/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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:16:08,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:16:08,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:16:08,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:16:08,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:16:08,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:16:08,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:16:08,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:16:08,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:16:08,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:16:08,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:16:08,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:16:08,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:16:08,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:16:08,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:16:08,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:16:08,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:16:08,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:16:08,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:16:08,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:16:08,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:16:08,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:16:08,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:16:08,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:16:08,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:16:08,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:16:08,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:16:08,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:16:08,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:16:08,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:16:08,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:16:08,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:16:08,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:16:08,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:16:08,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:16:08,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:16:08,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:16:08,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:16:08,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:16:08,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:16:08,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:16:08,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:16:08,797 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:16:08,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:16:08,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:16:08,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:16:08,800 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:16:08,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:16:08,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:16:08,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:16:08,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:16:08,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:16:08,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:16:08,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:16:08,801 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:16:08,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:16:08,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:16:08,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:16:08,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:16:08,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:16:08,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:16:08,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:16:08,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:16:08,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:16:08,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:16:08,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:16:08,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:16:08,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:16:09,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:16:09,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:16:09,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:16:09,218 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:16:09,219 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:16:09,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2020-12-22 13:16:09,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619469362/1680a2909fc8404c9187de8d18b2e839/FLAG9799dca4d [2020-12-22 13:16:10,415 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:16:10,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2020-12-22 13:16:10,476 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619469362/1680a2909fc8404c9187de8d18b2e839/FLAG9799dca4d [2020-12-22 13:16:10,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619469362/1680a2909fc8404c9187de8d18b2e839 [2020-12-22 13:16:10,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:16:10,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:16:10,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:16:10,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:16:10,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:16:10,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:16:10" (1/1) ... [2020-12-22 13:16:10,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7641c40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:10, skipping insertion in model container [2020-12-22 13:16:10,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:16:10" (1/1) ... [2020-12-22 13:16:10,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:16:11,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:16:12,032 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2020-12-22 13:16:13,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:16:13,118 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:16:13,309 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2020-12-22 13:16:13,543 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:16:13,849 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:16:13,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13 WrapperNode [2020-12-22 13:16:13,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:16:13,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:16:13,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:16:13,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:16:13,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:13,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:14,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:16:14,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:16:14,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:16:14,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:16:14,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:14,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:14,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:14,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:14,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:14,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:14,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (1/1) ... [2020-12-22 13:16:14,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:16:14,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:16:14,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:16:14,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:16:14,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (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 13:16:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:16:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:16:14,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:16:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:16:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:16:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:16:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:16:14,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:16:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:16:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:16:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:16:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:16:14,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:16:14,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:16:14,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:16:22,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:16:22,489 INFO L299 CfgBuilder]: Removed 1046 assume(true) statements. [2020-12-22 13:16:22,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:16:22 BoogieIcfgContainer [2020-12-22 13:16:22,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:16:22,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:16:22,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:16:22,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:16:22,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:16:10" (1/3) ... [2020-12-22 13:16:22,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b823e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:16:22, skipping insertion in model container [2020-12-22 13:16:22,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:16:13" (2/3) ... [2020-12-22 13:16:22,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b823e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:16:22, skipping insertion in model container [2020-12-22 13:16:22,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:16:22" (3/3) ... [2020-12-22 13:16:22,501 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2020-12-22 13:16:22,508 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:16:22,524 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:16:22,546 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:16:22,583 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:16:22,583 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:16:22,584 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:16:22,584 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:16:22,584 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:16:22,584 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:16:22,584 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:16:22,584 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:16:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states. [2020-12-22 13:16:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 13:16:22,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:22,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:22,691 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:22,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:22,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1648518912, now seen corresponding path program 1 times [2020-12-22 13:16:22,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:22,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465776174] [2020-12-22 13:16:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:23,372 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 13:16:23,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465776174] [2020-12-22 13:16:23,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:23,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:23,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994612674] [2020-12-22 13:16:23,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:23,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:23,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:23,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:23,401 INFO L87 Difference]: Start difference. First operand 914 states. Second operand 3 states. [2020-12-22 13:16:23,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:23,587 INFO L93 Difference]: Finished difference Result 1824 states and 2517 transitions. [2020-12-22 13:16:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:23,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-12-22 13:16:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:23,620 INFO L225 Difference]: With dead ends: 1824 [2020-12-22 13:16:23,620 INFO L226 Difference]: Without dead ends: 906 [2020-12-22 13:16:23,632 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 13:16:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-12-22 13:16:23,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 906. [2020-12-22 13:16:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 906 states. [2020-12-22 13:16:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1200 transitions. [2020-12-22 13:16:23,764 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1200 transitions. Word has length 29 [2020-12-22 13:16:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:23,764 INFO L481 AbstractCegarLoop]: Abstraction has 906 states and 1200 transitions. [2020-12-22 13:16:23,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1200 transitions. [2020-12-22 13:16:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 13:16:23,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:23,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:23,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:16:23,775 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:23,776 INFO L82 PathProgramCache]: Analyzing trace with hash -879500223, now seen corresponding path program 1 times [2020-12-22 13:16:23,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:23,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319336178] [2020-12-22 13:16:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:24,037 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 13:16:24,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319336178] [2020-12-22 13:16:24,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:24,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:24,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600674686] [2020-12-22 13:16:24,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:24,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:24,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:24,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:24,042 INFO L87 Difference]: Start difference. First operand 906 states and 1200 transitions. Second operand 3 states. [2020-12-22 13:16:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:25,275 INFO L93 Difference]: Finished difference Result 2624 states and 3490 transitions. [2020-12-22 13:16:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:25,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-12-22 13:16:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:25,285 INFO L225 Difference]: With dead ends: 2624 [2020-12-22 13:16:25,285 INFO L226 Difference]: Without dead ends: 1754 [2020-12-22 13:16:25,288 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 13:16:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2020-12-22 13:16:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1754. [2020-12-22 13:16:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1754 states. [2020-12-22 13:16:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2330 transitions. [2020-12-22 13:16:25,352 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2330 transitions. Word has length 30 [2020-12-22 13:16:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:25,353 INFO L481 AbstractCegarLoop]: Abstraction has 1754 states and 2330 transitions. [2020-12-22 13:16:25,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:25,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2330 transitions. [2020-12-22 13:16:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 13:16:25,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:25,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:25,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:16:25,358 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1110944964, now seen corresponding path program 1 times [2020-12-22 13:16:25,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:25,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362640779] [2020-12-22 13:16:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:25,595 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 13:16:25,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362640779] [2020-12-22 13:16:25,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:25,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:16:25,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059620046] [2020-12-22 13:16:25,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:16:25,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:25,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:16:25,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:25,612 INFO L87 Difference]: Start difference. First operand 1754 states and 2330 transitions. Second operand 5 states. [2020-12-22 13:16:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:26,057 INFO L93 Difference]: Finished difference Result 5188 states and 6903 transitions. [2020-12-22 13:16:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:26,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 13:16:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:26,075 INFO L225 Difference]: With dead ends: 5188 [2020-12-22 13:16:26,076 INFO L226 Difference]: Without dead ends: 3465 [2020-12-22 13:16:26,080 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 13:16:26,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2020-12-22 13:16:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 3417. [2020-12-22 13:16:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3417 states. [2020-12-22 13:16:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 4546 transitions. [2020-12-22 13:16:26,196 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 4546 transitions. Word has length 37 [2020-12-22 13:16:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:26,197 INFO L481 AbstractCegarLoop]: Abstraction has 3417 states and 4546 transitions. [2020-12-22 13:16:26,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:16:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 4546 transitions. [2020-12-22 13:16:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 13:16:26,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:26,207 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:16:26,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:16:26,207 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:26,208 INFO L82 PathProgramCache]: Analyzing trace with hash -143887177, now seen corresponding path program 1 times [2020-12-22 13:16:26,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:26,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95381476] [2020-12-22 13:16:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:16:26,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95381476] [2020-12-22 13:16:26,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:26,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:26,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351324060] [2020-12-22 13:16:26,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:26,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:26,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:26,452 INFO L87 Difference]: Start difference. First operand 3417 states and 4546 transitions. Second operand 3 states. [2020-12-22 13:16:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:26,804 INFO L93 Difference]: Finished difference Result 8838 states and 11753 transitions. [2020-12-22 13:16:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:26,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 13:16:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:26,832 INFO L225 Difference]: With dead ends: 8838 [2020-12-22 13:16:26,832 INFO L226 Difference]: Without dead ends: 5457 [2020-12-22 13:16:26,841 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 13:16:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5457 states. [2020-12-22 13:16:27,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5457 to 5447. [2020-12-22 13:16:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5447 states. [2020-12-22 13:16:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5447 states to 5447 states and 7237 transitions. [2020-12-22 13:16:27,051 INFO L78 Accepts]: Start accepts. Automaton has 5447 states and 7237 transitions. Word has length 75 [2020-12-22 13:16:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:27,053 INFO L481 AbstractCegarLoop]: Abstraction has 5447 states and 7237 transitions. [2020-12-22 13:16:27,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 5447 states and 7237 transitions. [2020-12-22 13:16:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 13:16:27,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:27,064 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:16:27,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:16:27,064 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1054707441, now seen corresponding path program 1 times [2020-12-22 13:16:27,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:27,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60831615] [2020-12-22 13:16:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:16:27,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60831615] [2020-12-22 13:16:27,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:27,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:27,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728406853] [2020-12-22 13:16:27,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:27,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:27,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:27,279 INFO L87 Difference]: Start difference. First operand 5447 states and 7237 transitions. Second operand 3 states. [2020-12-22 13:16:28,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:28,399 INFO L93 Difference]: Finished difference Result 12950 states and 17231 transitions. [2020-12-22 13:16:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:28,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 85 [2020-12-22 13:16:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:28,440 INFO L225 Difference]: With dead ends: 12950 [2020-12-22 13:16:28,440 INFO L226 Difference]: Without dead ends: 7539 [2020-12-22 13:16:28,451 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 13:16:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7539 states. [2020-12-22 13:16:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7539 to 7529. [2020-12-22 13:16:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7529 states. [2020-12-22 13:16:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10000 transitions. [2020-12-22 13:16:28,849 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10000 transitions. Word has length 85 [2020-12-22 13:16:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:28,850 INFO L481 AbstractCegarLoop]: Abstraction has 7529 states and 10000 transitions. [2020-12-22 13:16:28,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10000 transitions. [2020-12-22 13:16:28,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 13:16:28,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:28,864 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:28,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:16:28,864 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1926446328, now seen corresponding path program 1 times [2020-12-22 13:16:28,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:28,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635404923] [2020-12-22 13:16:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:29,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635404923] [2020-12-22 13:16:29,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:29,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:16:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082222929] [2020-12-22 13:16:29,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:16:29,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:16:29,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:16:29,096 INFO L87 Difference]: Start difference. First operand 7529 states and 10000 transitions. Second operand 4 states. [2020-12-22 13:16:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:30,407 INFO L93 Difference]: Finished difference Result 17643 states and 23406 transitions. [2020-12-22 13:16:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:30,408 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-12-22 13:16:30,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:30,478 INFO L225 Difference]: With dead ends: 17643 [2020-12-22 13:16:30,478 INFO L226 Difference]: Without dead ends: 10150 [2020-12-22 13:16:30,499 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 13:16:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10150 states. [2020-12-22 13:16:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10150 to 7537. [2020-12-22 13:16:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7537 states. [2020-12-22 13:16:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7537 states to 7537 states and 10008 transitions. [2020-12-22 13:16:30,869 INFO L78 Accepts]: Start accepts. Automaton has 7537 states and 10008 transitions. Word has length 97 [2020-12-22 13:16:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:30,873 INFO L481 AbstractCegarLoop]: Abstraction has 7537 states and 10008 transitions. [2020-12-22 13:16:30,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:16:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 7537 states and 10008 transitions. [2020-12-22 13:16:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 13:16:30,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:30,901 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:16:30,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:16:30,901 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:30,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:30,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1301228354, now seen corresponding path program 1 times [2020-12-22 13:16:30,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:30,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298287131] [2020-12-22 13:16:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:16:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298287131] [2020-12-22 13:16:31,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:31,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:16:31,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484230736] [2020-12-22 13:16:31,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:16:31,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:31,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:16:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:16:31,118 INFO L87 Difference]: Start difference. First operand 7537 states and 10008 transitions. Second operand 4 states. [2020-12-22 13:16:32,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:32,072 INFO L93 Difference]: Finished difference Result 31317 states and 41616 transitions. [2020-12-22 13:16:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:32,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 13:16:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:32,138 INFO L225 Difference]: With dead ends: 31317 [2020-12-22 13:16:32,139 INFO L226 Difference]: Without dead ends: 23816 [2020-12-22 13:16:32,158 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 13:16:32,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23816 states. [2020-12-22 13:16:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23816 to 7545. [2020-12-22 13:16:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7545 states. [2020-12-22 13:16:32,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 10016 transitions. [2020-12-22 13:16:32,746 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 10016 transitions. Word has length 115 [2020-12-22 13:16:32,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:32,747 INFO L481 AbstractCegarLoop]: Abstraction has 7545 states and 10016 transitions. [2020-12-22 13:16:32,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:16:32,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 10016 transitions. [2020-12-22 13:16:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 13:16:32,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:32,758 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:32,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:16:32,759 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1103368020, now seen corresponding path program 1 times [2020-12-22 13:16:32,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:32,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075648096] [2020-12-22 13:16:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:32,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075648096] [2020-12-22 13:16:32,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:32,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:16:32,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235734907] [2020-12-22 13:16:32,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:16:32,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:32,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:16:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:16:32,941 INFO L87 Difference]: Start difference. First operand 7545 states and 10016 transitions. Second operand 4 states. [2020-12-22 13:16:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:34,107 INFO L93 Difference]: Finished difference Result 17687 states and 23450 transitions. [2020-12-22 13:16:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:34,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2020-12-22 13:16:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:34,132 INFO L225 Difference]: With dead ends: 17687 [2020-12-22 13:16:34,132 INFO L226 Difference]: Without dead ends: 10178 [2020-12-22 13:16:34,145 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 13:16:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10178 states. [2020-12-22 13:16:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10178 to 7545. [2020-12-22 13:16:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7545 states. [2020-12-22 13:16:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 10016 transitions. [2020-12-22 13:16:34,603 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 10016 transitions. Word has length 116 [2020-12-22 13:16:34,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:34,605 INFO L481 AbstractCegarLoop]: Abstraction has 7545 states and 10016 transitions. [2020-12-22 13:16:34,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:16:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 10016 transitions. [2020-12-22 13:16:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-12-22 13:16:34,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:34,618 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:16:34,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:16:34,619 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2013466006, now seen corresponding path program 1 times [2020-12-22 13:16:34,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:34,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68311812] [2020-12-22 13:16:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:16:34,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68311812] [2020-12-22 13:16:34,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:34,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:16:34,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831999015] [2020-12-22 13:16:34,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:16:34,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:16:34,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:16:34,857 INFO L87 Difference]: Start difference. First operand 7545 states and 10016 transitions. Second operand 4 states. [2020-12-22 13:16:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:36,426 INFO L93 Difference]: Finished difference Result 37375 states and 49633 transitions. [2020-12-22 13:16:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:36,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2020-12-22 13:16:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:36,503 INFO L225 Difference]: With dead ends: 37375 [2020-12-22 13:16:36,503 INFO L226 Difference]: Without dead ends: 29866 [2020-12-22 13:16:36,523 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 13:16:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29866 states. [2020-12-22 13:16:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29866 to 7553. [2020-12-22 13:16:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7553 states. [2020-12-22 13:16:37,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7553 states to 7553 states and 10024 transitions. [2020-12-22 13:16:37,122 INFO L78 Accepts]: Start accepts. Automaton has 7553 states and 10024 transitions. Word has length 123 [2020-12-22 13:16:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:37,123 INFO L481 AbstractCegarLoop]: Abstraction has 7553 states and 10024 transitions. [2020-12-22 13:16:37,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:16:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7553 states and 10024 transitions. [2020-12-22 13:16:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 13:16:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:37,133 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:16:37,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:16:37,196 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1210492518, now seen corresponding path program 1 times [2020-12-22 13:16:37,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:37,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80501302] [2020-12-22 13:16:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:16:37,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80501302] [2020-12-22 13:16:37,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643904240] [2020-12-22 13:16:37,523 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 13:16:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2508 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:16:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:16:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:16:38,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:16:38,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:16:38,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987056955] [2020-12-22 13:16:38,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:16:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:16:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:16:38,733 INFO L87 Difference]: Start difference. First operand 7553 states and 10024 transitions. Second operand 6 states. [2020-12-22 13:16:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:41,053 INFO L93 Difference]: Finished difference Result 25729 states and 34121 transitions. [2020-12-22 13:16:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:16:41,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-12-22 13:16:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:41,091 INFO L225 Difference]: With dead ends: 25729 [2020-12-22 13:16:41,091 INFO L226 Difference]: Without dead ends: 18211 [2020-12-22 13:16:41,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:16:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18211 states. [2020-12-22 13:16:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18211 to 17848. [2020-12-22 13:16:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17848 states. [2020-12-22 13:16:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17848 states to 17848 states and 23686 transitions. [2020-12-22 13:16:42,376 INFO L78 Accepts]: Start accepts. Automaton has 17848 states and 23686 transitions. Word has length 126 [2020-12-22 13:16:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:42,376 INFO L481 AbstractCegarLoop]: Abstraction has 17848 states and 23686 transitions. [2020-12-22 13:16:42,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:16:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 17848 states and 23686 transitions. [2020-12-22 13:16:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 13:16:42,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:42,409 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:16:42,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 13:16:42,623 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:42,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1658246585, now seen corresponding path program 1 times [2020-12-22 13:16:42,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:42,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753412070] [2020-12-22 13:16:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:42,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753412070] [2020-12-22 13:16:42,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:42,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:16:42,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728796957] [2020-12-22 13:16:42,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:16:42,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:42,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:16:42,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:16:42,869 INFO L87 Difference]: Start difference. First operand 17848 states and 23686 transitions. Second operand 4 states. [2020-12-22 13:16:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:45,204 INFO L93 Difference]: Finished difference Result 44976 states and 59594 transitions. [2020-12-22 13:16:45,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:16:45,205 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 127 [2020-12-22 13:16:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:45,252 INFO L225 Difference]: With dead ends: 44976 [2020-12-22 13:16:45,252 INFO L226 Difference]: Without dead ends: 27671 [2020-12-22 13:16:45,280 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 13:16:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27671 states. [2020-12-22 13:16:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27671 to 17840. [2020-12-22 13:16:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17840 states. [2020-12-22 13:16:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 23666 transitions. [2020-12-22 13:16:46,645 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 23666 transitions. Word has length 127 [2020-12-22 13:16:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:46,645 INFO L481 AbstractCegarLoop]: Abstraction has 17840 states and 23666 transitions. [2020-12-22 13:16:46,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:16:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 23666 transitions. [2020-12-22 13:16:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 13:16:46,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:46,661 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:46,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:16:46,662 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2129995090, now seen corresponding path program 1 times [2020-12-22 13:16:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:46,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364217493] [2020-12-22 13:16:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:46,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364217493] [2020-12-22 13:16:46,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:46,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:46,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322719267] [2020-12-22 13:16:46,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:46,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:46,809 INFO L87 Difference]: Start difference. First operand 17840 states and 23666 transitions. Second operand 3 states. [2020-12-22 13:16:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:48,732 INFO L93 Difference]: Finished difference Result 27568 states and 36576 transitions. [2020-12-22 13:16:48,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:48,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2020-12-22 13:16:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:48,753 INFO L225 Difference]: With dead ends: 27568 [2020-12-22 13:16:48,754 INFO L226 Difference]: Without dead ends: 10268 [2020-12-22 13:16:48,776 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 13:16:48,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2020-12-22 13:16:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 10261. [2020-12-22 13:16:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10261 states. [2020-12-22 13:16:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10261 states to 10261 states and 13609 transitions. [2020-12-22 13:16:49,622 INFO L78 Accepts]: Start accepts. Automaton has 10261 states and 13609 transitions. Word has length 132 [2020-12-22 13:16:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:49,622 INFO L481 AbstractCegarLoop]: Abstraction has 10261 states and 13609 transitions. [2020-12-22 13:16:49,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:49,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10261 states and 13609 transitions. [2020-12-22 13:16:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 13:16:49,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:49,634 INFO L422 BasicCegarLoop]: trace histogram [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, 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 13:16:49,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:16:49,635 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:49,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1346098356, now seen corresponding path program 1 times [2020-12-22 13:16:49,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:49,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227525898] [2020-12-22 13:16:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:16:49,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227525898] [2020-12-22 13:16:49,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:49,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:49,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142733656] [2020-12-22 13:16:49,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:49,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:49,816 INFO L87 Difference]: Start difference. First operand 10261 states and 13609 transitions. Second operand 3 states. [2020-12-22 13:16:51,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:51,094 INFO L93 Difference]: Finished difference Result 27665 states and 36711 transitions. [2020-12-22 13:16:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:51,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 13:16:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:51,119 INFO L225 Difference]: With dead ends: 27665 [2020-12-22 13:16:51,120 INFO L226 Difference]: Without dead ends: 18963 [2020-12-22 13:16:51,133 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 13:16:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18963 states. [2020-12-22 13:16:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18963 to 10267. [2020-12-22 13:16:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10267 states. [2020-12-22 13:16:52,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10267 states to 10267 states and 13615 transitions. [2020-12-22 13:16:52,174 INFO L78 Accepts]: Start accepts. Automaton has 10267 states and 13615 transitions. Word has length 134 [2020-12-22 13:16:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:52,174 INFO L481 AbstractCegarLoop]: Abstraction has 10267 states and 13615 transitions. [2020-12-22 13:16:52,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 10267 states and 13615 transitions. [2020-12-22 13:16:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 13:16:52,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:52,183 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:52,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 13:16:52,184 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash 484158904, now seen corresponding path program 1 times [2020-12-22 13:16:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:52,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886039262] [2020-12-22 13:16:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:52,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886039262] [2020-12-22 13:16:52,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:52,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:52,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270994914] [2020-12-22 13:16:52,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:52,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:52,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:52,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:52,453 INFO L87 Difference]: Start difference. First operand 10267 states and 13615 transitions. Second operand 3 states. [2020-12-22 13:16:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:53,727 INFO L93 Difference]: Finished difference Result 18926 states and 25111 transitions. [2020-12-22 13:16:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:53,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 13:16:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:53,739 INFO L225 Difference]: With dead ends: 18926 [2020-12-22 13:16:53,739 INFO L226 Difference]: Without dead ends: 9203 [2020-12-22 13:16:53,749 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 13:16:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9203 states. [2020-12-22 13:16:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9203 to 9203. [2020-12-22 13:16:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9203 states. [2020-12-22 13:16:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9203 states to 9203 states and 12181 transitions. [2020-12-22 13:16:54,342 INFO L78 Accepts]: Start accepts. Automaton has 9203 states and 12181 transitions. Word has length 134 [2020-12-22 13:16:54,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:54,343 INFO L481 AbstractCegarLoop]: Abstraction has 9203 states and 12181 transitions. [2020-12-22 13:16:54,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:54,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9203 states and 12181 transitions. [2020-12-22 13:16:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 13:16:54,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:54,353 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 13:16:54,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:16:54,353 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash 833103085, now seen corresponding path program 1 times [2020-12-22 13:16:54,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:54,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131738573] [2020-12-22 13:16:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:16:54,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131738573] [2020-12-22 13:16:54,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926927985] [2020-12-22 13:16:54,529 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 13:16:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:55,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2581 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:16:55,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:16:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:16:55,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:16:55,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:16:55,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937351153] [2020-12-22 13:16:55,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:55,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:55,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:55,679 INFO L87 Difference]: Start difference. First operand 9203 states and 12181 transitions. Second operand 3 states. [2020-12-22 13:16:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:56,972 INFO L93 Difference]: Finished difference Result 20993 states and 27802 transitions. [2020-12-22 13:16:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:56,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 13:16:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:56,991 INFO L225 Difference]: With dead ends: 20993 [2020-12-22 13:16:56,992 INFO L226 Difference]: Without dead ends: 16666 [2020-12-22 13:16:57,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:16:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16666 states. [2020-12-22 13:16:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16666 to 9221. [2020-12-22 13:16:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9221 states. [2020-12-22 13:16:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9221 states to 9221 states and 12199 transitions. [2020-12-22 13:16:57,584 INFO L78 Accepts]: Start accepts. Automaton has 9221 states and 12199 transitions. Word has length 138 [2020-12-22 13:16:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:57,584 INFO L481 AbstractCegarLoop]: Abstraction has 9221 states and 12199 transitions. [2020-12-22 13:16:57,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 9221 states and 12199 transitions. [2020-12-22 13:16:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 13:16:57,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:57,591 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 13:16:57,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 13:16:57,793 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:57,794 INFO L82 PathProgramCache]: Analyzing trace with hash 152230531, now seen corresponding path program 1 times [2020-12-22 13:16:57,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:57,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420036327] [2020-12-22 13:16:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:57,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420036327] [2020-12-22 13:16:57,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:57,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:57,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781109280] [2020-12-22 13:16:57,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:57,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:57,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:57,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:57,969 INFO L87 Difference]: Start difference. First operand 9221 states and 12199 transitions. Second operand 3 states. [2020-12-22 13:16:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:16:58,689 INFO L93 Difference]: Finished difference Result 16965 states and 22471 transitions. [2020-12-22 13:16:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:16:58,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-22 13:16:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:16:58,698 INFO L225 Difference]: With dead ends: 16965 [2020-12-22 13:16:58,699 INFO L226 Difference]: Without dead ends: 9351 [2020-12-22 13:16:58,707 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 13:16:58,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9351 states. [2020-12-22 13:16:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9351 to 9231. [2020-12-22 13:16:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9231 states. [2020-12-22 13:16:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9231 states to 9231 states and 12209 transitions. [2020-12-22 13:16:59,258 INFO L78 Accepts]: Start accepts. Automaton has 9231 states and 12209 transitions. Word has length 138 [2020-12-22 13:16:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:16:59,258 INFO L481 AbstractCegarLoop]: Abstraction has 9231 states and 12209 transitions. [2020-12-22 13:16:59,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:16:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 9231 states and 12209 transitions. [2020-12-22 13:16:59,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 13:16:59,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:16:59,265 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:59,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 13:16:59,265 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:16:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:16:59,266 INFO L82 PathProgramCache]: Analyzing trace with hash 883814681, now seen corresponding path program 1 times [2020-12-22 13:16:59,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:16:59,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831448636] [2020-12-22 13:16:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:16:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:16:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:16:59,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831448636] [2020-12-22 13:16:59,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:16:59,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:16:59,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946411398] [2020-12-22 13:16:59,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:16:59,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:16:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:16:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:16:59,475 INFO L87 Difference]: Start difference. First operand 9231 states and 12209 transitions. Second operand 3 states. [2020-12-22 13:17:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:01,598 INFO L93 Difference]: Finished difference Result 17640 states and 23387 transitions. [2020-12-22 13:17:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:01,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-22 13:17:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:01,614 INFO L225 Difference]: With dead ends: 17640 [2020-12-22 13:17:01,614 INFO L226 Difference]: Without dead ends: 11314 [2020-12-22 13:17:01,624 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 13:17:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11314 states. [2020-12-22 13:17:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11314 to 11313. [2020-12-22 13:17:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11313 states. [2020-12-22 13:17:02,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11313 states to 11313 states and 14972 transitions. [2020-12-22 13:17:02,378 INFO L78 Accepts]: Start accepts. Automaton has 11313 states and 14972 transitions. Word has length 139 [2020-12-22 13:17:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:02,378 INFO L481 AbstractCegarLoop]: Abstraction has 11313 states and 14972 transitions. [2020-12-22 13:17:02,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 11313 states and 14972 transitions. [2020-12-22 13:17:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 13:17:02,385 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:02,385 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:02,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 13:17:02,385 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:02,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash 603506531, now seen corresponding path program 1 times [2020-12-22 13:17:02,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:02,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606341334] [2020-12-22 13:17:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 13:17:02,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606341334] [2020-12-22 13:17:02,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425480474] [2020-12-22 13:17:02,677 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 13:17:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:03,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:17:03,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:17:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 13:17:03,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:17:03,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:17:03,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666294216] [2020-12-22 13:17:03,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:17:03,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:17:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:17:03,753 INFO L87 Difference]: Start difference. First operand 11313 states and 14972 transitions. Second operand 8 states. [2020-12-22 13:17:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:04,496 INFO L93 Difference]: Finished difference Result 22591 states and 29903 transitions. [2020-12-22 13:17:04,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:17:04,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2020-12-22 13:17:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:04,511 INFO L225 Difference]: With dead ends: 22591 [2020-12-22 13:17:04,511 INFO L226 Difference]: Without dead ends: 11314 [2020-12-22 13:17:04,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:17:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11314 states. [2020-12-22 13:17:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11314 to 11314. [2020-12-22 13:17:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11314 states. [2020-12-22 13:17:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11314 states to 11314 states and 14973 transitions. [2020-12-22 13:17:05,433 INFO L78 Accepts]: Start accepts. Automaton has 11314 states and 14973 transitions. Word has length 139 [2020-12-22 13:17:05,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:05,434 INFO L481 AbstractCegarLoop]: Abstraction has 11314 states and 14973 transitions. [2020-12-22 13:17:05,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:17:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 11314 states and 14973 transitions. [2020-12-22 13:17:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 13:17:05,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:05,441 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:05,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 13:17:05,649 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2137083164, now seen corresponding path program 2 times [2020-12-22 13:17:05,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:05,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694231837] [2020-12-22 13:17:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 13:17:05,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694231837] [2020-12-22 13:17:05,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899131212] [2020-12-22 13:17:05,912 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 13:17:07,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:17:07,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:17:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2627 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:17:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:17:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 13:17:08,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:17:08,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:17:08,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922964355] [2020-12-22 13:17:08,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:17:08,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:17:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:17:08,042 INFO L87 Difference]: Start difference. First operand 11314 states and 14973 transitions. Second operand 10 states. [2020-12-22 13:17:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:08,680 INFO L93 Difference]: Finished difference Result 22592 states and 29904 transitions. [2020-12-22 13:17:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:17:08,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 140 [2020-12-22 13:17:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:08,694 INFO L225 Difference]: With dead ends: 22592 [2020-12-22 13:17:08,694 INFO L226 Difference]: Without dead ends: 11315 [2020-12-22 13:17:08,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:17:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2020-12-22 13:17:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11315. [2020-12-22 13:17:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11315 states. [2020-12-22 13:17:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11315 states to 11315 states and 14974 transitions. [2020-12-22 13:17:09,532 INFO L78 Accepts]: Start accepts. Automaton has 11315 states and 14974 transitions. Word has length 140 [2020-12-22 13:17:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:09,532 INFO L481 AbstractCegarLoop]: Abstraction has 11315 states and 14974 transitions. [2020-12-22 13:17:09,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:17:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 11315 states and 14974 transitions. [2020-12-22 13:17:09,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 13:17:09,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:09,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:09,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:09,746 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1196017789, now seen corresponding path program 3 times [2020-12-22 13:17:09,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:09,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023005925] [2020-12-22 13:17:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:10,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023005925] [2020-12-22 13:17:10,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:10,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:17:10,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247438128] [2020-12-22 13:17:10,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:17:10,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:10,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:17:10,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:10,099 INFO L87 Difference]: Start difference. First operand 11315 states and 14974 transitions. Second operand 5 states. [2020-12-22 13:17:12,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:12,828 INFO L93 Difference]: Finished difference Result 38033 states and 50348 transitions. [2020-12-22 13:17:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:17:12,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2020-12-22 13:17:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:12,860 INFO L225 Difference]: With dead ends: 38033 [2020-12-22 13:17:12,860 INFO L226 Difference]: Without dead ends: 28327 [2020-12-22 13:17:12,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:17:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28327 states. [2020-12-22 13:17:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28327 to 11333. [2020-12-22 13:17:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11333 states. [2020-12-22 13:17:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11333 states to 11333 states and 14992 transitions. [2020-12-22 13:17:13,677 INFO L78 Accepts]: Start accepts. Automaton has 11333 states and 14992 transitions. Word has length 141 [2020-12-22 13:17:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:13,677 INFO L481 AbstractCegarLoop]: Abstraction has 11333 states and 14992 transitions. [2020-12-22 13:17:13,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:17:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 11333 states and 14992 transitions. [2020-12-22 13:17:13,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 13:17:13,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:13,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:13,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 13:17:13,684 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1004647975, now seen corresponding path program 1 times [2020-12-22 13:17:13,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:13,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181199547] [2020-12-22 13:17:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:13,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181199547] [2020-12-22 13:17:13,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:13,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 13:17:13,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747041301] [2020-12-22 13:17:13,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:17:13,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:17:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:17:13,959 INFO L87 Difference]: Start difference. First operand 11333 states and 14992 transitions. Second operand 6 states. [2020-12-22 13:17:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:17,299 INFO L93 Difference]: Finished difference Result 51974 states and 68912 transitions. [2020-12-22 13:17:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:17:17,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2020-12-22 13:17:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:17,345 INFO L225 Difference]: With dead ends: 51974 [2020-12-22 13:17:17,346 INFO L226 Difference]: Without dead ends: 42250 [2020-12-22 13:17:17,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:17:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42250 states. [2020-12-22 13:17:18,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42250 to 11357. [2020-12-22 13:17:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11357 states. [2020-12-22 13:17:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11357 states to 11357 states and 15016 transitions. [2020-12-22 13:17:18,421 INFO L78 Accepts]: Start accepts. Automaton has 11357 states and 15016 transitions. Word has length 143 [2020-12-22 13:17:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:18,421 INFO L481 AbstractCegarLoop]: Abstraction has 11357 states and 15016 transitions. [2020-12-22 13:17:18,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:17:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 11357 states and 15016 transitions. [2020-12-22 13:17:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 13:17:18,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:18,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:18,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 13:17:18,428 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:18,428 INFO L82 PathProgramCache]: Analyzing trace with hash 487847523, now seen corresponding path program 1 times [2020-12-22 13:17:18,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:18,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642983894] [2020-12-22 13:17:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:18,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642983894] [2020-12-22 13:17:18,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:18,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:17:18,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837063051] [2020-12-22 13:17:18,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:17:18,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:18,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:17:18,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:18,704 INFO L87 Difference]: Start difference. First operand 11357 states and 15016 transitions. Second operand 5 states. [2020-12-22 13:17:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:23,497 INFO L93 Difference]: Finished difference Result 51194 states and 67910 transitions. [2020-12-22 13:17:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:17:23,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-12-22 13:17:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:23,547 INFO L225 Difference]: With dead ends: 51194 [2020-12-22 13:17:23,547 INFO L226 Difference]: Without dead ends: 41446 [2020-12-22 13:17:23,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 13:17:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41446 states. [2020-12-22 13:17:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41446 to 11375. [2020-12-22 13:17:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11375 states. [2020-12-22 13:17:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11375 states to 11375 states and 15034 transitions. [2020-12-22 13:17:24,855 INFO L78 Accepts]: Start accepts. Automaton has 11375 states and 15034 transitions. Word has length 145 [2020-12-22 13:17:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:24,856 INFO L481 AbstractCegarLoop]: Abstraction has 11375 states and 15034 transitions. [2020-12-22 13:17:24,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:17:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 11375 states and 15034 transitions. [2020-12-22 13:17:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 13:17:24,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:24,863 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:24,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 13:17:24,864 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:24,864 INFO L82 PathProgramCache]: Analyzing trace with hash -738234497, now seen corresponding path program 1 times [2020-12-22 13:17:24,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:24,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106225137] [2020-12-22 13:17:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:25,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106225137] [2020-12-22 13:17:25,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:25,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:17:25,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193779909] [2020-12-22 13:17:25,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:17:25,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:17:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:25,184 INFO L87 Difference]: Start difference. First operand 11375 states and 15034 transitions. Second operand 5 states. [2020-12-22 13:17:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:30,068 INFO L93 Difference]: Finished difference Result 51212 states and 67922 transitions. [2020-12-22 13:17:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:17:30,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2020-12-22 13:17:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:30,116 INFO L225 Difference]: With dead ends: 51212 [2020-12-22 13:17:30,116 INFO L226 Difference]: Without dead ends: 41446 [2020-12-22 13:17:30,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 13:17:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41446 states. [2020-12-22 13:17:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41446 to 11393. [2020-12-22 13:17:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11393 states. [2020-12-22 13:17:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11393 states to 11393 states and 15052 transitions. [2020-12-22 13:17:31,542 INFO L78 Accepts]: Start accepts. Automaton has 11393 states and 15052 transitions. Word has length 147 [2020-12-22 13:17:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:31,542 INFO L481 AbstractCegarLoop]: Abstraction has 11393 states and 15052 transitions. [2020-12-22 13:17:31,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:17:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 11393 states and 15052 transitions. [2020-12-22 13:17:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 13:17:31,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:31,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:31,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 13:17:31,549 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:31,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:31,550 INFO L82 PathProgramCache]: Analyzing trace with hash -335886789, now seen corresponding path program 1 times [2020-12-22 13:17:31,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:31,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241129793] [2020-12-22 13:17:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:31,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241129793] [2020-12-22 13:17:31,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:31,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:17:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768323240] [2020-12-22 13:17:31,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:17:31,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:17:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:17:31,815 INFO L87 Difference]: Start difference. First operand 11393 states and 15052 transitions. Second operand 5 states. [2020-12-22 13:17:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:37,031 INFO L93 Difference]: Finished difference Result 50742 states and 67302 transitions. [2020-12-22 13:17:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:17:37,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2020-12-22 13:17:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:37,077 INFO L225 Difference]: With dead ends: 50742 [2020-12-22 13:17:37,077 INFO L226 Difference]: Without dead ends: 40958 [2020-12-22 13:17:37,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 13:17:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40958 states. [2020-12-22 13:17:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40958 to 11411. [2020-12-22 13:17:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11411 states. [2020-12-22 13:17:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11411 states to 11411 states and 15070 transitions. [2020-12-22 13:17:38,592 INFO L78 Accepts]: Start accepts. Automaton has 11411 states and 15070 transitions. Word has length 149 [2020-12-22 13:17:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:38,592 INFO L481 AbstractCegarLoop]: Abstraction has 11411 states and 15070 transitions. [2020-12-22 13:17:38,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:17:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 11411 states and 15070 transitions. [2020-12-22 13:17:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 13:17:38,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:38,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:38,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 13:17:38,599 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:38,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1445775959, now seen corresponding path program 1 times [2020-12-22 13:17:38,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:38,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540852384] [2020-12-22 13:17:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:38,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540852384] [2020-12-22 13:17:38,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:38,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:17:38,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416348937] [2020-12-22 13:17:38,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:17:38,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:38,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:17:38,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:17:38,854 INFO L87 Difference]: Start difference. First operand 11411 states and 15070 transitions. Second operand 3 states. [2020-12-22 13:17:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:40,905 INFO L93 Difference]: Finished difference Result 23146 states and 30541 transitions. [2020-12-22 13:17:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:17:40,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2020-12-22 13:17:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:40,920 INFO L225 Difference]: With dead ends: 23146 [2020-12-22 13:17:40,920 INFO L226 Difference]: Without dead ends: 13344 [2020-12-22 13:17:40,930 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 13:17:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13344 states. [2020-12-22 13:17:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13344 to 11393. [2020-12-22 13:17:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11393 states. [2020-12-22 13:17:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11393 states to 11393 states and 15034 transitions. [2020-12-22 13:17:42,351 INFO L78 Accepts]: Start accepts. Automaton has 11393 states and 15034 transitions. Word has length 151 [2020-12-22 13:17:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:42,351 INFO L481 AbstractCegarLoop]: Abstraction has 11393 states and 15034 transitions. [2020-12-22 13:17:42,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:17:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 11393 states and 15034 transitions. [2020-12-22 13:17:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 13:17:42,358 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:42,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:42,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 13:17:42,358 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash 2044118615, now seen corresponding path program 1 times [2020-12-22 13:17:42,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:42,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528412699] [2020-12-22 13:17:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:42,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528412699] [2020-12-22 13:17:42,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:17:42,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:17:42,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845702865] [2020-12-22 13:17:42,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:17:42,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:42,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:17:42,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:17:42,765 INFO L87 Difference]: Start difference. First operand 11393 states and 15034 transitions. Second operand 4 states. [2020-12-22 13:17:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:44,779 INFO L93 Difference]: Finished difference Result 23134 states and 30511 transitions. [2020-12-22 13:17:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:17:44,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-12-22 13:17:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:44,794 INFO L225 Difference]: With dead ends: 23134 [2020-12-22 13:17:44,794 INFO L226 Difference]: Without dead ends: 13350 [2020-12-22 13:17:44,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 13:17:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13350 states. [2020-12-22 13:17:46,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13350 to 11399. [2020-12-22 13:17:46,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11399 states. [2020-12-22 13:17:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11399 states to 11399 states and 15040 transitions. [2020-12-22 13:17:46,195 INFO L78 Accepts]: Start accepts. Automaton has 11399 states and 15040 transitions. Word has length 151 [2020-12-22 13:17:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:46,196 INFO L481 AbstractCegarLoop]: Abstraction has 11399 states and 15040 transitions. [2020-12-22 13:17:46,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:17:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 11399 states and 15040 transitions. [2020-12-22 13:17:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 13:17:46,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:46,204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:46,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 13:17:46,204 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:46,205 INFO L82 PathProgramCache]: Analyzing trace with hash -633246503, now seen corresponding path program 1 times [2020-12-22 13:17:46,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:46,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846750070] [2020-12-22 13:17:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:46,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846750070] [2020-12-22 13:17:46,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080957238] [2020-12-22 13:17:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2779 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:17:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:17:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:17:47,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:17:47,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-22 13:17:47,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796239875] [2020-12-22 13:17:47,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:17:47,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:47,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:17:47,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:17:47,580 INFO L87 Difference]: Start difference. First operand 11399 states and 15040 transitions. Second operand 7 states. [2020-12-22 13:17:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:17:51,518 INFO L93 Difference]: Finished difference Result 37365 states and 49318 transitions. [2020-12-22 13:17:51,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:17:51,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 152 [2020-12-22 13:17:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:17:51,555 INFO L225 Difference]: With dead ends: 37365 [2020-12-22 13:17:51,555 INFO L226 Difference]: Without dead ends: 26005 [2020-12-22 13:17:51,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:17:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26005 states. [2020-12-22 13:17:53,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26005 to 11519. [2020-12-22 13:17:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11519 states. [2020-12-22 13:17:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 15217 transitions. [2020-12-22 13:17:53,158 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 15217 transitions. Word has length 152 [2020-12-22 13:17:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:17:53,159 INFO L481 AbstractCegarLoop]: Abstraction has 11519 states and 15217 transitions. [2020-12-22 13:17:53,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:17:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 15217 transitions. [2020-12-22 13:17:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 13:17:53,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:17:53,166 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:53,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 13:17:53,367 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:17:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:17:53,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1636305003, now seen corresponding path program 1 times [2020-12-22 13:17:53,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:17:53,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479646630] [2020-12-22 13:17:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:17:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:17:53,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479646630] [2020-12-22 13:17:53,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177004292] [2020-12-22 13:17:53,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:17:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:17:58,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2789 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:17:58,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:17:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:17:58,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:17:58,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-22 13:17:58,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710208467] [2020-12-22 13:17:58,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:17:58,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:17:58,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:17:58,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:17:58,756 INFO L87 Difference]: Start difference. First operand 11519 states and 15217 transitions. Second operand 7 states. [2020-12-22 13:18:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:01,507 INFO L93 Difference]: Finished difference Result 23386 states and 30877 transitions. [2020-12-22 13:18:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:01,508 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2020-12-22 13:18:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:01,522 INFO L225 Difference]: With dead ends: 23386 [2020-12-22 13:18:01,522 INFO L226 Difference]: Without dead ends: 13494 [2020-12-22 13:18:01,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:18:01,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2020-12-22 13:18:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 11525. [2020-12-22 13:18:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11525 states. [2020-12-22 13:18:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11525 states to 11525 states and 15223 transitions. [2020-12-22 13:18:03,063 INFO L78 Accepts]: Start accepts. Automaton has 11525 states and 15223 transitions. Word has length 153 [2020-12-22 13:18:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:03,064 INFO L481 AbstractCegarLoop]: Abstraction has 11525 states and 15223 transitions. [2020-12-22 13:18:03,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:18:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 11525 states and 15223 transitions. [2020-12-22 13:18:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-22 13:18:03,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:03,072 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:18:03,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 13:18:03,283 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:03,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1898773097, now seen corresponding path program 2 times [2020-12-22 13:18:03,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:03,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689252637] [2020-12-22 13:18:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:18:03,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689252637] [2020-12-22 13:18:03,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737827045] [2020-12-22 13:18:03,912 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:18:08,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:18:08,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:18:08,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 2825 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 13:18:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:18:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:18:08,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:18:08,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-12-22 13:18:08,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710007329] [2020-12-22 13:18:08,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:18:08,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:08,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:18:08,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:18:08,377 INFO L87 Difference]: Start difference. First operand 11525 states and 15223 transitions. Second operand 9 states. [2020-12-22 13:18:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:11,337 INFO L93 Difference]: Finished difference Result 23398 states and 30889 transitions. [2020-12-22 13:18:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:18:11,338 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 154 [2020-12-22 13:18:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:11,358 INFO L225 Difference]: With dead ends: 23398 [2020-12-22 13:18:11,358 INFO L226 Difference]: Without dead ends: 13500 [2020-12-22 13:18:11,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:18:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13500 states. [2020-12-22 13:18:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13500 to 11531. [2020-12-22 13:18:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11531 states. [2020-12-22 13:18:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11531 states to 11531 states and 15229 transitions. [2020-12-22 13:18:12,946 INFO L78 Accepts]: Start accepts. Automaton has 11531 states and 15229 transitions. Word has length 154 [2020-12-22 13:18:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:12,946 INFO L481 AbstractCegarLoop]: Abstraction has 11531 states and 15229 transitions. [2020-12-22 13:18:12,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:18:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11531 states and 15229 transitions. [2020-12-22 13:18:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 13:18:12,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:12,952 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:18:13,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 13:18:13,154 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:13,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1445349419, now seen corresponding path program 3 times [2020-12-22 13:18:13,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:13,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454201178] [2020-12-22 13:18:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:18:13,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454201178] [2020-12-22 13:18:13,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773674426] [2020-12-22 13:18:13,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:18:22,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 13:18:22,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:18:22,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 2743 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 13:18:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:18:22,378 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 13:18:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:18:22,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:18:22,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7] total 15 [2020-12-22 13:18:22,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126116443] [2020-12-22 13:18:22,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:18:22,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:22,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:18:22,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:18:22,764 INFO L87 Difference]: Start difference. First operand 11531 states and 15229 transitions. Second operand 10 states. [2020-12-22 13:18:26,095 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 13:18:40,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:40,415 INFO L93 Difference]: Finished difference Result 100181 states and 132824 transitions. [2020-12-22 13:18:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 13:18:40,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 155 [2020-12-22 13:18:40,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:40,509 INFO L225 Difference]: With dead ends: 100181 [2020-12-22 13:18:40,509 INFO L226 Difference]: Without dead ends: 90277 [2020-12-22 13:18:40,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 13:18:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90277 states. [2020-12-22 13:18:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90277 to 11549. [2020-12-22 13:18:43,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11549 states. [2020-12-22 13:18:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11549 states to 11549 states and 15241 transitions. [2020-12-22 13:18:43,523 INFO L78 Accepts]: Start accepts. Automaton has 11549 states and 15241 transitions. Word has length 155 [2020-12-22 13:18:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:43,524 INFO L481 AbstractCegarLoop]: Abstraction has 11549 states and 15241 transitions. [2020-12-22 13:18:43,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:18:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11549 states and 15241 transitions. [2020-12-22 13:18:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 13:18:43,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:43,529 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:18:43,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:18:43,733 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:43,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:43,734 INFO L82 PathProgramCache]: Analyzing trace with hash -303910570, now seen corresponding path program 1 times [2020-12-22 13:18:43,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:43,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588653371] [2020-12-22 13:18:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 13:18:43,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588653371] [2020-12-22 13:18:43,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182213942] [2020-12-22 13:18:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:18:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:44,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2829 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:18:44,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:18:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 13:18:45,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:18:45,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 13:18:45,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136556329] [2020-12-22 13:18:45,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:18:45,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:45,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:18:45,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:18:45,070 INFO L87 Difference]: Start difference. First operand 11549 states and 15241 transitions. Second operand 5 states. [2020-12-22 13:18:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:51,536 INFO L93 Difference]: Finished difference Result 41297 states and 54517 transitions. [2020-12-22 13:18:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:18:51,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-12-22 13:18:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:51,572 INFO L225 Difference]: With dead ends: 41297 [2020-12-22 13:18:51,573 INFO L226 Difference]: Without dead ends: 31375 [2020-12-22 13:18:51,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:18:51,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31375 states. [2020-12-22 13:18:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31375 to 11699. [2020-12-22 13:18:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11699 states. [2020-12-22 13:18:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11699 states to 11699 states and 15424 transitions. [2020-12-22 13:18:54,240 INFO L78 Accepts]: Start accepts. Automaton has 11699 states and 15424 transitions. Word has length 156 [2020-12-22 13:18:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:54,240 INFO L481 AbstractCegarLoop]: Abstraction has 11699 states and 15424 transitions. [2020-12-22 13:18:54,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:18:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 11699 states and 15424 transitions. [2020-12-22 13:18:54,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-22 13:18:54,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:54,246 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:18:54,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:18:54,452 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash -269932465, now seen corresponding path program 2 times [2020-12-22 13:18:54,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:54,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731603618] [2020-12-22 13:18:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:18:54,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731603618] [2020-12-22 13:18:54,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:54,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:18:54,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227045445] [2020-12-22 13:18:54,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:18:54,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:54,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:18:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:18:54,706 INFO L87 Difference]: Start difference. First operand 11699 states and 15424 transitions. Second operand 4 states. [2020-12-22 13:18:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:59,534 INFO L93 Difference]: Finished difference Result 26166 states and 34479 transitions. [2020-12-22 13:18:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:18:59,535 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 160 [2020-12-22 13:18:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:59,551 INFO L225 Difference]: With dead ends: 26166 [2020-12-22 13:18:59,551 INFO L226 Difference]: Without dead ends: 16094 [2020-12-22 13:18:59,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:18:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16094 states. [2020-12-22 13:19:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16094 to 11672. [2020-12-22 13:19:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11672 states. [2020-12-22 13:19:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11672 states to 11672 states and 15370 transitions. [2020-12-22 13:19:02,124 INFO L78 Accepts]: Start accepts. Automaton has 11672 states and 15370 transitions. Word has length 160 [2020-12-22 13:19:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:02,124 INFO L481 AbstractCegarLoop]: Abstraction has 11672 states and 15370 transitions. [2020-12-22 13:19:02,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:19:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 11672 states and 15370 transitions. [2020-12-22 13:19:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-22 13:19:02,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:02,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:02,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 13:19:02,131 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:02,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:02,132 INFO L82 PathProgramCache]: Analyzing trace with hash 840327395, now seen corresponding path program 1 times [2020-12-22 13:19:02,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:02,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716043729] [2020-12-22 13:19:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:19:02,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716043729] [2020-12-22 13:19:02,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300991474] [2020-12-22 13:19:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:03,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:19:03,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:19:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:19:03,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:19:03,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 13:19:03,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96693901] [2020-12-22 13:19:03,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:19:03,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:03,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:19:03,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:19:03,652 INFO L87 Difference]: Start difference. First operand 11672 states and 15370 transitions. Second operand 6 states. [2020-12-22 13:19:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:12,680 INFO L93 Difference]: Finished difference Result 51228 states and 67518 transitions. [2020-12-22 13:19:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:19:12,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2020-12-22 13:19:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:12,724 INFO L225 Difference]: With dead ends: 51228 [2020-12-22 13:19:12,724 INFO L226 Difference]: Without dead ends: 41183 [2020-12-22 13:19:12,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:19:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41183 states. [2020-12-22 13:19:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41183 to 11822. [2020-12-22 13:19:15,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11822 states. [2020-12-22 13:19:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11822 states to 11822 states and 15553 transitions. [2020-12-22 13:19:15,540 INFO L78 Accepts]: Start accepts. Automaton has 11822 states and 15553 transitions. Word has length 162 [2020-12-22 13:19:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:15,540 INFO L481 AbstractCegarLoop]: Abstraction has 11822 states and 15553 transitions. [2020-12-22 13:19:15,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:19:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 11822 states and 15553 transitions. [2020-12-22 13:19:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 13:19:15,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:15,549 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:15,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:15,761 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:15,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:15,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1428424420, now seen corresponding path program 2 times [2020-12-22 13:19:15,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:15,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023115009] [2020-12-22 13:19:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:19:16,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023115009] [2020-12-22 13:19:16,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479543778] [2020-12-22 13:19:16,004 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:17,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:19:17,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:19:17,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 2898 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:19:17,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:19:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:19:17,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:19:17,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 13:19:17,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403035442] [2020-12-22 13:19:17,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:19:17,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:19:17,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:19:17,998 INFO L87 Difference]: Start difference. First operand 11822 states and 15553 transitions. Second operand 7 states. [2020-12-22 13:19:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:30,110 INFO L93 Difference]: Finished difference Result 61123 states and 80558 transitions. [2020-12-22 13:19:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:19:30,111 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 166 [2020-12-22 13:19:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:30,161 INFO L225 Difference]: With dead ends: 61123 [2020-12-22 13:19:30,161 INFO L226 Difference]: Without dead ends: 50928 [2020-12-22 13:19:30,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:19:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50928 states. [2020-12-22 13:19:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50928 to 11972. [2020-12-22 13:19:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11972 states. [2020-12-22 13:19:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11972 states to 11972 states and 15736 transitions. [2020-12-22 13:19:33,041 INFO L78 Accepts]: Start accepts. Automaton has 11972 states and 15736 transitions. Word has length 166 [2020-12-22 13:19:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:33,041 INFO L481 AbstractCegarLoop]: Abstraction has 11972 states and 15736 transitions. [2020-12-22 13:19:33,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:19:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 11972 states and 15736 transitions. [2020-12-22 13:19:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 13:19:33,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:33,048 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:33,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 13:19:33,250 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:33,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:33,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2142115475, now seen corresponding path program 1 times [2020-12-22 13:19:33,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:33,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562430726] [2020-12-22 13:19:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 13:19:33,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562430726] [2020-12-22 13:19:33,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817240081] [2020-12-22 13:19:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 13:19:39,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:19:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 13:19:39,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:19:39,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-22 13:19:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773724087] [2020-12-22 13:19:39,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:19:39,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:19:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:19:39,446 INFO L87 Difference]: Start difference. First operand 11972 states and 15736 transitions. Second operand 11 states. [2020-12-22 13:19:44,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:44,416 INFO L93 Difference]: Finished difference Result 24706 states and 32404 transitions. [2020-12-22 13:19:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:19:44,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 166 [2020-12-22 13:19:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:44,430 INFO L225 Difference]: With dead ends: 24706 [2020-12-22 13:19:44,430 INFO L226 Difference]: Without dead ends: 14361 [2020-12-22 13:19:44,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:19:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14361 states. [2020-12-22 13:19:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14361 to 11978. [2020-12-22 13:19:47,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11978 states. [2020-12-22 13:19:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11978 states to 11978 states and 15742 transitions. [2020-12-22 13:19:47,214 INFO L78 Accepts]: Start accepts. Automaton has 11978 states and 15742 transitions. Word has length 166 [2020-12-22 13:19:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:47,215 INFO L481 AbstractCegarLoop]: Abstraction has 11978 states and 15742 transitions. [2020-12-22 13:19:47,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:19:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 11978 states and 15742 transitions. [2020-12-22 13:19:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 13:19:47,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:47,221 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:47,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 13:19:47,426 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash -731855271, now seen corresponding path program 2 times [2020-12-22 13:19:47,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:47,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573520226] [2020-12-22 13:19:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 13:19:48,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573520226] [2020-12-22 13:19:48,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131942794] [2020-12-22 13:19:48,511 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true