/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:52:01,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:52:01,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:52:01,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:52:01,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:52:01,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:52:01,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:52:01,521 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:52:01,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:52:01,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:52:01,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:52:01,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:52:01,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:52:01,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:52:01,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:52:01,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:52:01,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:52:01,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:52:01,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:52:01,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:52:01,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:52:01,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:52:01,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:52:01,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:52:01,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:52:01,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:52:01,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:52:01,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:52:01,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:52:01,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:52:01,598 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:52:01,598 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:52:01,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:52:01,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:52:01,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:52:01,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:52:01,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:52:01,656 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:52:01,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:52:01,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:52:01,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:52:01,662 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:52:01,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:52:01,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:52:01,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:52:01,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:52:01,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:52:01,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:52:01,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:52:01,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:52:01,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:52:01,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:52:01,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:52:01,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:52:01,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:52:01,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:52:01,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:52:01,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:52:01,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:52:01,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:52:01,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:52:01,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:52:01,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:52:02,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:52:02,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:52:02,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:52:02,157 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:52:02,158 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:52:02,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label04.c [2020-12-22 09:52:02,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92577b67/c78c8308f81f49b48a38c9491c2c9caa/FLAGe98fd186b [2020-12-22 09:52:03,334 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:52:03,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label04.c [2020-12-22 09:52:03,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92577b67/c78c8308f81f49b48a38c9491c2c9caa/FLAGe98fd186b [2020-12-22 09:52:03,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92577b67/c78c8308f81f49b48a38c9491c2c9caa [2020-12-22 09:52:03,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:52:03,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:52:03,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:03,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:52:03,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:52:03,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:03" (1/1) ... [2020-12-22 09:52:03,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64604e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:03, skipping insertion in model container [2020-12-22 09:52:03,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:52:03" (1/1) ... [2020-12-22 09:52:03,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:52:03,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:52:04,332 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label04.c[11767,11780] [2020-12-22 09:52:04,401 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label04.c[18585,18598] [2020-12-22 09:52:05,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:05,471 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:52:05,543 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label04.c[11767,11780] [2020-12-22 09:52:05,560 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label04.c[18585,18598] [2020-12-22 09:52:06,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:52:06,365 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:52:06,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06 WrapperNode [2020-12-22 09:52:06,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:52:06,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:06,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:52:06,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:52:06,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:06,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:06,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:52:06,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:52:06,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:52:06,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:52:07,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:07,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:07,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:07,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:07,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:07,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:07,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... [2020-12-22 09:52:07,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:52:07,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:52:07,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:52:07,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:52:07,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:52:07,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:52:07,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:52:07,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:52:07,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:52:13,320 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:52:13,320 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:52:13,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:13 BoogieIcfgContainer [2020-12-22 09:52:13,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:52:13,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:52:13,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:52:13,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:52:13,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:52:03" (1/3) ... [2020-12-22 09:52:13,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17961531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:13, skipping insertion in model container [2020-12-22 09:52:13,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:52:06" (2/3) ... [2020-12-22 09:52:13,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17961531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:52:13, skipping insertion in model container [2020-12-22 09:52:13,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:52:13" (3/3) ... [2020-12-22 09:52:13,333 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.BOUNDED-10.pals+Problem12_label04.c [2020-12-22 09:52:13,340 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:52:13,346 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:52:13,366 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:52:13,401 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:52:13,401 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:52:13,401 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:52:13,402 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:52:13,402 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:52:13,402 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:52:13,402 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:52:13,402 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:52:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:52:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:13,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:13,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:13,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:13,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:13,456 INFO L82 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2020-12-22 09:52:13,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:13,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968288362] [2020-12-22 09:52:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:13,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968288362] [2020-12-22 09:52:13,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:13,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:13,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189410212] [2020-12-22 09:52:13,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:52:13,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:13,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:52:13,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:52:13,836 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 2 states. [2020-12-22 09:52:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:13,934 INFO L93 Difference]: Finished difference Result 1781 states and 3374 transitions. [2020-12-22 09:52:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:52:13,935 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2020-12-22 09:52:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:13,976 INFO L225 Difference]: With dead ends: 1781 [2020-12-22 09:52:13,976 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:52:13,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:52:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:52:14,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:52:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:52:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1589 transitions. [2020-12-22 09:52:14,133 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1589 transitions. Word has length 34 [2020-12-22 09:52:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:14,134 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1589 transitions. [2020-12-22 09:52:14,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:52:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1589 transitions. [2020-12-22 09:52:14,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:52:14,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:14,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:14,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:52:14,137 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:14,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:14,138 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:52:14,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:14,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532100095] [2020-12-22 09:52:14,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:14,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532100095] [2020-12-22 09:52:14,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:14,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:14,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924927074] [2020-12-22 09:52:14,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:14,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:14,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:14,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:14,264 INFO L87 Difference]: Start difference. First operand 843 states and 1589 transitions. Second operand 5 states. [2020-12-22 09:52:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:14,396 INFO L93 Difference]: Finished difference Result 899 states and 1675 transitions. [2020-12-22 09:52:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:52:14,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:52:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:14,403 INFO L225 Difference]: With dead ends: 899 [2020-12-22 09:52:14,403 INFO L226 Difference]: Without dead ends: 843 [2020-12-22 09:52:14,405 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-12-22 09:52:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 843. [2020-12-22 09:52:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 843 states. [2020-12-22 09:52:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1558 transitions. [2020-12-22 09:52:14,433 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1558 transitions. Word has length 34 [2020-12-22 09:52:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:14,433 INFO L481 AbstractCegarLoop]: Abstraction has 843 states and 1558 transitions. [2020-12-22 09:52:14,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1558 transitions. [2020-12-22 09:52:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 09:52:14,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:14,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:14,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:52:14,437 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:14,438 INFO L82 PathProgramCache]: Analyzing trace with hash -80048283, now seen corresponding path program 1 times [2020-12-22 09:52:14,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:14,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382659874] [2020-12-22 09:52:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:14,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382659874] [2020-12-22 09:52:14,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:14,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:52:14,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675678150] [2020-12-22 09:52:14,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:14,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:14,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:14,656 INFO L87 Difference]: Start difference. First operand 843 states and 1558 transitions. Second operand 3 states. [2020-12-22 09:52:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:21,097 INFO L93 Difference]: Finished difference Result 2347 states and 4431 transitions. [2020-12-22 09:52:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:21,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 09:52:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:21,109 INFO L225 Difference]: With dead ends: 2347 [2020-12-22 09:52:21,110 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 09:52:21,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:21,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 09:52:21,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2020-12-22 09:52:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2020-12-22 09:52:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2537 transitions. [2020-12-22 09:52:21,163 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2537 transitions. Word has length 61 [2020-12-22 09:52:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:21,164 INFO L481 AbstractCegarLoop]: Abstraction has 1594 states and 2537 transitions. [2020-12-22 09:52:21,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2537 transitions. [2020-12-22 09:52:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:21,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:21,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:21,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:52:21,168 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:52:21,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:21,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742620984] [2020-12-22 09:52:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:21,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742620984] [2020-12-22 09:52:21,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:21,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:21,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939806294] [2020-12-22 09:52:21,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:21,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:21,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:21,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:21,305 INFO L87 Difference]: Start difference. First operand 1594 states and 2537 transitions. Second operand 3 states. [2020-12-22 09:52:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:21,353 INFO L93 Difference]: Finished difference Result 1692 states and 2691 transitions. [2020-12-22 09:52:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:21,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:21,368 INFO L225 Difference]: With dead ends: 1692 [2020-12-22 09:52:21,368 INFO L226 Difference]: Without dead ends: 1640 [2020-12-22 09:52:21,369 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 09:52:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2020-12-22 09:52:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2020-12-22 09:52:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1638 states. [2020-12-22 09:52:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2607 transitions. [2020-12-22 09:52:21,421 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2607 transitions. Word has length 64 [2020-12-22 09:52:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:21,421 INFO L481 AbstractCegarLoop]: Abstraction has 1638 states and 2607 transitions. [2020-12-22 09:52:21,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2607 transitions. [2020-12-22 09:52:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:21,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:21,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:21,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:52:21,424 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:52:21,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:21,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566783438] [2020-12-22 09:52:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:21,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566783438] [2020-12-22 09:52:21,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:21,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:21,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633277564] [2020-12-22 09:52:21,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:21,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:21,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:21,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:21,529 INFO L87 Difference]: Start difference. First operand 1638 states and 2607 transitions. Second operand 3 states. [2020-12-22 09:52:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:21,575 INFO L93 Difference]: Finished difference Result 1818 states and 2891 transitions. [2020-12-22 09:52:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:21,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:21,586 INFO L225 Difference]: With dead ends: 1818 [2020-12-22 09:52:21,587 INFO L226 Difference]: Without dead ends: 1722 [2020-12-22 09:52:21,588 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 09:52:21,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2020-12-22 09:52:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2020-12-22 09:52:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1720 states. [2020-12-22 09:52:21,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2736 transitions. [2020-12-22 09:52:21,696 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2736 transitions. Word has length 64 [2020-12-22 09:52:21,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:21,696 INFO L481 AbstractCegarLoop]: Abstraction has 1720 states and 2736 transitions. [2020-12-22 09:52:21,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2736 transitions. [2020-12-22 09:52:21,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:21,697 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:21,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:21,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:52:21,699 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:52:21,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:21,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300751825] [2020-12-22 09:52:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300751825] [2020-12-22 09:52:21,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:21,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:21,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153259582] [2020-12-22 09:52:21,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:21,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:21,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:21,834 INFO L87 Difference]: Start difference. First operand 1720 states and 2736 transitions. Second operand 3 states. [2020-12-22 09:52:21,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:21,886 INFO L93 Difference]: Finished difference Result 2052 states and 3258 transitions. [2020-12-22 09:52:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:21,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:21,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:21,898 INFO L225 Difference]: With dead ends: 2052 [2020-12-22 09:52:21,899 INFO L226 Difference]: Without dead ends: 1874 [2020-12-22 09:52:21,900 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 09:52:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-12-22 09:52:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2020-12-22 09:52:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2020-12-22 09:52:21,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2972 transitions. [2020-12-22 09:52:21,963 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2972 transitions. Word has length 64 [2020-12-22 09:52:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:21,964 INFO L481 AbstractCegarLoop]: Abstraction has 1872 states and 2972 transitions. [2020-12-22 09:52:21,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2972 transitions. [2020-12-22 09:52:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:21,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:21,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:21,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:52:21,966 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:21,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:21,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:52:21,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:21,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661810569] [2020-12-22 09:52:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:22,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661810569] [2020-12-22 09:52:22,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:22,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:22,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078156546] [2020-12-22 09:52:22,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:22,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:22,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:22,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:22,035 INFO L87 Difference]: Start difference. First operand 1872 states and 2972 transitions. Second operand 3 states. [2020-12-22 09:52:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:22,093 INFO L93 Difference]: Finished difference Result 2484 states and 3926 transitions. [2020-12-22 09:52:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:22,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:22,106 INFO L225 Difference]: With dead ends: 2484 [2020-12-22 09:52:22,106 INFO L226 Difference]: Without dead ends: 2154 [2020-12-22 09:52:22,108 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 09:52:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2020-12-22 09:52:22,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2020-12-22 09:52:22,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-12-22 09:52:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3400 transitions. [2020-12-22 09:52:22,181 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3400 transitions. Word has length 64 [2020-12-22 09:52:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:22,181 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 3400 transitions. [2020-12-22 09:52:22,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3400 transitions. [2020-12-22 09:52:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:22,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:22,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:22,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:52:22,183 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:52:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:22,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492842281] [2020-12-22 09:52:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:22,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492842281] [2020-12-22 09:52:22,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:22,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:22,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114249131] [2020-12-22 09:52:22,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:22,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:22,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:22,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:22,250 INFO L87 Difference]: Start difference. First operand 2152 states and 3400 transitions. Second operand 3 states. [2020-12-22 09:52:22,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:22,327 INFO L93 Difference]: Finished difference Result 3276 states and 5130 transitions. [2020-12-22 09:52:22,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:22,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:52:22,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:22,342 INFO L225 Difference]: With dead ends: 3276 [2020-12-22 09:52:22,342 INFO L226 Difference]: Without dead ends: 2666 [2020-12-22 09:52:22,345 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 09:52:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2020-12-22 09:52:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2020-12-22 09:52:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2020-12-22 09:52:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4168 transitions. [2020-12-22 09:52:22,447 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4168 transitions. Word has length 64 [2020-12-22 09:52:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:22,448 INFO L481 AbstractCegarLoop]: Abstraction has 2664 states and 4168 transitions. [2020-12-22 09:52:22,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4168 transitions. [2020-12-22 09:52:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:52:22,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:22,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:22,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:52:22,450 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:22,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:22,450 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:52:22,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:22,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897913859] [2020-12-22 09:52:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:22,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897913859] [2020-12-22 09:52:22,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:22,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:22,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821563507] [2020-12-22 09:52:22,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:22,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:22,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:22,564 INFO L87 Difference]: Start difference. First operand 2664 states and 4168 transitions. Second operand 7 states. [2020-12-22 09:52:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:23,316 INFO L93 Difference]: Finished difference Result 13884 states and 21298 transitions. [2020-12-22 09:52:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:52:23,317 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:52:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:23,424 INFO L225 Difference]: With dead ends: 13884 [2020-12-22 09:52:23,425 INFO L226 Difference]: Without dead ends: 12762 [2020-12-22 09:52:23,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:52:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2020-12-22 09:52:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2020-12-22 09:52:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-12-22 09:52:23,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5816 transitions. [2020-12-22 09:52:23,772 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5816 transitions. Word has length 64 [2020-12-22 09:52:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:23,772 INFO L481 AbstractCegarLoop]: Abstraction has 3784 states and 5816 transitions. [2020-12-22 09:52:23,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5816 transitions. [2020-12-22 09:52:23,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:23,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:23,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:23,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:52:23,782 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:23,783 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:52:23,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:23,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436528719] [2020-12-22 09:52:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436528719] [2020-12-22 09:52:23,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:23,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:52:23,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772206121] [2020-12-22 09:52:23,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:52:23,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:23,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:52:23,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:23,886 INFO L87 Difference]: Start difference. First operand 3784 states and 5816 transitions. Second operand 3 states. [2020-12-22 09:52:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:24,180 INFO L93 Difference]: Finished difference Result 7070 states and 10732 transitions. [2020-12-22 09:52:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:52:24,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:52:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:24,200 INFO L225 Difference]: With dead ends: 7070 [2020-12-22 09:52:24,201 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:52:24,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:52:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:52:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:52:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:52:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7322 transitions. [2020-12-22 09:52:24,486 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7322 transitions. Word has length 66 [2020-12-22 09:52:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:24,486 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7322 transitions. [2020-12-22 09:52:24,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:52:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7322 transitions. [2020-12-22 09:52:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:52:24,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:24,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:24,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:52:24,488 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:24,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:52:24,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:24,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833059098] [2020-12-22 09:52:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:24,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833059098] [2020-12-22 09:52:24,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:24,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:24,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613585041] [2020-12-22 09:52:24,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:24,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:24,745 INFO L87 Difference]: Start difference. First operand 4826 states and 7322 transitions. Second operand 7 states. [2020-12-22 09:52:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:25,216 INFO L93 Difference]: Finished difference Result 8110 states and 12188 transitions. [2020-12-22 09:52:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:25,217 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:52:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:25,232 INFO L225 Difference]: With dead ends: 8110 [2020-12-22 09:52:25,232 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:52:25,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:52:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:52:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:52:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:52:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7274 transitions. [2020-12-22 09:52:25,535 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7274 transitions. Word has length 66 [2020-12-22 09:52:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:25,535 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7274 transitions. [2020-12-22 09:52:25,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7274 transitions. [2020-12-22 09:52:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:25,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:25,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:25,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:52:25,537 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:52:25,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:25,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967375833] [2020-12-22 09:52:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:25,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967375833] [2020-12-22 09:52:25,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:25,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:25,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718503767] [2020-12-22 09:52:25,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:25,678 INFO L87 Difference]: Start difference. First operand 4826 states and 7274 transitions. Second operand 6 states. [2020-12-22 09:52:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:26,035 INFO L93 Difference]: Finished difference Result 8108 states and 12091 transitions. [2020-12-22 09:52:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:26,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:52:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:26,052 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:52:26,052 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:52:26,061 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 09:52:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:52:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:52:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:52:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7226 transitions. [2020-12-22 09:52:26,341 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7226 transitions. Word has length 67 [2020-12-22 09:52:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:26,342 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7226 transitions. [2020-12-22 09:52:26,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7226 transitions. [2020-12-22 09:52:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:26,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:26,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:26,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:52:26,343 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:52:26,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:26,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199952655] [2020-12-22 09:52:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:26,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199952655] [2020-12-22 09:52:26,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:26,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185226074] [2020-12-22 09:52:26,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:52:26,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:26,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:52:26,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:52:26,432 INFO L87 Difference]: Start difference. First operand 4826 states and 7226 transitions. Second operand 6 states. [2020-12-22 09:52:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:26,890 INFO L93 Difference]: Finished difference Result 8108 states and 11995 transitions. [2020-12-22 09:52:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:52:26,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:52:26,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:26,904 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:52:26,905 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:52:26,911 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 09:52:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:52:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:52:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:52:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7178 transitions. [2020-12-22 09:52:27,197 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7178 transitions. Word has length 67 [2020-12-22 09:52:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:27,198 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7178 transitions. [2020-12-22 09:52:27,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:52:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7178 transitions. [2020-12-22 09:52:27,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:52:27,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:27,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:27,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:52:27,200 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:52:27,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:27,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716044578] [2020-12-22 09:52:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:27,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716044578] [2020-12-22 09:52:27,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:27,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:52:27,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699215059] [2020-12-22 09:52:27,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:52:27,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:27,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:52:27,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:52:27,290 INFO L87 Difference]: Start difference. First operand 4826 states and 7178 transitions. Second operand 5 states. [2020-12-22 09:52:27,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:27,864 INFO L93 Difference]: Finished difference Result 7669 states and 11152 transitions. [2020-12-22 09:52:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:27,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:52:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:27,885 INFO L225 Difference]: With dead ends: 7669 [2020-12-22 09:52:27,886 INFO L226 Difference]: Without dead ends: 7667 [2020-12-22 09:52:27,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:52:27,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2020-12-22 09:52:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2020-12-22 09:52:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:52:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7354 transitions. [2020-12-22 09:52:28,274 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7354 transitions. Word has length 67 [2020-12-22 09:52:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:28,274 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7354 transitions. [2020-12-22 09:52:28,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:52:28,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7354 transitions. [2020-12-22 09:52:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:28,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:28,278 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:28,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:52:28,279 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:52:28,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:28,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299137070] [2020-12-22 09:52:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:52:28,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299137070] [2020-12-22 09:52:28,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:28,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:28,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903168597] [2020-12-22 09:52:28,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:28,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:28,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:28,409 INFO L87 Difference]: Start difference. First operand 5018 states and 7354 transitions. Second operand 7 states. [2020-12-22 09:52:30,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:30,300 INFO L93 Difference]: Finished difference Result 23094 states and 32784 transitions. [2020-12-22 09:52:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:30,301 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:30,353 INFO L225 Difference]: With dead ends: 23094 [2020-12-22 09:52:30,353 INFO L226 Difference]: Without dead ends: 19620 [2020-12-22 09:52:30,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19620 states. [2020-12-22 09:52:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19620 to 8490. [2020-12-22 09:52:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8490 states. [2020-12-22 09:52:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8490 states to 8490 states and 12202 transitions. [2020-12-22 09:52:31,151 INFO L78 Accepts]: Start accepts. Automaton has 8490 states and 12202 transitions. Word has length 95 [2020-12-22 09:52:31,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:31,151 INFO L481 AbstractCegarLoop]: Abstraction has 8490 states and 12202 transitions. [2020-12-22 09:52:31,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8490 states and 12202 transitions. [2020-12-22 09:52:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:31,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:31,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:31,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:52:31,161 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:31,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:52:31,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:31,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468381825] [2020-12-22 09:52:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:52:31,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468381825] [2020-12-22 09:52:31,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:31,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:31,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77058865] [2020-12-22 09:52:31,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:31,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:31,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:31,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:31,326 INFO L87 Difference]: Start difference. First operand 8490 states and 12202 transitions. Second operand 7 states. [2020-12-22 09:52:32,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:32,913 INFO L93 Difference]: Finished difference Result 26566 states and 37632 transitions. [2020-12-22 09:52:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:32,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:32,975 INFO L225 Difference]: With dead ends: 26566 [2020-12-22 09:52:32,975 INFO L226 Difference]: Without dead ends: 23092 [2020-12-22 09:52:32,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:33,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23092 states. [2020-12-22 09:52:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23092 to 13706. [2020-12-22 09:52:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13706 states. [2020-12-22 09:52:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13706 states to 13706 states and 19434 transitions. [2020-12-22 09:52:34,368 INFO L78 Accepts]: Start accepts. Automaton has 13706 states and 19434 transitions. Word has length 95 [2020-12-22 09:52:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:34,369 INFO L481 AbstractCegarLoop]: Abstraction has 13706 states and 19434 transitions. [2020-12-22 09:52:34,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 13706 states and 19434 transitions. [2020-12-22 09:52:34,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:34,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:34,376 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:34,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:52:34,376 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:34,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:34,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:52:34,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:34,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670398498] [2020-12-22 09:52:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:52:34,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670398498] [2020-12-22 09:52:34,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:34,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:34,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656372145] [2020-12-22 09:52:34,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:34,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:34,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:34,519 INFO L87 Difference]: Start difference. First operand 13706 states and 19434 transitions. Second operand 7 states. [2020-12-22 09:52:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:36,240 INFO L93 Difference]: Finished difference Result 30038 states and 42480 transitions. [2020-12-22 09:52:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:36,240 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:36,308 INFO L225 Difference]: With dead ends: 30038 [2020-12-22 09:52:36,308 INFO L226 Difference]: Without dead ends: 26564 [2020-12-22 09:52:36,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26564 states. [2020-12-22 09:52:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26564 to 17178. [2020-12-22 09:52:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17178 states. [2020-12-22 09:52:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17178 states to 17178 states and 24282 transitions. [2020-12-22 09:52:37,704 INFO L78 Accepts]: Start accepts. Automaton has 17178 states and 24282 transitions. Word has length 95 [2020-12-22 09:52:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:37,705 INFO L481 AbstractCegarLoop]: Abstraction has 17178 states and 24282 transitions. [2020-12-22 09:52:37,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17178 states and 24282 transitions. [2020-12-22 09:52:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:37,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:37,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:37,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:52:37,711 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:37,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:52:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:37,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14867516] [2020-12-22 09:52:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:52:37,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14867516] [2020-12-22 09:52:37,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:37,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:37,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727573443] [2020-12-22 09:52:37,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:37,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:37,846 INFO L87 Difference]: Start difference. First operand 17178 states and 24282 transitions. Second operand 7 states. [2020-12-22 09:52:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:39,703 INFO L93 Difference]: Finished difference Result 33510 states and 47328 transitions. [2020-12-22 09:52:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:39,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:39,774 INFO L225 Difference]: With dead ends: 33510 [2020-12-22 09:52:39,775 INFO L226 Difference]: Without dead ends: 30036 [2020-12-22 09:52:39,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:39,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30036 states. [2020-12-22 09:52:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30036 to 20650. [2020-12-22 09:52:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20650 states. [2020-12-22 09:52:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20650 states to 20650 states and 29130 transitions. [2020-12-22 09:52:41,230 INFO L78 Accepts]: Start accepts. Automaton has 20650 states and 29130 transitions. Word has length 95 [2020-12-22 09:52:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:41,231 INFO L481 AbstractCegarLoop]: Abstraction has 20650 states and 29130 transitions. [2020-12-22 09:52:41,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20650 states and 29130 transitions. [2020-12-22 09:52:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:52:41,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:41,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:41,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:52:41,240 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:41,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:41,240 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:52:41,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:41,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177475711] [2020-12-22 09:52:41,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:52:41,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177475711] [2020-12-22 09:52:41,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:52:41,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:52:41,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363826384] [2020-12-22 09:52:41,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:52:41,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:41,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:52:41,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:52:41,356 INFO L87 Difference]: Start difference. First operand 20650 states and 29130 transitions. Second operand 7 states. [2020-12-22 09:52:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:52:43,249 INFO L93 Difference]: Finished difference Result 34902 states and 49296 transitions. [2020-12-22 09:52:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:52:43,249 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:52:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:52:43,308 INFO L225 Difference]: With dead ends: 34902 [2020-12-22 09:52:43,308 INFO L226 Difference]: Without dead ends: 32468 [2020-12-22 09:52:43,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:52:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32468 states. [2020-12-22 09:52:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32468 to 23082. [2020-12-22 09:52:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23082 states. [2020-12-22 09:52:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23082 states to 23082 states and 32554 transitions. [2020-12-22 09:52:45,013 INFO L78 Accepts]: Start accepts. Automaton has 23082 states and 32554 transitions. Word has length 95 [2020-12-22 09:52:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:52:45,014 INFO L481 AbstractCegarLoop]: Abstraction has 23082 states and 32554 transitions. [2020-12-22 09:52:45,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:52:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 23082 states and 32554 transitions. [2020-12-22 09:52:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:52:45,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:52:45,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:52:45,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:52:45,023 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:52:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:52:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:52:45,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:52:45,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057718753] [2020-12-22 09:52:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:52:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:52:45,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057718753] [2020-12-22 09:52:45,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608237276] [2020-12-22 09:52:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:52:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:52:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:52:45,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:52:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:52:46,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:52:46,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:52:46,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244015197] [2020-12-22 09:52:46,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:52:46,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:52:46,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:52:46,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:52:46,111 INFO L87 Difference]: Start difference. First operand 23082 states and 32554 transitions. Second operand 21 states. [2020-12-22 09:53:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:53:00,503 INFO L93 Difference]: Finished difference Result 139883 states and 194035 transitions. [2020-12-22 09:53:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:53:00,503 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:53:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:53:00,737 INFO L225 Difference]: With dead ends: 139883 [2020-12-22 09:53:00,737 INFO L226 Difference]: Without dead ends: 118345 [2020-12-22 09:53:00,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:53:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118345 states. [2020-12-22 09:53:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118345 to 73762. [2020-12-22 09:53:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73762 states. [2020-12-22 09:53:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73762 states to 73762 states and 101962 transitions. [2020-12-22 09:53:08,204 INFO L78 Accepts]: Start accepts. Automaton has 73762 states and 101962 transitions. Word has length 96 [2020-12-22 09:53:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:53:08,205 INFO L481 AbstractCegarLoop]: Abstraction has 73762 states and 101962 transitions. [2020-12-22 09:53:08,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:53:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 73762 states and 101962 transitions. [2020-12-22 09:53:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:53:08,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:53:08,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:53:08,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:08,430 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:53:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:53:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:53:08,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:53:08,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293588875] [2020-12-22 09:53:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:53:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:08,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293588875] [2020-12-22 09:53:08,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137309268] [2020-12-22 09:53:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:53:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:53:09,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:53:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:53:09,449 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:53:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:53:10,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:53:10,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:53:10,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993528805] [2020-12-22 09:53:10,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:53:10,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:53:10,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:53:10,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:53:10,053 INFO L87 Difference]: Start difference. First operand 73762 states and 101962 transitions. Second operand 17 states. [2020-12-22 09:53:10,943 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:14,127 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:53:14,489 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:14,737 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:53:14,999 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:15,688 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:53:16,038 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:16,316 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:16,630 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:53:17,390 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:53:17,726 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:53:18,835 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:54:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:54:32,307 INFO L93 Difference]: Finished difference Result 859416 states and 1173557 transitions. [2020-12-22 09:54:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:54:32,308 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:54:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:54:34,042 INFO L225 Difference]: With dead ends: 859416 [2020-12-22 09:54:34,042 INFO L226 Difference]: Without dead ends: 787198 [2020-12-22 09:54:34,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:54:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787198 states. [2020-12-22 09:55:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787198 to 336518. [2020-12-22 09:55:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336518 states. [2020-12-22 09:55:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336518 states to 336518 states and 459026 transitions. [2020-12-22 09:55:11,840 INFO L78 Accepts]: Start accepts. Automaton has 336518 states and 459026 transitions. Word has length 97 [2020-12-22 09:55:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:11,841 INFO L481 AbstractCegarLoop]: Abstraction has 336518 states and 459026 transitions. [2020-12-22 09:55:11,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:55:11,841 INFO L276 IsEmpty]: Start isEmpty. Operand 336518 states and 459026 transitions. [2020-12-22 09:55:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:55:11,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:11,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:12,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:55:12,079 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:12,080 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:55:12,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:12,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802589346] [2020-12-22 09:55:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:12,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802589346] [2020-12-22 09:55:12,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:12,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:55:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33243783] [2020-12-22 09:55:12,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:12,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:12,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:12,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:12,146 INFO L87 Difference]: Start difference. First operand 336518 states and 459026 transitions. Second operand 3 states.