/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:22:52,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:22:52,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:22:52,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:22:52,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:22:52,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:22:52,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:22:52,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:22:52,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:22:52,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:22:52,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:22:52,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:22:52,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:22:52,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:22:52,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:22:52,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:22:52,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:22:52,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:22:52,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:22:52,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:22:52,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:22:52,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:22:52,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:22:52,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:22:52,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:22:52,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:22:52,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:22:52,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:22:52,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:22:52,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:22:52,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:22:52,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:22:52,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:22:52,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:22:52,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:22:52,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:22:52,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:22:52,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:22:52,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:22:52,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:22:52,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:22:52,941 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:22:53,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:22:53,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:22:53,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:22:53,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:22:53,008 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:22:53,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:22:53,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:22:53,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:22:53,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:22:53,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:22:53,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:22:53,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:22:53,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:22:53,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:22:53,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:22:53,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:22:53,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:22:53,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:22:53,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:22:53,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:22:53,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:22:53,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:22:53,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:22:53,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:22:53,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:22:53,013 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:22:53,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:22:53,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:22:53,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:22:53,453 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:22:53,453 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:22:53,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2020-12-22 13:22:53,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f6041984/e147f3ad94364a2e8a9f7175bcbeb397/FLAGad6fbbeb2 [2020-12-22 13:22:54,739 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:22:54,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2020-12-22 13:22:54,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f6041984/e147f3ad94364a2e8a9f7175bcbeb397/FLAGad6fbbeb2 [2020-12-22 13:22:55,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f6041984/e147f3ad94364a2e8a9f7175bcbeb397 [2020-12-22 13:22:55,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:22:55,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:22:55,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:22:55,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:22:55,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:22:55,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:22:55" (1/1) ... [2020-12-22 13:22:55,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7898fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:55, skipping insertion in model container [2020-12-22 13:22:55,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:22:55" (1/1) ... [2020-12-22 13:22:55,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:22:55,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:22:56,226 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2020-12-22 13:22:56,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:22:56,934 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:22:57,156 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2020-12-22 13:22:57,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:22:57,650 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:22:57,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57 WrapperNode [2020-12-22 13:22:57,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:22:57,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:22:57,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:22:57,652 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:22:57,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:57,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:58,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:22:58,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:22:58,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:22:58,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:22:58,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:58,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:58,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:58,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:59,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:59,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:59,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (1/1) ... [2020-12-22 13:22:59,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:22:59,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:22:59,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:22:59,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:22:59,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (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 13:22:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:22:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:22:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:22:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:22:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:22:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:22:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:22:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:22:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:22:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:22:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:22:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:22:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:22:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:22:59,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:23:19,712 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:23:19,713 INFO L299 CfgBuilder]: Removed 3847 assume(true) statements. [2020-12-22 13:23:19,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:19 BoogieIcfgContainer [2020-12-22 13:23:19,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:23:19,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:23:19,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:23:19,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:23:19,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:22:55" (1/3) ... [2020-12-22 13:23:19,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6558c525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:23:19, skipping insertion in model container [2020-12-22 13:23:19,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:22:57" (2/3) ... [2020-12-22 13:23:19,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6558c525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:23:19, skipping insertion in model container [2020-12-22 13:23:19,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:19" (3/3) ... [2020-12-22 13:23:19,733 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2020-12-22 13:23:19,746 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:23:19,754 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:23:19,770 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:23:19,825 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:23:19,825 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:23:19,825 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:23:19,826 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:23:19,826 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:23:19,826 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:23:19,826 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:23:19,826 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:23:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states. [2020-12-22 13:23:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 13:23:19,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:19,912 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] [2020-12-22 13:23:19,913 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:19,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1642635718, now seen corresponding path program 1 times [2020-12-22 13:23:19,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:19,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257108947] [2020-12-22 13:23:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:23:20,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257108947] [2020-12-22 13:23:20,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:20,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:20,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083477695] [2020-12-22 13:23:20,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:20,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:20,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:20,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:20,595 INFO L87 Difference]: Start difference. First operand 4667 states. Second operand 3 states. [2020-12-22 13:23:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:21,488 INFO L93 Difference]: Finished difference Result 13949 states and 20444 transitions. [2020-12-22 13:23:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:21,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-22 13:23:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:21,574 INFO L225 Difference]: With dead ends: 13949 [2020-12-22 13:23:21,574 INFO L226 Difference]: Without dead ends: 9275 [2020-12-22 13:23:21,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9275 states. [2020-12-22 13:23:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9275 to 9275. [2020-12-22 13:23:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9275 states. [2020-12-22 13:23:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9275 states to 9275 states and 13046 transitions. [2020-12-22 13:23:21,976 INFO L78 Accepts]: Start accepts. Automaton has 9275 states and 13046 transitions. Word has length 22 [2020-12-22 13:23:21,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:21,977 INFO L481 AbstractCegarLoop]: Abstraction has 9275 states and 13046 transitions. [2020-12-22 13:23:21,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 9275 states and 13046 transitions. [2020-12-22 13:23:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 13:23:21,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:21,989 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] [2020-12-22 13:23:21,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:23:21,990 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash -899430506, now seen corresponding path program 1 times [2020-12-22 13:23:21,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:21,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240559004] [2020-12-22 13:23:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:23:22,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240559004] [2020-12-22 13:23:22,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:22,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:23:22,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395343288] [2020-12-22 13:23:22,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:23:22,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:22,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:23:22,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:22,190 INFO L87 Difference]: Start difference. First operand 9275 states and 13046 transitions. Second operand 4 states. [2020-12-22 13:23:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:22,707 INFO L93 Difference]: Finished difference Result 18526 states and 26063 transitions. [2020-12-22 13:23:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:23:22,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-22 13:23:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:22,758 INFO L225 Difference]: With dead ends: 18526 [2020-12-22 13:23:22,758 INFO L226 Difference]: Without dead ends: 9274 [2020-12-22 13:23:22,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:23:22,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9274 states. [2020-12-22 13:23:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9274 to 9274. [2020-12-22 13:23:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9274 states. [2020-12-22 13:23:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 13042 transitions. [2020-12-22 13:23:23,514 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 13042 transitions. Word has length 26 [2020-12-22 13:23:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:23,515 INFO L481 AbstractCegarLoop]: Abstraction has 9274 states and 13042 transitions. [2020-12-22 13:23:23,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:23:23,516 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 13042 transitions. [2020-12-22 13:23:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 13:23:23,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:23,522 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:23:23,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:23:23,524 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:23,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1619061827, now seen corresponding path program 1 times [2020-12-22 13:23:23,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:23,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935998220] [2020-12-22 13:23:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:23:23,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935998220] [2020-12-22 13:23:23,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:23,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:23:23,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310416278] [2020-12-22 13:23:23,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:23:23,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:23:23,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:23:23,771 INFO L87 Difference]: Start difference. First operand 9274 states and 13042 transitions. Second operand 5 states. [2020-12-22 13:23:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:25,419 INFO L93 Difference]: Finished difference Result 27774 states and 39071 transitions. [2020-12-22 13:23:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:23:25,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 13:23:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:25,506 INFO L225 Difference]: With dead ends: 27774 [2020-12-22 13:23:25,507 INFO L226 Difference]: Without dead ends: 18519 [2020-12-22 13:23:25,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:23:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18519 states. [2020-12-22 13:23:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18519 to 18279. [2020-12-22 13:23:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18279 states. [2020-12-22 13:23:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18279 states to 18279 states and 25739 transitions. [2020-12-22 13:23:26,288 INFO L78 Accepts]: Start accepts. Automaton has 18279 states and 25739 transitions. Word has length 38 [2020-12-22 13:23:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:26,289 INFO L481 AbstractCegarLoop]: Abstraction has 18279 states and 25739 transitions. [2020-12-22 13:23:26,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:23:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 18279 states and 25739 transitions. [2020-12-22 13:23:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 13:23:26,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:26,305 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:26,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:23:26,306 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:26,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:26,307 INFO L82 PathProgramCache]: Analyzing trace with hash -770183526, now seen corresponding path program 1 times [2020-12-22 13:23:26,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:26,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64563152] [2020-12-22 13:23:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:23:26,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64563152] [2020-12-22 13:23:26,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:26,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:26,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201558297] [2020-12-22 13:23:26,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:26,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:26,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:26,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:26,439 INFO L87 Difference]: Start difference. First operand 18279 states and 25739 transitions. Second operand 3 states. [2020-12-22 13:23:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:27,394 INFO L93 Difference]: Finished difference Result 44717 states and 62949 transitions. [2020-12-22 13:23:27,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:27,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 13:23:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:27,466 INFO L225 Difference]: With dead ends: 44717 [2020-12-22 13:23:27,466 INFO L226 Difference]: Without dead ends: 26461 [2020-12-22 13:23:27,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2020-12-22 13:23:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26437. [2020-12-22 13:23:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26437 states. [2020-12-22 13:23:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26437 states to 26437 states and 37208 transitions. [2020-12-22 13:23:28,605 INFO L78 Accepts]: Start accepts. Automaton has 26437 states and 37208 transitions. Word has length 59 [2020-12-22 13:23:28,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:28,606 INFO L481 AbstractCegarLoop]: Abstraction has 26437 states and 37208 transitions. [2020-12-22 13:23:28,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:28,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26437 states and 37208 transitions. [2020-12-22 13:23:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 13:23:28,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:28,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:28,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:23:28,617 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1015760832, now seen corresponding path program 2 times [2020-12-22 13:23:28,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:28,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520721527] [2020-12-22 13:23:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:23:28,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520721527] [2020-12-22 13:23:28,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:28,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:28,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182724339] [2020-12-22 13:23:28,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:28,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:28,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:28,752 INFO L87 Difference]: Start difference. First operand 26437 states and 37208 transitions. Second operand 3 states. [2020-12-22 13:23:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:30,379 INFO L93 Difference]: Finished difference Result 52913 states and 74493 transitions. [2020-12-22 13:23:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:30,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 13:23:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:30,467 INFO L225 Difference]: With dead ends: 52913 [2020-12-22 13:23:30,468 INFO L226 Difference]: Without dead ends: 35133 [2020-12-22 13:23:30,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35133 states. [2020-12-22 13:23:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35133 to 35109. [2020-12-22 13:23:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35109 states. [2020-12-22 13:23:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35109 states to 35109 states and 49414 transitions. [2020-12-22 13:23:31,743 INFO L78 Accepts]: Start accepts. Automaton has 35109 states and 49414 transitions. Word has length 59 [2020-12-22 13:23:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:31,744 INFO L481 AbstractCegarLoop]: Abstraction has 35109 states and 49414 transitions. [2020-12-22 13:23:31,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 35109 states and 49414 transitions. [2020-12-22 13:23:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 13:23:31,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:31,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 13:23:31,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:23:31,765 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:31,767 INFO L82 PathProgramCache]: Analyzing trace with hash -591221986, now seen corresponding path program 1 times [2020-12-22 13:23:31,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:31,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111510349] [2020-12-22 13:23:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:23:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111510349] [2020-12-22 13:23:31,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:31,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604758127] [2020-12-22 13:23:31,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:31,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:31,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:31,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:31,930 INFO L87 Difference]: Start difference. First operand 35109 states and 49414 transitions. Second operand 3 states. [2020-12-22 13:23:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:33,385 INFO L93 Difference]: Finished difference Result 70257 states and 98905 transitions. [2020-12-22 13:23:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:33,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 13:23:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:33,515 INFO L225 Difference]: With dead ends: 70257 [2020-12-22 13:23:33,515 INFO L226 Difference]: Without dead ends: 43805 [2020-12-22 13:23:33,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43805 states. [2020-12-22 13:23:34,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43805 to 43781. [2020-12-22 13:23:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43781 states. [2020-12-22 13:23:34,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43781 states to 43781 states and 61620 transitions. [2020-12-22 13:23:34,752 INFO L78 Accepts]: Start accepts. Automaton has 43781 states and 61620 transitions. Word has length 73 [2020-12-22 13:23:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:34,753 INFO L481 AbstractCegarLoop]: Abstraction has 43781 states and 61620 transitions. [2020-12-22 13:23:34,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 43781 states and 61620 transitions. [2020-12-22 13:23:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 13:23:34,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:34,781 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:34,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:23:34,782 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash 638916036, now seen corresponding path program 1 times [2020-12-22 13:23:34,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:34,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598307831] [2020-12-22 13:23:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:23:34,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598307831] [2020-12-22 13:23:34,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:34,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:23:34,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476443599] [2020-12-22 13:23:34,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:23:34,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:34,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:23:34,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:34,914 INFO L87 Difference]: Start difference. First operand 43781 states and 61620 transitions. Second operand 4 states. [2020-12-22 13:23:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:36,752 INFO L93 Difference]: Finished difference Result 96467 states and 135773 transitions. [2020-12-22 13:23:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:23:36,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-12-22 13:23:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:36,872 INFO L225 Difference]: With dead ends: 96467 [2020-12-22 13:23:36,873 INFO L226 Difference]: Without dead ends: 61343 [2020-12-22 13:23:36,945 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:23:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61343 states. [2020-12-22 13:23:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61343 to 43785. [2020-12-22 13:23:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43785 states. [2020-12-22 13:23:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 61624 transitions. [2020-12-22 13:23:38,505 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 61624 transitions. Word has length 86 [2020-12-22 13:23:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:38,505 INFO L481 AbstractCegarLoop]: Abstraction has 43785 states and 61624 transitions. [2020-12-22 13:23:38,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:23:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 61624 transitions. [2020-12-22 13:23:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 13:23:38,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:38,527 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:38,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:23:38,528 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:38,528 INFO L82 PathProgramCache]: Analyzing trace with hash -280928408, now seen corresponding path program 1 times [2020-12-22 13:23:38,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:38,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103857638] [2020-12-22 13:23:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 13:23:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103857638] [2020-12-22 13:23:38,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:38,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:38,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213342812] [2020-12-22 13:23:38,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:38,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:38,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:38,852 INFO L87 Difference]: Start difference. First operand 43785 states and 61624 transitions. Second operand 3 states. [2020-12-22 13:23:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:41,247 INFO L93 Difference]: Finished difference Result 107888 states and 151875 transitions. [2020-12-22 13:23:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:41,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-12-22 13:23:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:41,383 INFO L225 Difference]: With dead ends: 107888 [2020-12-22 13:23:41,384 INFO L226 Difference]: Without dead ends: 85728 [2020-12-22 13:23:41,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85728 states. [2020-12-22 13:23:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85728 to 44061. [2020-12-22 13:23:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44061 states. [2020-12-22 13:23:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44061 states to 44061 states and 61900 transitions. [2020-12-22 13:23:43,184 INFO L78 Accepts]: Start accepts. Automaton has 44061 states and 61900 transitions. Word has length 88 [2020-12-22 13:23:43,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:43,184 INFO L481 AbstractCegarLoop]: Abstraction has 44061 states and 61900 transitions. [2020-12-22 13:23:43,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 44061 states and 61900 transitions. [2020-12-22 13:23:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 13:23:43,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:43,206 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:43,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:23:43,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:43,207 INFO L82 PathProgramCache]: Analyzing trace with hash -284281593, now seen corresponding path program 1 times [2020-12-22 13:23:43,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:43,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307641563] [2020-12-22 13:23:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 13:23:43,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307641563] [2020-12-22 13:23:43,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:43,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:23:43,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799909698] [2020-12-22 13:23:43,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:23:43,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:43,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:23:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:43,380 INFO L87 Difference]: Start difference. First operand 44061 states and 61900 transitions. Second operand 4 states. [2020-12-22 13:23:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:46,409 INFO L93 Difference]: Finished difference Result 108434 states and 152250 transitions. [2020-12-22 13:23:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:23:46,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-22 13:23:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:46,507 INFO L225 Difference]: With dead ends: 108434 [2020-12-22 13:23:46,508 INFO L226 Difference]: Without dead ends: 64396 [2020-12-22 13:23:46,558 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 13:23:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64396 states. [2020-12-22 13:23:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64396 to 43647. [2020-12-22 13:23:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43647 states. [2020-12-22 13:23:48,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43647 states to 43647 states and 61072 transitions. [2020-12-22 13:23:48,123 INFO L78 Accepts]: Start accepts. Automaton has 43647 states and 61072 transitions. Word has length 90 [2020-12-22 13:23:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:48,123 INFO L481 AbstractCegarLoop]: Abstraction has 43647 states and 61072 transitions. [2020-12-22 13:23:48,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:23:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 43647 states and 61072 transitions. [2020-12-22 13:23:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 13:23:48,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:48,143 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] [2020-12-22 13:23:48,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:23:48,144 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash 298726998, now seen corresponding path program 1 times [2020-12-22 13:23:48,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:48,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872456969] [2020-12-22 13:23:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:23:48,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872456969] [2020-12-22 13:23:48,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:48,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:48,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961302965] [2020-12-22 13:23:48,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:48,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:48,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:48,284 INFO L87 Difference]: Start difference. First operand 43647 states and 61072 transitions. Second operand 3 states. [2020-12-22 13:23:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:51,256 INFO L93 Difference]: Finished difference Result 127145 states and 178332 transitions. [2020-12-22 13:23:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:51,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-22 13:23:51,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:51,367 INFO L225 Difference]: With dead ends: 127145 [2020-12-22 13:23:51,367 INFO L226 Difference]: Without dead ends: 83521 [2020-12-22 13:23:51,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83521 states. [2020-12-22 13:23:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83521 to 53877. [2020-12-22 13:23:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53877 states. [2020-12-22 13:23:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53877 states to 53877 states and 75112 transitions. [2020-12-22 13:23:53,407 INFO L78 Accepts]: Start accepts. Automaton has 53877 states and 75112 transitions. Word has length 90 [2020-12-22 13:23:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:53,408 INFO L481 AbstractCegarLoop]: Abstraction has 53877 states and 75112 transitions. [2020-12-22 13:23:53,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 53877 states and 75112 transitions. [2020-12-22 13:23:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 13:23:53,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:53,423 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] [2020-12-22 13:23:53,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:23:53,423 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash -545278504, now seen corresponding path program 1 times [2020-12-22 13:23:53,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:53,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653716190] [2020-12-22 13:23:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:23:53,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653716190] [2020-12-22 13:23:53,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:53,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:23:53,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343423240] [2020-12-22 13:23:53,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:23:53,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:23:53,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:53,575 INFO L87 Difference]: Start difference. First operand 53877 states and 75112 transitions. Second operand 4 states. [2020-12-22 13:23:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:59,934 INFO L93 Difference]: Finished difference Result 240322 states and 335555 transitions. [2020-12-22 13:23:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:23:59,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-22 13:23:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:00,389 INFO L225 Difference]: With dead ends: 240322 [2020-12-22 13:24:00,390 INFO L226 Difference]: Without dead ends: 186468 [2020-12-22 13:24:00,462 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 13:24:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186468 states. [2020-12-22 13:24:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186468 to 54117. [2020-12-22 13:24:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54117 states. [2020-12-22 13:24:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54117 states to 54117 states and 75352 transitions. [2020-12-22 13:24:03,603 INFO L78 Accepts]: Start accepts. Automaton has 54117 states and 75352 transitions. Word has length 90 [2020-12-22 13:24:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:03,604 INFO L481 AbstractCegarLoop]: Abstraction has 54117 states and 75352 transitions. [2020-12-22 13:24:03,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:24:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 54117 states and 75352 transitions. [2020-12-22 13:24:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 13:24:03,617 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:03,618 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] [2020-12-22 13:24:03,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:24:03,618 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:03,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:03,618 INFO L82 PathProgramCache]: Analyzing trace with hash 735356708, now seen corresponding path program 1 times [2020-12-22 13:24:03,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:03,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157032217] [2020-12-22 13:24:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:24:05,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157032217] [2020-12-22 13:24:05,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:05,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 13:24:05,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700353524] [2020-12-22 13:24:05,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:24:05,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:05,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:24:05,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:24:05,416 INFO L87 Difference]: Start difference. First operand 54117 states and 75352 transitions. Second operand 10 states. [2020-12-22 13:24:05,596 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-12-22 13:24:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:18,907 INFO L93 Difference]: Finished difference Result 212749 states and 297246 transitions. [2020-12-22 13:24:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 13:24:18,908 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-12-22 13:24:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:19,144 INFO L225 Difference]: With dead ends: 212749 [2020-12-22 13:24:19,144 INFO L226 Difference]: Without dead ends: 158655 [2020-12-22 13:24:19,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2020-12-22 13:24:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158655 states. [2020-12-22 13:24:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158655 to 54477. [2020-12-22 13:24:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54477 states. [2020-12-22 13:24:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54477 states to 54477 states and 75592 transitions. [2020-12-22 13:24:24,282 INFO L78 Accepts]: Start accepts. Automaton has 54477 states and 75592 transitions. Word has length 93 [2020-12-22 13:24:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:24,282 INFO L481 AbstractCegarLoop]: Abstraction has 54477 states and 75592 transitions. [2020-12-22 13:24:24,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:24:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 54477 states and 75592 transitions. [2020-12-22 13:24:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 13:24:24,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:24,309 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] [2020-12-22 13:24:24,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:24:24,309 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:24,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1204284911, now seen corresponding path program 1 times [2020-12-22 13:24:24,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:24,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689192798] [2020-12-22 13:24:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:24:25,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689192798] [2020-12-22 13:24:25,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:25,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:24:25,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968549061] [2020-12-22 13:24:25,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:24:25,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:25,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:24:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:24:25,458 INFO L87 Difference]: Start difference. First operand 54477 states and 75592 transitions. Second operand 5 states. [2020-12-22 13:24:33,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:33,061 INFO L93 Difference]: Finished difference Result 148805 states and 206892 transitions. [2020-12-22 13:24:33,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:24:33,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 125 [2020-12-22 13:24:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:33,178 INFO L225 Difference]: With dead ends: 148805 [2020-12-22 13:24:33,178 INFO L226 Difference]: Without dead ends: 94351 [2020-12-22 13:24:33,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:24:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94351 states. [2020-12-22 13:24:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94351 to 55797. [2020-12-22 13:24:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55797 states. [2020-12-22 13:24:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55797 states to 55797 states and 77182 transitions. [2020-12-22 13:24:38,755 INFO L78 Accepts]: Start accepts. Automaton has 55797 states and 77182 transitions. Word has length 125 [2020-12-22 13:24:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:38,755 INFO L481 AbstractCegarLoop]: Abstraction has 55797 states and 77182 transitions. [2020-12-22 13:24:38,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:24:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 55797 states and 77182 transitions. [2020-12-22 13:24:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 13:24:38,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:38,787 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] [2020-12-22 13:24:38,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 13:24:38,787 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1008133905, now seen corresponding path program 1 times [2020-12-22 13:24:38,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:38,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702717627] [2020-12-22 13:24:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:24:38,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702717627] [2020-12-22 13:24:38,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:38,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:24:38,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938875075] [2020-12-22 13:24:38,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:24:38,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:38,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:24:38,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:24:38,970 INFO L87 Difference]: Start difference. First operand 55797 states and 77182 transitions. Second operand 3 states. [2020-12-22 13:24:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:47,442 INFO L93 Difference]: Finished difference Result 146195 states and 203292 transitions. [2020-12-22 13:24:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:24:47,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2020-12-22 13:24:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:47,550 INFO L225 Difference]: With dead ends: 146195 [2020-12-22 13:24:47,551 INFO L226 Difference]: Without dead ends: 90421 [2020-12-22 13:24:47,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:24:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90421 states. [2020-12-22 13:24:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90421 to 55797. [2020-12-22 13:24:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55797 states. [2020-12-22 13:24:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55797 states to 55797 states and 77122 transitions. [2020-12-22 13:24:52,742 INFO L78 Accepts]: Start accepts. Automaton has 55797 states and 77122 transitions. Word has length 125 [2020-12-22 13:24:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:52,742 INFO L481 AbstractCegarLoop]: Abstraction has 55797 states and 77122 transitions. [2020-12-22 13:24:52,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:24:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 55797 states and 77122 transitions. [2020-12-22 13:24:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 13:24:52,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:52,773 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] [2020-12-22 13:24:52,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:24:52,773 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 600856881, now seen corresponding path program 1 times [2020-12-22 13:24:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:52,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503406562] [2020-12-22 13:24:52,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:24:52,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503406562] [2020-12-22 13:24:52,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:52,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:24:52,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077364165] [2020-12-22 13:24:52,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:24:52,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:52,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:24:52,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:24:52,954 INFO L87 Difference]: Start difference. First operand 55797 states and 77122 transitions. Second operand 3 states.