/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.5.1.ufo.BOUNDED-10.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:52:10,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:52:10,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:52:10,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:52:10,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:52:10,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:52:10,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:52:10,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:52:10,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:52:10,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:52:10,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:52:10,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:52:10,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:52:10,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:52:10,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:52:10,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:52:10,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:52:10,171 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:52:10,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:52:10,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:52:10,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:52:10,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:52:10,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:52:10,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:52:10,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:52:10,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:52:10,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:52:10,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:52:10,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:52:10,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:52:10,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:52:10,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:52:10,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:52:10,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:52:10,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:52:10,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:52:10,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:52:10,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:52:10,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:52:10,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:52:10,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:52:10,267 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:52:10,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:52:10,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:52:10,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:52:10,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:52:10,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:52:10,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:52:10,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:52:10,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:52:10,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:52:10,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:52:10,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:52:10,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:52:10,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:52:10,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:52:10,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:52:10,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:52:10,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:52:10,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:52:10,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:52:10,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:52:10,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:52:10,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:52:10,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:52:10,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:52:10,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:52:10,758 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:52:10,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label09.c [2020-12-22 09:52:10,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d9dd12a5/90704ddcbe574b89ba2cc563dd0d94b7/FLAGb5148f61f [2020-12-22 09:52:11,835 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:52:11,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label09.c [2020-12-22 09:52:11,887 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d9dd12a5/90704ddcbe574b89ba2cc563dd0d94b7/FLAGb5148f61f [2020-12-22 09:52:12,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d9dd12a5/90704ddcbe574b89ba2cc563dd0d94b7 [2020-12-22 09:52:12,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:52:12,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:52:12,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:12,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:52:12,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:52:12,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:12" (1/1) ... [2020-12-22 09:52:12,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f06735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:12, skipping insertion in model container [2020-12-22 09:52:12,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:12" (1/1) ... [2020-12-22 09:52:12,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:52:12,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:52:12,788 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.5.1.ufo.BOUNDED-10.pals+Problem12_label09.c[11767,11780] [2020-12-22 09:52:12,853 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.5.1.ufo.BOUNDED-10.pals+Problem12_label09.c[19272,19285] [2020-12-22 09:52:13,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:13,775 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:52:13,855 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.5.1.ufo.BOUNDED-10.pals+Problem12_label09.c[11767,11780] [2020-12-22 09:52:13,878 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.5.1.ufo.BOUNDED-10.pals+Problem12_label09.c[19272,19285] [2020-12-22 09:52:14,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:14,666 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:52:14,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14 WrapperNode [2020-12-22 09:52:14,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:14,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:14,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:52:14,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:52:14,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:14,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:15,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:15,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:52:15,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:52:15,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:52:15,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:15,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:15,374 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:15,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:15,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:15,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:15,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (1/1) ... [2020-12-22 09:52:15,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:52:15,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:52:15,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:52:15,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:52:15,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (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 09:52:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:52:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:52:15,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:52:15,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:52:22,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:52:22,193 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:52:22,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:22 BoogieIcfgContainer [2020-12-22 09:52:22,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:52:22,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:52:22,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:52:22,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:52:22,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:52:12" (1/3) ... [2020-12-22 09:52:22,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8093af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:22, skipping insertion in model container [2020-12-22 09:52:22,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:14" (2/3) ... [2020-12-22 09:52:22,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8093af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:22, skipping insertion in model container [2020-12-22 09:52:22,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:22" (3/3) ... [2020-12-22 09:52:22,206 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label09.c [2020-12-22 09:52:22,212 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:52:22,226 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:52:22,245 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:52:22,278 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:52:22,278 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:52:22,279 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:52:22,279 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:52:22,280 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:52:22,280 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:52:22,280 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:52:22,281 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:52:22,329 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:52:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:22,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:22,339 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] [2020-12-22 09:52:22,340 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:22,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:22,346 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:52:22,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:22,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509650316] [2020-12-22 09:52:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:22,629 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 09:52:22,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509650316] [2020-12-22 09:52:22,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:22,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:22,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8010799] [2020-12-22 09:52:22,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:52:22,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:22,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:52:22,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:52:22,655 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 2 states. [2020-12-22 09:52:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:22,740 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2020-12-22 09:52:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:52:22,742 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:52:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:22,768 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:52:22,768 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:52:22,777 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 09:52:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:52:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:52:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:52:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2020-12-22 09:52:22,907 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2020-12-22 09:52:22,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:22,907 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2020-12-22 09:52:22,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:52:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2020-12-22 09:52:22,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:22,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:22,913 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] [2020-12-22 09:52:22,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:52:22,914 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:52:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:22,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772529486] [2020-12-22 09:52:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:23,122 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 09:52:23,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772529486] [2020-12-22 09:52:23,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:23,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:23,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291458639] [2020-12-22 09:52:23,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:23,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:23,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:23,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:23,127 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand 5 states. [2020-12-22 09:52:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:23,273 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2020-12-22 09:52:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:52:23,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:52:23,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:23,279 INFO L225 Difference]: With dead ends: 899 [2020-12-22 09:52:23,280 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:52:23,281 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 09:52:23,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:52:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:52:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:52:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2020-12-22 09:52:23,304 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2020-12-22 09:52:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:23,304 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2020-12-22 09:52:23,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2020-12-22 09:52:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:23,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:23,307 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, 1, 1, 1, 1] [2020-12-22 09:52:23,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:52:23,308 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:23,308 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:52:23,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:23,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001780317] [2020-12-22 09:52:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:23,430 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 09:52:23,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001780317] [2020-12-22 09:52:23,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:23,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:23,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022628694] [2020-12-22 09:52:23,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:23,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:23,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:23,440 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand 3 states. [2020-12-22 09:52:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:23,483 INFO L93 Difference]: Finished difference Result 941 states and 1712 transitions. [2020-12-22 09:52:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:23,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:23,491 INFO L225 Difference]: With dead ends: 941 [2020-12-22 09:52:23,491 INFO L226 Difference]: Without dead ends: 889 [2020-12-22 09:52:23,492 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 09:52:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-12-22 09:52:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 887. [2020-12-22 09:52:23,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2020-12-22 09:52:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1628 transitions. [2020-12-22 09:52:23,584 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1628 transitions. Word has length 64 [2020-12-22 09:52:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:23,584 INFO L481 AbstractCegarLoop]: Abstraction has 887 states and 1628 transitions. [2020-12-22 09:52:23,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1628 transitions. [2020-12-22 09:52:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:23,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:23,589 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, 1, 1, 1, 1] [2020-12-22 09:52:23,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:52:23,590 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:52:23,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:23,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125578456] [2020-12-22 09:52:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:23,753 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 09:52:23,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125578456] [2020-12-22 09:52:23,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:23,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:23,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298064598] [2020-12-22 09:52:23,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:23,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:23,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:23,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:23,757 INFO L87 Difference]: Start difference. First operand 887 states and 1628 transitions. Second operand 3 states. [2020-12-22 09:52:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:23,805 INFO L93 Difference]: Finished difference Result 1067 states and 1912 transitions. [2020-12-22 09:52:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:23,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:23,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:23,812 INFO L225 Difference]: With dead ends: 1067 [2020-12-22 09:52:23,813 INFO L226 Difference]: Without dead ends: 971 [2020-12-22 09:52:23,813 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 09:52:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2020-12-22 09:52:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 969. [2020-12-22 09:52:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 969 states. [2020-12-22 09:52:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1757 transitions. [2020-12-22 09:52:23,845 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1757 transitions. Word has length 64 [2020-12-22 09:52:23,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:23,846 INFO L481 AbstractCegarLoop]: Abstraction has 969 states and 1757 transitions. [2020-12-22 09:52:23,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1757 transitions. [2020-12-22 09:52:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:23,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:23,848 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, 1, 1, 1, 1] [2020-12-22 09:52:23,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:52:23,849 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:52:23,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:23,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202998626] [2020-12-22 09:52:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:23,929 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 09:52:23,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202998626] [2020-12-22 09:52:23,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:23,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:23,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604638295] [2020-12-22 09:52:23,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:23,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:23,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:23,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:23,932 INFO L87 Difference]: Start difference. First operand 969 states and 1757 transitions. Second operand 3 states. [2020-12-22 09:52:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:23,988 INFO L93 Difference]: Finished difference Result 1301 states and 2279 transitions. [2020-12-22 09:52:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:23,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:23,996 INFO L225 Difference]: With dead ends: 1301 [2020-12-22 09:52:23,997 INFO L226 Difference]: Without dead ends: 1123 [2020-12-22 09:52:23,998 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 09:52:24,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2020-12-22 09:52:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1121. [2020-12-22 09:52:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1121 states. [2020-12-22 09:52:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1993 transitions. [2020-12-22 09:52:24,037 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1993 transitions. Word has length 64 [2020-12-22 09:52:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:24,038 INFO L481 AbstractCegarLoop]: Abstraction has 1121 states and 1993 transitions. [2020-12-22 09:52:24,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1993 transitions. [2020-12-22 09:52:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:24,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:24,040 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, 1, 1, 1, 1] [2020-12-22 09:52:24,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:52:24,040 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:52:24,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:24,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72013387] [2020-12-22 09:52:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:24,144 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 09:52:24,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72013387] [2020-12-22 09:52:24,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:24,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:24,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694681370] [2020-12-22 09:52:24,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:24,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:24,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:24,148 INFO L87 Difference]: Start difference. First operand 1121 states and 1993 transitions. Second operand 3 states. [2020-12-22 09:52:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:24,212 INFO L93 Difference]: Finished difference Result 1733 states and 2947 transitions. [2020-12-22 09:52:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:24,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:24,222 INFO L225 Difference]: With dead ends: 1733 [2020-12-22 09:52:24,222 INFO L226 Difference]: Without dead ends: 1403 [2020-12-22 09:52:24,223 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 09:52:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2020-12-22 09:52:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1401. [2020-12-22 09:52:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1401 states. [2020-12-22 09:52:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 2421 transitions. [2020-12-22 09:52:24,275 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 2421 transitions. Word has length 64 [2020-12-22 09:52:24,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:24,276 INFO L481 AbstractCegarLoop]: Abstraction has 1401 states and 2421 transitions. [2020-12-22 09:52:24,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 2421 transitions. [2020-12-22 09:52:24,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:24,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:24,277 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, 1, 1, 1, 1] [2020-12-22 09:52:24,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:52:24,278 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:24,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:24,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:52:24,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:24,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986903505] [2020-12-22 09:52:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:24,344 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 09:52:24,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986903505] [2020-12-22 09:52:24,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:24,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:24,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297593966] [2020-12-22 09:52:24,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:24,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:24,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:24,347 INFO L87 Difference]: Start difference. First operand 1401 states and 2421 transitions. Second operand 3 states. [2020-12-22 09:52:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:24,426 INFO L93 Difference]: Finished difference Result 2525 states and 4151 transitions. [2020-12-22 09:52:24,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:24,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:24,439 INFO L225 Difference]: With dead ends: 2525 [2020-12-22 09:52:24,439 INFO L226 Difference]: Without dead ends: 1915 [2020-12-22 09:52:24,441 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 09:52:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2020-12-22 09:52:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1913. [2020-12-22 09:52:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1913 states. [2020-12-22 09:52:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3189 transitions. [2020-12-22 09:52:24,517 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3189 transitions. Word has length 64 [2020-12-22 09:52:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:24,517 INFO L481 AbstractCegarLoop]: Abstraction has 1913 states and 3189 transitions. [2020-12-22 09:52:24,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3189 transitions. [2020-12-22 09:52:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:24,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:24,519 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, 1, 1, 1, 1] [2020-12-22 09:52:24,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:52:24,520 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:24,520 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:52:24,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:24,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950663391] [2020-12-22 09:52:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:24,665 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 09:52:24,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950663391] [2020-12-22 09:52:24,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:24,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:24,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827144611] [2020-12-22 09:52:24,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:24,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:24,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:24,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:24,668 INFO L87 Difference]: Start difference. First operand 1913 states and 3189 transitions. Second operand 7 states. [2020-12-22 09:52:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:25,467 INFO L93 Difference]: Finished difference Result 13133 states and 20319 transitions. [2020-12-22 09:52:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:52:25,467 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:52:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:25,531 INFO L225 Difference]: With dead ends: 13133 [2020-12-22 09:52:25,531 INFO L226 Difference]: Without dead ends: 12011 [2020-12-22 09:52:25,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:52:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12011 states. [2020-12-22 09:52:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12011 to 3033. [2020-12-22 09:52:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3033 states. [2020-12-22 09:52:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 4837 transitions. [2020-12-22 09:52:25,786 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 4837 transitions. Word has length 64 [2020-12-22 09:52:25,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:25,788 INFO L481 AbstractCegarLoop]: Abstraction has 3033 states and 4837 transitions. [2020-12-22 09:52:25,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:25,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 4837 transitions. [2020-12-22 09:52:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:25,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:25,790 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:25,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:52:25,790 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:25,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:52:25,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:25,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916602504] [2020-12-22 09:52:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:25,888 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 09:52:25,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916602504] [2020-12-22 09:52:25,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:25,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:25,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312184309] [2020-12-22 09:52:25,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:25,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:25,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:25,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:25,891 INFO L87 Difference]: Start difference. First operand 3033 states and 4837 transitions. Second operand 3 states. [2020-12-22 09:52:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:26,099 INFO L93 Difference]: Finished difference Result 6319 states and 9753 transitions. [2020-12-22 09:52:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:26,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:52:26,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:26,137 INFO L225 Difference]: With dead ends: 6319 [2020-12-22 09:52:26,144 INFO L226 Difference]: Without dead ends: 4077 [2020-12-22 09:52:26,149 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 09:52:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2020-12-22 09:52:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 4075. [2020-12-22 09:52:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4075 states. [2020-12-22 09:52:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6343 transitions. [2020-12-22 09:52:26,366 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6343 transitions. Word has length 66 [2020-12-22 09:52:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:26,367 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 6343 transitions. [2020-12-22 09:52:26,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6343 transitions. [2020-12-22 09:52:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:26,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:26,370 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, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:26,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:52:26,370 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:26,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:26,371 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:52:26,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:26,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039680013] [2020-12-22 09:52:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:26,619 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 09:52:26,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039680013] [2020-12-22 09:52:26,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:26,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523914951] [2020-12-22 09:52:26,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:26,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:26,624 INFO L87 Difference]: Start difference. First operand 4075 states and 6343 transitions. Second operand 7 states. [2020-12-22 09:52:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:27,139 INFO L93 Difference]: Finished difference Result 7359 states and 11209 transitions. [2020-12-22 09:52:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:27,142 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:52:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:27,150 INFO L225 Difference]: With dead ends: 7359 [2020-12-22 09:52:27,151 INFO L226 Difference]: Without dead ends: 4077 [2020-12-22 09:52:27,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:52:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2020-12-22 09:52:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 4075. [2020-12-22 09:52:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4075 states. [2020-12-22 09:52:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6295 transitions. [2020-12-22 09:52:27,350 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6295 transitions. Word has length 66 [2020-12-22 09:52:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:27,350 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 6295 transitions. [2020-12-22 09:52:27,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6295 transitions. [2020-12-22 09:52:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:27,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:27,351 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:27,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:52:27,352 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:27,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:52:27,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:27,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245776018] [2020-12-22 09:52:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:27,470 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 09:52:27,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245776018] [2020-12-22 09:52:27,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:27,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:27,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886480676] [2020-12-22 09:52:27,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:27,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:27,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:27,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:27,473 INFO L87 Difference]: Start difference. First operand 4075 states and 6295 transitions. Second operand 6 states. [2020-12-22 09:52:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:27,817 INFO L93 Difference]: Finished difference Result 7357 states and 11112 transitions. [2020-12-22 09:52:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:27,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:52:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:27,828 INFO L225 Difference]: With dead ends: 7357 [2020-12-22 09:52:27,828 INFO L226 Difference]: Without dead ends: 4075 [2020-12-22 09:52:27,833 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 09:52:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-12-22 09:52:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4075. [2020-12-22 09:52:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4075 states. [2020-12-22 09:52:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6247 transitions. [2020-12-22 09:52:28,047 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6247 transitions. Word has length 67 [2020-12-22 09:52:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:28,047 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 6247 transitions. [2020-12-22 09:52:28,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6247 transitions. [2020-12-22 09:52:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:28,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:28,049 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:28,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:52:28,049 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:52:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:28,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295542408] [2020-12-22 09:52:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:28,141 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 09:52:28,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295542408] [2020-12-22 09:52:28,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:28,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:28,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600462604] [2020-12-22 09:52:28,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:28,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:28,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:28,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:28,144 INFO L87 Difference]: Start difference. First operand 4075 states and 6247 transitions. Second operand 6 states. [2020-12-22 09:52:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:28,525 INFO L93 Difference]: Finished difference Result 7357 states and 11016 transitions. [2020-12-22 09:52:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:28,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:52:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:28,535 INFO L225 Difference]: With dead ends: 7357 [2020-12-22 09:52:28,535 INFO L226 Difference]: Without dead ends: 4075 [2020-12-22 09:52:28,540 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 09:52:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-12-22 09:52:28,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 4075. [2020-12-22 09:52:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4075 states. [2020-12-22 09:52:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 6199 transitions. [2020-12-22 09:52:28,845 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 6199 transitions. Word has length 67 [2020-12-22 09:52:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:28,846 INFO L481 AbstractCegarLoop]: Abstraction has 4075 states and 6199 transitions. [2020-12-22 09:52:28,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 6199 transitions. [2020-12-22 09:52:28,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:28,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:28,847 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:28,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:52:28,847 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:52:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:28,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639374112] [2020-12-22 09:52:28,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:28,953 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 09:52:28,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639374112] [2020-12-22 09:52:28,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:28,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:28,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317587464] [2020-12-22 09:52:28,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:28,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:28,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:28,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:28,961 INFO L87 Difference]: Start difference. First operand 4075 states and 6199 transitions. Second operand 5 states. [2020-12-22 09:52:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:29,403 INFO L93 Difference]: Finished difference Result 6918 states and 10173 transitions. [2020-12-22 09:52:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:29,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:52:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:29,418 INFO L225 Difference]: With dead ends: 6918 [2020-12-22 09:52:29,419 INFO L226 Difference]: Without dead ends: 6916 [2020-12-22 09:52:29,421 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 09:52:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2020-12-22 09:52:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 4267. [2020-12-22 09:52:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4267 states. [2020-12-22 09:52:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 6375 transitions. [2020-12-22 09:52:29,705 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 6375 transitions. Word has length 67 [2020-12-22 09:52:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:29,705 INFO L481 AbstractCegarLoop]: Abstraction has 4267 states and 6375 transitions. [2020-12-22 09:52:29,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 6375 transitions. [2020-12-22 09:52:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:29,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:29,706 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:29,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:52:29,707 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:29,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:29,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2064290429, now seen corresponding path program 1 times [2020-12-22 09:52:29,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:29,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196908873] [2020-12-22 09:52:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:29,762 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 09:52:29,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196908873] [2020-12-22 09:52:29,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:29,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:29,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947130825] [2020-12-22 09:52:29,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:29,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:29,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:29,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:29,764 INFO L87 Difference]: Start difference. First operand 4267 states and 6375 transitions. Second operand 3 states. [2020-12-22 09:52:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:37,940 INFO L93 Difference]: Finished difference Result 5771 states and 9248 transitions. [2020-12-22 09:52:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:37,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:52:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:37,952 INFO L225 Difference]: With dead ends: 5771 [2020-12-22 09:52:37,953 INFO L226 Difference]: Without dead ends: 5018 [2020-12-22 09:52:37,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 09:52:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5018 states. [2020-12-22 09:52:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5018 to 5018. [2020-12-22 09:52:38,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:52:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7354 transitions. [2020-12-22 09:52:38,220 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7354 transitions. Word has length 67 [2020-12-22 09:52:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:38,220 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7354 transitions. [2020-12-22 09:52:38,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7354 transitions. [2020-12-22 09:52:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:38,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:38,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:38,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:52:38,225 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:52:38,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:38,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403372400] [2020-12-22 09:52:38,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:52:38,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403372400] [2020-12-22 09:52:38,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:38,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:38,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434974016] [2020-12-22 09:52:38,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:38,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:38,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:38,362 INFO L87 Difference]: Start difference. First operand 5018 states and 7354 transitions. Second operand 7 states. [2020-12-22 09:52:39,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:39,421 INFO L93 Difference]: Finished difference Result 23094 states and 32784 transitions. [2020-12-22 09:52:39,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:39,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:39,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:39,464 INFO L225 Difference]: With dead ends: 23094 [2020-12-22 09:52:39,465 INFO L226 Difference]: Without dead ends: 19620 [2020-12-22 09:52:39,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2020-12-22 09:52:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2020-12-22 09:52:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8490 states. [2020-12-22 09:52:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12202 transitions. [2020-12-22 09:52:39,970 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12202 transitions. Word has length 95 [2020-12-22 09:52:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:39,971 INFO L481 AbstractCegarLoop]: Abstraction has 8490 states and 12202 transitions. [2020-12-22 09:52:39,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12202 transitions. [2020-12-22 09:52:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:39,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:39,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:39,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:52:39,976 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:39,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:52:39,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:39,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872375605] [2020-12-22 09:52:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:52:40,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872375605] [2020-12-22 09:52:40,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:40,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823147379] [2020-12-22 09:52:40,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:40,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:40,120 INFO L87 Difference]: Start difference. First operand 8490 states and 12202 transitions. Second operand 7 states. [2020-12-22 09:52:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:41,286 INFO L93 Difference]: Finished difference Result 26566 states and 37632 transitions. [2020-12-22 09:52:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:41,287 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:41,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:41,338 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 09:52:41,338 INFO L226 Difference]: Without dead ends: 23092 [2020-12-22 09:52:41,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2020-12-22 09:52:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2020-12-22 09:52:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13706 states. [2020-12-22 09:52:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 19434 transitions. [2020-12-22 09:52:42,129 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 19434 transitions. Word has length 95 [2020-12-22 09:52:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:42,130 INFO L481 AbstractCegarLoop]: Abstraction has 13706 states and 19434 transitions. [2020-12-22 09:52:42,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:42,130 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 19434 transitions. [2020-12-22 09:52:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:42,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:42,135 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:42,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:52:42,135 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:42,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:52:42,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:42,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076815454] [2020-12-22 09:52:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:52:42,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076815454] [2020-12-22 09:52:42,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:42,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:42,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913074385] [2020-12-22 09:52:42,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:42,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:42,266 INFO L87 Difference]: Start difference. First operand 13706 states and 19434 transitions. Second operand 7 states. [2020-12-22 09:52:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:43,682 INFO L93 Difference]: Finished difference Result 30038 states and 42480 transitions. [2020-12-22 09:52:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:43,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:43,730 INFO L225 Difference]: With dead ends: 30038 [2020-12-22 09:52:43,730 INFO L226 Difference]: Without dead ends: 26564 [2020-12-22 09:52:43,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2020-12-22 09:52:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2020-12-22 09:52:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17178 states. [2020-12-22 09:52:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 24282 transitions. [2020-12-22 09:52:45,107 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 24282 transitions. Word has length 95 [2020-12-22 09:52:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:45,107 INFO L481 AbstractCegarLoop]: Abstraction has 17178 states and 24282 transitions. [2020-12-22 09:52:45,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 24282 transitions. [2020-12-22 09:52:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:45,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:45,113 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:45,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:52:45,114 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:52:45,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:45,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073518009] [2020-12-22 09:52:45,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:52:45,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073518009] [2020-12-22 09:52:45,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:45,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:45,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396894043] [2020-12-22 09:52:45,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:45,236 INFO L87 Difference]: Start difference. First operand 17178 states and 24282 transitions. Second operand 7 states. [2020-12-22 09:52:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:46,857 INFO L93 Difference]: Finished difference Result 33510 states and 47328 transitions. [2020-12-22 09:52:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:46,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:46,898 INFO L225 Difference]: With dead ends: 33510 [2020-12-22 09:52:46,898 INFO L226 Difference]: Without dead ends: 30036 [2020-12-22 09:52:46,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:46,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-12-22 09:52:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2020-12-22 09:52:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 09:52:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29130 transitions. [2020-12-22 09:52:48,300 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29130 transitions. Word has length 95 [2020-12-22 09:52:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:48,300 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 29130 transitions. [2020-12-22 09:52:48,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29130 transitions. [2020-12-22 09:52:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:48,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:48,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:48,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:52:48,307 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:52:48,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:48,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834387578] [2020-12-22 09:52:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:52:48,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834387578] [2020-12-22 09:52:48,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:48,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:48,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232435354] [2020-12-22 09:52:48,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:48,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:48,440 INFO L87 Difference]: Start difference. First operand 20650 states and 29130 transitions. Second operand 7 states. [2020-12-22 09:52:50,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:50,290 INFO L93 Difference]: Finished difference Result 34902 states and 49296 transitions. [2020-12-22 09:52:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:50,291 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:50,324 INFO L225 Difference]: With dead ends: 34902 [2020-12-22 09:52:50,324 INFO L226 Difference]: Without dead ends: 32468 [2020-12-22 09:52:50,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32468 states. [2020-12-22 09:52:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32468 to 23082. [2020-12-22 09:52:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23082 states. [2020-12-22 09:52:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23082 states to 23082 states and 32554 transitions. [2020-12-22 09:52:51,959 INFO L78 Accepts]: Start accepts. Automaton has 23082 states and 32554 transitions. Word has length 95 [2020-12-22 09:52:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:51,960 INFO L481 AbstractCegarLoop]: Abstraction has 23082 states and 32554 transitions. [2020-12-22 09:52:51,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 23082 states and 32554 transitions. [2020-12-22 09:52:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:52:51,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:51,966 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:51,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:52:51,966 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:51,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:52:51,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:51,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425417805] [2020-12-22 09:52:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:52,287 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-12-22 09:52:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:52,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425417805] [2020-12-22 09:52:52,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732381278] [2020-12-22 09:52:52,431 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 09:52:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:52,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:52:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:52:53,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:53,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:52:53,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098261255] [2020-12-22 09:52:53,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:52:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:52:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:52:53,369 INFO L87 Difference]: Start difference. First operand 23082 states and 32554 transitions. Second operand 21 states. [2020-12-22 09:53:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:10,068 INFO L93 Difference]: Finished difference Result 139883 states and 194035 transitions. [2020-12-22 09:53:10,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:53:10,069 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:53:10,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:10,301 INFO L225 Difference]: With dead ends: 139883 [2020-12-22 09:53:10,301 INFO L226 Difference]: Without dead ends: 118345 [2020-12-22 09:53:10,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:53:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118345 states. [2020-12-22 09:53:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118345 to 73762. [2020-12-22 09:53:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73762 states. [2020-12-22 09:53:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73762 states to 73762 states and 101962 transitions. [2020-12-22 09:53:16,834 INFO L78 Accepts]: Start accepts. Automaton has 73762 states and 101962 transitions. Word has length 96 [2020-12-22 09:53:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:16,834 INFO L481 AbstractCegarLoop]: Abstraction has 73762 states and 101962 transitions. [2020-12-22 09:53:16,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:53:16,834 INFO L276 IsEmpty]: Start isEmpty. Operand 73762 states and 101962 transitions. [2020-12-22 09:53:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:16,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:16,846 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:17,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:17,061 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:17,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:53:17,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:17,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500492681] [2020-12-22 09:53:17,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:17,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500492681] [2020-12-22 09:53:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704477306] [2020-12-22 09:53:17,578 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 09:53:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:17,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:17,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:18,099 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:18,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:18,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:53:18,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30503987] [2020-12-22 09:53:18,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:53:18,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:53:18,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:53:18,570 INFO L87 Difference]: Start difference. First operand 73762 states and 101962 transitions. Second operand 17 states. [2020-12-22 09:53:19,736 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:23,719 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:53:23,915 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:24,182 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:24,494 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:53:24,812 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:25,061 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-22 09:53:25,350 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:25,730 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:53:26,178 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:26,538 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:26,934 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:53:27,808 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:28,222 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:29,012 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2020-12-22 09:53:29,555 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:34,906 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 09:54:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:40,975 INFO L93 Difference]: Finished difference Result 859416 states and 1173557 transitions. [2020-12-22 09:54:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:54:40,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:54:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:42,682 INFO L225 Difference]: With dead ends: 859416 [2020-12-22 09:54:42,682 INFO L226 Difference]: Without dead ends: 787198 [2020-12-22 09:54:43,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:54:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787198 states. [2020-12-22 09:55:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787198 to 336518. [2020-12-22 09:55:17,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336518 states. [2020-12-22 09:55:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336518 states to 336518 states and 459026 transitions. [2020-12-22 09:55:18,922 INFO L78 Accepts]: Start accepts. Automaton has 336518 states and 459026 transitions. Word has length 97 [2020-12-22 09:55:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:18,922 INFO L481 AbstractCegarLoop]: Abstraction has 336518 states and 459026 transitions. [2020-12-22 09:55:18,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:55:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 336518 states and 459026 transitions. [2020-12-22 09:55:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:55:18,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:18,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:19,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:55:19,153 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:19,155 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:55:19,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:19,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315111796] [2020-12-22 09:55:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:19,241 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 09:55:19,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315111796] [2020-12-22 09:55:19,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:19,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669674475] [2020-12-22 09:55:19,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:19,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:19,244 INFO L87 Difference]: Start difference. First operand 336518 states and 459026 transitions. Second operand 3 states.