./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f 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-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i -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 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 13:04:41,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 13:04:41,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 13:04:41,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 13:04:41,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 13:04:41,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 13:04:41,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 13:04:41,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 13:04:41,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 13:04:41,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 13:04:41,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 13:04:41,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 13:04:41,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 13:04:41,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 13:04:41,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 13:04:41,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 13:04:41,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 13:04:41,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 13:04:41,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 13:04:41,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 13:04:41,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 13:04:41,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 13:04:41,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 13:04:41,797 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 13:04:41,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 13:04:41,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 13:04:41,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 13:04:41,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 13:04:41,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 13:04:41,804 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 13:04:41,804 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 13:04:41,805 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 13:04:41,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 13:04:41,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 13:04:41,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 13:04:41,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 13:04:41,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 13:04:41,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 13:04:41,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 13:04:41,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 13:04:41,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 13:04:41,811 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 13:04:41,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 13:04:41,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 13:04:41,848 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 13:04:41,848 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 13:04:41,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 13:04:41,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 13:04:41,850 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 13:04:41,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 13:04:41,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 13:04:41,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 13:04:41,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 13:04:41,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 13:04:41,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 13:04:41,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 13:04:41,852 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 13:04:41,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 13:04:41,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 13:04:41,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 13:04:41,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 13:04:41,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:04:41,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 13:04:41,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 13:04:41,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 13:04:41,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 13:04:41,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 13:04:41,854 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 13:04:41,854 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 13:04:41,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 13:04:41,856 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 13:04:41,856 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 549c0f0e85f506f59a54b746c0743ded562d36f784f1b0fcb4bf7d5e1672332d [2021-11-07 13:04:42,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 13:04:42,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 13:04:42,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 13:04:42,097 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 13:04:42,098 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 13:04:42,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-07 13:04:42,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef4b527/53fc3ea69e4545c0a9b958bb79c975f6/FLAG55fb7801d [2021-11-07 13:04:42,843 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 13:04:42,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-07 13:04:42,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef4b527/53fc3ea69e4545c0a9b958bb79c975f6/FLAG55fb7801d [2021-11-07 13:04:43,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98ef4b527/53fc3ea69e4545c0a9b958bb79c975f6 [2021-11-07 13:04:43,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 13:04:43,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 13:04:43,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 13:04:43,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 13:04:43,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 13:04:43,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:43" (1/1) ... [2021-11-07 13:04:43,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1145b0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:43, skipping insertion in model container [2021-11-07 13:04:43,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:43" (1/1) ... [2021-11-07 13:04:43,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 13:04:43,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 13:04:43,984 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-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2021-11-07 13:04:44,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:04:44,621 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 13:04:44,730 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-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i[160575,160588] [2021-11-07 13:04:44,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:04:44,977 INFO L208 MainTranslator]: Completed translation [2021-11-07 13:04:44,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44 WrapperNode [2021-11-07 13:04:44,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 13:04:44,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 13:04:44,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 13:04:44,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 13:04:44,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 13:04:45,246 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 13:04:45,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 13:04:45,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 13:04:45,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 13:04:45,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 13:04:45,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 13:04:45,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 13:04:45,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (1/1) ... [2021-11-07 13:04:45,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:04:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:04:45,561 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) [2021-11-07 13:04:45,582 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 [2021-11-07 13:04:45,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 13:04:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 13:04:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 13:04:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 13:04:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 13:04:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 13:04:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 13:04:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 13:04:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 13:04:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 13:04:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 13:04:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 13:04:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 13:04:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 13:04:45,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 13:04:50,873 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 13:04:50,873 INFO L299 CfgBuilder]: Removed 1046 assume(true) statements. [2021-11-07 13:04:50,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:50 BoogieIcfgContainer [2021-11-07 13:04:50,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 13:04:50,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 13:04:50,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 13:04:50,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 13:04:50,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:04:43" (1/3) ... [2021-11-07 13:04:50,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f777bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:50, skipping insertion in model container [2021-11-07 13:04:50,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:44" (2/3) ... [2021-11-07 13:04:50,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f777bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:50, skipping insertion in model container [2021-11-07 13:04:50,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:50" (3/3) ... [2021-11-07 13:04:50,885 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--rtl8150.ko-entry_point.cil.out.i [2021-11-07 13:04:50,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 13:04:50,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 13:04:50,932 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 13:04:50,938 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 [2021-11-07 13:04:50,938 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 13:04:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 914 states, 912 states have (on average 1.3826754385964912) internal successors, (1261), 913 states have internal predecessors, (1261), 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) [2021-11-07 13:04:50,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 13:04:50,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:50,984 INFO L514 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] [2021-11-07 13:04:50,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:50,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1648518912, now seen corresponding path program 1 times [2021-11-07 13:04:50,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:50,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32592428] [2021-11-07 13:04:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:50,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:04:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:04:51,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:04:51,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32592428] [2021-11-07 13:04:51,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32592428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:04:51,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:04:51,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:04:51,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490507346] [2021-11-07 13:04:51,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:04:51,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:04:51,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:04:51,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:04:51,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:04:51,487 INFO L87 Difference]: Start difference. First operand has 914 states, 912 states have (on average 1.3826754385964912) internal successors, (1261), 913 states have internal predecessors, (1261), 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 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-11-07 13:04:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:04:52,286 INFO L93 Difference]: Finished difference Result 2676 states and 3697 transitions. [2021-11-07 13:04:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:04:52,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2021-11-07 13:04:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:04:52,306 INFO L225 Difference]: With dead ends: 2676 [2021-11-07 13:04:52,306 INFO L226 Difference]: Without dead ends: 1753 [2021-11-07 13:04:52,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.86ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:04:52,315 INFO L933 BasicCegarLoop]: 1210 mSDtfsCounter, 1145 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 632.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.36ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 685.17ms IncrementalHoareTripleChecker+Time [2021-11-07 13:04:52,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 2401 Invalid, 15 Unknown, 0 Unchecked, 13.36ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 685.17ms Time] [2021-11-07 13:04:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-11-07 13:04:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1753. [2021-11-07 13:04:52,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 1.3293378995433789) internal successors, (2329), 1752 states have internal predecessors, (2329), 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) [2021-11-07 13:04:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2329 transitions. [2021-11-07 13:04:52,427 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2329 transitions. Word has length 29 [2021-11-07 13:04:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:04:52,429 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 2329 transitions. [2021-11-07 13:04:52,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-11-07 13:04:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2329 transitions. [2021-11-07 13:04:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 13:04:52,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:52,437 INFO L514 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] [2021-11-07 13:04:52,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 13:04:52,438 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:52,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1054602339, now seen corresponding path program 1 times [2021-11-07 13:04:52,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:52,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949059228] [2021-11-07 13:04:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:52,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:04:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:04:52,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:04:52,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949059228] [2021-11-07 13:04:52,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949059228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:04:52,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:04:52,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:04:52,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721500366] [2021-11-07 13:04:52,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:04:52,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:04:52,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:04:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:04:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:04:52,731 INFO L87 Difference]: Start difference. First operand 1753 states and 2329 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-11-07 13:04:52,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:04:52,977 INFO L93 Difference]: Finished difference Result 5187 states and 6902 transitions. [2021-11-07 13:04:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:04:52,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 36 [2021-11-07 13:04:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:04:52,995 INFO L225 Difference]: With dead ends: 5187 [2021-11-07 13:04:52,995 INFO L226 Difference]: Without dead ends: 3464 [2021-11-07 13:04:52,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.92ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:04:53,000 INFO L933 BasicCegarLoop]: 1165 mSDtfsCounter, 1170 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 4616 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.38ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.77ms IncrementalHoareTripleChecker+Time [2021-11-07 13:04:53,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1170 Valid, 4616 Invalid, 143 Unknown, 0 Unchecked, 8.38ms Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 129.77ms Time] [2021-11-07 13:04:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-07 13:04:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3416. [2021-11-07 13:04:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 1.3308931185944364) internal successors, (4545), 3415 states have internal predecessors, (4545), 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) [2021-11-07 13:04:53,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4545 transitions. [2021-11-07 13:04:53,107 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4545 transitions. Word has length 36 [2021-11-07 13:04:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:04:53,107 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 4545 transitions. [2021-11-07 13:04:53,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-11-07 13:04:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4545 transitions. [2021-11-07 13:04:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 13:04:53,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:53,116 INFO L514 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] [2021-11-07 13:04:53,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 13:04:53,117 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:53,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2040257624, now seen corresponding path program 1 times [2021-11-07 13:04:53,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:53,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729872788] [2021-11-07 13:04:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:53,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:04:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:04:53,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:04:53,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729872788] [2021-11-07 13:04:53,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729872788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:04:53,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:04:53,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:04:53,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474604284] [2021-11-07 13:04:53,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:04:53,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:04:53,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:04:53,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:04:53,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:04:53,226 INFO L87 Difference]: Start difference. First operand 3416 states and 4545 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-07 13:04:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:04:53,405 INFO L93 Difference]: Finished difference Result 8837 states and 11752 transitions. [2021-11-07 13:04:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:04:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 [2021-11-07 13:04:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:04:53,427 INFO L225 Difference]: With dead ends: 8837 [2021-11-07 13:04:53,428 INFO L226 Difference]: Without dead ends: 5456 [2021-11-07 13:04:53,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.81ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:04:53,436 INFO L933 BasicCegarLoop]: 1202 mSDtfsCounter, 718 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 2336 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.89ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.44ms IncrementalHoareTripleChecker+Time [2021-11-07 13:04:53,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 2336 Invalid, 24 Unknown, 0 Unchecked, 3.89ms Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 51.44ms Time] [2021-11-07 13:04:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2021-11-07 13:04:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 5446. [2021-11-07 13:04:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5446 states, 5445 states have (on average 1.3289256198347108) internal successors, (7236), 5445 states have internal predecessors, (7236), 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) [2021-11-07 13:04:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5446 states to 5446 states and 7236 transitions. [2021-11-07 13:04:53,651 INFO L78 Accepts]: Start accepts. Automaton has 5446 states and 7236 transitions. Word has length 74 [2021-11-07 13:04:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:04:53,651 INFO L470 AbstractCegarLoop]: Abstraction has 5446 states and 7236 transitions. [2021-11-07 13:04:53,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-07 13:04:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5446 states and 7236 transitions. [2021-11-07 13:04:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 13:04:53,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:53,660 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:04:53,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 13:04:53,661 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:53,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1011975024, now seen corresponding path program 1 times [2021-11-07 13:04:53,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:53,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405307327] [2021-11-07 13:04:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:53,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:04:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:04:53,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:04:53,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405307327] [2021-11-07 13:04:53,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405307327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:04:53,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:04:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:04:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127035760] [2021-11-07 13:04:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:04:53,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:04:53,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:04:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:04:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:04:53,857 INFO L87 Difference]: Start difference. First operand 5446 states and 7236 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2021-11-07 13:04:54,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:04:54,717 INFO L93 Difference]: Finished difference Result 12949 states and 17230 transitions. [2021-11-07 13:04:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:04:54,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-07 13:04:54,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:04:54,749 INFO L225 Difference]: With dead ends: 12949 [2021-11-07 13:04:54,749 INFO L226 Difference]: Without dead ends: 7538 [2021-11-07 13:04:54,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.15ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:04:54,762 INFO L933 BasicCegarLoop]: 1868 mSDtfsCounter, 860 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 617.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2865 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.86ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 678.44ms IncrementalHoareTripleChecker+Time [2021-11-07 13:04:54,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 2865 Invalid, 36 Unknown, 0 Unchecked, 3.86ms Time], IncrementalHoareTripleChecker [9 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 678.44ms Time] [2021-11-07 13:04:54,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-11-07 13:04:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 7528. [2021-11-07 13:04:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7528 states, 7527 states have (on average 1.328417696293344) internal successors, (9999), 7527 states have internal predecessors, (9999), 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) [2021-11-07 13:04:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 9999 transitions. [2021-11-07 13:04:55,046 INFO L78 Accepts]: Start accepts. Automaton has 7528 states and 9999 transitions. Word has length 84 [2021-11-07 13:04:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:04:55,047 INFO L470 AbstractCegarLoop]: Abstraction has 7528 states and 9999 transitions. [2021-11-07 13:04:55,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2021-11-07 13:04:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7528 states and 9999 transitions. [2021-11-07 13:04:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 13:04:55,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:55,057 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:04:55,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 13:04:55,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1341541353, now seen corresponding path program 1 times [2021-11-07 13:04:55,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:55,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278044939] [2021-11-07 13:04:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:55,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:04:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:04:55,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:04:55,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278044939] [2021-11-07 13:04:55,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278044939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:04:55,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:04:55,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:04:55,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968455180] [2021-11-07 13:04:55,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:04:55,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:04:55,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:04:55,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:04:55,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:04:55,164 INFO L87 Difference]: Start difference. First operand 7528 states and 9999 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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) [2021-11-07 13:04:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:04:56,455 INFO L93 Difference]: Finished difference Result 17642 states and 23405 transitions. [2021-11-07 13:04:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:04:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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) Word has length 96 [2021-11-07 13:04:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:04:56,503 INFO L225 Difference]: With dead ends: 17642 [2021-11-07 13:04:56,504 INFO L226 Difference]: Without dead ends: 10149 [2021-11-07 13:04:56,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.17ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:04:56,522 INFO L933 BasicCegarLoop]: 2073 mSDtfsCounter, 1597 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 916.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 4614 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 983.37ms IncrementalHoareTripleChecker+Time [2021-11-07 13:04:56,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 4614 Invalid, 17 Unknown, 0 Unchecked, 6.74ms Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 983.37ms Time] [2021-11-07 13:04:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10149 states. [2021-11-07 13:04:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10149 to 7536. [2021-11-07 13:04:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7536 states, 7535 states have (on average 1.32806901128069) internal successors, (10007), 7535 states have internal predecessors, (10007), 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) [2021-11-07 13:04:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7536 states to 7536 states and 10007 transitions. [2021-11-07 13:04:56,835 INFO L78 Accepts]: Start accepts. Automaton has 7536 states and 10007 transitions. Word has length 96 [2021-11-07 13:04:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:04:56,835 INFO L470 AbstractCegarLoop]: Abstraction has 7536 states and 10007 transitions. [2021-11-07 13:04:56,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 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) [2021-11-07 13:04:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 7536 states and 10007 transitions. [2021-11-07 13:04:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 13:04:56,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:56,846 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:04:56,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 13:04:56,847 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash -72857761, now seen corresponding path program 1 times [2021-11-07 13:04:56,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:56,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511957698] [2021-11-07 13:04:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:56,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:04:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:04:56,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:04:56,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511957698] [2021-11-07 13:04:56,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511957698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:04:56,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:04:56,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:04:56,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456770467] [2021-11-07 13:04:56,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:04:56,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:04:56,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:04:56,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:04:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:04:56,975 INFO L87 Difference]: Start difference. First operand 7536 states and 10007 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2021-11-07 13:04:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:04:57,613 INFO L93 Difference]: Finished difference Result 31316 states and 41615 transitions. [2021-11-07 13:04:57,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:04:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 114 [2021-11-07 13:04:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:04:57,683 INFO L225 Difference]: With dead ends: 31316 [2021-11-07 13:04:57,684 INFO L226 Difference]: Without dead ends: 23815 [2021-11-07 13:04:57,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.19ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:04:57,713 INFO L933 BasicCegarLoop]: 1935 mSDtfsCounter, 3757 mSDsluCounter, 3854 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3757 SdHoareTripleChecker+Valid, 5789 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.51ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.66ms IncrementalHoareTripleChecker+Time [2021-11-07 13:04:57,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3757 Valid, 5789 Invalid, 13 Unknown, 0 Unchecked, 14.51ms Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 110.66ms Time] [2021-11-07 13:04:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23815 states. [2021-11-07 13:04:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23815 to 7544. [2021-11-07 13:04:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 1.3277210658889036) internal successors, (10015), 7543 states have internal predecessors, (10015), 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) [2021-11-07 13:04:58,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 10015 transitions. [2021-11-07 13:04:58,124 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 10015 transitions. Word has length 114 [2021-11-07 13:04:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:04:58,124 INFO L470 AbstractCegarLoop]: Abstraction has 7544 states and 10015 transitions. [2021-11-07 13:04:58,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2021-11-07 13:04:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 10015 transitions. [2021-11-07 13:04:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 13:04:58,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:58,135 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:04:58,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 13:04:58,136 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:58,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:58,136 INFO L85 PathProgramCache]: Analyzing trace with hash 528150739, now seen corresponding path program 1 times [2021-11-07 13:04:58,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:58,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931417739] [2021-11-07 13:04:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:58,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:04:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:04:58,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:04:58,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931417739] [2021-11-07 13:04:58,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931417739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:04:58,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:04:58,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:04:58,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118389781] [2021-11-07 13:04:58,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:04:58,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:04:58,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:04:58,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:04:58,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:04:58,259 INFO L87 Difference]: Start difference. First operand 7544 states and 10015 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2021-11-07 13:04:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:04:59,066 INFO L93 Difference]: Finished difference Result 17686 states and 23449 transitions. [2021-11-07 13:04:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:04:59,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 115 [2021-11-07 13:04:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:04:59,089 INFO L225 Difference]: With dead ends: 17686 [2021-11-07 13:04:59,090 INFO L226 Difference]: Without dead ends: 10177 [2021-11-07 13:04:59,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.62ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:04:59,108 INFO L933 BasicCegarLoop]: 2073 mSDtfsCounter, 1597 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 423.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1597 SdHoareTripleChecker+Valid, 4614 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 470.20ms IncrementalHoareTripleChecker+Time [2021-11-07 13:04:59,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1597 Valid, 4614 Invalid, 16 Unknown, 0 Unchecked, 5.37ms Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 470.20ms Time] [2021-11-07 13:04:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10177 states. [2021-11-07 13:04:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10177 to 7544. [2021-11-07 13:04:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 1.3277210658889036) internal successors, (10015), 7543 states have internal predecessors, (10015), 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) [2021-11-07 13:04:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 10015 transitions. [2021-11-07 13:04:59,361 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 10015 transitions. Word has length 115 [2021-11-07 13:04:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:04:59,362 INFO L470 AbstractCegarLoop]: Abstraction has 7544 states and 10015 transitions. [2021-11-07 13:04:59,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2021-11-07 13:04:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 10015 transitions. [2021-11-07 13:04:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 13:04:59,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:04:59,371 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:04:59,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 13:04:59,372 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:04:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:04:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1387417399, now seen corresponding path program 1 times [2021-11-07 13:04:59,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:04:59,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885291226] [2021-11-07 13:04:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:04:59,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:04:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:04:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:04:59,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:04:59,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885291226] [2021-11-07 13:04:59,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885291226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:04:59,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:04:59,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:04:59,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566063571] [2021-11-07 13:04:59,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:04:59,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:04:59,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:04:59,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:04:59,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:04:59,545 INFO L87 Difference]: Start difference. First operand 7544 states and 10015 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2021-11-07 13:05:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:00,588 INFO L93 Difference]: Finished difference Result 37373 states and 49631 transitions. [2021-11-07 13:05:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:05:00,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 122 [2021-11-07 13:05:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:00,661 INFO L225 Difference]: With dead ends: 37373 [2021-11-07 13:05:00,661 INFO L226 Difference]: Without dead ends: 29864 [2021-11-07 13:05:00,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.28ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:00,680 INFO L933 BasicCegarLoop]: 2320 mSDtfsCounter, 3392 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 5791 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.64ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.64ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:00,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3392 Valid, 5791 Invalid, 73 Unknown, 0 Unchecked, 11.64ms Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 68.64ms Time] [2021-11-07 13:05:00,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29864 states. [2021-11-07 13:05:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29864 to 7552. [2021-11-07 13:05:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7552 states, 7551 states have (on average 1.3273738577671832) internal successors, (10023), 7551 states have internal predecessors, (10023), 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) [2021-11-07 13:05:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7552 states to 7552 states and 10023 transitions. [2021-11-07 13:05:01,041 INFO L78 Accepts]: Start accepts. Automaton has 7552 states and 10023 transitions. Word has length 122 [2021-11-07 13:05:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:01,042 INFO L470 AbstractCegarLoop]: Abstraction has 7552 states and 10023 transitions. [2021-11-07 13:05:01,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2021-11-07 13:05:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 7552 states and 10023 transitions. [2021-11-07 13:05:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 13:05:01,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:01,050 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:01,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 13:05:01,051 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:01,051 INFO L85 PathProgramCache]: Analyzing trace with hash -655559387, now seen corresponding path program 1 times [2021-11-07 13:05:01,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:01,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408360686] [2021-11-07 13:05:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:01,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:05:01,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:01,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408360686] [2021-11-07 13:05:01,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408360686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:05:01,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280006045] [2021-11-07 13:05:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:01,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:01,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:01,267 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) [2021-11-07 13:05:01,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 13:05:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:01,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:05:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:05:02,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:02,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280006045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:02,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:05:02,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-07 13:05:02,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980337775] [2021-11-07 13:05:02,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:02,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:02,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:02,302 INFO L87 Difference]: Start difference. First operand 7552 states and 10023 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-11-07 13:05:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:03,569 INFO L93 Difference]: Finished difference Result 22589 states and 29987 transitions. [2021-11-07 13:05:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:05:03,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 125 [2021-11-07 13:05:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:03,616 INFO L225 Difference]: With dead ends: 22589 [2021-11-07 13:05:03,616 INFO L226 Difference]: Without dead ends: 22582 [2021-11-07 13:05:03,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.86ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:03,630 INFO L933 BasicCegarLoop]: 2064 mSDtfsCounter, 2242 mSDsluCounter, 2613 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 510.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2242 SdHoareTripleChecker+Valid, 4677 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.63ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 551.58ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:03,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2242 Valid, 4677 Invalid, 36 Unknown, 0 Unchecked, 6.63ms Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 551.58ms Time] [2021-11-07 13:05:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22582 states. [2021-11-07 13:05:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22582 to 22224. [2021-11-07 13:05:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22224 states, 22223 states have (on average 1.3289834855780047) internal successors, (29534), 22223 states have internal predecessors, (29534), 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) [2021-11-07 13:05:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22224 states to 22224 states and 29534 transitions. [2021-11-07 13:05:04,594 INFO L78 Accepts]: Start accepts. Automaton has 22224 states and 29534 transitions. Word has length 125 [2021-11-07 13:05:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:04,595 INFO L470 AbstractCegarLoop]: Abstraction has 22224 states and 29534 transitions. [2021-11-07 13:05:04,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-11-07 13:05:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 22224 states and 29534 transitions. [2021-11-07 13:05:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 13:05:04,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:04,613 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:04,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:04,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:04,840 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:04,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1242365401, now seen corresponding path program 1 times [2021-11-07 13:05:04,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:04,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860749746] [2021-11-07 13:05:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:04,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:05:05,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:05,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860749746] [2021-11-07 13:05:05,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860749746] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:05,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:05,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:05:05,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528567894] [2021-11-07 13:05:05,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:05,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:05,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:05,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:05,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:05:05,004 INFO L87 Difference]: Start difference. First operand 22224 states and 29534 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-11-07 13:05:06,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:06,370 INFO L93 Difference]: Finished difference Result 56977 states and 75584 transitions. [2021-11-07 13:05:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:05:06,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 125 [2021-11-07 13:05:06,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:06,423 INFO L225 Difference]: With dead ends: 56977 [2021-11-07 13:05:06,424 INFO L226 Difference]: Without dead ends: 34788 [2021-11-07 13:05:06,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.19ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:06,458 INFO L933 BasicCegarLoop]: 1913 mSDtfsCounter, 2194 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2194 SdHoareTripleChecker+Valid, 3704 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.67ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.36ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:06,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2194 Valid, 3704 Invalid, 12 Unknown, 0 Unchecked, 5.67ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 47.36ms Time] [2021-11-07 13:05:06,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34788 states. [2021-11-07 13:05:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34788 to 22216. [2021-11-07 13:05:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 22215 states have (on average 1.3285617825793383) internal successors, (29514), 22215 states have internal predecessors, (29514), 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) [2021-11-07 13:05:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 29514 transitions. [2021-11-07 13:05:07,520 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 29514 transitions. Word has length 125 [2021-11-07 13:05:07,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:07,520 INFO L470 AbstractCegarLoop]: Abstraction has 22216 states and 29514 transitions. [2021-11-07 13:05:07,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-11-07 13:05:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 29514 transitions. [2021-11-07 13:05:07,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 13:05:07,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:07,540 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:07,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 13:05:07,541 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -604554894, now seen corresponding path program 1 times [2021-11-07 13:05:07,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:07,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852431246] [2021-11-07 13:05:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:07,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:05:07,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:07,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852431246] [2021-11-07 13:05:07,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852431246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:07,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:07,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:07,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836207701] [2021-11-07 13:05:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:07,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:07,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:07,649 INFO L87 Difference]: Start difference. First operand 22216 states and 29514 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-11-07 13:05:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:09,056 INFO L93 Difference]: Finished difference Result 34895 states and 46362 transitions. [2021-11-07 13:05:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:09,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 130 [2021-11-07 13:05:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:09,074 INFO L225 Difference]: With dead ends: 34895 [2021-11-07 13:05:09,074 INFO L226 Difference]: Without dead ends: 12711 [2021-11-07 13:05:09,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.31ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:09,096 INFO L933 BasicCegarLoop]: 1202 mSDtfsCounter, 5 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 832.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2395 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 873.62ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:09,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 2395 Invalid, 6 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 873.62ms Time] [2021-11-07 13:05:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12711 states. [2021-11-07 13:05:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12711 to 12704. [2021-11-07 13:05:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12704 states, 12703 states have (on average 1.3284263559789027) internal successors, (16875), 12703 states have internal predecessors, (16875), 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) [2021-11-07 13:05:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12704 states to 12704 states and 16875 transitions. [2021-11-07 13:05:09,691 INFO L78 Accepts]: Start accepts. Automaton has 12704 states and 16875 transitions. Word has length 130 [2021-11-07 13:05:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:09,692 INFO L470 AbstractCegarLoop]: Abstraction has 12704 states and 16875 transitions. [2021-11-07 13:05:09,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-11-07 13:05:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 12704 states and 16875 transitions. [2021-11-07 13:05:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 13:05:09,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:09,703 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:09,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 13:05:09,704 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1963548884, now seen corresponding path program 1 times [2021-11-07 13:05:09,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:09,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288248197] [2021-11-07 13:05:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:09,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:05:09,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:09,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288248197] [2021-11-07 13:05:09,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288248197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:09,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:09,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:09,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195576919] [2021-11-07 13:05:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:09,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:09,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:09,818 INFO L87 Difference]: Start difference. First operand 12704 states and 16875 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2021-11-07 13:05:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:10,732 INFO L93 Difference]: Finished difference Result 34996 states and 46511 transitions. [2021-11-07 13:05:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:10,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 132 [2021-11-07 13:05:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:10,769 INFO L225 Difference]: With dead ends: 34996 [2021-11-07 13:05:10,769 INFO L226 Difference]: Without dead ends: 23850 [2021-11-07 13:05:10,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.75ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:10,787 INFO L933 BasicCegarLoop]: 2319 mSDtfsCounter, 1154 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.31ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:10,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 3512 Invalid, 9 Unknown, 0 Unchecked, 5.49ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 8.31ms Time] [2021-11-07 13:05:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23850 states. [2021-11-07 13:05:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23850 to 12710. [2021-11-07 13:05:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12710 states, 12709 states have (on average 1.3282713038004563) internal successors, (16881), 12709 states have internal predecessors, (16881), 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) [2021-11-07 13:05:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12710 states to 12710 states and 16881 transitions. [2021-11-07 13:05:11,323 INFO L78 Accepts]: Start accepts. Automaton has 12710 states and 16881 transitions. Word has length 132 [2021-11-07 13:05:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:11,324 INFO L470 AbstractCegarLoop]: Abstraction has 12710 states and 16881 transitions. [2021-11-07 13:05:11,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2021-11-07 13:05:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 12710 states and 16881 transitions. [2021-11-07 13:05:11,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 13:05:11,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:11,333 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:11,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 13:05:11,334 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:11,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1101609432, now seen corresponding path program 1 times [2021-11-07 13:05:11,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:11,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113751296] [2021-11-07 13:05:11,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:11,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:05:11,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:11,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113751296] [2021-11-07 13:05:11,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113751296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:11,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:11,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:11,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063895827] [2021-11-07 13:05:11,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:11,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:11,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:11,522 INFO L87 Difference]: Start difference. First operand 12710 states and 16881 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2021-11-07 13:05:12,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:05:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:13,212 INFO L93 Difference]: Finished difference Result 23813 states and 31644 transitions. [2021-11-07 13:05:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:13,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 132 [2021-11-07 13:05:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:13,226 INFO L225 Difference]: With dead ends: 23813 [2021-11-07 13:05:13,226 INFO L226 Difference]: Without dead ends: 11138 [2021-11-07 13:05:13,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.81ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:13,241 INFO L933 BasicCegarLoop]: 1863 mSDtfsCounter, 1050 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1116.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1163.23ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:13,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 2586 Invalid, 11 Unknown, 0 Unchecked, 2.65ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 1163.23ms Time] [2021-11-07 13:05:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11138 states. [2021-11-07 13:05:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11138 to 11138. [2021-11-07 13:05:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11138 states, 11137 states have (on average 1.3258507677112328) internal successors, (14766), 11137 states have internal predecessors, (14766), 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) [2021-11-07 13:05:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11138 states to 11138 states and 14766 transitions. [2021-11-07 13:05:13,626 INFO L78 Accepts]: Start accepts. Automaton has 11138 states and 14766 transitions. Word has length 132 [2021-11-07 13:05:13,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:13,627 INFO L470 AbstractCegarLoop]: Abstraction has 11138 states and 14766 transitions. [2021-11-07 13:05:13,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2021-11-07 13:05:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 11138 states and 14766 transitions. [2021-11-07 13:05:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 13:05:13,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:13,637 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:13,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 13:05:13,637 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:13,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:13,638 INFO L85 PathProgramCache]: Analyzing trace with hash -560815859, now seen corresponding path program 1 times [2021-11-07 13:05:13,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:13,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670491930] [2021-11-07 13:05:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:13,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:05:13,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:13,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670491930] [2021-11-07 13:05:13,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670491930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:05:13,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91402727] [2021-11-07 13:05:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:13,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:13,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:13,755 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) [2021-11-07 13:05:13,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 13:05:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:14,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2569 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:05:14,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 13:05:14,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:05:14,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91402727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:14,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:05:14,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 13:05:14,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090732368] [2021-11-07 13:05:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:14,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:14,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:14,652 INFO L87 Difference]: Start difference. First operand 11138 states and 14766 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-11-07 13:05:15,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:15,589 INFO L93 Difference]: Finished difference Result 26023 states and 34515 transitions. [2021-11-07 13:05:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 136 [2021-11-07 13:05:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:15,615 INFO L225 Difference]: With dead ends: 26023 [2021-11-07 13:05:15,615 INFO L226 Difference]: Without dead ends: 20464 [2021-11-07 13:05:15,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.15ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:15,629 INFO L933 BasicCegarLoop]: 2230 mSDtfsCounter, 1085 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 3372 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.81ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:15,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 3372 Invalid, 34 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 34.81ms Time] [2021-11-07 13:05:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20464 states. [2021-11-07 13:05:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20464 to 11166. [2021-11-07 13:05:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11166 states, 11165 states have (on average 1.3250335871025527) internal successors, (14794), 11165 states have internal predecessors, (14794), 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) [2021-11-07 13:05:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11166 states to 11166 states and 14794 transitions. [2021-11-07 13:05:16,236 INFO L78 Accepts]: Start accepts. Automaton has 11166 states and 14794 transitions. Word has length 136 [2021-11-07 13:05:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:16,236 INFO L470 AbstractCegarLoop]: Abstraction has 11166 states and 14794 transitions. [2021-11-07 13:05:16,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-11-07 13:05:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 11166 states and 14794 transitions. [2021-11-07 13:05:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 13:05:16,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:16,244 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:16,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 13:05:16,471 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,SelfDestructingSolverStorable13 [2021-11-07 13:05:16,472 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:16,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1241688413, now seen corresponding path program 1 times [2021-11-07 13:05:16,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:16,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310975448] [2021-11-07 13:05:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:16,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:05:16,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:16,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310975448] [2021-11-07 13:05:16,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310975448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:16,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:16,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:16,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344455042] [2021-11-07 13:05:16,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:16,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:16,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:16,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:16,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:16,608 INFO L87 Difference]: Start difference. First operand 11166 states and 14794 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-11-07 13:05:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:17,238 INFO L93 Difference]: Finished difference Result 20908 states and 27736 transitions. [2021-11-07 13:05:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:17,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 136 [2021-11-07 13:05:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:17,257 INFO L225 Difference]: With dead ends: 20908 [2021-11-07 13:05:17,257 INFO L226 Difference]: Without dead ends: 11348 [2021-11-07 13:05:17,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.81ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:17,276 INFO L933 BasicCegarLoop]: 1184 mSDtfsCounter, 54 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.99ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.82ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:17,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 2362 Invalid, 31 Unknown, 0 Unchecked, 1.99ms Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 28.82ms Time] [2021-11-07 13:05:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11348 states. [2021-11-07 13:05:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11348 to 11180. [2021-11-07 13:05:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11180 states, 11179 states have (on average 1.3246265318901511) internal successors, (14808), 11179 states have internal predecessors, (14808), 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) [2021-11-07 13:05:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11180 states to 11180 states and 14808 transitions. [2021-11-07 13:05:17,832 INFO L78 Accepts]: Start accepts. Automaton has 11180 states and 14808 transitions. Word has length 136 [2021-11-07 13:05:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:17,833 INFO L470 AbstractCegarLoop]: Abstraction has 11180 states and 14808 transitions. [2021-11-07 13:05:17,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-11-07 13:05:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 11180 states and 14808 transitions. [2021-11-07 13:05:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 13:05:17,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:17,840 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:17,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 13:05:17,841 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:17,841 INFO L85 PathProgramCache]: Analyzing trace with hash 622000377, now seen corresponding path program 1 times [2021-11-07 13:05:17,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:17,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138512775] [2021-11-07 13:05:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:17,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:05:17,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:17,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138512775] [2021-11-07 13:05:17,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138512775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:17,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:17,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:17,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981674286] [2021-11-07 13:05:17,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:17,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:17,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:17,954 INFO L87 Difference]: Start difference. First operand 11180 states and 14808 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2021-11-07 13:05:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:18,907 INFO L93 Difference]: Finished difference Result 23879 states and 31685 transitions. [2021-11-07 13:05:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:18,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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 137 [2021-11-07 13:05:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:18,924 INFO L225 Difference]: With dead ends: 23879 [2021-11-07 13:05:18,925 INFO L226 Difference]: Without dead ends: 14305 [2021-11-07 13:05:18,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.63ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:18,933 INFO L933 BasicCegarLoop]: 1878 mSDtfsCounter, 755 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 404.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 439.67ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:18,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [755 Valid, 2981 Invalid, 37 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 439.67ms Time] [2021-11-07 13:05:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14305 states. [2021-11-07 13:05:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14305 to 14304. [2021-11-07 13:05:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14304 states, 14303 states have (on average 1.3251765363909669) internal successors, (18954), 14303 states have internal predecessors, (18954), 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) [2021-11-07 13:05:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14304 states to 14304 states and 18954 transitions. [2021-11-07 13:05:19,427 INFO L78 Accepts]: Start accepts. Automaton has 14304 states and 18954 transitions. Word has length 137 [2021-11-07 13:05:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:19,427 INFO L470 AbstractCegarLoop]: Abstraction has 14304 states and 18954 transitions. [2021-11-07 13:05:19,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2021-11-07 13:05:19,428 INFO L276 IsEmpty]: Start isEmpty. Operand 14304 states and 18954 transitions. [2021-11-07 13:05:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 13:05:19,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:19,436 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:19,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 13:05:19,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:19,437 INFO L85 PathProgramCache]: Analyzing trace with hash 341692227, now seen corresponding path program 1 times [2021-11-07 13:05:19,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:19,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117953404] [2021-11-07 13:05:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:19,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:05:19,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:19,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117953404] [2021-11-07 13:05:19,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117953404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:19,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:19,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:05:19,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143843213] [2021-11-07 13:05:19,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:19,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:05:19,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:19,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:05:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:19,758 INFO L87 Difference]: Start difference. First operand 14304 states and 18954 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-11-07 13:05:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:21,588 INFO L93 Difference]: Finished difference Result 46921 states and 62179 transitions. [2021-11-07 13:05:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 13:05:21,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 137 [2021-11-07 13:05:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:21,753 INFO L225 Difference]: With dead ends: 46921 [2021-11-07 13:05:21,753 INFO L226 Difference]: Without dead ends: 34223 [2021-11-07 13:05:21,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.98ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:05:21,768 INFO L933 BasicCegarLoop]: 1933 mSDtfsCounter, 4391 mSDsluCounter, 5399 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4391 SdHoareTripleChecker+Valid, 7332 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.67ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.54ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:21,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4391 Valid, 7332 Invalid, 117 Unknown, 0 Unchecked, 10.67ms Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 155.54ms Time] [2021-11-07 13:05:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34223 states. [2021-11-07 13:05:22,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34223 to 14322. [2021-11-07 13:05:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14322 states, 14321 states have (on average 1.3247678234760143) internal successors, (18972), 14321 states have internal predecessors, (18972), 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) [2021-11-07 13:05:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14322 states to 14322 states and 18972 transitions. [2021-11-07 13:05:22,420 INFO L78 Accepts]: Start accepts. Automaton has 14322 states and 18972 transitions. Word has length 137 [2021-11-07 13:05:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:22,420 INFO L470 AbstractCegarLoop]: Abstraction has 14322 states and 18972 transitions. [2021-11-07 13:05:22,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-11-07 13:05:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 14322 states and 18972 transitions. [2021-11-07 13:05:22,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 13:05:22,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:22,427 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:22,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 13:05:22,427 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1275223527, now seen corresponding path program 1 times [2021-11-07 13:05:22,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:22,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84092872] [2021-11-07 13:05:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:22,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:05:22,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:22,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84092872] [2021-11-07 13:05:22,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84092872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:22,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:22,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 13:05:22,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811022279] [2021-11-07 13:05:22,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:22,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 13:05:22,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:22,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 13:05:22,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 13:05:22,619 INFO L87 Difference]: Start difference. First operand 14322 states and 18972 transitions. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2021-11-07 13:05:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:25,002 INFO L93 Difference]: Finished difference Result 66589 states and 88377 transitions. [2021-11-07 13:05:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 13:05:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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 139 [2021-11-07 13:05:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:25,095 INFO L225 Difference]: With dead ends: 66589 [2021-11-07 13:05:25,095 INFO L226 Difference]: Without dead ends: 53873 [2021-11-07 13:05:25,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.27ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 13:05:25,123 INFO L933 BasicCegarLoop]: 2624 mSDtfsCounter, 5110 mSDsluCounter, 8284 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5110 SdHoareTripleChecker+Valid, 10908 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.03ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.94ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:25,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5110 Valid, 10908 Invalid, 162 Unknown, 0 Unchecked, 11.03ms Time], IncrementalHoareTripleChecker [22 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 143.94ms Time] [2021-11-07 13:05:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53873 states. [2021-11-07 13:05:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53873 to 14346. [2021-11-07 13:05:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14346 states, 14345 states have (on average 1.324224468455908) internal successors, (18996), 14345 states have internal predecessors, (18996), 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) [2021-11-07 13:05:26,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14346 states to 14346 states and 18996 transitions. [2021-11-07 13:05:26,032 INFO L78 Accepts]: Start accepts. Automaton has 14346 states and 18996 transitions. Word has length 139 [2021-11-07 13:05:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:26,033 INFO L470 AbstractCegarLoop]: Abstraction has 14346 states and 18996 transitions. [2021-11-07 13:05:26,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2021-11-07 13:05:26,033 INFO L276 IsEmpty]: Start isEmpty. Operand 14346 states and 18996 transitions. [2021-11-07 13:05:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 13:05:26,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:26,040 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:26,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 13:05:26,040 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1482052061, now seen corresponding path program 1 times [2021-11-07 13:05:26,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:26,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68409791] [2021-11-07 13:05:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:26,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:05:26,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:26,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68409791] [2021-11-07 13:05:26,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68409791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:26,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:26,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:05:26,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434490225] [2021-11-07 13:05:26,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:26,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:05:26,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:05:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:26,257 INFO L87 Difference]: Start difference. First operand 14346 states and 18996 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2021-11-07 13:05:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:29,241 INFO L93 Difference]: Finished difference Result 65569 states and 87075 transitions. [2021-11-07 13:05:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 13:05:29,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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 141 [2021-11-07 13:05:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:29,325 INFO L225 Difference]: With dead ends: 65569 [2021-11-07 13:05:29,326 INFO L226 Difference]: Without dead ends: 52829 [2021-11-07 13:05:29,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.23ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:05:29,347 INFO L933 BasicCegarLoop]: 2458 mSDtfsCounter, 3429 mSDsluCounter, 6609 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 9067 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.17ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.58ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:29,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3429 Valid, 9067 Invalid, 149 Unknown, 0 Unchecked, 9.17ms Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 196.58ms Time] [2021-11-07 13:05:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52829 states. [2021-11-07 13:05:30,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52829 to 14364. [2021-11-07 13:05:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14364 states, 14363 states have (on average 1.3238181438418157) internal successors, (19014), 14363 states have internal predecessors, (19014), 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) [2021-11-07 13:05:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14364 states to 14364 states and 19014 transitions. [2021-11-07 13:05:30,335 INFO L78 Accepts]: Start accepts. Automaton has 14364 states and 19014 transitions. Word has length 141 [2021-11-07 13:05:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:30,336 INFO L470 AbstractCegarLoop]: Abstraction has 14364 states and 19014 transitions. [2021-11-07 13:05:30,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2021-11-07 13:05:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 14364 states and 19014 transitions. [2021-11-07 13:05:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 13:05:30,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:30,343 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 13:05:30,343 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash 268842815, now seen corresponding path program 1 times [2021-11-07 13:05:30,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:30,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669416046] [2021-11-07 13:05:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:30,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:05:30,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:30,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669416046] [2021-11-07 13:05:30,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669416046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:30,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:30,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:05:30,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934030563] [2021-11-07 13:05:30,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:30,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:05:30,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:30,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:05:30,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:30,512 INFO L87 Difference]: Start difference. First operand 14364 states and 19014 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2021-11-07 13:05:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:33,745 INFO L93 Difference]: Finished difference Result 65587 states and 87087 transitions. [2021-11-07 13:05:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 13:05:33,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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 143 [2021-11-07 13:05:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:33,840 INFO L225 Difference]: With dead ends: 65587 [2021-11-07 13:05:33,840 INFO L226 Difference]: Without dead ends: 52829 [2021-11-07 13:05:33,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.01ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:05:33,873 INFO L933 BasicCegarLoop]: 2458 mSDtfsCounter, 3429 mSDsluCounter, 6609 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 258.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3429 SdHoareTripleChecker+Valid, 9067 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.45ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 285.75ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:33,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3429 Valid, 9067 Invalid, 149 Unknown, 0 Unchecked, 9.45ms Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 285.75ms Time] [2021-11-07 13:05:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52829 states. [2021-11-07 13:05:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52829 to 14382. [2021-11-07 13:05:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14381 states have (on average 1.3234128363813364) internal successors, (19032), 14381 states have internal predecessors, (19032), 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) [2021-11-07 13:05:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 19032 transitions. [2021-11-07 13:05:35,107 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 19032 transitions. Word has length 143 [2021-11-07 13:05:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:35,107 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 19032 transitions. [2021-11-07 13:05:35,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2021-11-07 13:05:35,108 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 19032 transitions. [2021-11-07 13:05:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 13:05:35,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:35,114 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:35,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 13:05:35,115 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:35,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1097768443, now seen corresponding path program 1 times [2021-11-07 13:05:35,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:35,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108756508] [2021-11-07 13:05:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:35,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:05:35,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:35,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108756508] [2021-11-07 13:05:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108756508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:35,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:35,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:05:35,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878524885] [2021-11-07 13:05:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:35,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:05:35,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:05:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:35,285 INFO L87 Difference]: Start difference. First operand 14382 states and 19032 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 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) [2021-11-07 13:05:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:38,881 INFO L93 Difference]: Finished difference Result 65117 states and 86467 transitions. [2021-11-07 13:05:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 13:05:38,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 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 145 [2021-11-07 13:05:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:38,976 INFO L225 Difference]: With dead ends: 65117 [2021-11-07 13:05:38,976 INFO L226 Difference]: Without dead ends: 52341 [2021-11-07 13:05:39,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.58ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:05:39,006 INFO L933 BasicCegarLoop]: 3026 mSDtfsCounter, 2941 mSDsluCounter, 7177 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2941 SdHoareTripleChecker+Valid, 10203 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.98ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 230.89ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:39,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2941 Valid, 10203 Invalid, 149 Unknown, 0 Unchecked, 10.98ms Time], IncrementalHoareTripleChecker [17 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 230.89ms Time] [2021-11-07 13:05:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52341 states. [2021-11-07 13:05:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52341 to 14400. [2021-11-07 13:05:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14400 states, 14399 states have (on average 1.3230085422598792) internal successors, (19050), 14399 states have internal predecessors, (19050), 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) [2021-11-07 13:05:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14400 states to 14400 states and 19050 transitions. [2021-11-07 13:05:40,323 INFO L78 Accepts]: Start accepts. Automaton has 14400 states and 19050 transitions. Word has length 145 [2021-11-07 13:05:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:40,323 INFO L470 AbstractCegarLoop]: Abstraction has 14400 states and 19050 transitions. [2021-11-07 13:05:40,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 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) [2021-11-07 13:05:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 14400 states and 19050 transitions. [2021-11-07 13:05:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 13:05:40,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:40,332 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:40,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 13:05:40,332 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:40,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash 503951895, now seen corresponding path program 1 times [2021-11-07 13:05:40,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:40,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67114729] [2021-11-07 13:05:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:40,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:05:40,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:40,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67114729] [2021-11-07 13:05:40,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67114729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:40,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:40,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:05:40,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950136760] [2021-11-07 13:05:40,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:40,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:40,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:40,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:40,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:05:40,502 INFO L87 Difference]: Start difference. First operand 14400 states and 19050 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2021-11-07 13:05:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:42,883 INFO L93 Difference]: Finished difference Result 39268 states and 52085 transitions. [2021-11-07 13:05:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:05:42,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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 147 [2021-11-07 13:05:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:42,922 INFO L225 Difference]: With dead ends: 39268 [2021-11-07 13:05:42,922 INFO L226 Difference]: Without dead ends: 26474 [2021-11-07 13:05:42,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.70ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:05:42,935 INFO L933 BasicCegarLoop]: 1987 mSDtfsCounter, 2981 mSDsluCounter, 2737 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2981 SdHoareTripleChecker+Valid, 4724 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.40ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:42,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2981 Valid, 4724 Invalid, 69 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 139.40ms Time] [2021-11-07 13:05:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26474 states. [2021-11-07 13:05:43,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26474 to 14382. [2021-11-07 13:05:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14381 states have (on average 1.3221611848967387) internal successors, (19014), 14381 states have internal predecessors, (19014), 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) [2021-11-07 13:05:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 19014 transitions. [2021-11-07 13:05:44,013 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 19014 transitions. Word has length 147 [2021-11-07 13:05:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:44,013 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 19014 transitions. [2021-11-07 13:05:44,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2021-11-07 13:05:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 19014 transitions. [2021-11-07 13:05:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 13:05:44,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:44,022 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:44,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 13:05:44,022 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1102294551, now seen corresponding path program 1 times [2021-11-07 13:05:44,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:44,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510256045] [2021-11-07 13:05:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:44,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 13:05:44,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:44,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510256045] [2021-11-07 13:05:44,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510256045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:05:44,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:05:44,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:05:44,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274262008] [2021-11-07 13:05:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:44,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:05:44,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:05:44,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:44,206 INFO L87 Difference]: Start difference. First operand 14382 states and 19014 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2021-11-07 13:05:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:45,443 INFO L93 Difference]: Finished difference Result 28731 states and 37989 transitions. [2021-11-07 13:05:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:05:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 147 [2021-11-07 13:05:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:45,463 INFO L225 Difference]: With dead ends: 28731 [2021-11-07 13:05:45,463 INFO L226 Difference]: Without dead ends: 14383 [2021-11-07 13:05:45,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.35ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:05:45,472 INFO L933 BasicCegarLoop]: 1189 mSDtfsCounter, 0 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.93ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:45,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2376 Invalid, 3 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.93ms Time] [2021-11-07 13:05:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14383 states. [2021-11-07 13:05:46,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14383 to 14383. [2021-11-07 13:05:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14383 states, 14382 states have (on average 1.3221387845918509) internal successors, (19015), 14382 states have internal predecessors, (19015), 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) [2021-11-07 13:05:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14383 states to 14383 states and 19015 transitions. [2021-11-07 13:05:46,497 INFO L78 Accepts]: Start accepts. Automaton has 14383 states and 19015 transitions. Word has length 147 [2021-11-07 13:05:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:46,497 INFO L470 AbstractCegarLoop]: Abstraction has 14383 states and 19015 transitions. [2021-11-07 13:05:46,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2021-11-07 13:05:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 14383 states and 19015 transitions. [2021-11-07 13:05:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 13:05:46,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:46,503 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:46,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 13:05:46,503 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1313175400, now seen corresponding path program 1 times [2021-11-07 13:05:46,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:46,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910137638] [2021-11-07 13:05:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:46,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-07 13:05:46,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:46,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910137638] [2021-11-07 13:05:46,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910137638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:05:46,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989804943] [2021-11-07 13:05:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:46,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:46,756 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) [2021-11-07 13:05:46,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 13:05:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 2705 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 13:05:49,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:05:49,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:05:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 13:05:50,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989804943] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 13:05:50,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:05:50,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 9 [2021-11-07 13:05:50,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545075555] [2021-11-07 13:05:50,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:50,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:50,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:50,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:05:50,138 INFO L87 Difference]: Start difference. First operand 14383 states and 19015 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2021-11-07 13:05:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:52,034 INFO L93 Difference]: Finished difference Result 29117 states and 38476 transitions. [2021-11-07 13:05:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:05:52,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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 148 [2021-11-07 13:05:52,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:52,055 INFO L225 Difference]: With dead ends: 29117 [2021-11-07 13:05:52,055 INFO L226 Difference]: Without dead ends: 16341 [2021-11-07 13:05:52,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.93ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 13:05:52,067 INFO L933 BasicCegarLoop]: 1987 mSDtfsCounter, 1125 mSDsluCounter, 2815 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 4802 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 203.90ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:52,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 4802 Invalid, 39 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 203.90ms Time] [2021-11-07 13:05:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16341 states. [2021-11-07 13:05:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16341 to 14389. [2021-11-07 13:05:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14389 states, 14388 states have (on average 1.3220044481512372) internal successors, (19021), 14388 states have internal predecessors, (19021), 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) [2021-11-07 13:05:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14389 states to 14389 states and 19021 transitions. [2021-11-07 13:05:53,166 INFO L78 Accepts]: Start accepts. Automaton has 14389 states and 19021 transitions. Word has length 148 [2021-11-07 13:05:53,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:53,167 INFO L470 AbstractCegarLoop]: Abstraction has 14389 states and 19021 transitions. [2021-11-07 13:05:53,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2021-11-07 13:05:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 14389 states and 19021 transitions. [2021-11-07 13:05:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 13:05:53,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:53,173 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:53,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 13:05:53,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:53,374 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:05:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:05:53,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1630145864, now seen corresponding path program 1 times [2021-11-07 13:05:53,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:05:53,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622548540] [2021-11-07 13:05:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:53,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:05:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 13:05:53,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:05:53,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622548540] [2021-11-07 13:05:53,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622548540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:05:53,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324981724] [2021-11-07 13:05:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:05:53,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:05:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:05:53,649 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) [2021-11-07 13:05:53,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 13:05:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:05:54,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 13:05:54,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:05:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 13:05:54,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:05:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 13:05:54,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324981724] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 13:05:54,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:05:54,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2021-11-07 13:05:54,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085440221] [2021-11-07 13:05:54,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:05:54,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:05:54,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:05:54,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:05:54,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:05:54,899 INFO L87 Difference]: Start difference. First operand 14389 states and 19021 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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) [2021-11-07 13:05:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:05:58,259 INFO L93 Difference]: Finished difference Result 42973 states and 56876 transitions. [2021-11-07 13:05:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:05:58,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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 149 [2021-11-07 13:05:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:05:58,304 INFO L225 Difference]: With dead ends: 42973 [2021-11-07 13:05:58,304 INFO L226 Difference]: Without dead ends: 28620 [2021-11-07 13:05:58,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.91ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:05:58,334 INFO L933 BasicCegarLoop]: 1997 mSDtfsCounter, 1137 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 371.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 4257 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.45ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 404.92ms IncrementalHoareTripleChecker+Time [2021-11-07 13:05:58,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 4257 Invalid, 62 Unknown, 0 Unchecked, 5.45ms Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 404.92ms Time] [2021-11-07 13:05:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28620 states. [2021-11-07 13:05:59,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28620 to 14539. [2021-11-07 13:05:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14539 states, 14538 states have (on average 1.3236346127390288) internal successors, (19243), 14538 states have internal predecessors, (19243), 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) [2021-11-07 13:05:59,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14539 states to 14539 states and 19243 transitions. [2021-11-07 13:05:59,807 INFO L78 Accepts]: Start accepts. Automaton has 14539 states and 19243 transitions. Word has length 149 [2021-11-07 13:05:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:05:59,807 INFO L470 AbstractCegarLoop]: Abstraction has 14539 states and 19243 transitions. [2021-11-07 13:05:59,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 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) [2021-11-07 13:05:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 14539 states and 19243 transitions. [2021-11-07 13:05:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 13:05:59,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:05:59,814 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:05:59,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 13:06:00,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:06:00,015 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:06:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:06:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1819553174, now seen corresponding path program 1 times [2021-11-07 13:06:00,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:06:00,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198363917] [2021-11-07 13:06:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:06:00,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:06:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:06:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 13:06:00,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:06:00,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198363917] [2021-11-07 13:06:00,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198363917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:06:00,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853901001] [2021-11-07 13:06:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:06:00,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:06:00,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:06:00,283 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) [2021-11-07 13:06:00,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 13:06:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:06:03,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 13:06:03,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:06:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 13:06:03,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:06:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 13:06:03,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853901001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:06:03,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:06:03,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 11 [2021-11-07 13:06:03,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24425249] [2021-11-07 13:06:03,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:06:03,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 13:06:03,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:06:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 13:06:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-07 13:06:03,969 INFO L87 Difference]: Start difference. First operand 14539 states and 19243 transitions. Second operand has 11 states, 11 states have (on average 22.272727272727273) internal successors, (245), 11 states have internal predecessors, (245), 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) [2021-11-07 13:06:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:06:06,722 INFO L93 Difference]: Finished difference Result 34417 states and 45478 transitions. [2021-11-07 13:06:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 13:06:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.272727272727273) internal successors, (245), 11 states have internal predecessors, (245), 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 150 [2021-11-07 13:06:06,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:06:06,748 INFO L225 Difference]: With dead ends: 34417 [2021-11-07 13:06:06,748 INFO L226 Difference]: Without dead ends: 19913 [2021-11-07 13:06:06,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 132.65ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-07 13:06:06,761 INFO L933 BasicCegarLoop]: 2757 mSDtfsCounter, 3386 mSDsluCounter, 13460 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 615.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 16217 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.23ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 660.53ms IncrementalHoareTripleChecker+Time [2021-11-07 13:06:06,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3386 Valid, 16217 Invalid, 165 Unknown, 0 Unchecked, 12.23ms Time], IncrementalHoareTripleChecker [16 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 660.53ms Time] [2021-11-07 13:06:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19913 states. [2021-11-07 13:06:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19913 to 14558. [2021-11-07 13:06:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14558 states, 14557 states have (on average 1.3232122003159992) internal successors, (19262), 14557 states have internal predecessors, (19262), 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) [2021-11-07 13:06:08,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14558 states to 14558 states and 19262 transitions. [2021-11-07 13:06:08,093 INFO L78 Accepts]: Start accepts. Automaton has 14558 states and 19262 transitions. Word has length 150 [2021-11-07 13:06:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:06:08,093 INFO L470 AbstractCegarLoop]: Abstraction has 14558 states and 19262 transitions. [2021-11-07 13:06:08,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.272727272727273) internal successors, (245), 11 states have internal predecessors, (245), 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) [2021-11-07 13:06:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 14558 states and 19262 transitions. [2021-11-07 13:06:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 13:06:08,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:06:08,100 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:06:08,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 13:06:08,300 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,SelfDestructingSolverStorable25 [2021-11-07 13:06:08,300 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:06:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:06:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash 850985335, now seen corresponding path program 2 times [2021-11-07 13:06:08,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:06:08,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458465255] [2021-11-07 13:06:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:06:08,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:06:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:06:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 13:06:08,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:06:08,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458465255] [2021-11-07 13:06:08,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458465255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:06:08,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660762066] [2021-11-07 13:06:08,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 13:06:08,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:06:08,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:06:08,626 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) [2021-11-07 13:06:08,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 13:06:11,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 13:06:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:06:11,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 13:06:11,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:06:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-07 13:06:12,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:06:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 13:06:12,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660762066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:06:12,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:06:12,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 10] total 14 [2021-11-07 13:06:12,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235604539] [2021-11-07 13:06:12,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:06:12,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 13:06:12,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:06:12,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 13:06:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-07 13:06:12,543 INFO L87 Difference]: Start difference. First operand 14558 states and 19262 transitions. Second operand has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 14 states have internal predecessors, (155), 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) [2021-11-07 13:06:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:06:14,612 INFO L93 Difference]: Finished difference Result 29082 states and 38485 transitions. [2021-11-07 13:06:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 13:06:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 14 states have internal predecessors, (155), 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 154 [2021-11-07 13:06:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:06:14,632 INFO L225 Difference]: With dead ends: 29082 [2021-11-07 13:06:14,632 INFO L226 Difference]: Without dead ends: 14560 [2021-11-07 13:06:14,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 164.54ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-07 13:06:14,647 INFO L933 BasicCegarLoop]: 1189 mSDtfsCounter, 0 mSDsluCounter, 12991 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 486.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14180 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 520.99ms IncrementalHoareTripleChecker+Time [2021-11-07 13:06:14,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14180 Invalid, 118 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 520.99ms Time] [2021-11-07 13:06:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14560 states. [2021-11-07 13:06:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14560 to 14560. [2021-11-07 13:06:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14560 states, 14559 states have (on average 1.3231677999862628) internal successors, (19264), 14559 states have internal predecessors, (19264), 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) [2021-11-07 13:06:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14560 states to 14560 states and 19264 transitions. [2021-11-07 13:06:15,954 INFO L78 Accepts]: Start accepts. Automaton has 14560 states and 19264 transitions. Word has length 154 [2021-11-07 13:06:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:06:15,954 INFO L470 AbstractCegarLoop]: Abstraction has 14560 states and 19264 transitions. [2021-11-07 13:06:15,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.071428571428571) internal successors, (155), 14 states have internal predecessors, (155), 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) [2021-11-07 13:06:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 14560 states and 19264 transitions. [2021-11-07 13:06:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-07 13:06:15,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:06:15,960 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:06:15,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-07 13:06:16,161 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,SelfDestructingSolverStorable26 [2021-11-07 13:06:16,161 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:06:16,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:06:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash -274117289, now seen corresponding path program 3 times [2021-11-07 13:06:16,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:06:16,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845409308] [2021-11-07 13:06:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:06:16,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:06:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:06:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 13:06:16,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:06:16,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845409308] [2021-11-07 13:06:16,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845409308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:06:16,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078226423] [2021-11-07 13:06:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 13:06:16,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:06:16,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:06:16,612 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) [2021-11-07 13:06:16,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 13:06:29,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 13:06:29,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 13:06:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 2723 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 13:06:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:06:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 13:06:30,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:06:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078226423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:06:30,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:06:30,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2021-11-07 13:06:30,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844962475] [2021-11-07 13:06:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:06:30,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 13:06:30,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:06:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 13:06:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-07 13:06:30,276 INFO L87 Difference]: Start difference. First operand 14560 states and 19264 transitions. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 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) [2021-11-07 13:06:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:06:44,954 INFO L93 Difference]: Finished difference Result 130260 states and 172963 transitions. [2021-11-07 13:06:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 13:06:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 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 156 [2021-11-07 13:06:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:06:45,325 INFO L225 Difference]: With dead ends: 130260 [2021-11-07 13:06:45,325 INFO L226 Difference]: Without dead ends: 117328 [2021-11-07 13:06:45,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1036.07ms TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 13:06:45,371 INFO L933 BasicCegarLoop]: 4476 mSDtfsCounter, 15186 mSDsluCounter, 22333 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 389.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15186 SdHoareTripleChecker+Valid, 26809 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.89ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 466.97ms IncrementalHoareTripleChecker+Time [2021-11-07 13:06:45,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15186 Valid, 26809 Invalid, 535 Unknown, 0 Unchecked, 35.89ms Time], IncrementalHoareTripleChecker [37 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 466.97ms Time] [2021-11-07 13:06:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117328 states. [2021-11-07 13:06:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117328 to 14578. [2021-11-07 13:06:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 1.3223571379570556) internal successors, (19276), 14577 states have internal predecessors, (19276), 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) [2021-11-07 13:06:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 19276 transitions. [2021-11-07 13:06:48,252 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 19276 transitions. Word has length 156 [2021-11-07 13:06:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:06:48,252 INFO L470 AbstractCegarLoop]: Abstraction has 14578 states and 19276 transitions. [2021-11-07 13:06:48,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 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) [2021-11-07 13:06:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 19276 transitions. [2021-11-07 13:06:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 13:06:48,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:06:48,259 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:06:48,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 13:06:48,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:06:48,460 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:06:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:06:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash 573551420, now seen corresponding path program 1 times [2021-11-07 13:06:48,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:06:48,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020357628] [2021-11-07 13:06:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:06:48,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:06:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:06:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 13:06:48,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:06:48,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020357628] [2021-11-07 13:06:48,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020357628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:06:48,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589101396] [2021-11-07 13:06:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:06:48,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:06:48,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:06:48,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 13:06:48,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 13:06:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:06:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:06:49,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:06:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 13:06:49,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:06:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 13:06:49,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589101396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 13:06:49,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-07 13:06:49,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-07 13:06:49,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547524049] [2021-11-07 13:06:49,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-07 13:06:49,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 13:06:49,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:06:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 13:06:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:06:49,641 INFO L87 Difference]: Start difference. First operand 14578 states and 19276 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 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) [2021-11-07 13:06:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:06:59,981 INFO L93 Difference]: Finished difference Result 79154 states and 104733 transitions. [2021-11-07 13:06:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 13:06:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 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 157 [2021-11-07 13:06:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:07:00,102 INFO L225 Difference]: With dead ends: 79154 [2021-11-07 13:07:00,103 INFO L226 Difference]: Without dead ends: 66204 [2021-11-07 13:07:00,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.96ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:07:00,130 INFO L933 BasicCegarLoop]: 1958 mSDtfsCounter, 7879 mSDsluCounter, 5360 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7879 SdHoareTripleChecker+Valid, 7318 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.20ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.85ms IncrementalHoareTripleChecker+Time [2021-11-07 13:07:00,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7879 Valid, 7318 Invalid, 24 Unknown, 0 Unchecked, 10.20ms Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 17.85ms Time] [2021-11-07 13:07:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66204 states. [2021-11-07 13:07:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66204 to 15028. [2021-11-07 13:07:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15028 states, 15027 states have (on average 1.319291941172556) internal successors, (19825), 15027 states have internal predecessors, (19825), 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) [2021-11-07 13:07:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15028 states to 15028 states and 19825 transitions. [2021-11-07 13:07:02,797 INFO L78 Accepts]: Start accepts. Automaton has 15028 states and 19825 transitions. Word has length 157 [2021-11-07 13:07:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:07:02,797 INFO L470 AbstractCegarLoop]: Abstraction has 15028 states and 19825 transitions. [2021-11-07 13:07:02,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 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) [2021-11-07 13:07:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 15028 states and 19825 transitions. [2021-11-07 13:07:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-07 13:07:02,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:07:02,804 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:07:02,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 13:07:03,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 13:07:03,005 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:07:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:07:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1329815604, now seen corresponding path program 1 times [2021-11-07 13:07:03,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:07:03,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869582347] [2021-11-07 13:07:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:07:03,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:07:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:07:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 13:07:03,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:07:03,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869582347] [2021-11-07 13:07:03,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869582347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:07:03,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:07:03,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:07:03,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712243407] [2021-11-07 13:07:03,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:07:03,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:07:03,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:07:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:07:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:07:03,192 INFO L87 Difference]: Start difference. First operand 15028 states and 19825 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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)