 09:45:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:22,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:22,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:22,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:45:22,149 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:45:22,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:22,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835155945] [2020-12-22 09:45:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:22,249 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 09:45:22,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835155945] [2020-12-22 09:45:22,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:22,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:22,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748092156] [2020-12-22 09:45:22,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:22,253 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand 6 states. [2020-12-22 09:45:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:22,518 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2020-12-22 09:45:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:22,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:45:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:22,533 INFO L225 Difference]: With dead ends: 3589 [2020-12-22 09:45:22,533 INFO L226 Difference]: Without dead ends: 2187 [2020-12-22 09:45:22,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-12-22 09:45:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2020-12-22 09:45:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2020-12-22 09:45:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2020-12-22 09:45:22,686 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2020-12-22 09:45:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:22,686 INFO L481 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2020-12-22 09:45:22,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2020-12-22 09:45:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:45:22,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:22,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:22,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:45:22,688 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:45:22,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:22,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694629945] [2020-12-22 09:45:22,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:22,787 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 09:45:22,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694629945] [2020-12-22 09:45:22,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:22,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:45:22,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135737799] [2020-12-22 09:45:22,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:45:22,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:22,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:45:22,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:45:22,790 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand 5 states. [2020-12-22 09:45:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:23,086 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2020-12-22 09:45:23,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:45:23,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:45:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:23,106 INFO L225 Difference]: With dead ends: 3418 [2020-12-22 09:45:23,106 INFO L226 Difference]: Without dead ends: 3416 [2020-12-22 09:45:23,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:45:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2020-12-22 09:45:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2020-12-22 09:45:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2283 states. [2020-12-22 09:45:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2020-12-22 09:45:23,269 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2020-12-22 09:45:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:23,269 INFO L481 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2020-12-22 09:45:23,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:45:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2020-12-22 09:45:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:45:23,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:23,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:23,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:45:23,280 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:23,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1748179653, now seen corresponding path program 1 times [2020-12-22 09:45:23,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:23,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466544294] [2020-12-22 09:45:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:23,454 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 09:45:23,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466544294] [2020-12-22 09:45:23,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:23,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:45:23,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595265314] [2020-12-22 09:45:23,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:45:23,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:45:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:45:23,457 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand 4 states. [2020-12-22 09:45:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:35,105 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2020-12-22 09:45:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:45:35,106 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 09:45:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:35,153 INFO L225 Difference]: With dead ends: 4538 [2020-12-22 09:45:35,153 INFO L226 Difference]: Without dead ends: 3785 [2020-12-22 09:45:35,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 09:45:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2020-12-22 09:45:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2020-12-22 09:45:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3785 states. [2020-12-22 09:45:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5685 transitions. [2020-12-22 09:45:35,379 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5685 transitions. Word has length 60 [2020-12-22 09:45:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:35,379 INFO L481 AbstractCegarLoop]: Abstraction has 3785 states and 5685 transitions. [2020-12-22 09:45:35,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:45:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5685 transitions. [2020-12-22 09:45:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:35,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:35,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:35,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:45:35,383 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:35,384 INFO L82 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2020-12-22 09:45:35,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:35,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255987439] [2020-12-22 09:45:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:45:35,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255987439] [2020-12-22 09:45:35,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:35,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:35,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167828692] [2020-12-22 09:45:35,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:35,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:35,505 INFO L87 Difference]: Start difference. First operand 3785 states and 5685 transitions. Second operand 6 states. [2020-12-22 09:45:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:36,289 INFO L93 Difference]: Finished difference Result 10091 states and 14454 transitions. [2020-12-22 09:45:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:36,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:36,318 INFO L225 Difference]: With dead ends: 10091 [2020-12-22 09:45:36,318 INFO L226 Difference]: Without dead ends: 8593 [2020-12-22 09:45:36,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:36,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2020-12-22 09:45:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2020-12-22 09:45:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5281 states. [2020-12-22 09:45:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7749 transitions. [2020-12-22 09:45:36,761 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7749 transitions. Word has length 79 [2020-12-22 09:45:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:36,762 INFO L481 AbstractCegarLoop]: Abstraction has 5281 states and 7749 transitions. [2020-12-22 09:45:36,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7749 transitions. [2020-12-22 09:45:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:36,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:36,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:36,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:45:36,765 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2020-12-22 09:45:36,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:36,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131271104] [2020-12-22 09:45:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:45:36,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131271104] [2020-12-22 09:45:36,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:36,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:36,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575471280] [2020-12-22 09:45:36,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:36,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:36,876 INFO L87 Difference]: Start difference. First operand 5281 states and 7749 transitions. Second operand 6 states. [2020-12-22 09:45:37,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:37,551 INFO L93 Difference]: Finished difference Result 11587 states and 16518 transitions. [2020-12-22 09:45:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:37,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:37,578 INFO L225 Difference]: With dead ends: 11587 [2020-12-22 09:45:37,578 INFO L226 Difference]: Without dead ends: 10089 [2020-12-22 09:45:37,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2020-12-22 09:45:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2020-12-22 09:45:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 09:45:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10825 transitions. [2020-12-22 09:45:38,145 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10825 transitions. Word has length 79 [2020-12-22 09:45:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:38,145 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 10825 transitions. [2020-12-22 09:45:38,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10825 transitions. [2020-12-22 09:45:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:38,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:38,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:38,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:45:38,149 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:38,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2020-12-22 09:45:38,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:38,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703512204] [2020-12-22 09:45:38,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:45:38,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703512204] [2020-12-22 09:45:38,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:38,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:38,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290940923] [2020-12-22 09:45:38,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:38,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:38,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:38,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:38,289 INFO L87 Difference]: Start difference. First operand 7529 states and 10825 transitions. Second operand 6 states. [2020-12-22 09:45:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:39,018 INFO L93 Difference]: Finished difference Result 13083 states and 18582 transitions. [2020-12-22 09:45:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:39,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:39,046 INFO L225 Difference]: With dead ends: 13083 [2020-12-22 09:45:39,046 INFO L226 Difference]: Without dead ends: 11585 [2020-12-22 09:45:39,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:39,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2020-12-22 09:45:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2020-12-22 09:45:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9025 states. [2020-12-22 09:45:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12889 transitions. [2020-12-22 09:45:39,639 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12889 transitions. Word has length 79 [2020-12-22 09:45:39,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:39,640 INFO L481 AbstractCegarLoop]: Abstraction has 9025 states and 12889 transitions. [2020-12-22 09:45:39,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12889 transitions. [2020-12-22 09:45:39,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:45:39,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:39,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:39,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:45:39,644 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:39,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:39,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2020-12-22 09:45:39,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:39,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663582303] [2020-12-22 09:45:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:45:39,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663582303] [2020-12-22 09:45:39,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:45:39,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:45:39,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102861162] [2020-12-22 09:45:39,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:45:39,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:39,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:45:39,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:45:39,740 INFO L87 Difference]: Start difference. First operand 9025 states and 12889 transitions. Second operand 6 states. [2020-12-22 09:45:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:45:40,522 INFO L93 Difference]: Finished difference Result 13699 states and 19446 transitions. [2020-12-22 09:45:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:45:40,522 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-12-22 09:45:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:45:40,552 INFO L225 Difference]: With dead ends: 13699 [2020-12-22 09:45:40,553 INFO L226 Difference]: Without dead ends: 12641 [2020-12-22 09:45:40,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:45:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2020-12-22 09:45:41,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2020-12-22 09:45:41,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10081 states. [2020-12-22 09:45:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14361 transitions. [2020-12-22 09:45:41,109 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14361 transitions. Word has length 79 [2020-12-22 09:45:41,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:45:41,110 INFO L481 AbstractCegarLoop]: Abstraction has 10081 states and 14361 transitions. [2020-12-22 09:45:41,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:45:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14361 transitions. [2020-12-22 09:45:41,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:45:41,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:45:41,114 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:45:41,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:45:41,114 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:45:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:45:41,115 INFO L82 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2020-12-22 09:45:41,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:45:41,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266396462] [2020-12-22 09:45:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:45:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:41,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266396462] [2020-12-22 09:45:41,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599245327] [2020-12-22 09:45:41,363 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 09:45:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:45:41,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:45:41,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:45:41,756 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:45:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:45:42,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:45:42,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 09:45:42,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167541494] [2020-12-22 09:45:42,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 09:45:42,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:45:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 09:45:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:45:42,209 INFO L87 Difference]: Start difference. First operand 10081 states and 14361 transitions. Second operand 18 states. [2020-12-22 09:45:42,344 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:43,362 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 09:45:44,419 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:44,785 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:45,967 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:46,600 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:45:52,525 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:52,689 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:45:53,590 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:45:53,836 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:45:54,017 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:45:54,728 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:45:56,438 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:57,046 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:45:57,171 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:45:57,495 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:01,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:01,880 INFO L93 Difference]: Finished difference Result 86701 states and 118456 transitions. [2020-12-22 09:46:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:46:01,881 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-12-22 09:46:01,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:02,052 INFO L225 Difference]: With dead ends: 86701 [2020-12-22 09:46:02,052 INFO L226 Difference]: Without dead ends: 78907 [2020-12-22 09:46:02,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6416 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 09:46:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78907 states. [2020-12-22 09:46:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78907 to 36697. [2020-12-22 09:46:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36697 states. [2020-12-22 09:46:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36697 states to 36697 states and 50879 transitions. [2020-12-22 09:46:05,714 INFO L78 Accepts]: Start accepts. Automaton has 36697 states and 50879 transitions. Word has length 80 [2020-12-22 09:46:05,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:05,714 INFO L481 AbstractCegarLoop]: Abstraction has 36697 states and 50879 transitions. [2020-12-22 09:46:05,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 09:46:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 36697 states and 50879 transitions. [2020-12-22 09:46:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:05,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:05,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:05,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:46:05,937 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash -808690280, now seen corresponding path program 1 times [2020-12-22 09:46:05,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:05,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579776640] [2020-12-22 09:46:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:06,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579776640] [2020-12-22 09:46:06,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:46:06,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:46:06,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765489322] [2020-12-22 09:46:06,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:46:06,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:06,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:46:06,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:46:06,017 INFO L87 Difference]: Start difference. First operand 36697 states and 50879 transitions. Second operand 3 states. [2020-12-22 09:46:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:46:09,156 INFO L93 Difference]: Finished difference Result 71109 states and 98163 transitions. [2020-12-22 09:46:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:46:09,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:46:09,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:46:09,231 INFO L225 Difference]: With dead ends: 71109 [2020-12-22 09:46:09,231 INFO L226 Difference]: Without dead ends: 36699 [2020-12-22 09:46:09,283 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 09:46:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36699 states. [2020-12-22 09:46:12,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36699 to 35737. [2020-12-22 09:46:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35737 states. [2020-12-22 09:46:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35737 states to 35737 states and 48839 transitions. [2020-12-22 09:46:12,468 INFO L78 Accepts]: Start accepts. Automaton has 35737 states and 48839 transitions. Word has length 81 [2020-12-22 09:46:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:46:12,468 INFO L481 AbstractCegarLoop]: Abstraction has 35737 states and 48839 transitions. [2020-12-22 09:46:12,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:46:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 35737 states and 48839 transitions. [2020-12-22 09:46:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:46:12,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:46:12,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:46:12,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:46:12,472 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:46:12,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:46:12,473 INFO L82 PathProgramCache]: Analyzing trace with hash 188383332, now seen corresponding path program 1 times [2020-12-22 09:46:12,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:46:12,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382173663] [2020-12-22 09:46:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:46:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:12,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382173663] [2020-12-22 09:46:12,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561052729] [2020-12-22 09:46:12,776 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 09:46:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:46:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:46:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:46:13,218 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:46:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:46:13,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:46:13,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-22 09:46:13,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747028915] [2020-12-22 09:46:13,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 09:46:13,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:46:13,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 09:46:13,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:46:13,605 INFO L87 Difference]: Start difference. First operand 35737 states and 48839 transitions. Second operand 19 states. [2020-12-22 09:46:13,782 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:13,914 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:46:14,067 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:46:14,385 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:46:14,563 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:15,005 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 09:46:15,180 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:15,422 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:15,685 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:46:16,587 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:16,845 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:17,099 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:17,747 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:21,580 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:21,880 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:22,016 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:22,437 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:23,169 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:23,416 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:23,764 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:24,132 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:24,668 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:25,057 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:46:25,246 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:25,682 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:46:27,771 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:28,274 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-12-22 09:46:33,726 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:34,206 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:34,380 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 09:46:35,239 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:35,533 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:46:36,376 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 09:46:36,554 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:46,237 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:46,912 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:51,039 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:46:51,656 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:46:56,724 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:47:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:02,113 INFO L93 Difference]: Finished difference Result 372820 states and 496109 transitions. [2020-12-22 09:47:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-12-22 09:47:02,114 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2020-12-22 09:47:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:03,017 INFO L225 Difference]: With dead ends: 372820 [2020-12-22 09:47:03,017 INFO L226 Difference]: Without dead ends: 339370 [2020-12-22 09:47:03,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6674 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=2822, Invalid=15538, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 09:47:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339370 states. [2020-12-22 09:47:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339370 to 167235. [2020-12-22 09:47:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167235 states. [2020-12-22 09:47:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167235 states to 167235 states and 224959 transitions. [2020-12-22 09:47:22,453 INFO L78 Accepts]: Start accepts. Automaton has 167235 states and 224959 transitions. Word has length 81 [2020-12-22 09:47:22,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:22,453 INFO L481 AbstractCegarLoop]: Abstraction has 167235 states and 224959 transitions. [2020-12-22 09:47:22,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 09:47:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 167235 states and 224959 transitions. [2020-12-22 09:47:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:22,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:22,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:22,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:47:22,676 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:22,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:22,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1744161872, now seen corresponding path program 1 times [2020-12-22 09:47:22,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:22,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098073397] [2020-12-22 09:47:22,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:22,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098073397] [2020-12-22 09:47:22,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:22,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:22,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238988508] [2020-12-22 09:47:22,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:22,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:22,773 INFO L87 Difference]: Start difference. First operand 167235 states and 224959 transitions. Second operand 3 states. [2020-12-22 09:47:32,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:32,493 INFO L93 Difference]: Finished difference Result 258799 states and 347475 transitions. [2020-12-22 09:47:32,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:32,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:32,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:32,646 INFO L225 Difference]: With dead ends: 258799 [2020-12-22 09:47:32,646 INFO L226 Difference]: Without dead ends: 93851 [2020-12-22 09:47:32,802 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 09:47:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93851 states. [2020-12-22 09:47:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93851 to 93849. [2020-12-22 09:47:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93849 states. [2020-12-22 09:47:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93849 states to 93849 states and 124415 transitions. [2020-12-22 09:47:41,971 INFO L78 Accepts]: Start accepts. Automaton has 93849 states and 124415 transitions. Word has length 81 [2020-12-22 09:47:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:41,971 INFO L481 AbstractCegarLoop]: Abstraction has 93849 states and 124415 transitions. [2020-12-22 09:47:41,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 93849 states and 124415 transitions. [2020-12-22 09:47:41,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:41,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:41,976 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:41,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:47:41,976 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:41,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1394309904, now seen corresponding path program 1 times [2020-12-22 09:47:41,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:41,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764400101] [2020-12-22 09:47:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:47:42,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764400101] [2020-12-22 09:47:42,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:42,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:47:42,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402100484] [2020-12-22 09:47:42,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:47:42,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:47:42,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:47:42,032 INFO L87 Difference]: Start difference. First operand 93849 states and 124415 transitions. Second operand 3 states. [2020-12-22 09:47:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:47,005 INFO L93 Difference]: Finished difference Result 135830 states and 180283 transitions. [2020-12-22 09:47:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:47:47,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:47:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:47,070 INFO L225 Difference]: With dead ends: 135830 [2020-12-22 09:47:47,070 INFO L226 Difference]: Without dead ends: 44268 [2020-12-22 09:47:47,114 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 09:47:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44268 states. [2020-12-22 09:47:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44268 to 44242. [2020-12-22 09:47:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44242 states. [2020-12-22 09:47:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44242 states to 44242 states and 58643 transitions. [2020-12-22 09:47:51,439 INFO L78 Accepts]: Start accepts. Automaton has 44242 states and 58643 transitions. Word has length 81 [2020-12-22 09:47:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:51,440 INFO L481 AbstractCegarLoop]: Abstraction has 44242 states and 58643 transitions. [2020-12-22 09:47:51,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:47:51,440 INFO L276 IsEmpty]: Start isEmpty. Operand 44242 states and 58643 transitions. [2020-12-22 09:47:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:51,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:51,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:51,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:47:51,445 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:51,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1995112228, now seen corresponding path program 1 times [2020-12-22 09:47:51,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:51,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76384072] [2020-12-22 09:47:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:47:51,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76384072] [2020-12-22 09:47:51,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:51,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:51,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449768897] [2020-12-22 09:47:51,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:51,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:51,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:51,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:51,536 INFO L87 Difference]: Start difference. First operand 44242 states and 58643 transitions. Second operand 6 states. [2020-12-22 09:47:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:54,560 INFO L93 Difference]: Finished difference Result 67564 states and 89213 transitions. [2020-12-22 09:47:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:54,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:54,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:54,593 INFO L225 Difference]: With dead ends: 67564 [2020-12-22 09:47:54,594 INFO L226 Difference]: Without dead ends: 25646 [2020-12-22 09:47:54,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:54,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25646 states. [2020-12-22 09:47:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25646 to 25646. [2020-12-22 09:47:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25646 states. [2020-12-22 09:47:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25646 states to 25646 states and 33808 transitions. [2020-12-22 09:47:57,089 INFO L78 Accepts]: Start accepts. Automaton has 25646 states and 33808 transitions. Word has length 81 [2020-12-22 09:47:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:47:57,090 INFO L481 AbstractCegarLoop]: Abstraction has 25646 states and 33808 transitions. [2020-12-22 09:47:57,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:47:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 25646 states and 33808 transitions. [2020-12-22 09:47:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:47:57,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:47:57,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:47:57,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:47:57,094 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:47:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:47:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash 259210172, now seen corresponding path program 1 times [2020-12-22 09:47:57,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:47:57,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568160305] [2020-12-22 09:47:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:47:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:47:57,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 09:47:57,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568160305] [2020-12-22 09:47:57,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:47:57,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:47:57,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698308568] [2020-12-22 09:47:57,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:47:57,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:47:57,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:47:57,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:47:57,195 INFO L87 Difference]: Start difference. First operand 25646 states and 33808 transitions. Second operand 6 states. [2020-12-22 09:47:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:47:59,684 INFO L93 Difference]: Finished difference Result 44216 states and 57943 transitions. [2020-12-22 09:47:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:47:59,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-22 09:47:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:47:59,716 INFO L225 Difference]: With dead ends: 44216 [2020-12-22 09:47:59,716 INFO L226 Difference]: Without dead ends: 20876 [2020-12-22 09:47:59,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:47:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20876 states. [2020-12-22 09:48:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20876 to 20876. [2020-12-22 09:48:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20876 states. [2020-12-22 09:48:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20876 states to 20876 states and 27486 transitions. [2020-12-22 09:48:01,898 INFO L78 Accepts]: Start accepts. Automaton has 20876 states and 27486 transitions. Word has length 81 [2020-12-22 09:48:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:01,898 INFO L481 AbstractCegarLoop]: Abstraction has 20876 states and 27486 transitions. [2020-12-22 09:48:01,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 20876 states and 27486 transitions. [2020-12-22 09:48:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:01,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:01,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:01,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:48:01,900 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:01,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:01,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1802178222, now seen corresponding path program 1 times [2020-12-22 09:48:01,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:01,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835484795] [2020-12-22 09:48:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835484795] [2020-12-22 09:48:01,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:01,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:01,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433018717] [2020-12-22 09:48:01,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:01,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:01,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:01,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:01,965 INFO L87 Difference]: Start difference. First operand 20876 states and 27486 transitions. Second operand 3 states. [2020-12-22 09:48:02,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:02,930 INFO L93 Difference]: Finished difference Result 30252 states and 39456 transitions. [2020-12-22 09:48:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:02,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 09:48:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:02,947 INFO L225 Difference]: With dead ends: 30252 [2020-12-22 09:48:02,947 INFO L226 Difference]: Without dead ends: 11682 [2020-12-22 09:48:02,959 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 09:48:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2020-12-22 09:48:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 11680. [2020-12-22 09:48:04,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11680 states. [2020-12-22 09:48:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 15408 transitions. [2020-12-22 09:48:04,048 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 15408 transitions. Word has length 82 [2020-12-22 09:48:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:04,049 INFO L481 AbstractCegarLoop]: Abstraction has 11680 states and 15408 transitions. [2020-12-22 09:48:04,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 15408 transitions. [2020-12-22 09:48:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:04,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:04,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:04,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:48:04,050 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:04,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2020-12-22 09:48:04,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:04,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982780842] [2020-12-22 09:48:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:04,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982780842] [2020-12-22 09:48:04,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431480672] [2020-12-22 09:48:04,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 09:48:04,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:06,107 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 09:48:07,027 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:48:07,401 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-22 09:48:07,659 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:48:07,962 INFO L639 QuantifierPusher]: Distributing 4 conjuncts over 2 disjuncts [2020-12-22 09:48:08,370 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-22 09:48:08,670 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:48:08,676 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:08,704 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:08,711 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:08,712 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:08,715 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:08,727 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 09:48:08,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:09,717 WARN L197 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-12-22 09:48:10,185 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:48:10,633 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2020-12-22 09:48:10,659 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:10,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:14,112 WARN L197 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 4197 DAG size of output: 3666 [2020-12-22 09:48:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:14,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:14,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 39 [2020-12-22 09:48:14,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685825656] [2020-12-22 09:48:14,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:48:14,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:14,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:48:14,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:48:14,666 INFO L87 Difference]: Start difference. First operand 11680 states and 15408 transitions. Second operand 39 states. [2020-12-22 09:48:16,187 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2020-12-22 09:48:16,443 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-12-22 09:48:16,666 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2020-12-22 09:48:16,960 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2020-12-22 09:48:17,344 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2020-12-22 09:48:17,943 WARN L197 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-12-22 09:48:18,381 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2020-12-22 09:48:18,854 WARN L197 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-12-22 09:48:19,328 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 62 [2020-12-22 09:48:19,864 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-12-22 09:48:20,472 WARN L197 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2020-12-22 09:48:21,055 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 66 [2020-12-22 09:48:21,676 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 72 [2020-12-22 09:48:22,315 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 74 [2020-12-22 09:48:23,221 WARN L197 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-12-22 09:48:24,096 WARN L197 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-12-22 09:48:25,775 WARN L197 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 142 DAG size of output: 111 [2020-12-22 09:48:26,611 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-12-22 09:48:28,085 WARN L197 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 139 DAG size of output: 108 [2020-12-22 09:48:29,142 WARN L197 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-12-22 09:48:29,868 WARN L197 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-12-22 09:48:30,515 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2020-12-22 09:48:30,774 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:31,432 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-12-22 09:48:31,986 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-12-22 09:48:32,465 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:48:32,859 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:34,706 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-22 09:48:34,964 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:48:35,419 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:48:36,730 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-12-22 09:48:37,397 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2020-12-22 09:48:37,892 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-22 09:48:38,312 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 09:48:39,702 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-12-22 09:48:40,148 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 09:48:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,205 INFO L93 Difference]: Finished difference Result 25221 states and 32037 transitions. [2020-12-22 09:48:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 09:48:43,207 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-12-22 09:48:43,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,232 INFO L225 Difference]: With dead ends: 25221 [2020-12-22 09:48:43,232 INFO L226 Difference]: Without dead ends: 21811 [2020-12-22 09:48:43,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1679, Invalid=6511, Unknown=0, NotChecked=0, Total=8190 [2020-12-22 09:48:43,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21811 states. [2020-12-22 09:48:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21811 to 11132. [2020-12-22 09:48:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11132 states. [2020-12-22 09:48:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11132 states to 11132 states and 14680 transitions. [2020-12-22 09:48:44,475 INFO L78 Accepts]: Start accepts. Automaton has 11132 states and 14680 transitions. Word has length 83 [2020-12-22 09:48:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:44,475 INFO L481 AbstractCegarLoop]: Abstraction has 11132 states and 14680 transitions. [2020-12-22 09:48:44,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:48:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 11132 states and 14680 transitions. [2020-12-22 09:48:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:48:44,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:44,476 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:44,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:48:44,680 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash -852701794, now seen corresponding path program 1 times [2020-12-22 09:48:44,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:44,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137786490] [2020-12-22 09:48:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:45,302 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 09:48:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:45,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137786490] [2020-12-22 09:48:45,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558926102] [2020-12-22 09:48:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 09:48:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:45,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 09:48:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:47,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:47,784 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-12-22 09:48:48,262 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:48:48,562 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:48:49,051 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 09:48:49,063 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:49,585 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-22 09:48:50,010 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-12-22 09:48:50,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:50,036 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:50,039 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:50,585 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 34 [2020-12-22 09:48:50,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:48:50,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:50,925 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:50,927 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:48:51,698 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-12-22 09:48:52,111 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-12-22 09:48:52,685 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:48:52,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:52,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:52,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2020-12-22 09:48:52,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560580306] [2020-12-22 09:48:52,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 09:48:52,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:52,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 09:48:52,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:48:52,791 INFO L87 Difference]: Start difference. First operand 11132 states and 14680 transitions. Second operand 37 states. [2020-12-22 09:48:53,027 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2020-12-22 09:48:54,035 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2020-12-22 09:48:54,276 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-12-22 09:48:54,586 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2020-12-22 09:48:54,916 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27