/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:49:50,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:49:50,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:49:50,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:49:50,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:49:50,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:49:50,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:49:50,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:49:50,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:49:50,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:49:50,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:49:50,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:49:50,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:49:50,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:49:50,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:49:50,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:49:50,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:49:50,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:49:50,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:49:50,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:49:50,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:49:50,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:49:50,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:49:50,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:49:50,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:49:50,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:49:50,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:49:50,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:49:50,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:49:50,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:49:50,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:49:50,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:49:50,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:49:50,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:49:50,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:49:50,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:49:50,294 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:49:50,346 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:49:50,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:49:50,350 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:49:50,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:49:50,350 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:49:50,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:49:50,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:49:50,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:49:50,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:49:50,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:49:50,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:49:50,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:49:50,353 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:49:50,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:49:50,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:49:50,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:49:50,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:49:50,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:49:50,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:49:50,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:49:50,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:49:50,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:49:50,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:49:50,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:49:50,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:49:50,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:49:50,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:49:50,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:49:50,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:49:50,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:49:50,872 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:49:50,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:49:50,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274a52275/641bac34315e4563b0ba2477ed2c8227/FLAG0cb3e2b9c [2020-12-22 09:49:51,938 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:49:51,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:49:51,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274a52275/641bac34315e4563b0ba2477ed2c8227/FLAG0cb3e2b9c [2020-12-22 09:49:52,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/274a52275/641bac34315e4563b0ba2477ed2c8227 [2020-12-22 09:49:52,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:49:52,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:49:52,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:49:52,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:49:52,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:49:52,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:49:52" (1/1) ... [2020-12-22 09:49:52,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74866705 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:52, skipping insertion in model container [2020-12-22 09:49:52,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:49:52" (1/1) ... [2020-12-22 09:49:52,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:49:52,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:49:52,934 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[8858,8871] [2020-12-22 09:49:53,038 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[15551,15564] [2020-12-22 09:49:54,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:49:54,132 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:49:54,215 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[8858,8871] [2020-12-22 09:49:54,239 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[15551,15564] [2020-12-22 09:49:55,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:49:55,076 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:49:55,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55 WrapperNode [2020-12-22 09:49:55,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:49:55,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:49:55,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:49:55,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:49:55,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:49:55,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:49:55,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:49:55,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:49:55,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:55,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:56,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (1/1) ... [2020-12-22 09:49:56,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:49:56,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:49:56,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:49:56,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:49:56,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (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 09:49:56,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:49:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:49:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:49:56,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:50:01,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:50:01,394 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:50:01,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:50:01 BoogieIcfgContainer [2020-12-22 09:50:01,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:50:01,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:50:01,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:50:01,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:50:01,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:49:52" (1/3) ... [2020-12-22 09:50:01,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8cef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:50:01, skipping insertion in model container [2020-12-22 09:50:01,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:49:55" (2/3) ... [2020-12-22 09:50:01,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8cef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:50:01, skipping insertion in model container [2020-12-22 09:50:01,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:50:01" (3/3) ... [2020-12-22 09:50:01,414 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2020-12-22 09:50:01,422 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:50:01,429 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:50:01,454 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:50:01,513 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:50:01,518 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:50:01,518 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:50:01,519 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:50:01,519 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:50:01,519 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:50:01,519 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:50:01,519 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:50:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states. [2020-12-22 09:50:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:50:01,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:01,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:01,581 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:01,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2020-12-22 09:50:01,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:01,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140995922] [2020-12-22 09:50:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:01,858 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 09:50:01,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140995922] [2020-12-22 09:50:01,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:01,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:50:01,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461239753] [2020-12-22 09:50:01,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:50:01,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:50:01,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:50:01,896 INFO L87 Difference]: Start difference. First operand 892 states. Second operand 2 states. [2020-12-22 09:50:02,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:02,010 INFO L93 Difference]: Finished difference Result 1753 states and 3328 transitions. [2020-12-22 09:50:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:50:02,012 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-22 09:50:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:02,052 INFO L225 Difference]: With dead ends: 1753 [2020-12-22 09:50:02,052 INFO L226 Difference]: Without dead ends: 826 [2020-12-22 09:50:02,060 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 09:50:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-12-22 09:50:02,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2020-12-22 09:50:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-12-22 09:50:02,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1559 transitions. [2020-12-22 09:50:02,183 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1559 transitions. Word has length 30 [2020-12-22 09:50:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:02,183 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1559 transitions. [2020-12-22 09:50:02,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:50:02,184 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1559 transitions. [2020-12-22 09:50:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:50:02,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:02,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:02,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:50:02,187 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:02,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2020-12-22 09:50:02,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:02,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576625510] [2020-12-22 09:50:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:02,320 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 09:50:02,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576625510] [2020-12-22 09:50:02,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:02,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:02,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507782645] [2020-12-22 09:50:02,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:50:02,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:50:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:50:02,325 INFO L87 Difference]: Start difference. First operand 826 states and 1559 transitions. Second operand 5 states. [2020-12-22 09:50:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:02,448 INFO L93 Difference]: Finished difference Result 873 states and 1631 transitions. [2020-12-22 09:50:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:50:02,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:50:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:02,456 INFO L225 Difference]: With dead ends: 873 [2020-12-22 09:50:02,456 INFO L226 Difference]: Without dead ends: 826 [2020-12-22 09:50:02,457 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 09:50:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-12-22 09:50:02,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2020-12-22 09:50:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-12-22 09:50:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1536 transitions. [2020-12-22 09:50:02,497 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1536 transitions. Word has length 30 [2020-12-22 09:50:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:02,498 INFO L481 AbstractCegarLoop]: Abstraction has 826 states and 1536 transitions. [2020-12-22 09:50:02,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:50:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1536 transitions. [2020-12-22 09:50:02,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:02,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:02,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:02,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:50:02,505 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:02,509 INFO L82 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2020-12-22 09:50:02,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:02,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928774521] [2020-12-22 09:50:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:02,728 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 09:50:02,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928774521] [2020-12-22 09:50:02,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:02,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:02,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523160331] [2020-12-22 09:50:02,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:02,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:02,731 INFO L87 Difference]: Start difference. First operand 826 states and 1536 transitions. Second operand 3 states. [2020-12-22 09:50:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:02,772 INFO L93 Difference]: Finished difference Result 906 states and 1662 transitions. [2020-12-22 09:50:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:02,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:50:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:02,779 INFO L225 Difference]: With dead ends: 906 [2020-12-22 09:50:02,780 INFO L226 Difference]: Without dead ends: 863 [2020-12-22 09:50:02,781 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 09:50:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2020-12-22 09:50:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 861. [2020-12-22 09:50:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 861 states. [2020-12-22 09:50:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1592 transitions. [2020-12-22 09:50:02,810 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1592 transitions. Word has length 52 [2020-12-22 09:50:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:02,810 INFO L481 AbstractCegarLoop]: Abstraction has 861 states and 1592 transitions. [2020-12-22 09:50:02,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1592 transitions. [2020-12-22 09:50:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:02,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:02,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:02,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:50:02,813 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:02,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2020-12-22 09:50:02,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:02,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975261505] [2020-12-22 09:50:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:02,895 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 09:50:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975261505] [2020-12-22 09:50:02,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:02,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:02,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631334900] [2020-12-22 09:50:02,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:02,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:02,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:02,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:02,899 INFO L87 Difference]: Start difference. First operand 861 states and 1592 transitions. Second operand 3 states. [2020-12-22 09:50:02,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:02,943 INFO L93 Difference]: Finished difference Result 1005 states and 1820 transitions. [2020-12-22 09:50:02,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:02,944 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:50:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:02,950 INFO L225 Difference]: With dead ends: 1005 [2020-12-22 09:50:02,950 INFO L226 Difference]: Without dead ends: 927 [2020-12-22 09:50:02,952 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 09:50:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2020-12-22 09:50:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 925. [2020-12-22 09:50:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 925 states. [2020-12-22 09:50:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1693 transitions. [2020-12-22 09:50:02,985 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1693 transitions. Word has length 52 [2020-12-22 09:50:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:02,985 INFO L481 AbstractCegarLoop]: Abstraction has 925 states and 1693 transitions. [2020-12-22 09:50:02,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1693 transitions. [2020-12-22 09:50:02,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:02,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:02,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:02,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:50:02,988 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2020-12-22 09:50:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:02,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297356544] [2020-12-22 09:50:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:03,069 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 09:50:03,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297356544] [2020-12-22 09:50:03,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:03,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:03,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492154159] [2020-12-22 09:50:03,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:03,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:03,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:03,072 INFO L87 Difference]: Start difference. First operand 925 states and 1693 transitions. Second operand 3 states. [2020-12-22 09:50:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:03,126 INFO L93 Difference]: Finished difference Result 1185 states and 2103 transitions. [2020-12-22 09:50:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:03,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:50:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:03,134 INFO L225 Difference]: With dead ends: 1185 [2020-12-22 09:50:03,134 INFO L226 Difference]: Without dead ends: 1043 [2020-12-22 09:50:03,136 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 09:50:03,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2020-12-22 09:50:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1041. [2020-12-22 09:50:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1041 states. [2020-12-22 09:50:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1873 transitions. [2020-12-22 09:50:03,242 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1873 transitions. Word has length 52 [2020-12-22 09:50:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:03,243 INFO L481 AbstractCegarLoop]: Abstraction has 1041 states and 1873 transitions. [2020-12-22 09:50:03,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1873 transitions. [2020-12-22 09:50:03,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:03,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:03,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:03,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:50:03,245 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:03,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:03,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2020-12-22 09:50:03,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:03,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036992872] [2020-12-22 09:50:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:03,318 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 09:50:03,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036992872] [2020-12-22 09:50:03,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:03,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:03,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000814171] [2020-12-22 09:50:03,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:03,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:03,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:03,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:03,324 INFO L87 Difference]: Start difference. First operand 1041 states and 1873 transitions. Second operand 3 states. [2020-12-22 09:50:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:03,384 INFO L93 Difference]: Finished difference Result 1509 states and 2603 transitions. [2020-12-22 09:50:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:03,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 09:50:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:03,394 INFO L225 Difference]: With dead ends: 1509 [2020-12-22 09:50:03,394 INFO L226 Difference]: Without dead ends: 1251 [2020-12-22 09:50:03,395 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 09:50:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2020-12-22 09:50:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1249. [2020-12-22 09:50:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1249 states. [2020-12-22 09:50:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2189 transitions. [2020-12-22 09:50:03,448 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2189 transitions. Word has length 52 [2020-12-22 09:50:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:03,450 INFO L481 AbstractCegarLoop]: Abstraction has 1249 states and 2189 transitions. [2020-12-22 09:50:03,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2189 transitions. [2020-12-22 09:50:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:50:03,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:03,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:03,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:50:03,452 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:03,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2020-12-22 09:50:03,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:03,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433089759] [2020-12-22 09:50:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:03,613 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 09:50:03,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433089759] [2020-12-22 09:50:03,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:03,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:03,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661952327] [2020-12-22 09:50:03,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:03,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:03,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:03,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:03,617 INFO L87 Difference]: Start difference. First operand 1249 states and 2189 transitions. Second operand 6 states. [2020-12-22 09:50:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:03,933 INFO L93 Difference]: Finished difference Result 4977 states and 7957 transitions. [2020-12-22 09:50:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:50:03,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:50:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:03,962 INFO L225 Difference]: With dead ends: 4977 [2020-12-22 09:50:03,962 INFO L226 Difference]: Without dead ends: 4511 [2020-12-22 09:50:03,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:50:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2020-12-22 09:50:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 1713. [2020-12-22 09:50:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1713 states. [2020-12-22 09:50:04,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2877 transitions. [2020-12-22 09:50:04,090 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2877 transitions. Word has length 52 [2020-12-22 09:50:04,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:04,090 INFO L481 AbstractCegarLoop]: Abstraction has 1713 states and 2877 transitions. [2020-12-22 09:50:04,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2877 transitions. [2020-12-22 09:50:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:50:04,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:04,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:04,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:50:04,093 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:04,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2020-12-22 09:50:04,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:04,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379090148] [2020-12-22 09:50:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:04,198 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 09:50:04,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379090148] [2020-12-22 09:50:04,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:04,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:04,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280880605] [2020-12-22 09:50:04,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:04,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:04,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:04,202 INFO L87 Difference]: Start difference. First operand 1713 states and 2877 transitions. Second operand 3 states. [2020-12-22 09:50:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:04,308 INFO L93 Difference]: Finished difference Result 3071 states and 4929 transitions. [2020-12-22 09:50:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:04,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:50:04,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:04,324 INFO L225 Difference]: With dead ends: 3071 [2020-12-22 09:50:04,324 INFO L226 Difference]: Without dead ends: 2141 [2020-12-22 09:50:04,327 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 09:50:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2020-12-22 09:50:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2139. [2020-12-22 09:50:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-12-22 09:50:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3495 transitions. [2020-12-22 09:50:04,436 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3495 transitions. Word has length 54 [2020-12-22 09:50:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:04,438 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3495 transitions. [2020-12-22 09:50:04,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3495 transitions. [2020-12-22 09:50:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:50:04,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:04,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:04,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:50:04,440 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:04,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2020-12-22 09:50:04,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:04,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623667328] [2020-12-22 09:50:04,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:04,664 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 09:50:04,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623667328] [2020-12-22 09:50:04,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:04,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:04,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627176298] [2020-12-22 09:50:04,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:04,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:04,667 INFO L87 Difference]: Start difference. First operand 2139 states and 3495 transitions. Second operand 6 states. [2020-12-22 09:50:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:04,884 INFO L93 Difference]: Finished difference Result 3495 states and 5521 transitions. [2020-12-22 09:50:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:04,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:50:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:04,897 INFO L225 Difference]: With dead ends: 3495 [2020-12-22 09:50:04,897 INFO L226 Difference]: Without dead ends: 2141 [2020-12-22 09:50:04,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:50:04,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2020-12-22 09:50:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2139. [2020-12-22 09:50:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-12-22 09:50:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3471 transitions. [2020-12-22 09:50:05,009 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3471 transitions. Word has length 54 [2020-12-22 09:50:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:05,009 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3471 transitions. [2020-12-22 09:50:05,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3471 transitions. [2020-12-22 09:50:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:50:05,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:05,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:05,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:50:05,011 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2020-12-22 09:50:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:05,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60026254] [2020-12-22 09:50:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:05,124 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 09:50:05,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60026254] [2020-12-22 09:50:05,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:05,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:05,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819944137] [2020-12-22 09:50:05,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:05,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:05,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:05,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:05,132 INFO L87 Difference]: Start difference. First operand 2139 states and 3471 transitions. Second operand 6 states. [2020-12-22 09:50:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:05,434 INFO L93 Difference]: Finished difference Result 3493 states and 5472 transitions. [2020-12-22 09:50:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:05,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:50:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:05,449 INFO L225 Difference]: With dead ends: 3493 [2020-12-22 09:50:05,449 INFO L226 Difference]: Without dead ends: 2139 [2020-12-22 09:50:05,452 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 09:50:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2020-12-22 09:50:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2139. [2020-12-22 09:50:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-12-22 09:50:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3447 transitions. [2020-12-22 09:50:05,587 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3447 transitions. Word has length 55 [2020-12-22 09:50:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:05,588 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3447 transitions. [2020-12-22 09:50:05,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3447 transitions. [2020-12-22 09:50:05,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:50:05,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:05,589 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] [2020-12-22 09:50:05,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:50:05,590 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:05,590 INFO L82 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2020-12-22 09:50:05,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:05,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015460294] [2020-12-22 09:50:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:05,685 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 09:50:05,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015460294] [2020-12-22 09:50:05,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:05,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:05,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175764447] [2020-12-22 09:50:05,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:05,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:05,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:05,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:05,690 INFO L87 Difference]: Start difference. First operand 2139 states and 3447 transitions. Second operand 6 states. [2020-12-22 09:50:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:05,932 INFO L93 Difference]: Finished difference Result 3493 states and 5424 transitions. [2020-12-22 09:50:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:05,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-22 09:50:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:05,944 INFO L225 Difference]: With dead ends: 3493 [2020-12-22 09:50:05,945 INFO L226 Difference]: Without dead ends: 2139 [2020-12-22 09:50:05,948 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 09:50:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2020-12-22 09:50:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2139. [2020-12-22 09:50:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2139 states. [2020-12-22 09:50:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 3423 transitions. [2020-12-22 09:50:06,100 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 3423 transitions. Word has length 55 [2020-12-22 09:50:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:06,100 INFO L481 AbstractCegarLoop]: Abstraction has 2139 states and 3423 transitions. [2020-12-22 09:50:06,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:06,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 3423 transitions. [2020-12-22 09:50:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:50:06,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:06,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:06,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:50:06,102 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2020-12-22 09:50:06,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:06,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259156822] [2020-12-22 09:50:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:06,196 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 09:50:06,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259156822] [2020-12-22 09:50:06,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:06,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:50:06,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044496913] [2020-12-22 09:50:06,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:50:06,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:50:06,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:50:06,203 INFO L87 Difference]: Start difference. First operand 2139 states and 3423 transitions. Second operand 5 states. [2020-12-22 09:50:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:06,506 INFO L93 Difference]: Finished difference Result 3338 states and 5089 transitions. [2020-12-22 09:50:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:50:06,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:50:06,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:06,525 INFO L225 Difference]: With dead ends: 3338 [2020-12-22 09:50:06,525 INFO L226 Difference]: Without dead ends: 3336 [2020-12-22 09:50:06,528 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 09:50:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2020-12-22 09:50:06,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2235. [2020-12-22 09:50:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2235 states. [2020-12-22 09:50:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 3511 transitions. [2020-12-22 09:50:06,709 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 3511 transitions. Word has length 55 [2020-12-22 09:50:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:06,710 INFO L481 AbstractCegarLoop]: Abstraction has 2235 states and 3511 transitions. [2020-12-22 09:50:06,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:50:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 3511 transitions. [2020-12-22 09:50:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 09:50:06,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:06,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:06,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:50:06,718 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash 736675621, now seen corresponding path program 1 times [2020-12-22 09:50:06,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:06,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76854848] [2020-12-22 09:50:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:06,827 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 09:50:06,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76854848] [2020-12-22 09:50:06,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:06,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:06,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545721224] [2020-12-22 09:50:06,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:50:06,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:06,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:50:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:50:06,830 INFO L87 Difference]: Start difference. First operand 2235 states and 3511 transitions. Second operand 4 states. [2020-12-22 09:50:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:17,477 INFO L93 Difference]: Finished difference Result 4490 states and 7820 transitions. [2020-12-22 09:50:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:50:17,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-12-22 09:50:17,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:17,505 INFO L225 Difference]: With dead ends: 4490 [2020-12-22 09:50:17,506 INFO L226 Difference]: Without dead ends: 3737 [2020-12-22 09:50:17,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:50:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2020-12-22 09:50:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3737. [2020-12-22 09:50:17,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3737 states. [2020-12-22 09:50:17,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 5637 transitions. [2020-12-22 09:50:17,722 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 5637 transitions. Word has length 60 [2020-12-22 09:50:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:17,722 INFO L481 AbstractCegarLoop]: Abstraction has 3737 states and 5637 transitions. [2020-12-22 09:50:17,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:50:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 5637 transitions. [2020-12-22 09:50:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:50:17,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:17,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:17,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:50:17,727 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:17,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1830558034, now seen corresponding path program 1 times [2020-12-22 09:50:17,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:17,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699873214] [2020-12-22 09:50:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:50:17,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699873214] [2020-12-22 09:50:17,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:17,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:17,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785241210] [2020-12-22 09:50:17,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:17,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:17,956 INFO L87 Difference]: Start difference. First operand 3737 states and 5637 transitions. Second operand 6 states. [2020-12-22 09:50:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:18,577 INFO L93 Difference]: Finished difference Result 9843 states and 14206 transitions. [2020-12-22 09:50:18,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:18,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:50:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:18,619 INFO L225 Difference]: With dead ends: 9843 [2020-12-22 09:50:18,619 INFO L226 Difference]: Without dead ends: 8393 [2020-12-22 09:50:18,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2020-12-22 09:50:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 5185. [2020-12-22 09:50:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5185 states. [2020-12-22 09:50:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 7653 transitions. [2020-12-22 09:50:18,964 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 7653 transitions. Word has length 78 [2020-12-22 09:50:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:18,964 INFO L481 AbstractCegarLoop]: Abstraction has 5185 states and 7653 transitions. [2020-12-22 09:50:18,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 7653 transitions. [2020-12-22 09:50:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:50:18,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:18,967 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:18,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:50:18,968 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 61775218, now seen corresponding path program 1 times [2020-12-22 09:50:18,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:18,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126224370] [2020-12-22 09:50:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:50:19,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126224370] [2020-12-22 09:50:19,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:19,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:19,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781128470] [2020-12-22 09:50:19,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:19,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:19,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:19,071 INFO L87 Difference]: Start difference. First operand 5185 states and 7653 transitions. Second operand 6 states. [2020-12-22 09:50:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:19,962 INFO L93 Difference]: Finished difference Result 11291 states and 16222 transitions. [2020-12-22 09:50:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:19,963 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:50:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:19,992 INFO L225 Difference]: With dead ends: 11291 [2020-12-22 09:50:19,994 INFO L226 Difference]: Without dead ends: 9841 [2020-12-22 09:50:20,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9841 states. [2020-12-22 09:50:20,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9841 to 7361. [2020-12-22 09:50:20,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7361 states. [2020-12-22 09:50:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 10657 transitions. [2020-12-22 09:50:20,640 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 10657 transitions. Word has length 78 [2020-12-22 09:50:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:20,640 INFO L481 AbstractCegarLoop]: Abstraction has 7361 states and 10657 transitions. [2020-12-22 09:50:20,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 10657 transitions. [2020-12-22 09:50:20,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:50:20,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:20,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:20,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:50:20,645 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1193415058, now seen corresponding path program 1 times [2020-12-22 09:50:20,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:20,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806873450] [2020-12-22 09:50:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:50:20,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806873450] [2020-12-22 09:50:20,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:20,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:20,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258448069] [2020-12-22 09:50:20,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:20,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:20,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:20,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:20,736 INFO L87 Difference]: Start difference. First operand 7361 states and 10657 transitions. Second operand 6 states. [2020-12-22 09:50:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:21,513 INFO L93 Difference]: Finished difference Result 12739 states and 18238 transitions. [2020-12-22 09:50:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:21,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:50:21,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:21,537 INFO L225 Difference]: With dead ends: 12739 [2020-12-22 09:50:21,537 INFO L226 Difference]: Without dead ends: 11289 [2020-12-22 09:50:21,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11289 states. [2020-12-22 09:50:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11289 to 8809. [2020-12-22 09:50:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8809 states. [2020-12-22 09:50:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8809 states to 8809 states and 12673 transitions. [2020-12-22 09:50:22,084 INFO L78 Accepts]: Start accepts. Automaton has 8809 states and 12673 transitions. Word has length 78 [2020-12-22 09:50:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:22,084 INFO L481 AbstractCegarLoop]: Abstraction has 8809 states and 12673 transitions. [2020-12-22 09:50:22,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 8809 states and 12673 transitions. [2020-12-22 09:50:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:50:22,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:22,088 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:22,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:50:22,088 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash -42043982, now seen corresponding path program 1 times [2020-12-22 09:50:22,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:22,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146093192] [2020-12-22 09:50:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:50:22,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146093192] [2020-12-22 09:50:22,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:22,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:50:22,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216156850] [2020-12-22 09:50:22,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:50:22,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:22,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:50:22,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:50:22,169 INFO L87 Difference]: Start difference. First operand 8809 states and 12673 transitions. Second operand 6 states. [2020-12-22 09:50:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:22,901 INFO L93 Difference]: Finished difference Result 13339 states and 19086 transitions. [2020-12-22 09:50:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:50:22,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:50:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:22,926 INFO L225 Difference]: With dead ends: 13339 [2020-12-22 09:50:22,927 INFO L226 Difference]: Without dead ends: 12313 [2020-12-22 09:50:22,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:50:22,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12313 states. [2020-12-22 09:50:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12313 to 9833. [2020-12-22 09:50:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9833 states. [2020-12-22 09:50:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9833 states to 9833 states and 14113 transitions. [2020-12-22 09:50:23,506 INFO L78 Accepts]: Start accepts. Automaton has 9833 states and 14113 transitions. Word has length 78 [2020-12-22 09:50:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:23,507 INFO L481 AbstractCegarLoop]: Abstraction has 9833 states and 14113 transitions. [2020-12-22 09:50:23,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:50:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 9833 states and 14113 transitions. [2020-12-22 09:50:23,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 09:50:23,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:23,510 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] [2020-12-22 09:50:23,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:50:23,511 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:23,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1839803446, now seen corresponding path program 1 times [2020-12-22 09:50:23,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:23,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072128352] [2020-12-22 09:50:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:23,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072128352] [2020-12-22 09:50:23,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884230148] [2020-12-22 09:50:23,725 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 09:50:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:23,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:50:23,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:50:24,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:24,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:50:24,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573417413] [2020-12-22 09:50:24,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:50:24,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:24,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:50:24,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:50:24,305 INFO L87 Difference]: Start difference. First operand 9833 states and 14113 transitions. Second operand 12 states. [2020-12-22 09:50:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:30,078 INFO L93 Difference]: Finished difference Result 39339 states and 54916 transitions. [2020-12-22 09:50:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 09:50:30,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-12-22 09:50:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:30,158 INFO L225 Difference]: With dead ends: 39339 [2020-12-22 09:50:30,158 INFO L226 Difference]: Without dead ends: 33705 [2020-12-22 09:50:30,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:50:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33705 states. [2020-12-22 09:50:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33705 to 26657. [2020-12-22 09:50:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26657 states. [2020-12-22 09:50:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26657 states to 26657 states and 37149 transitions. [2020-12-22 09:50:32,763 INFO L78 Accepts]: Start accepts. Automaton has 26657 states and 37149 transitions. Word has length 79 [2020-12-22 09:50:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:32,763 INFO L481 AbstractCegarLoop]: Abstraction has 26657 states and 37149 transitions. [2020-12-22 09:50:32,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:50:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 26657 states and 37149 transitions. [2020-12-22 09:50:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:50:32,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:32,767 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] [2020-12-22 09:50:32,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:50:32,976 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:32,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1196201514, now seen corresponding path program 1 times [2020-12-22 09:50:32,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:32,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171475449] [2020-12-22 09:50:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:33,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171475449] [2020-12-22 09:50:33,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153961506] [2020-12-22 09:50:33,220 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 09:50:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:33,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:50:33,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:33,558 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:50:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:33,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:34,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:50:34,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046958239] [2020-12-22 09:50:34,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:50:34,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:50:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:50:34,003 INFO L87 Difference]: Start difference. First operand 26657 states and 37149 transitions. Second operand 17 states. [2020-12-22 09:50:37,662 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:50:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:48,047 INFO L93 Difference]: Finished difference Result 154347 states and 210428 transitions. [2020-12-22 09:50:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:50:48,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 09:50:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:48,422 INFO L225 Difference]: With dead ends: 154347 [2020-12-22 09:50:48,422 INFO L226 Difference]: Without dead ends: 129977 [2020-12-22 09:50:48,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:50:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129977 states. [2020-12-22 09:50:55,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129977 to 56425. [2020-12-22 09:50:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56425 states. [2020-12-22 09:50:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56425 states to 56425 states and 77657 transitions. [2020-12-22 09:50:55,500 INFO L78 Accepts]: Start accepts. Automaton has 56425 states and 77657 transitions. Word has length 80 [2020-12-22 09:50:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:55,500 INFO L481 AbstractCegarLoop]: Abstraction has 56425 states and 77657 transitions. [2020-12-22 09:50:55,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:50:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 56425 states and 77657 transitions. [2020-12-22 09:50:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:50:55,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:55,506 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:55,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:55,710 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:55,712 INFO L82 PathProgramCache]: Analyzing trace with hash 305868284, now seen corresponding path program 1 times [2020-12-22 09:50:55,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:55,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248264838] [2020-12-22 09:50:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:55,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248264838] [2020-12-22 09:50:55,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685339577] [2020-12-22 09:50:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:56,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:50:56,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:56,327 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-12-22 09:50:56,401 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:50:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:56,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:50:56,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230905878] [2020-12-22 09:50:56,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:50:56,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:56,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:50:56,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:50:56,802 INFO L87 Difference]: Start difference. First operand 56425 states and 77657 transitions. Second operand 17 states. [2020-12-22 09:50:56,936 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:51:01,690 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-12-22 09:51:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:29,816 INFO L93 Difference]: Finished difference Result 348731 states and 473121 transitions. [2020-12-22 09:51:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:51:29,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-12-22 09:51:29,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:30,536 INFO L225 Difference]: With dead ends: 348731 [2020-12-22 09:51:30,537 INFO L226 Difference]: Without dead ends: 294593 [2020-12-22 09:51:30,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:51:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294593 states. [2020-12-22 09:51:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294593 to 134581. [2020-12-22 09:51:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134581 states. [2020-12-22 09:51:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134581 states to 134581 states and 183806 transitions. [2020-12-22 09:51:47,977 INFO L78 Accepts]: Start accepts. Automaton has 134581 states and 183806 transitions. Word has length 80 [2020-12-22 09:51:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:47,978 INFO L481 AbstractCegarLoop]: Abstraction has 134581 states and 183806 transitions. [2020-12-22 09:51:47,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:51:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 134581 states and 183806 transitions. [2020-12-22 09:51:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:51:47,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:47,988 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] [2020-12-22 09:51:48,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:48,203 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:48,205 INFO L82 PathProgramCache]: Analyzing trace with hash 643661426, now seen corresponding path program 1 times [2020-12-22 09:51:48,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:48,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243447569] [2020-12-22 09:51:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:48,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243447569] [2020-12-22 09:51:48,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:51:48,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:51:48,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937343636] [2020-12-22 09:51:48,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:51:48,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:51:48,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:51:48,568 INFO L87 Difference]: Start difference. First operand 134581 states and 183806 transitions. Second operand 3 states. [2020-12-22 09:52:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:03,305 INFO L93 Difference]: Finished difference Result 266877 states and 364017 transitions. [2020-12-22 09:52:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:03,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:52:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:03,517 INFO L225 Difference]: With dead ends: 266877 [2020-12-22 09:52:03,518 INFO L226 Difference]: Without dead ends: 134583 [2020-12-22 09:52:03,603 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 09:52:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134583 states. [2020-12-22 09:52:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134583 to 131629. [2020-12-22 09:52:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131629 states. [2020-12-22 09:52:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131629 states to 131629 states and 176922 transitions. [2020-12-22 09:52:17,837 INFO L78 Accepts]: Start accepts. Automaton has 131629 states and 176922 transitions. Word has length 80 [2020-12-22 09:52:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:17,838 INFO L481 AbstractCegarLoop]: Abstraction has 131629 states and 176922 transitions. [2020-12-22 09:52:17,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 131629 states and 176922 transitions. [2020-12-22 09:52:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:52:17,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:17,861 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] [2020-12-22 09:52:17,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:52:17,861 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:17,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash 369973714, now seen corresponding path program 1 times [2020-12-22 09:52:17,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:17,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749533167] [2020-12-22 09:52:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:17,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749533167] [2020-12-22 09:52:17,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:17,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:17,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591338982] [2020-12-22 09:52:17,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:17,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:17,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:17,929 INFO L87 Difference]: Start difference. First operand 131629 states and 176922 transitions. Second operand 3 states. [2020-12-22 09:52:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:25,795 INFO L93 Difference]: Finished difference Result 204129 states and 273477 transitions. [2020-12-22 09:52:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:25,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:52:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:25,922 INFO L225 Difference]: With dead ends: 204129 [2020-12-22 09:52:25,922 INFO L226 Difference]: Without dead ends: 74787 [2020-12-22 09:52:25,978 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 09:52:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74787 states. [2020-12-22 09:52:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74787 to 72553. [2020-12-22 09:52:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72553 states. [2020-12-22 09:52:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72553 states to 72553 states and 95206 transitions. [2020-12-22 09:52:33,541 INFO L78 Accepts]: Start accepts. Automaton has 72553 states and 95206 transitions. Word has length 80 [2020-12-22 09:52:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:33,541 INFO L481 AbstractCegarLoop]: Abstraction has 72553 states and 95206 transitions. [2020-12-22 09:52:33,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 72553 states and 95206 transitions. [2020-12-22 09:52:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:52:33,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:33,545 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] [2020-12-22 09:52:33,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:52:33,545 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:33,546 INFO L82 PathProgramCache]: Analyzing trace with hash 293809458, now seen corresponding path program 1 times [2020-12-22 09:52:33,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:33,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767974202] [2020-12-22 09:52:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:33,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767974202] [2020-12-22 09:52:33,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:33,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:33,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575793213] [2020-12-22 09:52:33,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:33,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:33,594 INFO L87 Difference]: Start difference. First operand 72553 states and 95206 transitions. Second operand 3 states. [2020-12-22 09:52:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:36,764 INFO L93 Difference]: Finished difference Result 99245 states and 129889 transitions. [2020-12-22 09:52:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:36,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:52:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:36,795 INFO L225 Difference]: With dead ends: 99245 [2020-12-22 09:52:36,796 INFO L226 Difference]: Without dead ends: 28979 [2020-12-22 09:52:36,816 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 09:52:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28979 states. [2020-12-22 09:52:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28979 to 27437. [2020-12-22 09:52:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27437 states. [2020-12-22 09:52:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27437 states to 27437 states and 35894 transitions. [2020-12-22 09:52:39,630 INFO L78 Accepts]: Start accepts. Automaton has 27437 states and 35894 transitions. Word has length 80 [2020-12-22 09:52:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:39,631 INFO L481 AbstractCegarLoop]: Abstraction has 27437 states and 35894 transitions. [2020-12-22 09:52:39,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27437 states and 35894 transitions. [2020-12-22 09:52:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:52:39,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:39,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:39,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:52:39,633 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:39,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1743519558, now seen corresponding path program 1 times [2020-12-22 09:52:39,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:39,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996495942] [2020-12-22 09:52:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:52:39,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996495942] [2020-12-22 09:52:39,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:39,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:39,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787078155] [2020-12-22 09:52:39,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:39,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:39,699 INFO L87 Difference]: Start difference. First operand 27437 states and 35894 transitions. Second operand 6 states. [2020-12-22 09:52:41,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:41,910 INFO L93 Difference]: Finished difference Result 46257 states and 60155 transitions. [2020-12-22 09:52:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:41,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:52:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:41,932 INFO L225 Difference]: With dead ends: 46257 [2020-12-22 09:52:41,932 INFO L226 Difference]: Without dead ends: 21226 [2020-12-22 09:52:41,942 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 09:52:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2020-12-22 09:52:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 21226. [2020-12-22 09:52:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21226 states. [2020-12-22 09:52:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21226 states to 21226 states and 27586 transitions. [2020-12-22 09:52:44,159 INFO L78 Accepts]: Start accepts. Automaton has 21226 states and 27586 transitions. Word has length 80 [2020-12-22 09:52:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:44,159 INFO L481 AbstractCegarLoop]: Abstraction has 21226 states and 27586 transitions. [2020-12-22 09:52:44,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 21226 states and 27586 transitions. [2020-12-22 09:52:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:52:44,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:44,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:44,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:52:44,162 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:44,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1113390490, now seen corresponding path program 1 times [2020-12-22 09:52:44,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:44,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023579590] [2020-12-22 09:52:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:52:44,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023579590] [2020-12-22 09:52:44,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:44,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:44,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301884855] [2020-12-22 09:52:44,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:44,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:44,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:44,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:44,245 INFO L87 Difference]: Start difference. First operand 21226 states and 27586 transitions. Second operand 6 states. [2020-12-22 09:52:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:46,154 INFO L93 Difference]: Finished difference Result 35962 states and 46403 transitions. [2020-12-22 09:52:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:46,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:52:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:46,177 INFO L225 Difference]: With dead ends: 35962 [2020-12-22 09:52:46,177 INFO L226 Difference]: Without dead ends: 17062 [2020-12-22 09:52:46,185 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 09:52:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17062 states. [2020-12-22 09:52:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17062 to 17062. [2020-12-22 09:52:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17062 states. [2020-12-22 09:52:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17062 states to 17062 states and 22190 transitions. [2020-12-22 09:52:47,882 INFO L78 Accepts]: Start accepts. Automaton has 17062 states and 22190 transitions. Word has length 80 [2020-12-22 09:52:47,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:47,882 INFO L481 AbstractCegarLoop]: Abstraction has 17062 states and 22190 transitions. [2020-12-22 09:52:47,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:47,882 INFO L276 IsEmpty]: Start isEmpty. Operand 17062 states and 22190 transitions. [2020-12-22 09:52:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:52:47,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:47,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:47,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:52:47,884 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash -68740960, now seen corresponding path program 1 times [2020-12-22 09:52:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:47,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095824270] [2020-12-22 09:52:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:48,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095824270] [2020-12-22 09:52:48,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536330577] [2020-12-22 09:52:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:52:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:48,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:52:48,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:48,353 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:52:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:48,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:48,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:52:48,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72691317] [2020-12-22 09:52:48,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:52:48,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:48,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:52:48,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:52:48,621 INFO L87 Difference]: Start difference. First operand 17062 states and 22190 transitions. Second operand 17 states. [2020-12-22 09:52:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:54,867 INFO L93 Difference]: Finished difference Result 55762 states and 71241 transitions. [2020-12-22 09:52:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 09:52:54,868 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2020-12-22 09:52:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:54,910 INFO L225 Difference]: With dead ends: 55762 [2020-12-22 09:52:54,910 INFO L226 Difference]: Without dead ends: 43089 [2020-12-22 09:52:54,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 09:52:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43089 states. [2020-12-22 09:52:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43089 to 31061. [2020-12-22 09:52:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31061 states. [2020-12-22 09:52:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31061 states to 31061 states and 39820 transitions. [2020-12-22 09:52:58,592 INFO L78 Accepts]: Start accepts. Automaton has 31061 states and 39820 transitions. Word has length 81 [2020-12-22 09:52:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:58,592 INFO L481 AbstractCegarLoop]: Abstraction has 31061 states and 39820 transitions. [2020-12-22 09:52:58,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:52:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 31061 states and 39820 transitions. [2020-12-22 09:52:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:52:58,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:58,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:58,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:52:58,798 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:58,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1149244438, now seen corresponding path program 1 times [2020-12-22 09:52:58,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:58,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480384473] [2020-12-22 09:52:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:58,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480384473] [2020-12-22 09:52:58,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:58,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:58,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354907547] [2020-12-22 09:52:58,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:58,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:58,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:58,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:58,879 INFO L87 Difference]: Start difference. First operand 31061 states and 39820 transitions. Second operand 3 states. [2020-12-22 09:53:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:00,998 INFO L93 Difference]: Finished difference Result 43649 states and 55858 transitions. [2020-12-22 09:53:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:53:00,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:53:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:01,017 INFO L225 Difference]: With dead ends: 43649 [2020-12-22 09:53:01,017 INFO L226 Difference]: Without dead ends: 17613 [2020-12-22 09:53:01,032 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 09:53:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17613 states. [2020-12-22 09:53:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17613 to 17611. [2020-12-22 09:53:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17611 states. [2020-12-22 09:53:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17611 states to 17611 states and 22312 transitions. [2020-12-22 09:53:03,144 INFO L78 Accepts]: Start accepts. Automaton has 17611 states and 22312 transitions. Word has length 81 [2020-12-22 09:53:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:03,144 INFO L481 AbstractCegarLoop]: Abstraction has 17611 states and 22312 transitions. [2020-12-22 09:53:03,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:53:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 17611 states and 22312 transitions. [2020-12-22 09:53:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:53:03,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:03,146 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:03,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 09:53:03,146 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:03,146 INFO L82 PathProgramCache]: Analyzing trace with hash -549108429, now seen corresponding path program 1 times [2020-12-22 09:53:03,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:03,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823803002] [2020-12-22 09:53:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:04,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823803002] [2020-12-22 09:53:04,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448752265] [2020-12-22 09:53:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:04,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:53:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:05,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:53:05,577 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-22 09:53:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:06,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:06,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2020-12-22 09:53:06,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761964810] [2020-12-22 09:53:06,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:53:06,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:06,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:53:06,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1380, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:53:06,383 INFO L87 Difference]: Start difference. First operand 17611 states and 22312 transitions. Second operand 39 states. [2020-12-22 09:53:06,798 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-12-22 09:53:07,770 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-12-22 09:53:08,451 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-12-22 09:53:08,656 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-12-22 09:53:08,931 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-12-22 09:53:09,181 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-12-22 09:53:09,520 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-12-22 09:53:10,004 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-12-22 09:53:10,643 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2020-12-22 09:53:11,205 WARN L197 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 91 [2020-12-22 09:53:11,589 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-12-22 09:53:11,977 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-12-22 09:53:12,352 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:53:12,739 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:53:13,088 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:53:13,511 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-12-22 09:53:13,792 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:53:14,083 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:53:14,576 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:53:14,844 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:53:15,237 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:53:15,725 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 09:53:16,034 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:53:16,374 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-12-22 09:53:16,677 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 09:53:17,019 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 09:53:17,476 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-12-22 09:53:17,709 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-12-22 09:53:18,187 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:53:18,504 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 09:53:18,761 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:53:19,050 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2020-12-22 09:53:19,410 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-12-22 09:53:19,797 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-12-22 09:53:20,025 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:53:20,303 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:53:20,666 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-12-22 09:53:21,023 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 09:53:21,260 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:53:21,514 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:53:22,102 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 09:53:22,346 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:53:22,632 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-12-22 09:53:22,995 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:53:23,476 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:53:23,801 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-12-22 09:53:24,217 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 09:53:24,862 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:53:25,872 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-22 09:53:26,261 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-12-22 09:53:26,995 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2020-12-22 09:53:27,454 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-12-22 09:53:27,841 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-22 09:53:28,139 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-22 09:53:28,562 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 09:53:28,844 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-22 09:53:29,354 WARN L197 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-12-22 09:53:29,953 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-12-22 09:53:30,240 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:53:30,919 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 86 [2020-12-22 09:53:31,488 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2020-12-22 09:53:31,933 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-12-22 09:53:32,217 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-22 09:53:32,584 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 09:53:33,068 WARN L197 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-22 09:53:33,959 WARN L197 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 108 [2020-12-22 09:53:34,383 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:53:34,897 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:53:36,237 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-22 09:53:38,022 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-22 09:53:38,610 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-12-22 09:53:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:39,486 INFO L93 Difference]: Finished difference Result 28654 states and 35953 transitions. [2020-12-22 09:53:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-22 09:53:39,487 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-12-22 09:53:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:39,509 INFO L225 Difference]: With dead ends: 28654 [2020-12-22 09:53:39,509 INFO L226 Difference]: Without dead ends: 22901 [2020-12-22 09:53:39,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=2361, Invalid=12645, Unknown=0, NotChecked=0, Total=15006 [2020-12-22 09:53:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22901 states. [2020-12-22 09:53:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22901 to 16005. [2020-12-22 09:53:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16005 states. [2020-12-22 09:53:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16005 states to 16005 states and 20397 transitions. [2020-12-22 09:53:41,601 INFO L78 Accepts]: Start accepts. Automaton has 16005 states and 20397 transitions. Word has length 82 [2020-12-22 09:53:41,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:41,601 INFO L481 AbstractCegarLoop]: Abstraction has 16005 states and 20397 transitions. [2020-12-22 09:53:41,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 09:53:41,601 INFO L276 IsEmpty]: Start isEmpty. Operand 16005 states and 20397 transitions. [2020-12-22 09:53:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:53:41,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:41,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:41,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:53:41,804 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:41,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2052898573, now seen corresponding path program 1 times [2020-12-22 09:53:41,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:41,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241867435] [2020-12-22 09:53:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY