/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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:23:17,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:23:17,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:23:17,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:23:17,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:23:17,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:23:17,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:23:17,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:23:17,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:23:17,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:23:17,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:23:17,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:23:17,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:23:17,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:23:17,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:23:17,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:23:17,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:23:17,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:23:17,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:23:17,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:23:17,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:23:17,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:23:17,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:23:17,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:23:17,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:23:17,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:23:17,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:23:17,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:23:17,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:23:17,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:23:17,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:23:17,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:23:17,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:23:17,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:23:17,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:23:17,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:23:17,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:23:17,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:23:17,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:23:17,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:23:17,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:23:17,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:23:17,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:23:17,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:23:17,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:23:17,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:23:17,623 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:23:17,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:23:17,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:23:17,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:23:17,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:23:17,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:23:17,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:23:17,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:23:17,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:23:17,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:23:17,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:23:17,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:23:17,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:23:17,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:23:17,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:23:17,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:23:17,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:23:17,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:23:17,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:23:17,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:23:17,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:23:17,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:23:18,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:23:18,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:23:18,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:23:18,097 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:23:18,098 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:23:18,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2020-12-22 13:23:18,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab17461e7/1cedb20416af4b3f8952b78a09c65014/FLAGa9cee73d3 [2020-12-22 13:23:19,327 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:23:19,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2020-12-22 13:23:19,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab17461e7/1cedb20416af4b3f8952b78a09c65014/FLAGa9cee73d3 [2020-12-22 13:23:19,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab17461e7/1cedb20416af4b3f8952b78a09c65014 [2020-12-22 13:23:19,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:23:19,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:23:19,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:23:19,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:23:19,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:23:19,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:23:19" (1/1) ... [2020-12-22 13:23:19,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e99a33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:19, skipping insertion in model container [2020-12-22 13:23:19,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:23:19" (1/1) ... [2020-12-22 13:23:19,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:23:19,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:23:21,100 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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2020-12-22 13:23:22,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:23:22,035 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:23:22,347 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/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2020-12-22 13:23:22,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:23:22,907 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:23:22,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22 WrapperNode [2020-12-22 13:23:22,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:23:22,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:23:22,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:23:22,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:23:22,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:23:23,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:23:23,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:23:23,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:23:23,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (1/1) ... [2020-12-22 13:23:23,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:23:23,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:23:23,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:23:23,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:23:23,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (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 13:23:23,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:23:23,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:23:23,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:23:23,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:23:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:23:23,590 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2020-12-22 13:23:23,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:23:23,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:23:23,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:23:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:23:23,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:23:23,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:23:35,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:23:35,705 INFO L299 CfgBuilder]: Removed 453 assume(true) statements. [2020-12-22 13:23:35,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:35 BoogieIcfgContainer [2020-12-22 13:23:35,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:23:35,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:23:35,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:23:35,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:23:35,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:23:19" (1/3) ... [2020-12-22 13:23:35,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a4a5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:23:35, skipping insertion in model container [2020-12-22 13:23:35,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:22" (2/3) ... [2020-12-22 13:23:35,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a4a5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:23:35, skipping insertion in model container [2020-12-22 13:23:35,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:35" (3/3) ... [2020-12-22 13:23:35,721 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2020-12-22 13:23:35,729 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:23:35,735 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:23:35,756 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:23:35,790 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:23:35,790 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:23:35,790 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:23:35,790 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:23:35,790 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:23:35,791 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:23:35,791 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:23:35,791 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:23:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states. [2020-12-22 13:23:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 13:23:35,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:35,830 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] [2020-12-22 13:23:35,831 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:35,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1244740702, now seen corresponding path program 1 times [2020-12-22 13:23:35,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:35,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16812041] [2020-12-22 13:23:35,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:36,644 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 13:23:36,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16812041] [2020-12-22 13:23:36,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:36,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:36,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820241676] [2020-12-22 13:23:36,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:36,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:36,671 INFO L87 Difference]: Start difference. First operand 732 states. Second operand 3 states. [2020-12-22 13:23:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:36,835 INFO L93 Difference]: Finished difference Result 1460 states and 2219 transitions. [2020-12-22 13:23:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:36,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 13:23:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:36,861 INFO L225 Difference]: With dead ends: 1460 [2020-12-22 13:23:36,861 INFO L226 Difference]: Without dead ends: 725 [2020-12-22 13:23:36,869 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 13:23:36,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2020-12-22 13:23:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 725. [2020-12-22 13:23:36,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2020-12-22 13:23:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1078 transitions. [2020-12-22 13:23:36,970 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1078 transitions. Word has length 20 [2020-12-22 13:23:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:36,970 INFO L481 AbstractCegarLoop]: Abstraction has 725 states and 1078 transitions. [2020-12-22 13:23:36,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1078 transitions. [2020-12-22 13:23:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 13:23:36,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:36,973 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] [2020-12-22 13:23:36,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:23:36,974 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:36,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:36,975 INFO L82 PathProgramCache]: Analyzing trace with hash -609490989, now seen corresponding path program 1 times [2020-12-22 13:23:36,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:36,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074910326] [2020-12-22 13:23:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:23:37,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074910326] [2020-12-22 13:23:37,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:37,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:37,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565282010] [2020-12-22 13:23:37,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:37,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:37,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:37,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:37,360 INFO L87 Difference]: Start difference. First operand 725 states and 1078 transitions. Second operand 3 states. [2020-12-22 13:23:39,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:39,628 INFO L93 Difference]: Finished difference Result 2134 states and 3188 transitions. [2020-12-22 13:23:39,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:39,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-22 13:23:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:39,644 INFO L225 Difference]: With dead ends: 2134 [2020-12-22 13:23:39,645 INFO L226 Difference]: Without dead ends: 1421 [2020-12-22 13:23:39,650 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 13:23:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2020-12-22 13:23:39,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1421. [2020-12-22 13:23:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1421 states. [2020-12-22 13:23:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 2121 transitions. [2020-12-22 13:23:39,746 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 2121 transitions. Word has length 21 [2020-12-22 13:23:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:39,747 INFO L481 AbstractCegarLoop]: Abstraction has 1421 states and 2121 transitions. [2020-12-22 13:23:39,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 2121 transitions. [2020-12-22 13:23:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 13:23:39,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:39,759 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] [2020-12-22 13:23:39,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:23:39,760 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:39,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1977023298, now seen corresponding path program 1 times [2020-12-22 13:23:39,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:39,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868709874] [2020-12-22 13:23:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:23:40,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868709874] [2020-12-22 13:23:40,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:40,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:40,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315865065] [2020-12-22 13:23:40,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:40,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:40,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:40,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:40,195 INFO L87 Difference]: Start difference. First operand 1421 states and 2121 transitions. Second operand 3 states. [2020-12-22 13:23:40,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:40,315 INFO L93 Difference]: Finished difference Result 1431 states and 2129 transitions. [2020-12-22 13:23:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:40,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-12-22 13:23:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:40,325 INFO L225 Difference]: With dead ends: 1431 [2020-12-22 13:23:40,326 INFO L226 Difference]: Without dead ends: 1426 [2020-12-22 13:23:40,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2020-12-22 13:23:40,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1421. [2020-12-22 13:23:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1421 states. [2020-12-22 13:23:40,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 2120 transitions. [2020-12-22 13:23:40,386 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 2120 transitions. Word has length 28 [2020-12-22 13:23:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:40,387 INFO L481 AbstractCegarLoop]: Abstraction has 1421 states and 2120 transitions. [2020-12-22 13:23:40,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 2120 transitions. [2020-12-22 13:23:40,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 13:23:40,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:40,389 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] [2020-12-22 13:23:40,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:23:40,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:40,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:40,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1919764996, now seen corresponding path program 1 times [2020-12-22 13:23:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:40,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140570700] [2020-12-22 13:23:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:23:40,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140570700] [2020-12-22 13:23:40,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:40,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:23:40,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015342453] [2020-12-22 13:23:40,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:23:40,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:40,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:23:40,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:23:40,792 INFO L87 Difference]: Start difference. First operand 1421 states and 2120 transitions. Second operand 5 states. [2020-12-22 13:23:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:41,211 INFO L93 Difference]: Finished difference Result 4237 states and 6331 transitions. [2020-12-22 13:23:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:23:41,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-12-22 13:23:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:41,231 INFO L225 Difference]: With dead ends: 4237 [2020-12-22 13:23:41,231 INFO L226 Difference]: Without dead ends: 2823 [2020-12-22 13:23:41,235 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 13:23:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2020-12-22 13:23:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2807. [2020-12-22 13:23:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2807 states. [2020-12-22 13:23:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 4194 transitions. [2020-12-22 13:23:41,333 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 4194 transitions. Word has length 28 [2020-12-22 13:23:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:41,334 INFO L481 AbstractCegarLoop]: Abstraction has 2807 states and 4194 transitions. [2020-12-22 13:23:41,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:23:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 4194 transitions. [2020-12-22 13:23:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 13:23:41,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:41,343 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:23:41,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:23:41,344 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:41,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1486974865, now seen corresponding path program 1 times [2020-12-22 13:23:41,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:41,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741746345] [2020-12-22 13:23:41,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:23:41,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741746345] [2020-12-22 13:23:41,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:41,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:41,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692092547] [2020-12-22 13:23:41,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:41,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:41,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:41,678 INFO L87 Difference]: Start difference. First operand 2807 states and 4194 transitions. Second operand 3 states. [2020-12-22 13:23:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:41,931 INFO L93 Difference]: Finished difference Result 5934 states and 8898 transitions. [2020-12-22 13:23:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:41,933 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 13:23:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:41,952 INFO L225 Difference]: With dead ends: 5934 [2020-12-22 13:23:41,952 INFO L226 Difference]: Without dead ends: 3139 [2020-12-22 13:23:41,961 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 13:23:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2020-12-22 13:23:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3129. [2020-12-22 13:23:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3129 states. [2020-12-22 13:23:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3129 states to 3129 states and 4705 transitions. [2020-12-22 13:23:42,146 INFO L78 Accepts]: Start accepts. Automaton has 3129 states and 4705 transitions. Word has length 58 [2020-12-22 13:23:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:42,147 INFO L481 AbstractCegarLoop]: Abstraction has 3129 states and 4705 transitions. [2020-12-22 13:23:42,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3129 states and 4705 transitions. [2020-12-22 13:23:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 13:23:42,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:42,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 13:23:42,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:23:42,153 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:42,154 INFO L82 PathProgramCache]: Analyzing trace with hash 583787059, now seen corresponding path program 1 times [2020-12-22 13:23:42,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:42,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079112101] [2020-12-22 13:23:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:23:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079112101] [2020-12-22 13:23:42,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:42,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:42,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28561286] [2020-12-22 13:23:42,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:42,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:42,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:42,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:42,476 INFO L87 Difference]: Start difference. First operand 3129 states and 4705 transitions. Second operand 3 states. [2020-12-22 13:23:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:44,823 INFO L93 Difference]: Finished difference Result 6630 states and 10016 transitions. [2020-12-22 13:23:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:44,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 13:23:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:44,843 INFO L225 Difference]: With dead ends: 6630 [2020-12-22 13:23:44,844 INFO L226 Difference]: Without dead ends: 3513 [2020-12-22 13:23:44,850 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 13:23:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3513 states. [2020-12-22 13:23:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3513 to 3503. [2020-12-22 13:23:44,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3503 states. [2020-12-22 13:23:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5288 transitions. [2020-12-22 13:23:44,980 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5288 transitions. Word has length 66 [2020-12-22 13:23:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:44,980 INFO L481 AbstractCegarLoop]: Abstraction has 3503 states and 5288 transitions. [2020-12-22 13:23:44,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5288 transitions. [2020-12-22 13:23:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 13:23:44,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:44,987 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:44,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:23:44,987 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:44,988 INFO L82 PathProgramCache]: Analyzing trace with hash -704359164, now seen corresponding path program 1 times [2020-12-22 13:23:44,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:44,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155513151] [2020-12-22 13:23:44,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:23:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155513151] [2020-12-22 13:23:45,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:45,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:45,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645573803] [2020-12-22 13:23:45,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:45,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:45,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:45,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:45,248 INFO L87 Difference]: Start difference. First operand 3503 states and 5288 transitions. Second operand 3 states. [2020-12-22 13:23:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:47,600 INFO L93 Difference]: Finished difference Result 7373 states and 11178 transitions. [2020-12-22 13:23:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:47,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 13:23:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:47,623 INFO L225 Difference]: With dead ends: 7373 [2020-12-22 13:23:47,624 INFO L226 Difference]: Without dead ends: 3882 [2020-12-22 13:23:47,631 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 13:23:47,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2020-12-22 13:23:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3877. [2020-12-22 13:23:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3877 states. [2020-12-22 13:23:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 5875 transitions. [2020-12-22 13:23:47,871 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 5875 transitions. Word has length 83 [2020-12-22 13:23:47,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:47,871 INFO L481 AbstractCegarLoop]: Abstraction has 3877 states and 5875 transitions. [2020-12-22 13:23:47,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 5875 transitions. [2020-12-22 13:23:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 13:23:47,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:47,879 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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 13:23:47,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:23:47,880 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:47,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2013961093, now seen corresponding path program 1 times [2020-12-22 13:23:47,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:47,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419121980] [2020-12-22 13:23:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 13:23:48,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419121980] [2020-12-22 13:23:48,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:48,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:23:48,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429273886] [2020-12-22 13:23:48,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:23:48,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:48,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:23:48,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:48,209 INFO L87 Difference]: Start difference. First operand 3877 states and 5875 transitions. Second operand 4 states. [2020-12-22 13:23:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:48,717 INFO L93 Difference]: Finished difference Result 18671 states and 28378 transitions. [2020-12-22 13:23:48,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:23:48,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-12-22 13:23:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:48,786 INFO L225 Difference]: With dead ends: 18671 [2020-12-22 13:23:48,786 INFO L226 Difference]: Without dead ends: 14806 [2020-12-22 13:23:48,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:23:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14806 states. [2020-12-22 13:23:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14806 to 3893. [2020-12-22 13:23:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3893 states. [2020-12-22 13:23:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5891 transitions. [2020-12-22 13:23:49,144 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5891 transitions. Word has length 102 [2020-12-22 13:23:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:49,144 INFO L481 AbstractCegarLoop]: Abstraction has 3893 states and 5891 transitions. [2020-12-22 13:23:49,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:23:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5891 transitions. [2020-12-22 13:23:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 13:23:49,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:49,152 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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, 1] [2020-12-22 13:23:49,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:23:49,152 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1937361133, now seen corresponding path program 1 times [2020-12-22 13:23:49,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:49,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318000872] [2020-12-22 13:23:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 13:23:49,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318000872] [2020-12-22 13:23:49,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:49,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:23:49,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308950250] [2020-12-22 13:23:49,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:23:49,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:49,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:23:49,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:49,488 INFO L87 Difference]: Start difference. First operand 3893 states and 5891 transitions. Second operand 4 states. [2020-12-22 13:23:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:49,809 INFO L93 Difference]: Finished difference Result 9407 states and 14265 transitions. [2020-12-22 13:23:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:23:49,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 13:23:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:49,825 INFO L225 Difference]: With dead ends: 9407 [2020-12-22 13:23:49,829 INFO L226 Difference]: Without dead ends: 5526 [2020-12-22 13:23:49,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:23:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2020-12-22 13:23:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 3893. [2020-12-22 13:23:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3893 states. [2020-12-22 13:23:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5887 transitions. [2020-12-22 13:23:50,046 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5887 transitions. Word has length 105 [2020-12-22 13:23:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:50,048 INFO L481 AbstractCegarLoop]: Abstraction has 3893 states and 5887 transitions. [2020-12-22 13:23:50,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:23:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5887 transitions. [2020-12-22 13:23:50,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 13:23:50,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:50,057 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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, 1] [2020-12-22 13:23:50,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:23:50,057 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:50,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:50,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1350555119, now seen corresponding path program 1 times [2020-12-22 13:23:50,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:50,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841497221] [2020-12-22 13:23:50,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 13:23:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841497221] [2020-12-22 13:23:50,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836788236] [2020-12-22 13:23:50,559 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 13:23:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 2916 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:23:52,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:23:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 13:23:53,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:23:53,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:23:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328590336] [2020-12-22 13:23:53,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:23:53,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:23:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:23:53,023 INFO L87 Difference]: Start difference. First operand 3893 states and 5887 transitions. Second operand 6 states. [2020-12-22 13:23:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:55,682 INFO L93 Difference]: Finished difference Result 12533 states and 18953 transitions. [2020-12-22 13:23:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:23:55,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-12-22 13:23:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:55,707 INFO L225 Difference]: With dead ends: 12533 [2020-12-22 13:23:55,707 INFO L226 Difference]: Without dead ends: 8650 [2020-12-22 13:23:55,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:23:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8650 states. [2020-12-22 13:23:56,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8650 to 7288. [2020-12-22 13:23:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7288 states. [2020-12-22 13:23:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7288 states to 7288 states and 11039 transitions. [2020-12-22 13:23:56,076 INFO L78 Accepts]: Start accepts. Automaton has 7288 states and 11039 transitions. Word has length 105 [2020-12-22 13:23:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:56,077 INFO L481 AbstractCegarLoop]: Abstraction has 7288 states and 11039 transitions. [2020-12-22 13:23:56,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:23:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 7288 states and 11039 transitions. [2020-12-22 13:23:56,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 13:23:56,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:56,088 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:56,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 13:23:56,303 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:56,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:56,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1216670383, now seen corresponding path program 1 times [2020-12-22 13:23:56,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:56,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226037019] [2020-12-22 13:23:56,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:23:56,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226037019] [2020-12-22 13:23:56,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14011925] [2020-12-22 13:23:56,797 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 13:23:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:59,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 2997 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:23:59,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:23:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 13:23:59,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:23:59,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-12-22 13:23:59,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011124619] [2020-12-22 13:23:59,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:59,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:59,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:23:59,296 INFO L87 Difference]: Start difference. First operand 7288 states and 11039 transitions. Second operand 3 states. [2020-12-22 13:24:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:01,822 INFO L93 Difference]: Finished difference Result 14563 states and 22063 transitions. [2020-12-22 13:24:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:24:01,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 13:24:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:01,843 INFO L225 Difference]: With dead ends: 14563 [2020-12-22 13:24:01,844 INFO L226 Difference]: Without dead ends: 7045 [2020-12-22 13:24:01,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:24:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7045 states. [2020-12-22 13:24:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7045 to 7045. [2020-12-22 13:24:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7045 states. [2020-12-22 13:24:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7045 states to 7045 states and 10623 transitions. [2020-12-22 13:24:02,275 INFO L78 Accepts]: Start accepts. Automaton has 7045 states and 10623 transitions. Word has length 113 [2020-12-22 13:24:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:02,276 INFO L481 AbstractCegarLoop]: Abstraction has 7045 states and 10623 transitions. [2020-12-22 13:24:02,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:24:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 7045 states and 10623 transitions. [2020-12-22 13:24:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 13:24:02,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:02,293 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:24:02,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:24:02,508 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:02,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1201233683, now seen corresponding path program 1 times [2020-12-22 13:24:02,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:02,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458491965] [2020-12-22 13:24:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 13:24:02,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458491965] [2020-12-22 13:24:02,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:02,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:24:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551007498] [2020-12-22 13:24:02,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:24:02,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:02,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:24:02,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:24:02,726 INFO L87 Difference]: Start difference. First operand 7045 states and 10623 transitions. Second operand 3 states. [2020-12-22 13:24:05,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:05,015 INFO L93 Difference]: Finished difference Result 10518 states and 15858 transitions. [2020-12-22 13:24:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:24:05,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 13:24:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:05,025 INFO L225 Difference]: With dead ends: 10518 [2020-12-22 13:24:05,025 INFO L226 Difference]: Without dead ends: 3485 [2020-12-22 13:24:05,035 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 13:24:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2020-12-22 13:24:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 3485. [2020-12-22 13:24:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3485 states. [2020-12-22 13:24:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 5248 transitions. [2020-12-22 13:24:05,195 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 5248 transitions. Word has length 113 [2020-12-22 13:24:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:05,195 INFO L481 AbstractCegarLoop]: Abstraction has 3485 states and 5248 transitions. [2020-12-22 13:24:05,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:24:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 5248 transitions. [2020-12-22 13:24:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 13:24:05,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:05,204 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:24:05,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:24:05,205 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:05,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:05,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1735439362, now seen corresponding path program 1 times [2020-12-22 13:24:05,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:05,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455160354] [2020-12-22 13:24:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 13:24:06,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455160354] [2020-12-22 13:24:06,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726577794] [2020-12-22 13:24:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:24:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 3150 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:24:08,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:24:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 13:24:08,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:24:08,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:24:08,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566106492] [2020-12-22 13:24:08,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:24:08,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:08,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:24:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:24:08,406 INFO L87 Difference]: Start difference. First operand 3485 states and 5248 transitions. Second operand 8 states. [2020-12-22 13:24:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:08,583 INFO L93 Difference]: Finished difference Result 6960 states and 10485 transitions. [2020-12-22 13:24:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:24:08,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-12-22 13:24:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:08,594 INFO L225 Difference]: With dead ends: 6960 [2020-12-22 13:24:08,594 INFO L226 Difference]: Without dead ends: 3486 [2020-12-22 13:24:08,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:24:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2020-12-22 13:24:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 3486. [2020-12-22 13:24:08,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3486 states. [2020-12-22 13:24:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 5249 transitions. [2020-12-22 13:24:08,752 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 5249 transitions. Word has length 135 [2020-12-22 13:24:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:08,753 INFO L481 AbstractCegarLoop]: Abstraction has 3486 states and 5249 transitions. [2020-12-22 13:24:08,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:24:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 5249 transitions. [2020-12-22 13:24:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 13:24:08,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:08,760 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:24:08,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 13:24:08,974 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1230750675, now seen corresponding path program 2 times [2020-12-22 13:24:08,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:08,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007759002] [2020-12-22 13:24:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 13:24:09,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007759002] [2020-12-22 13:24:09,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48908537] [2020-12-22 13:24:09,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:25:49,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:25:49,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:25:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 3156 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:25:49,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:25:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 13:25:50,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:25:50,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:25:50,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209338101] [2020-12-22 13:25:50,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:25:50,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:25:50,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:25:50,269 INFO L87 Difference]: Start difference. First operand 3486 states and 5249 transitions. Second operand 10 states. [2020-12-22 13:25:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:50,450 INFO L93 Difference]: Finished difference Result 6961 states and 10486 transitions. [2020-12-22 13:25:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:25:50,451 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2020-12-22 13:25:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:50,460 INFO L225 Difference]: With dead ends: 6961 [2020-12-22 13:25:50,460 INFO L226 Difference]: Without dead ends: 3487 [2020-12-22 13:25:50,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:25:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2020-12-22 13:25:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 3487. [2020-12-22 13:25:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3487 states. [2020-12-22 13:25:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3487 states to 3487 states and 5250 transitions. [2020-12-22 13:25:50,668 INFO L78 Accepts]: Start accepts. Automaton has 3487 states and 5250 transitions. Word has length 136 [2020-12-22 13:25:50,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:50,669 INFO L481 AbstractCegarLoop]: Abstraction has 3487 states and 5250 transitions. [2020-12-22 13:25:50,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:25:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3487 states and 5250 transitions. [2020-12-22 13:25:50,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 13:25:50,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:50,676 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:25:50,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:25:50,892 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:50,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1529696734, now seen corresponding path program 3 times [2020-12-22 13:25:50,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:50,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256500276] [2020-12-22 13:25:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:25:51,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256500276] [2020-12-22 13:25:51,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:25:51,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:25:51,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386682056] [2020-12-22 13:25:51,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:25:51,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:51,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:25:51,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:25:51,399 INFO L87 Difference]: Start difference. First operand 3487 states and 5250 transitions. Second operand 5 states. [2020-12-22 13:25:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:53,876 INFO L93 Difference]: Finished difference Result 9194 states and 13823 transitions. [2020-12-22 13:25:53,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:25:53,878 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2020-12-22 13:25:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:53,893 INFO L225 Difference]: With dead ends: 9194 [2020-12-22 13:25:53,895 INFO L226 Difference]: Without dead ends: 5814 [2020-12-22 13:25:53,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:25:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5814 states. [2020-12-22 13:25:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5814 to 3871. [2020-12-22 13:25:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3871 states. [2020-12-22 13:25:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 5818 transitions. [2020-12-22 13:25:54,103 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 5818 transitions. Word has length 137 [2020-12-22 13:25:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:54,104 INFO L481 AbstractCegarLoop]: Abstraction has 3871 states and 5818 transitions. [2020-12-22 13:25:54,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:25:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 5818 transitions. [2020-12-22 13:25:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 13:25:54,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:54,112 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:25:54,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 13:25:54,112 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:54,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:54,113 INFO L82 PathProgramCache]: Analyzing trace with hash 224943928, now seen corresponding path program 1 times [2020-12-22 13:25:54,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:54,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852393399] [2020-12-22 13:25:54,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:25:54,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852393399] [2020-12-22 13:25:54,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:25:54,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:25:54,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864968838] [2020-12-22 13:25:54,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:25:54,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:25:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:25:54,375 INFO L87 Difference]: Start difference. First operand 3871 states and 5818 transitions. Second operand 3 states. [2020-12-22 13:25:54,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:54,583 INFO L93 Difference]: Finished difference Result 7639 states and 11488 transitions. [2020-12-22 13:25:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:25:54,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2020-12-22 13:25:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:54,595 INFO L225 Difference]: With dead ends: 7639 [2020-12-22 13:25:54,595 INFO L226 Difference]: Without dead ends: 3875 [2020-12-22 13:25:54,606 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 13:25:54,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2020-12-22 13:25:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 3875. [2020-12-22 13:25:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3875 states. [2020-12-22 13:25:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5822 transitions. [2020-12-22 13:25:54,788 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5822 transitions. Word has length 169 [2020-12-22 13:25:54,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:54,789 INFO L481 AbstractCegarLoop]: Abstraction has 3875 states and 5822 transitions. [2020-12-22 13:25:54,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:25:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5822 transitions. [2020-12-22 13:25:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 13:25:54,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:54,798 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:25:54,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 13:25:54,798 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:54,799 INFO L82 PathProgramCache]: Analyzing trace with hash -867691274, now seen corresponding path program 1 times [2020-12-22 13:25:54,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:54,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807301104] [2020-12-22 13:25:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 13:25:55,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807301104] [2020-12-22 13:25:55,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:25:55,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:25:55,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765314007] [2020-12-22 13:25:55,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:25:55,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:25:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:25:55,353 INFO L87 Difference]: Start difference. First operand 3875 states and 5822 transitions. Second operand 5 states. [2020-12-22 13:25:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:57,798 INFO L93 Difference]: Finished difference Result 9356 states and 14076 transitions. [2020-12-22 13:25:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:25:57,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-12-22 13:25:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:57,809 INFO L225 Difference]: With dead ends: 9356 [2020-12-22 13:25:57,810 INFO L226 Difference]: Without dead ends: 5588 [2020-12-22 13:25:57,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:25:57,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5588 states. [2020-12-22 13:25:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5588 to 3931. [2020-12-22 13:25:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3931 states. [2020-12-22 13:25:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 5906 transitions. [2020-12-22 13:25:58,028 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 5906 transitions. Word has length 169 [2020-12-22 13:25:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:58,029 INFO L481 AbstractCegarLoop]: Abstraction has 3931 states and 5906 transitions. [2020-12-22 13:25:58,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:25:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 5906 transitions. [2020-12-22 13:25:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 13:25:58,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:58,100 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:25:58,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 13:25:58,101 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:58,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:58,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1997267163, now seen corresponding path program 1 times [2020-12-22 13:25:58,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:58,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765196124] [2020-12-22 13:25:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:25:58,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765196124] [2020-12-22 13:25:58,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:25:58,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 13:25:58,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480372773] [2020-12-22 13:25:58,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:25:58,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:25:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:25:58,864 INFO L87 Difference]: Start difference. First operand 3931 states and 5906 transitions. Second operand 7 states. [2020-12-22 13:26:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:00,340 INFO L93 Difference]: Finished difference Result 17586 states and 26437 transitions. [2020-12-22 13:26:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:26:00,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 171 [2020-12-22 13:26:00,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:00,368 INFO L225 Difference]: With dead ends: 17586 [2020-12-22 13:26:00,368 INFO L226 Difference]: Without dead ends: 13762 [2020-12-22 13:26:00,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:26:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13762 states. [2020-12-22 13:26:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13762 to 3951. [2020-12-22 13:26:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3951 states. [2020-12-22 13:26:00,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 5926 transitions. [2020-12-22 13:26:00,799 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 5926 transitions. Word has length 171 [2020-12-22 13:26:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:00,800 INFO L481 AbstractCegarLoop]: Abstraction has 3951 states and 5926 transitions. [2020-12-22 13:26:00,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:26:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 5926 transitions. [2020-12-22 13:26:00,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-12-22 13:26:00,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:00,807 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:00,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 13:26:00,807 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:00,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:00,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1246341257, now seen corresponding path program 1 times [2020-12-22 13:26:00,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:00,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291873914] [2020-12-22 13:26:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:26:01,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291873914] [2020-12-22 13:26:01,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:26:01,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:26:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078415451] [2020-12-22 13:26:01,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:26:01,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:26:01,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:26:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:26:01,485 INFO L87 Difference]: Start difference. First operand 3951 states and 5926 transitions. Second operand 5 states. [2020-12-22 13:26:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:02,611 INFO L93 Difference]: Finished difference Result 18390 states and 27625 transitions. [2020-12-22 13:26:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:26:02,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2020-12-22 13:26:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:02,635 INFO L225 Difference]: With dead ends: 18390 [2020-12-22 13:26:02,635 INFO L226 Difference]: Without dead ends: 14546 [2020-12-22 13:26:02,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:26:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14546 states. [2020-12-22 13:26:03,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14546 to 3963. [2020-12-22 13:26:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3963 states. [2020-12-22 13:26:03,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 5938 transitions. [2020-12-22 13:26:03,058 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 5938 transitions. Word has length 173 [2020-12-22 13:26:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:03,058 INFO L481 AbstractCegarLoop]: Abstraction has 3963 states and 5938 transitions. [2020-12-22 13:26:03,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:26:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 5938 transitions. [2020-12-22 13:26:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-22 13:26:03,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:03,065 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:03,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 13:26:03,065 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:03,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:03,066 INFO L82 PathProgramCache]: Analyzing trace with hash 197480787, now seen corresponding path program 1 times [2020-12-22 13:26:03,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:03,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251030350] [2020-12-22 13:26:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:03,806 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:26:03,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251030350] [2020-12-22 13:26:03,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:26:03,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:26:03,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133860348] [2020-12-22 13:26:03,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:26:03,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:26:03,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:26:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:26:03,808 INFO L87 Difference]: Start difference. First operand 3963 states and 5938 transitions. Second operand 5 states. [2020-12-22 13:26:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:04,862 INFO L93 Difference]: Finished difference Result 13132 states and 19715 transitions. [2020-12-22 13:26:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:26:04,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2020-12-22 13:26:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:04,877 INFO L225 Difference]: With dead ends: 13132 [2020-12-22 13:26:04,877 INFO L226 Difference]: Without dead ends: 9276 [2020-12-22 13:26:04,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:26:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9276 states. [2020-12-22 13:26:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9276 to 3975. [2020-12-22 13:26:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3975 states. [2020-12-22 13:26:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3975 states to 3975 states and 5950 transitions. [2020-12-22 13:26:05,324 INFO L78 Accepts]: Start accepts. Automaton has 3975 states and 5950 transitions. Word has length 175 [2020-12-22 13:26:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:05,324 INFO L481 AbstractCegarLoop]: Abstraction has 3975 states and 5950 transitions. [2020-12-22 13:26:05,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:26:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3975 states and 5950 transitions. [2020-12-22 13:26:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-12-22 13:26:05,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:05,332 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:05,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 13:26:05,332 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2041382447, now seen corresponding path program 1 times [2020-12-22 13:26:05,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:05,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56919833] [2020-12-22 13:26:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:26:06,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56919833] [2020-12-22 13:26:06,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:26:06,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 13:26:06,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277070381] [2020-12-22 13:26:06,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:26:06,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:26:06,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:26:06,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:26:06,052 INFO L87 Difference]: Start difference. First operand 3975 states and 5950 transitions. Second operand 6 states. [2020-12-22 13:26:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:07,062 INFO L93 Difference]: Finished difference Result 11602 states and 17405 transitions. [2020-12-22 13:26:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:26:07,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 177 [2020-12-22 13:26:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:07,074 INFO L225 Difference]: With dead ends: 11602 [2020-12-22 13:26:07,074 INFO L226 Difference]: Without dead ends: 7734 [2020-12-22 13:26:07,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:26:07,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2020-12-22 13:26:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 3991. [2020-12-22 13:26:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3991 states. [2020-12-22 13:26:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3991 states to 3991 states and 5966 transitions. [2020-12-22 13:26:07,438 INFO L78 Accepts]: Start accepts. Automaton has 3991 states and 5966 transitions. Word has length 177 [2020-12-22 13:26:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:07,438 INFO L481 AbstractCegarLoop]: Abstraction has 3991 states and 5966 transitions. [2020-12-22 13:26:07,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:26:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3991 states and 5966 transitions. [2020-12-22 13:26:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-12-22 13:26:07,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:07,446 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:07,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 13:26:07,446 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:07,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1369721333, now seen corresponding path program 1 times [2020-12-22 13:26:07,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:07,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310527759] [2020-12-22 13:26:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:26:08,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310527759] [2020-12-22 13:26:08,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:26:08,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:26:08,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080519753] [2020-12-22 13:26:08,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:26:08,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:26:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:26:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:26:08,014 INFO L87 Difference]: Start difference. First operand 3991 states and 5966 transitions. Second operand 5 states. [2020-12-22 13:26:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:09,063 INFO L93 Difference]: Finished difference Result 13612 states and 20403 transitions. [2020-12-22 13:26:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:26:09,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-12-22 13:26:09,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:09,077 INFO L225 Difference]: With dead ends: 13612 [2020-12-22 13:26:09,077 INFO L226 Difference]: Without dead ends: 9728 [2020-12-22 13:26:09,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:26:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9728 states. [2020-12-22 13:26:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9728 to 4003. [2020-12-22 13:26:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4003 states. [2020-12-22 13:26:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 5978 transitions. [2020-12-22 13:26:09,379 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 5978 transitions. Word has length 179 [2020-12-22 13:26:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:09,379 INFO L481 AbstractCegarLoop]: Abstraction has 4003 states and 5978 transitions. [2020-12-22 13:26:09,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:26:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 5978 transitions. [2020-12-22 13:26:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-22 13:26:09,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:09,385 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:09,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 13:26:09,385 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:09,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1328550737, now seen corresponding path program 1 times [2020-12-22 13:26:09,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:09,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569035216] [2020-12-22 13:26:09,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-22 13:26:12,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569035216] [2020-12-22 13:26:12,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:26:12,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:26:12,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168416766] [2020-12-22 13:26:12,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:26:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:26:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:26:12,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:26:12,795 INFO L87 Difference]: Start difference. First operand 4003 states and 5978 transitions. Second operand 5 states. [2020-12-22 13:26:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:15,548 INFO L93 Difference]: Finished difference Result 11213 states and 16768 transitions. [2020-12-22 13:26:15,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:26:15,549 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2020-12-22 13:26:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:15,557 INFO L225 Difference]: With dead ends: 11213 [2020-12-22 13:26:15,557 INFO L226 Difference]: Without dead ends: 7317 [2020-12-22 13:26:15,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:26:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7317 states. [2020-12-22 13:26:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7317 to 4003. [2020-12-22 13:26:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4003 states. [2020-12-22 13:26:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 5978 transitions. [2020-12-22 13:26:15,965 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 5978 transitions. Word has length 181 [2020-12-22 13:26:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:15,965 INFO L481 AbstractCegarLoop]: Abstraction has 4003 states and 5978 transitions. [2020-12-22 13:26:15,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:26:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 5978 transitions. [2020-12-22 13:26:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-22 13:26:15,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:15,972 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:15,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 13:26:15,972 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:15,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:15,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1785084685, now seen corresponding path program 1 times [2020-12-22 13:26:15,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:15,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68254746] [2020-12-22 13:26:15,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:26:19,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68254746] [2020-12-22 13:26:19,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:26:19,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:26:19,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951147244] [2020-12-22 13:26:19,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:26:19,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:26:19,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:26:19,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:26:19,249 INFO L87 Difference]: Start difference. First operand 4003 states and 5978 transitions. Second operand 3 states. [2020-12-22 13:26:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:19,601 INFO L93 Difference]: Finished difference Result 8010 states and 11964 transitions. [2020-12-22 13:26:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:26:19,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 183 [2020-12-22 13:26:19,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:19,608 INFO L225 Difference]: With dead ends: 8010 [2020-12-22 13:26:19,608 INFO L226 Difference]: Without dead ends: 4114 [2020-12-22 13:26:19,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 2 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 13:26:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2020-12-22 13:26:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 4003. [2020-12-22 13:26:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4003 states. [2020-12-22 13:26:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 5974 transitions. [2020-12-22 13:26:19,851 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 5974 transitions. Word has length 183 [2020-12-22 13:26:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:19,851 INFO L481 AbstractCegarLoop]: Abstraction has 4003 states and 5974 transitions. [2020-12-22 13:26:19,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:26:19,852 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 5974 transitions. [2020-12-22 13:26:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-22 13:26:19,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:19,856 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:19,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 13:26:19,857 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 547807168, now seen corresponding path program 1 times [2020-12-22 13:26:19,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:19,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460679098] [2020-12-22 13:26:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:26:22,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460679098] [2020-12-22 13:26:22,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:26:22,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 13:26:22,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445813417] [2020-12-22 13:26:22,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:26:22,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:26:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:26:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:26:22,840 INFO L87 Difference]: Start difference. First operand 4003 states and 5974 transitions. Second operand 10 states. [2020-12-22 13:26:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:25,400 INFO L93 Difference]: Finished difference Result 13436 states and 20096 transitions. [2020-12-22 13:26:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 13:26:25,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 184 [2020-12-22 13:26:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:25,413 INFO L225 Difference]: With dead ends: 13436 [2020-12-22 13:26:25,413 INFO L226 Difference]: Without dead ends: 9540 [2020-12-22 13:26:25,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-22 13:26:25,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9540 states. [2020-12-22 13:26:25,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9540 to 4027. [2020-12-22 13:26:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4027 states. [2020-12-22 13:26:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4027 states to 4027 states and 5990 transitions. [2020-12-22 13:26:25,899 INFO L78 Accepts]: Start accepts. Automaton has 4027 states and 5990 transitions. Word has length 184 [2020-12-22 13:26:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:25,900 INFO L481 AbstractCegarLoop]: Abstraction has 4027 states and 5990 transitions. [2020-12-22 13:26:25,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:26:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4027 states and 5990 transitions. [2020-12-22 13:26:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-22 13:26:25,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:25,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:26:25,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 13:26:25,906 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:25,908 INFO L82 PathProgramCache]: Analyzing trace with hash 769204907, now seen corresponding path program 1 times [2020-12-22 13:26:25,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:25,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522308284] [2020-12-22 13:26:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:38,953 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-12-22 13:26:39,098 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-12-22 13:26:39,243 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-12-22 13:26:39,402 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-12-22 13:26:39,563 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-12-22 13:26:39,725 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-12-22 13:26:39,905 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-12-22 13:26:40,093 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-12-22 13:26:40,284 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-12-22 13:26:40,490 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 13:26:40,831 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-12-22 13:26:41,084 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2020-12-22 13:26:41,348 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2020-12-22 13:26:41,803 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2020-12-22 13:26:42,147 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-12-22 13:26:42,472 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-12-22 13:26:43,567 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 13:26:43,915 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 13:26:44,304 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 13:26:44,714 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 13:26:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 13:26:46,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522308284] [2020-12-22 13:26:46,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687513358] [2020-12-22 13:26:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true