./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--atm--atmtcp.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--atm--atmtcp.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e6823a3e354b35bf05bec5e81d72dc7306859bf56793457624e681693cebdf0b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 15:39:01,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 15:39:01,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 15:39:01,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 15:39:01,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 15:39:01,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 15:39:01,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 15:39:01,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 15:39:01,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 15:39:01,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 15:39:01,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 15:39:01,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 15:39:01,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 15:39:01,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 15:39:01,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 15:39:01,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 15:39:01,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 15:39:01,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 15:39:01,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 15:39:01,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 15:39:01,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 15:39:01,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 15:39:01,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 15:39:01,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 15:39:01,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 15:39:01,662 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 15:39:01,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 15:39:01,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 15:39:01,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 15:39:01,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 15:39:01,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 15:39:01,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 15:39:01,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 15:39:01,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 15:39:01,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 15:39:01,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 15:39:01,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 15:39:01,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 15:39:01,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 15:39:01,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 15:39:01,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 15:39:01,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 15:39:01,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 15:39:01,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 15:39:01,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 15:39:01,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 15:39:01,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 15:39:01,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 15:39:01,702 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 15:39:01,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 15:39:01,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 15:39:01,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 15:39:01,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 15:39:01,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 15:39:01,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 15:39:01,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 15:39:01,704 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 15:39:01,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 15:39:01,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 15:39:01,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 15:39:01,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 15:39:01,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:39:01,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 15:39:01,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 15:39:01,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 15:39:01,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 15:39:01,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 15:39:01,707 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 15:39:01,707 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 15:39:01,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 15:39:01,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 15:39:01,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6823a3e354b35bf05bec5e81d72dc7306859bf56793457624e681693cebdf0b [2021-11-06 15:39:01,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 15:39:01,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 15:39:01,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 15:39:01,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 15:39:01,921 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 15:39:01,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--atm--atmtcp.ko-entry_point.cil.out.i [2021-11-06 15:39:01,974 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18062d888/1a7f9e5a44f1436b9d564270774f8f7b/FLAGe777cd550 [2021-11-06 15:39:02,561 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 15:39:02,562 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--atm--atmtcp.ko-entry_point.cil.out.i [2021-11-06 15:39:02,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18062d888/1a7f9e5a44f1436b9d564270774f8f7b/FLAGe777cd550 [2021-11-06 15:39:02,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18062d888/1a7f9e5a44f1436b9d564270774f8f7b [2021-11-06 15:39:02,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 15:39:02,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 15:39:02,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 15:39:02,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 15:39:03,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 15:39:03,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:39:02" (1/1) ... [2021-11-06 15:39:03,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52edc83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:03, skipping insertion in model container [2021-11-06 15:39:03,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:39:02" (1/1) ... [2021-11-06 15:39:03,008 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 15:39:03,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 15:39:03,837 WARN L228 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--atm--atmtcp.ko-entry_point.cil.out.i[225078,225091] [2021-11-06 15:39:03,864 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-06 15:39:03,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:39:03,903 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 15:39:04,107 WARN L228 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--atm--atmtcp.ko-entry_point.cil.out.i[225078,225091] [2021-11-06 15:39:04,114 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-06 15:39:04,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:39:04,158 INFO L208 MainTranslator]: Completed translation [2021-11-06 15:39:04,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04 WrapperNode [2021-11-06 15:39:04,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 15:39:04,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 15:39:04,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 15:39:04,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 15:39:04,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 15:39:04,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 15:39:04,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 15:39:04,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 15:39:04,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 15:39:04,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 15:39:04,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 15:39:04,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 15:39:04,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (1/1) ... [2021-11-06 15:39:04,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:39:04,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:39:04,852 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 15:39:04,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 15:39:04,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 15:39:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-06 15:39:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 15:39:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 15:39:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 15:39:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 15:39:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 15:39:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 15:39:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 15:39:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 15:39:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 15:39:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-06 15:39:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 15:39:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 15:39:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 15:39:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 15:39:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 15:39:04,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 15:39:43,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 15:39:43,221 INFO L299 CfgBuilder]: Removed 1124 assume(true) statements. [2021-11-06 15:39:43,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:39:43 BoogieIcfgContainer [2021-11-06 15:39:43,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 15:39:43,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 15:39:43,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 15:39:43,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 15:39:43,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 03:39:02" (1/3) ... [2021-11-06 15:39:43,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e821787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:39:43, skipping insertion in model container [2021-11-06 15:39:43,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:39:04" (2/3) ... [2021-11-06 15:39:43,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e821787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:39:43, skipping insertion in model container [2021-11-06 15:39:43,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:39:43" (3/3) ... [2021-11-06 15:39:43,229 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--atm--atmtcp.ko-entry_point.cil.out.i [2021-11-06 15:39:43,232 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 15:39:43,233 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-06 15:39:43,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 15:39:43,270 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 15:39:43,270 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-06 15:39:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 1596 states, 1589 states have (on average 1.5160478288231591) internal successors, (2409), 1595 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-06 15:39:43,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:39:43,306 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:39:43,306 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:39:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:39:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1301306874, now seen corresponding path program 1 times [2021-11-06 15:39:43,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:39:43,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516164222] [2021-11-06 15:39:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:39:43,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:39:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:39:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:39:43,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:39:43,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516164222] [2021-11-06 15:39:43,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516164222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:39:43,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:39:43,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:39:43,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96660903] [2021-11-06 15:39:43,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 15:39:43,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:39:43,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 15:39:43,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 15:39:43,653 INFO L87 Difference]: Start difference. First operand has 1596 states, 1589 states have (on average 1.5160478288231591) internal successors, (2409), 1595 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:43,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:39:43,728 INFO L93 Difference]: Finished difference Result 3188 states and 4813 transitions. [2021-11-06 15:39:43,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 15:39:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-06 15:39:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:39:43,748 INFO L225 Difference]: With dead ends: 3188 [2021-11-06 15:39:43,748 INFO L226 Difference]: Without dead ends: 1583 [2021-11-06 15:39:43,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 15:39:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-11-06 15:39:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1583. [2021-11-06 15:39:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1577 states have (on average 1.488268864933418) internal successors, (2347), 1582 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2347 transitions. [2021-11-06 15:39:43,836 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2347 transitions. Word has length 42 [2021-11-06 15:39:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:39:43,836 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 2347 transitions. [2021-11-06 15:39:43,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2347 transitions. [2021-11-06 15:39:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-06 15:39:43,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:39:43,838 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:39:43,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 15:39:43,839 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:39:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:39:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash -568676220, now seen corresponding path program 1 times [2021-11-06 15:39:43,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:39:43,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802221120] [2021-11-06 15:39:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:39:43,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:39:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:39:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:39:44,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:39:44,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802221120] [2021-11-06 15:39:44,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802221120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:39:44,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:39:44,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:39:44,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362935633] [2021-11-06 15:39:44,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:39:44,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:39:44,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:39:44,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:39:44,007 INFO L87 Difference]: Start difference. First operand 1583 states and 2347 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:39:44,147 INFO L93 Difference]: Finished difference Result 4676 states and 6964 transitions. [2021-11-06 15:39:44,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:39:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-06 15:39:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:39:44,159 INFO L225 Difference]: With dead ends: 4676 [2021-11-06 15:39:44,159 INFO L226 Difference]: Without dead ends: 3126 [2021-11-06 15:39:44,162 INFO L786 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 [2021-11-06 15:39:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-11-06 15:39:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3116. [2021-11-06 15:39:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3116 states, 3110 states have (on average 1.4932475884244374) internal successors, (4644), 3115 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3116 states to 3116 states and 4644 transitions. [2021-11-06 15:39:44,217 INFO L78 Accepts]: Start accepts. Automaton has 3116 states and 4644 transitions. Word has length 42 [2021-11-06 15:39:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:39:44,218 INFO L470 AbstractCegarLoop]: Abstraction has 3116 states and 4644 transitions. [2021-11-06 15:39:44,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3116 states and 4644 transitions. [2021-11-06 15:39:44,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-06 15:39:44,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:39:44,226 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:39:44,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 15:39:44,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:39:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:39:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1340666122, now seen corresponding path program 1 times [2021-11-06 15:39:44,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:39:44,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999460439] [2021-11-06 15:39:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:39:44,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:39:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:39:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:39:44,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:39:44,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999460439] [2021-11-06 15:39:44,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999460439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:39:44,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:39:44,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:39:44,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132648609] [2021-11-06 15:39:44,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:39:44,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:39:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:39:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:39:44,373 INFO L87 Difference]: Start difference. First operand 3116 states and 4644 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:39:44,504 INFO L93 Difference]: Finished difference Result 6208 states and 9256 transitions. [2021-11-06 15:39:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:39:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-06 15:39:44,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:39:44,513 INFO L225 Difference]: With dead ends: 6208 [2021-11-06 15:39:44,514 INFO L226 Difference]: Without dead ends: 3125 [2021-11-06 15:39:44,520 INFO L786 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 [2021-11-06 15:39:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-11-06 15:39:44,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 3115. [2021-11-06 15:39:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3109 states have (on average 1.4924412994532004) internal successors, (4640), 3114 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 4640 transitions. [2021-11-06 15:39:44,582 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 4640 transitions. Word has length 46 [2021-11-06 15:39:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:39:44,582 INFO L470 AbstractCegarLoop]: Abstraction has 3115 states and 4640 transitions. [2021-11-06 15:39:44,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 4640 transitions. [2021-11-06 15:39:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-06 15:39:44,584 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:39:44,584 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:39:44,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 15:39:44,584 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:39:44,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:39:44,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1163448145, now seen corresponding path program 1 times [2021-11-06 15:39:44,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:39:44,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249766200] [2021-11-06 15:39:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:39:44,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:39:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:39:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:39:44,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:39:44,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249766200] [2021-11-06 15:39:44,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249766200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:39:44,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:39:44,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:39:44,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15635119] [2021-11-06 15:39:44,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:39:44,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:39:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:39:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:39:44,690 INFO L87 Difference]: Start difference. First operand 3115 states and 4640 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:39:44,757 INFO L93 Difference]: Finished difference Result 5883 states and 8808 transitions. [2021-11-06 15:39:44,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:39:44,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-06 15:39:44,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:39:44,765 INFO L225 Difference]: With dead ends: 5883 [2021-11-06 15:39:44,766 INFO L226 Difference]: Without dead ends: 2801 [2021-11-06 15:39:44,769 INFO L786 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 [2021-11-06 15:39:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-11-06 15:39:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2801. [2021-11-06 15:39:44,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2796 states have (on average 1.5025035765379113) internal successors, (4201), 2800 states have internal predecessors, (4201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 4201 transitions. [2021-11-06 15:39:44,820 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 4201 transitions. Word has length 49 [2021-11-06 15:39:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:39:44,820 INFO L470 AbstractCegarLoop]: Abstraction has 2801 states and 4201 transitions. [2021-11-06 15:39:44,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 4201 transitions. [2021-11-06 15:39:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 15:39:44,821 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:39:44,821 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:39:44,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 15:39:44,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:39:44,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:39:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1670408081, now seen corresponding path program 1 times [2021-11-06 15:39:44,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:39:44,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816740083] [2021-11-06 15:39:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:39:44,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:39:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:39:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 15:39:44,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:39:44,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816740083] [2021-11-06 15:39:44,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816740083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:39:44,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:39:44,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:39:44,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053927922] [2021-11-06 15:39:44,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:39:44,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:39:44,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:39:44,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:39:44,913 INFO L87 Difference]: Start difference. First operand 2801 states and 4201 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:39:45,058 INFO L93 Difference]: Finished difference Result 8327 states and 12524 transitions. [2021-11-06 15:39:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:39:45,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 15:39:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:39:45,075 INFO L225 Difference]: With dead ends: 8327 [2021-11-06 15:39:45,075 INFO L226 Difference]: Without dead ends: 5557 [2021-11-06 15:39:45,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:39:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5557 states. [2021-11-06 15:39:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5557 to 5545. [2021-11-06 15:39:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 5540 states have (on average 1.5052346570397113) internal successors, (8339), 5544 states have internal predecessors, (8339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 8339 transitions. [2021-11-06 15:39:45,213 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 8339 transitions. Word has length 53 [2021-11-06 15:39:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:39:45,215 INFO L470 AbstractCegarLoop]: Abstraction has 5545 states and 8339 transitions. [2021-11-06 15:39:45,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 8339 transitions. [2021-11-06 15:39:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-06 15:39:45,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:39:45,217 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:39:45,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 15:39:45,218 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:39:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:39:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1632205903, now seen corresponding path program 1 times [2021-11-06 15:39:45,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:39:45,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893068136] [2021-11-06 15:39:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:39:45,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:39:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:39:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:39:45,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:39:45,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893068136] [2021-11-06 15:39:45,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893068136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:39:45,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:39:45,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:39:45,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866469229] [2021-11-06 15:39:45,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:39:45,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:39:45,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:39:45,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:39:45,340 INFO L87 Difference]: Start difference. First operand 5545 states and 8339 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:39:45,451 INFO L93 Difference]: Finished difference Result 9907 states and 14908 transitions. [2021-11-06 15:39:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:39:45,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-06 15:39:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:39:45,465 INFO L225 Difference]: With dead ends: 9907 [2021-11-06 15:39:45,465 INFO L226 Difference]: Without dead ends: 4395 [2021-11-06 15:39:45,473 INFO L786 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 [2021-11-06 15:39:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2021-11-06 15:39:45,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 4385. [2021-11-06 15:39:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4385 states, 4380 states have (on average 1.5050228310502283) internal successors, (6592), 4384 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4385 states to 4385 states and 6592 transitions. [2021-11-06 15:39:45,614 INFO L78 Accepts]: Start accepts. Automaton has 4385 states and 6592 transitions. Word has length 63 [2021-11-06 15:39:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:39:45,614 INFO L470 AbstractCegarLoop]: Abstraction has 4385 states and 6592 transitions. [2021-11-06 15:39:45,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:39:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4385 states and 6592 transitions. [2021-11-06 15:39:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 15:39:45,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:39:45,619 INFO L513 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] [2021-11-06 15:39:45,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 15:39:45,620 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:39:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:39:45,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1272537246, now seen corresponding path program 1 times [2021-11-06 15:39:45,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:39:45,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804498790] [2021-11-06 15:39:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:39:45,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:39:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:39:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:39:45,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:39:45,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804498790] [2021-11-06 15:39:45,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804498790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:39:45,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:39:45,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:39:45,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370702288] [2021-11-06 15:39:45,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:39:45,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:39:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:39:45,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:39:45,767 INFO L87 Difference]: Start difference. First operand 4385 states and 6592 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:02,252 INFO L93 Difference]: Finished difference Result 8271 states and 12431 transitions. [2021-11-06 15:40:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:40:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-06 15:40:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:02,278 INFO L225 Difference]: With dead ends: 8271 [2021-11-06 15:40:02,278 INFO L226 Difference]: Without dead ends: 4447 [2021-11-06 15:40:02,285 INFO L786 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 [2021-11-06 15:40:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4447 states. [2021-11-06 15:40:02,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4447 to 4389. [2021-11-06 15:40:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 4384 states have (on average 1.5045620437956204) internal successors, (6596), 4388 states have internal predecessors, (6596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 6596 transitions. [2021-11-06 15:40:02,373 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 6596 transitions. Word has length 74 [2021-11-06 15:40:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:02,374 INFO L470 AbstractCegarLoop]: Abstraction has 4389 states and 6596 transitions. [2021-11-06 15:40:02,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 6596 transitions. [2021-11-06 15:40:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 15:40:02,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:02,377 INFO L513 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, 1, 1] [2021-11-06 15:40:02,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 15:40:02,377 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:40:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:02,377 INFO L85 PathProgramCache]: Analyzing trace with hash 510540193, now seen corresponding path program 1 times [2021-11-06 15:40:02,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:02,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496328254] [2021-11-06 15:40:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:02,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:40:02,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:02,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496328254] [2021-11-06 15:40:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496328254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:02,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:02,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 15:40:02,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721187732] [2021-11-06 15:40:02,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 15:40:02,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:02,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 15:40:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:40:02,577 INFO L87 Difference]: Start difference. First operand 4389 states and 6596 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:45,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:45,387 INFO L93 Difference]: Finished difference Result 18133 states and 27294 transitions. [2021-11-06 15:40:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 15:40:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-06 15:40:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:45,423 INFO L225 Difference]: With dead ends: 18133 [2021-11-06 15:40:45,423 INFO L226 Difference]: Without dead ends: 14305 [2021-11-06 15:40:45,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-06 15:40:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14305 states. [2021-11-06 15:40:45,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14305 to 4393. [2021-11-06 15:40:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 4388 states have (on average 1.504102096627165) internal successors, (6600), 4392 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 6600 transitions. [2021-11-06 15:40:45,592 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 6600 transitions. Word has length 77 [2021-11-06 15:40:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:45,593 INFO L470 AbstractCegarLoop]: Abstraction has 4393 states and 6600 transitions. [2021-11-06 15:40:45,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 6600 transitions. [2021-11-06 15:40:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 15:40:45,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:45,595 INFO L513 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, 1, 1] [2021-11-06 15:40:45,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 15:40:45,595 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:40:45,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:45,596 INFO L85 PathProgramCache]: Analyzing trace with hash -337844584, now seen corresponding path program 1 times [2021-11-06 15:40:45,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:45,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767139278] [2021-11-06 15:40:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:45,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:40:45,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:45,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767139278] [2021-11-06 15:40:45,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767139278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:45,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:45,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 15:40:45,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444729700] [2021-11-06 15:40:45,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:40:45,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:40:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:40:45,783 INFO L87 Difference]: Start difference. First operand 4393 states and 6600 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:46,964 INFO L93 Difference]: Finished difference Result 27029 states and 40638 transitions. [2021-11-06 15:40:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 15:40:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-06 15:40:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:47,015 INFO L225 Difference]: With dead ends: 27029 [2021-11-06 15:40:47,016 INFO L226 Difference]: Without dead ends: 23197 [2021-11-06 15:40:47,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:40:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23197 states. [2021-11-06 15:40:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23197 to 4399. [2021-11-06 15:40:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4394 states have (on average 1.5034137460172963) internal successors, (6606), 4398 states have internal predecessors, (6606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 6606 transitions. [2021-11-06 15:40:47,268 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 6606 transitions. Word has length 77 [2021-11-06 15:40:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:47,269 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 6606 transitions. [2021-11-06 15:40:47,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 6606 transitions. [2021-11-06 15:40:47,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 15:40:47,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:47,274 INFO L513 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, 1, 1, 1, 1] [2021-11-06 15:40:47,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 15:40:47,274 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:40:47,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:47,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1910819619, now seen corresponding path program 1 times [2021-11-06 15:40:47,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:47,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652557301] [2021-11-06 15:40:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:47,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:40:47,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:47,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652557301] [2021-11-06 15:40:47,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652557301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:47,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:47,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:40:47,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160957720] [2021-11-06 15:40:47,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:47,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:47,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:47,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:40:47,432 INFO L87 Difference]: Start difference. First operand 4399 states and 6606 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:47,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:47,731 INFO L93 Difference]: Finished difference Result 8789 states and 13221 transitions. [2021-11-06 15:40:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:47,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 15:40:47,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:47,738 INFO L225 Difference]: With dead ends: 8789 [2021-11-06 15:40:47,738 INFO L226 Difference]: Without dead ends: 4418 [2021-11-06 15:40:47,742 INFO L786 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 [2021-11-06 15:40:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4418 states. [2021-11-06 15:40:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4418 to 4418. [2021-11-06 15:40:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 4413 states have (on average 1.5012463176977113) internal successors, (6625), 4417 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 6625 transitions. [2021-11-06 15:40:47,850 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 6625 transitions. Word has length 79 [2021-11-06 15:40:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:47,850 INFO L470 AbstractCegarLoop]: Abstraction has 4418 states and 6625 transitions. [2021-11-06 15:40:47,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:40:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 6625 transitions. [2021-11-06 15:40:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-06 15:40:47,852 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:47,852 INFO L513 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, 1, 1, 1, 1, 1] [2021-11-06 15:40:47,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 15:40:47,853 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:40:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:47,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2022075563, now seen corresponding path program 1 times [2021-11-06 15:40:47,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:47,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198326663] [2021-11-06 15:40:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:47,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:40:48,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:48,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198326663] [2021-11-06 15:40:48,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198326663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:48,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885976428] [2021-11-06 15:40:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:48,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:48,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:40:48,045 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:40:48,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 15:40:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1912 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 15:40:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:40:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:40:48,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885976428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:48,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:40:48,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-06 15:40:48,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933599213] [2021-11-06 15:40:48,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 15:40:48,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 15:40:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:40:48,888 INFO L87 Difference]: Start difference. First operand 4418 states and 6625 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:41:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:41:14,163 INFO L93 Difference]: Finished difference Result 10817 states and 16051 transitions. [2021-11-06 15:41:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 15:41:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-06 15:41:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:41:14,174 INFO L225 Difference]: With dead ends: 10817 [2021-11-06 15:41:14,174 INFO L226 Difference]: Without dead ends: 6428 [2021-11-06 15:41:14,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:41:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6428 states. [2021-11-06 15:41:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6428 to 4438. [2021-11-06 15:41:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4438 states, 4433 states have (on average 1.4989848860816604) internal successors, (6645), 4437 states have internal predecessors, (6645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:41:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 6645 transitions. [2021-11-06 15:41:14,315 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 6645 transitions. Word has length 80 [2021-11-06 15:41:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:41:14,315 INFO L470 AbstractCegarLoop]: Abstraction has 4438 states and 6645 transitions. [2021-11-06 15:41:14,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:41:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 6645 transitions. [2021-11-06 15:41:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-06 15:41:14,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:41:14,318 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:41:14,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 15:41:14,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-06 15:41:14,532 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:41:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:41:14,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1727328237, now seen corresponding path program 1 times [2021-11-06 15:41:14,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:41:14,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629304146] [2021-11-06 15:41:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:41:14,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:41:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:41:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 15:41:14,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:41:14,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629304146] [2021-11-06 15:41:14,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629304146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:41:14,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242982982] [2021-11-06 15:41:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:41:14,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:41:14,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:41:14,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:41:14,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 15:41:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:41:15,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 15:41:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:41:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 15:41:15,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242982982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:41:15,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:41:15,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 15:41:15,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681827132] [2021-11-06 15:41:15,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 15:41:15,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:41:15,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 15:41:15,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:41:15,719 INFO L87 Difference]: Start difference. First operand 4438 states and 6645 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:41:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:41:40,923 INFO L93 Difference]: Finished difference Result 8865 states and 13297 transitions. [2021-11-06 15:41:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:41:40,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-06 15:41:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:41:40,931 INFO L225 Difference]: With dead ends: 8865 [2021-11-06 15:41:40,931 INFO L226 Difference]: Without dead ends: 4457 [2021-11-06 15:41:40,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:41:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2021-11-06 15:41:41,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 4457. [2021-11-06 15:41:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4452 states have (on average 1.4968553459119496) internal successors, (6664), 4456 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:41:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 6664 transitions. [2021-11-06 15:41:41,055 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 6664 transitions. Word has length 82 [2021-11-06 15:41:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:41:41,056 INFO L470 AbstractCegarLoop]: Abstraction has 4457 states and 6664 transitions. [2021-11-06 15:41:41,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:41:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 6664 transitions. [2021-11-06 15:41:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 15:41:41,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:41:41,058 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-06 15:41:41,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 15:41:41,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-06 15:41:41,284 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:41:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:41:41,285 INFO L85 PathProgramCache]: Analyzing trace with hash -438403429, now seen corresponding path program 2 times [2021-11-06 15:41:41,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:41:41,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878148196] [2021-11-06 15:41:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:41:41,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:41:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:41:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 15:41:41,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:41:41,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878148196] [2021-11-06 15:41:41,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878148196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:41:41,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27289402] [2021-11-06 15:41:41,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:41:41,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:41:41,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:41:41,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:41:41,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 15:41:42,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 15:41:42,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:41:42,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1930 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 15:41:42,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:41:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 15:41:42,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27289402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:41:42,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:41:42,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-06 15:41:42,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238210018] [2021-11-06 15:41:42,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 15:41:42,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:41:42,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 15:41:42,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:41:42,945 INFO L87 Difference]: Start difference. First operand 4457 states and 6664 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:43:35,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:43:35,204 INFO L93 Difference]: Finished difference Result 12883 states and 18918 transitions. [2021-11-06 15:43:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 15:43:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-06 15:43:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:43:35,216 INFO L225 Difference]: With dead ends: 12883 [2021-11-06 15:43:35,216 INFO L226 Difference]: Without dead ends: 8457 [2021-11-06 15:43:35,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:43:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8457 states. [2021-11-06 15:43:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8457 to 4477. [2021-11-06 15:43:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4472 states have (on average 1.4946332737030412) internal successors, (6684), 4476 states have internal predecessors, (6684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:43:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 6684 transitions. [2021-11-06 15:43:35,446 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 6684 transitions. Word has length 83 [2021-11-06 15:43:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:43:35,446 INFO L470 AbstractCegarLoop]: Abstraction has 4477 states and 6684 transitions. [2021-11-06 15:43:35,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:43:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 6684 transitions. [2021-11-06 15:43:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-06 15:43:35,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:43:35,449 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-06 15:43:35,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 15:43:35,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:43:35,659 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:43:35,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:43:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1370806685, now seen corresponding path program 3 times [2021-11-06 15:43:35,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:43:35,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506848228] [2021-11-06 15:43:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:43:35,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:43:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:43:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 15:43:35,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:43:35,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506848228] [2021-11-06 15:43:35,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506848228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:43:35,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926439156] [2021-11-06 15:43:35,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 15:43:35,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:43:35,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:43:35,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:43:35,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 15:43:37,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 15:43:37,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:43:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1930 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 15:43:37,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:43:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 15:43:37,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926439156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:43:37,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:43:37,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-11-06 15:43:37,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132942391] [2021-11-06 15:43:37,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 15:43:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:43:37,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 15:43:37,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:43:37,568 INFO L87 Difference]: Start difference. First operand 4477 states and 6684 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:44:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:44:52,866 INFO L93 Difference]: Finished difference Result 8942 states and 13375 transitions. [2021-11-06 15:44:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 15:44:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-06 15:44:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:44:52,872 INFO L225 Difference]: With dead ends: 8942 [2021-11-06 15:44:52,872 INFO L226 Difference]: Without dead ends: 4497 [2021-11-06 15:44:52,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:44:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2021-11-06 15:44:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 4497. [2021-11-06 15:44:53,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4497 states, 4492 states have (on average 1.4924309884238647) internal successors, (6704), 4496 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:44:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 6704 transitions. [2021-11-06 15:44:53,014 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 6704 transitions. Word has length 85 [2021-11-06 15:44:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:44:53,015 INFO L470 AbstractCegarLoop]: Abstraction has 4497 states and 6704 transitions. [2021-11-06 15:44:53,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:44:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 6704 transitions. [2021-11-06 15:44:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-06 15:44:53,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:44:53,017 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 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] [2021-11-06 15:44:53,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 15:44:53,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:44:53,235 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:44:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:44:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1142891301, now seen corresponding path program 4 times [2021-11-06 15:44:53,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:44:53,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947019016] [2021-11-06 15:44:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:44:53,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:44:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:44:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 15:44:53,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:44:53,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947019016] [2021-11-06 15:44:53,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947019016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:44:53,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888457473] [2021-11-06 15:44:53,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 15:44:53,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:44:53,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:44:53,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:44:53,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 15:44:54,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 15:44:54,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:44:54,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-06 15:44:54,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:44:54,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 15:44:54,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888457473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:44:54,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:44:54,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-11-06 15:44:54,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528529227] [2021-11-06 15:44:54,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 15:44:54,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:44:54,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 15:44:54,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-06 15:44:54,774 INFO L87 Difference]: Start difference. First operand 4497 states and 6704 transitions. Second operand has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:52:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:52:10,482 INFO L93 Difference]: Finished difference Result 16941 states and 24578 transitions. [2021-11-06 15:52:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 15:52:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-06 15:52:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:52:10,500 INFO L225 Difference]: With dead ends: 16941 [2021-11-06 15:52:10,500 INFO L226 Difference]: Without dead ends: 12477 [2021-11-06 15:52:10,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-06 15:52:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12477 states. [2021-11-06 15:52:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12477 to 4517. [2021-11-06 15:52:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4517 states, 4512 states have (on average 1.4902482269503545) internal successors, (6724), 4516 states have internal predecessors, (6724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:52:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4517 states to 4517 states and 6724 transitions. [2021-11-06 15:52:10,717 INFO L78 Accepts]: Start accepts. Automaton has 4517 states and 6724 transitions. Word has length 87 [2021-11-06 15:52:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:52:10,717 INFO L470 AbstractCegarLoop]: Abstraction has 4517 states and 6724 transitions. [2021-11-06 15:52:10,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:52:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4517 states and 6724 transitions. [2021-11-06 15:52:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 15:52:10,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:52:10,721 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 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] [2021-11-06 15:52:10,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 15:52:10,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-06 15:52:10,928 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:52:10,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:52:10,928 INFO L85 PathProgramCache]: Analyzing trace with hash 10796893, now seen corresponding path program 5 times [2021-11-06 15:52:10,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:52:10,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280037157] [2021-11-06 15:52:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:52:10,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:52:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:52:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 15:52:11,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:52:11,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280037157] [2021-11-06 15:52:11,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280037157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:52:11,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028080852] [2021-11-06 15:52:11,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 15:52:11,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:52:11,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:52:11,292 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:52:11,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 15:52:13,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-06 15:52:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:52:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-06 15:52:13,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:52:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 15:52:13,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028080852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:52:13,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:52:13,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-06 15:52:13,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316428410] [2021-11-06 15:52:13,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 15:52:13,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:52:13,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 15:52:13,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:52:13,706 INFO L87 Difference]: Start difference. First operand 4517 states and 6724 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:53:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:53:03,806 INFO L93 Difference]: Finished difference Result 9001 states and 13415 transitions. [2021-11-06 15:53:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 15:53:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-06 15:53:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:53:03,812 INFO L225 Difference]: With dead ends: 9001 [2021-11-06 15:53:03,812 INFO L226 Difference]: Without dead ends: 4518 [2021-11-06 15:53:03,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:53:03,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-11-06 15:53:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 4518. [2021-11-06 15:53:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4518 states, 4513 states have (on average 1.490139596720585) internal successors, (6725), 4517 states have internal predecessors, (6725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:53:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4518 states to 4518 states and 6725 transitions. [2021-11-06 15:53:03,957 INFO L78 Accepts]: Start accepts. Automaton has 4518 states and 6725 transitions. Word has length 89 [2021-11-06 15:53:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:53:03,957 INFO L470 AbstractCegarLoop]: Abstraction has 4518 states and 6725 transitions. [2021-11-06 15:53:03,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:53:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4518 states and 6725 transitions. [2021-11-06 15:53:03,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 15:53:03,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:53:03,963 INFO L513 BasicCegarLoop]: trace histogram [7, 4, 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] [2021-11-06 15:53:03,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 15:53:04,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-06 15:53:04,174 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 15:53:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:53:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash 559507413, now seen corresponding path program 6 times [2021-11-06 15:53:04,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:53:04,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982487338] [2021-11-06 15:53:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:53:04,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:53:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:53:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 15:53:04,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:53:04,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982487338] [2021-11-06 15:53:04,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982487338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:53:04,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461872835] [2021-11-06 15:53:04,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-06 15:53:04,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:53:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:53:04,654 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:53:04,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 15:53:09,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-06 15:53:09,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:53:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 1972 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-06 15:53:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:53:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 15:53:10,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461872835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:53:10,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:53:10,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-11-06 15:53:10,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26474453] [2021-11-06 15:53:10,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 15:53:10,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:53:10,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 15:53:10,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-06 15:53:10,032 INFO L87 Difference]: Start difference. First operand 4518 states and 6725 transitions. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15