./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.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 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:15:13,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:15:13,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:15:13,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:15:13,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:15:13,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:15:13,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:15:13,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:15:13,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:15:13,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:15:13,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:15:13,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:15:13,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:15:13,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:15:13,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:15:13,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:15:13,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:15:13,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:15:13,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:15:13,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:15:13,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:15:13,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:15:13,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:15:13,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:15:13,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:15:13,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:15:13,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:15:13,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:15:13,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:15:13,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:15:13,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:15:13,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:15:13,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:15:13,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:15:13,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:15:13,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:15:13,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:15:13,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:15:13,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:15:13,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:15:13,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:15:13,317 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:15:13,347 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:15:13,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:15:13,347 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:15:13,347 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:15:13,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:15:13,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:15:13,348 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:15:13,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:15:13,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:15:13,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:15:13,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:15:13,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:15:13,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:15:13,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:15:13,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:15:13,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:15:13,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:15:13,350 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:15:13,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:15:13,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:15:13,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:15:13,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a07d05bdda9164d6ceaf1185c6dc5dd43200f7171a99953930c3f9edfac2ac7 [2021-11-06 14:15:13,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:15:13,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:15:13,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:15:13,522 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:15:13,524 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:15:13,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-11-06 14:15:13,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84590bc9b/d741b42477074184928ce0a6b27b23e8/FLAG4ab598e43 [2021-11-06 14:15:14,056 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:15:14,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-11-06 14:15:14,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84590bc9b/d741b42477074184928ce0a6b27b23e8/FLAG4ab598e43 [2021-11-06 14:15:14,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84590bc9b/d741b42477074184928ce0a6b27b23e8 [2021-11-06 14:15:14,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:15:14,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:15:14,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:15:14,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:15:14,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:15:14,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:15:14" (1/1) ... [2021-11-06 14:15:14,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f72a302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:14, skipping insertion in model container [2021-11-06 14:15:14,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:15:14" (1/1) ... [2021-11-06 14:15:14,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:15:14,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:15:14,988 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2021-11-06 14:15:15,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:15:15,233 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:15:15,332 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i[159689,159702] [2021-11-06 14:15:15,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:15:15,502 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:15:15,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15 WrapperNode [2021-11-06 14:15:15,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:15:15,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:15:15,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:15:15,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:15:15,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:15:15,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:15:15,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:15:15,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:15:15,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:15:15,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:15:15,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:15:15,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:15:15,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (1/1) ... [2021-11-06 14:15:15,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:15:15,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:15,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 14:15:15,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 14:15:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:15:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rx_submit [2021-11-06 14:15:15,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rx_submit [2021-11-06 14:15:15,911 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_9 [2021-11-06 14:15:15,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_9 [2021-11-06 14:15:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:15:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:15:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:15:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure ipheth_rcvbulk_callback [2021-11-06 14:15:15,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ipheth_rcvbulk_callback [2021-11-06 14:15:15,912 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-06 14:15:15,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-06 14:15:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:15:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:15:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:15:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:15:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 14:15:15,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 14:15:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:15:15,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:15:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:15:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:15:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:15:15,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:15:15,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:15:17,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:15:17,722 INFO L299 CfgBuilder]: Removed 491 assume(true) statements. [2021-11-06 14:15:17,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:15:17 BoogieIcfgContainer [2021-11-06 14:15:17,725 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:15:17,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:15:17,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:15:17,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:15:17,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:15:14" (1/3) ... [2021-11-06 14:15:17,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7543f58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:15:17, skipping insertion in model container [2021-11-06 14:15:17,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:15:15" (2/3) ... [2021-11-06 14:15:17,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7543f58f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:15:17, skipping insertion in model container [2021-11-06 14:15:17,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:15:17" (3/3) ... [2021-11-06 14:15:17,731 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--usb--ipheth.ko-entry_point.cil.out.i [2021-11-06 14:15:17,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:15:17,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-06 14:15:17,776 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:15:17,782 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 14:15:17,782 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-06 14:15:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 453 states, 434 states have (on average 1.3894009216589862) internal successors, (603), 440 states have internal predecessors, (603), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-06 14:15:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-06 14:15:17,814 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:17,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:17,814 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:17,818 INFO L85 PathProgramCache]: Analyzing trace with hash 729149926, now seen corresponding path program 1 times [2021-11-06 14:15:17,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:17,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220993616] [2021-11-06 14:15:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:17,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:15:18,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:18,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220993616] [2021-11-06 14:15:18,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220993616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:18,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:18,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:15:18,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631542273] [2021-11-06 14:15:18,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:18,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:18,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:18,165 INFO L87 Difference]: Start difference. First operand has 453 states, 434 states have (on average 1.3894009216589862) internal successors, (603), 440 states have internal predecessors, (603), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:18,483 INFO L93 Difference]: Finished difference Result 1305 states and 1804 transitions. [2021-11-06 14:15:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:18,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-11-06 14:15:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:18,497 INFO L225 Difference]: With dead ends: 1305 [2021-11-06 14:15:18,497 INFO L226 Difference]: Without dead ends: 839 [2021-11-06 14:15:18,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-11-06 14:15:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2021-11-06 14:15:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 808 states have (on average 1.3316831683168318) internal successors, (1076), 814 states have internal predecessors, (1076), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-06 14:15:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1108 transitions. [2021-11-06 14:15:18,569 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1108 transitions. Word has length 19 [2021-11-06 14:15:18,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:18,570 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 1108 transitions. [2021-11-06 14:15:18,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:18,570 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1108 transitions. [2021-11-06 14:15:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-06 14:15:18,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:18,572 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:18,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:15:18,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:18,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1197836240, now seen corresponding path program 1 times [2021-11-06 14:15:18,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:18,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786480499] [2021-11-06 14:15:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:18,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:15:18,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:18,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786480499] [2021-11-06 14:15:18,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786480499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:18,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:18,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:15:18,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301212433] [2021-11-06 14:15:18,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:18,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:18,665 INFO L87 Difference]: Start difference. First operand 839 states and 1108 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:18,706 INFO L93 Difference]: Finished difference Result 869 states and 1136 transitions. [2021-11-06 14:15:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 26 [2021-11-06 14:15:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:18,710 INFO L225 Difference]: With dead ends: 869 [2021-11-06 14:15:18,710 INFO L226 Difference]: Without dead ends: 854 [2021-11-06 14:15:18,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-11-06 14:15:18,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 839. [2021-11-06 14:15:18,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 808 states have (on average 1.3304455445544554) internal successors, (1075), 814 states have internal predecessors, (1075), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-06 14:15:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1107 transitions. [2021-11-06 14:15:18,731 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1107 transitions. Word has length 26 [2021-11-06 14:15:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:18,732 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 1107 transitions. [2021-11-06 14:15:18,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1107 transitions. [2021-11-06 14:15:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-06 14:15:18,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:18,734 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:18,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:15:18,734 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1197776658, now seen corresponding path program 1 times [2021-11-06 14:15:18,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:18,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353772939] [2021-11-06 14:15:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:18,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:15:18,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:18,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353772939] [2021-11-06 14:15:18,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353772939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:18,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:18,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:15:18,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386763097] [2021-11-06 14:15:18,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:18,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:18,868 INFO L87 Difference]: Start difference. First operand 839 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:19,021 INFO L93 Difference]: Finished difference Result 2479 states and 3326 transitions. [2021-11-06 14:15:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 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 26 [2021-11-06 14:15:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:19,031 INFO L225 Difference]: With dead ends: 2479 [2021-11-06 14:15:19,031 INFO L226 Difference]: Without dead ends: 1658 [2021-11-06 14:15:19,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-11-06 14:15:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1646. [2021-11-06 14:15:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1589 states have (on average 1.3215859030837005) internal successors, (2100), 1597 states have internal predecessors, (2100), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-06 14:15:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2180 transitions. [2021-11-06 14:15:19,095 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2180 transitions. Word has length 26 [2021-11-06 14:15:19,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:19,096 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 2180 transitions. [2021-11-06 14:15:19,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2180 transitions. [2021-11-06 14:15:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-06 14:15:19,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:19,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:19,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:15:19,100 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:19,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1523628889, now seen corresponding path program 1 times [2021-11-06 14:15:19,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:19,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746656822] [2021-11-06 14:15:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:19,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:15:19,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:19,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746656822] [2021-11-06 14:15:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746656822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:19,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:19,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:15:19,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129729507] [2021-11-06 14:15:19,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:19,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:19,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:19,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,219 INFO L87 Difference]: Start difference. First operand 1646 states and 2180 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:19,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:19,255 INFO L93 Difference]: Finished difference Result 1646 states and 2180 transitions. [2021-11-06 14:15:19,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:19,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 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 27 [2021-11-06 14:15:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:19,261 INFO L225 Difference]: With dead ends: 1646 [2021-11-06 14:15:19,262 INFO L226 Difference]: Without dead ends: 1644 [2021-11-06 14:15:19,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-11-06 14:15:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1644. [2021-11-06 14:15:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1588 states have (on average 1.3211586901763224) internal successors, (2098), 1595 states have internal predecessors, (2098), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-06 14:15:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2178 transitions. [2021-11-06 14:15:19,308 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2178 transitions. Word has length 27 [2021-11-06 14:15:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:19,308 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 2178 transitions. [2021-11-06 14:15:19,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2178 transitions. [2021-11-06 14:15:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-06 14:15:19,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:19,310 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:19,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:15:19,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash -12145064, now seen corresponding path program 1 times [2021-11-06 14:15:19,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:19,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542874609] [2021-11-06 14:15:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:19,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:15:19,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:19,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542874609] [2021-11-06 14:15:19,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542874609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:19,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:19,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:15:19,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495156583] [2021-11-06 14:15:19,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:19,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,376 INFO L87 Difference]: Start difference. First operand 1644 states and 2178 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:19,432 INFO L93 Difference]: Finished difference Result 1644 states and 2178 transitions. [2021-11-06 14:15:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:19,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 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 28 [2021-11-06 14:15:19,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:19,437 INFO L225 Difference]: With dead ends: 1644 [2021-11-06 14:15:19,438 INFO L226 Difference]: Without dead ends: 1642 [2021-11-06 14:15:19,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-11-06 14:15:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1642. [2021-11-06 14:15:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1587 states have (on average 1.320730938878387) internal successors, (2096), 1593 states have internal predecessors, (2096), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-06 14:15:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2176 transitions. [2021-11-06 14:15:19,483 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2176 transitions. Word has length 28 [2021-11-06 14:15:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:19,483 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2176 transitions. [2021-11-06 14:15:19,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2176 transitions. [2021-11-06 14:15:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-06 14:15:19,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:19,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:19,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:15:19,485 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:19,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:19,486 INFO L85 PathProgramCache]: Analyzing trace with hash -376497341, now seen corresponding path program 1 times [2021-11-06 14:15:19,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:19,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146630651] [2021-11-06 14:15:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:19,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:15:19,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:19,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146630651] [2021-11-06 14:15:19,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146630651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:19,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:19,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:15:19,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703747396] [2021-11-06 14:15:19,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:19,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:19,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:19,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,543 INFO L87 Difference]: Start difference. First operand 1642 states and 2176 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 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) [2021-11-06 14:15:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:19,577 INFO L93 Difference]: Finished difference Result 1642 states and 2176 transitions. [2021-11-06 14:15:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 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 [2021-11-06 14:15:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:19,582 INFO L225 Difference]: With dead ends: 1642 [2021-11-06 14:15:19,582 INFO L226 Difference]: Without dead ends: 1640 [2021-11-06 14:15:19,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-06 14:15:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2021-11-06 14:15:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1586 states have (on average 1.3203026481715006) internal successors, (2094), 1591 states have internal predecessors, (2094), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-06 14:15:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2174 transitions. [2021-11-06 14:15:19,629 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2174 transitions. Word has length 29 [2021-11-06 14:15:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:19,629 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 2174 transitions. [2021-11-06 14:15:19,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 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) [2021-11-06 14:15:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2174 transitions. [2021-11-06 14:15:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-06 14:15:19,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:19,631 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:19,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:15:19,631 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:19,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1213483970, now seen corresponding path program 1 times [2021-11-06 14:15:19,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:19,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529095268] [2021-11-06 14:15:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:19,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:15:19,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:19,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529095268] [2021-11-06 14:15:19,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529095268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:19,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:19,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:15:19,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662315115] [2021-11-06 14:15:19,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:19,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,710 INFO L87 Difference]: Start difference. First operand 1640 states and 2174 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:19,756 INFO L93 Difference]: Finished difference Result 1640 states and 2174 transitions. [2021-11-06 14:15:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:19,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 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 30 [2021-11-06 14:15:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:19,779 INFO L225 Difference]: With dead ends: 1640 [2021-11-06 14:15:19,779 INFO L226 Difference]: Without dead ends: 1631 [2021-11-06 14:15:19,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-11-06 14:15:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1631. [2021-11-06 14:15:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1578 states have (on average 1.320025348542459) internal successors, (2083), 1582 states have internal predecessors, (2083), 32 states have call successors, (32), 20 states have call predecessors, (32), 20 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-06 14:15:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2163 transitions. [2021-11-06 14:15:19,837 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2163 transitions. Word has length 30 [2021-11-06 14:15:19,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:19,837 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2163 transitions. [2021-11-06 14:15:19,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2163 transitions. [2021-11-06 14:15:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-06 14:15:19,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:19,843 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:19,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:15:19,844 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2139707916, now seen corresponding path program 1 times [2021-11-06 14:15:19,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:19,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526227503] [2021-11-06 14:15:19,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:19,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:15:19,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:19,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526227503] [2021-11-06 14:15:19,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526227503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:19,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:19,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:15:19,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879643090] [2021-11-06 14:15:19,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:19,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:19,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:19,959 INFO L87 Difference]: Start difference. First operand 1631 states and 2163 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:20,080 INFO L93 Difference]: Finished difference Result 4178 states and 5567 transitions. [2021-11-06 14:15:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-06 14:15:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:20,090 INFO L225 Difference]: With dead ends: 4178 [2021-11-06 14:15:20,090 INFO L226 Difference]: Without dead ends: 2565 [2021-11-06 14:15:20,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-11-06 14:15:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2557. [2021-11-06 14:15:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2452 states have (on average 1.3270799347471451) internal successors, (3254), 2460 states have internal predecessors, (3254), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3414 transitions. [2021-11-06 14:15:20,212 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3414 transitions. Word has length 87 [2021-11-06 14:15:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:20,212 INFO L470 AbstractCegarLoop]: Abstraction has 2557 states and 3414 transitions. [2021-11-06 14:15:20,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3414 transitions. [2021-11-06 14:15:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-06 14:15:20,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:20,217 INFO L513 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] [2021-11-06 14:15:20,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:15:20,218 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:20,219 INFO L85 PathProgramCache]: Analyzing trace with hash -413485961, now seen corresponding path program 1 times [2021-11-06 14:15:20,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:20,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804802878] [2021-11-06 14:15:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:20,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:20,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:20,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804802878] [2021-11-06 14:15:20,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804802878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:20,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:20,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:15:20,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178647533] [2021-11-06 14:15:20,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:20,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:20,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:20,344 INFO L87 Difference]: Start difference. First operand 2557 states and 3414 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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) [2021-11-06 14:15:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:20,461 INFO L93 Difference]: Finished difference Result 5100 states and 6815 transitions. [2021-11-06 14:15:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:20,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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 95 [2021-11-06 14:15:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:20,472 INFO L225 Difference]: With dead ends: 5100 [2021-11-06 14:15:20,473 INFO L226 Difference]: Without dead ends: 2561 [2021-11-06 14:15:20,479 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-11-06 14:15:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2561. [2021-11-06 14:15:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2456 states have (on average 1.3265472312703583) internal successors, (3258), 2464 states have internal predecessors, (3258), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:20,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 3418 transitions. [2021-11-06 14:15:20,574 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 3418 transitions. Word has length 95 [2021-11-06 14:15:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:20,574 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 3418 transitions. [2021-11-06 14:15:20,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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) [2021-11-06 14:15:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 3418 transitions. [2021-11-06 14:15:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-06 14:15:20,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:20,578 INFO L513 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] [2021-11-06 14:15:20,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:15:20,578 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:20,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1514786741, now seen corresponding path program 1 times [2021-11-06 14:15:20,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:20,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029613618] [2021-11-06 14:15:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:20,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:20,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:20,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029613618] [2021-11-06 14:15:20,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029613618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:20,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:20,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:15:20,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272080763] [2021-11-06 14:15:20,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:15:20,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:20,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:15:20,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:20,688 INFO L87 Difference]: Start difference. First operand 2561 states and 3418 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2021-11-06 14:15:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:21,012 INFO L93 Difference]: Finished difference Result 8529 states and 11530 transitions. [2021-11-06 14:15:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:15:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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 95 [2021-11-06 14:15:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:21,032 INFO L225 Difference]: With dead ends: 8529 [2021-11-06 14:15:21,033 INFO L226 Difference]: Without dead ends: 5986 [2021-11-06 14:15:21,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:15:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-11-06 14:15:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 2573. [2021-11-06 14:15:21,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2468 states have (on average 1.3249594813614263) internal successors, (3270), 2476 states have internal predecessors, (3270), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 3430 transitions. [2021-11-06 14:15:21,155 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 3430 transitions. Word has length 95 [2021-11-06 14:15:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:21,155 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 3430 transitions. [2021-11-06 14:15:21,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 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) [2021-11-06 14:15:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 3430 transitions. [2021-11-06 14:15:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-06 14:15:21,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:21,159 INFO L513 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] [2021-11-06 14:15:21,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 14:15:21,159 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:21,160 INFO L85 PathProgramCache]: Analyzing trace with hash -95826638, now seen corresponding path program 1 times [2021-11-06 14:15:21,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:21,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711871783] [2021-11-06 14:15:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:21,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:21,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:21,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711871783] [2021-11-06 14:15:21,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711871783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:21,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:21,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:15:21,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093404254] [2021-11-06 14:15:21,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:15:21,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:15:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:15:21,274 INFO L87 Difference]: Start difference. First operand 2573 states and 3430 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:21,494 INFO L93 Difference]: Finished difference Result 6631 states and 8884 transitions. [2021-11-06 14:15:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:15:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 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 101 [2021-11-06 14:15:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:21,510 INFO L225 Difference]: With dead ends: 6631 [2021-11-06 14:15:21,510 INFO L226 Difference]: Without dead ends: 4068 [2021-11-06 14:15:21,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:21,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2021-11-06 14:15:21,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 2573. [2021-11-06 14:15:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2468 states have (on average 1.3233387358184765) internal successors, (3266), 2476 states have internal predecessors, (3266), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 3426 transitions. [2021-11-06 14:15:21,618 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 3426 transitions. Word has length 101 [2021-11-06 14:15:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:21,618 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 3426 transitions. [2021-11-06 14:15:21,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 3426 transitions. [2021-11-06 14:15:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 14:15:21,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:21,622 INFO L513 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] [2021-11-06 14:15:21,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 14:15:21,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash -684740018, now seen corresponding path program 1 times [2021-11-06 14:15:21,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:21,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156284251] [2021-11-06 14:15:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:21,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:21,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:21,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156284251] [2021-11-06 14:15:21,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156284251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:21,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:21,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:15:21,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843780210] [2021-11-06 14:15:21,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:15:21,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:21,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:15:21,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:21,818 INFO L87 Difference]: Start difference. First operand 2573 states and 3426 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:22,095 INFO L93 Difference]: Finished difference Result 7694 states and 10341 transitions. [2021-11-06 14:15:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:15:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 103 [2021-11-06 14:15:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:22,121 INFO L225 Difference]: With dead ends: 7694 [2021-11-06 14:15:22,122 INFO L226 Difference]: Without dead ends: 5139 [2021-11-06 14:15:22,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:15:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2021-11-06 14:15:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 2585. [2021-11-06 14:15:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2480 states have (on average 1.321774193548387) internal successors, (3278), 2488 states have internal predecessors, (3278), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3438 transitions. [2021-11-06 14:15:22,242 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3438 transitions. Word has length 103 [2021-11-06 14:15:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:22,242 INFO L470 AbstractCegarLoop]: Abstraction has 2585 states and 3438 transitions. [2021-11-06 14:15:22,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3438 transitions. [2021-11-06 14:15:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-06 14:15:22,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:22,246 INFO L513 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] [2021-11-06 14:15:22,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 14:15:22,246 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:22,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1980304342, now seen corresponding path program 1 times [2021-11-06 14:15:22,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:22,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13888578] [2021-11-06 14:15:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:22,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:22,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:22,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13888578] [2021-11-06 14:15:22,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13888578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:22,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:22,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:15:22,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450902428] [2021-11-06 14:15:22,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:15:22,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:22,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:15:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:22,362 INFO L87 Difference]: Start difference. First operand 2585 states and 3438 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:22,864 INFO L93 Difference]: Finished difference Result 9796 states and 13227 transitions. [2021-11-06 14:15:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:15:22,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 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 105 [2021-11-06 14:15:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:22,884 INFO L225 Difference]: With dead ends: 9796 [2021-11-06 14:15:22,884 INFO L226 Difference]: Without dead ends: 7229 [2021-11-06 14:15:22,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:15:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7229 states. [2021-11-06 14:15:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7229 to 2597. [2021-11-06 14:15:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2492 states have (on average 1.3202247191011236) internal successors, (3290), 2500 states have internal predecessors, (3290), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3450 transitions. [2021-11-06 14:15:23,062 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3450 transitions. Word has length 105 [2021-11-06 14:15:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:23,063 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 3450 transitions. [2021-11-06 14:15:23,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3450 transitions. [2021-11-06 14:15:23,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-06 14:15:23,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:23,066 INFO L513 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] [2021-11-06 14:15:23,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 14:15:23,067 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:23,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:23,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1864851898, now seen corresponding path program 1 times [2021-11-06 14:15:23,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:23,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498211914] [2021-11-06 14:15:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:23,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:23,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:23,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498211914] [2021-11-06 14:15:23,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498211914] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:23,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:23,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 14:15:23,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279102014] [2021-11-06 14:15:23,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:15:23,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:15:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:15:23,176 INFO L87 Difference]: Start difference. First operand 2597 states and 3450 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:23,588 INFO L93 Difference]: Finished difference Result 8805 states and 11838 transitions. [2021-11-06 14:15:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:15:23,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 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 107 [2021-11-06 14:15:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:23,601 INFO L225 Difference]: With dead ends: 8805 [2021-11-06 14:15:23,602 INFO L226 Difference]: Without dead ends: 6226 [2021-11-06 14:15:23,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:15:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6226 states. [2021-11-06 14:15:23,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6226 to 2613. [2021-11-06 14:15:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2508 states have (on average 1.3181818181818181) internal successors, (3306), 2516 states have internal predecessors, (3306), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3466 transitions. [2021-11-06 14:15:23,745 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3466 transitions. Word has length 107 [2021-11-06 14:15:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:23,745 INFO L470 AbstractCegarLoop]: Abstraction has 2613 states and 3466 transitions. [2021-11-06 14:15:23,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3466 transitions. [2021-11-06 14:15:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-06 14:15:23,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:23,749 INFO L513 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] [2021-11-06 14:15:23,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 14:15:23,749 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:23,750 INFO L85 PathProgramCache]: Analyzing trace with hash -691380734, now seen corresponding path program 1 times [2021-11-06 14:15:23,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:23,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495541163] [2021-11-06 14:15:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:23,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:23,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:23,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495541163] [2021-11-06 14:15:23,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495541163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:23,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:23,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:15:23,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087231745] [2021-11-06 14:15:23,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:23,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:23,840 INFO L87 Difference]: Start difference. First operand 2613 states and 3466 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:24,086 INFO L93 Difference]: Finished difference Result 6519 states and 8684 transitions. [2021-11-06 14:15:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:24,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 109 [2021-11-06 14:15:24,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:24,097 INFO L225 Difference]: With dead ends: 6519 [2021-11-06 14:15:24,097 INFO L226 Difference]: Without dead ends: 3924 [2021-11-06 14:15:24,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:15:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3924 states. [2021-11-06 14:15:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3924 to 2601. [2021-11-06 14:15:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2496 states have (on average 1.3149038461538463) internal successors, (3282), 2504 states have internal predecessors, (3282), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 3442 transitions. [2021-11-06 14:15:24,253 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 3442 transitions. Word has length 109 [2021-11-06 14:15:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:24,253 INFO L470 AbstractCegarLoop]: Abstraction has 2601 states and 3442 transitions. [2021-11-06 14:15:24,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 3442 transitions. [2021-11-06 14:15:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-06 14:15:24,258 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:24,258 INFO L513 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] [2021-11-06 14:15:24,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 14:15:24,258 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1209705982, now seen corresponding path program 1 times [2021-11-06 14:15:24,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:24,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136640901] [2021-11-06 14:15:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:24,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:24,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:24,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136640901] [2021-11-06 14:15:24,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136640901] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:24,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:24,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:15:24,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353382924] [2021-11-06 14:15:24,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:15:24,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:24,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:15:24,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:15:24,375 INFO L87 Difference]: Start difference. First operand 2601 states and 3442 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:24,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:24,867 INFO L93 Difference]: Finished difference Result 9205 states and 12302 transitions. [2021-11-06 14:15:24,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:15:24,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 109 [2021-11-06 14:15:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:24,880 INFO L225 Difference]: With dead ends: 9205 [2021-11-06 14:15:24,880 INFO L226 Difference]: Without dead ends: 6622 [2021-11-06 14:15:24,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6622 states. [2021-11-06 14:15:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6622 to 2633. [2021-11-06 14:15:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2528 states have (on average 1.3140822784810127) internal successors, (3322), 2536 states have internal predecessors, (3322), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 3482 transitions. [2021-11-06 14:15:25,032 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 3482 transitions. Word has length 109 [2021-11-06 14:15:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:25,032 INFO L470 AbstractCegarLoop]: Abstraction has 2633 states and 3482 transitions. [2021-11-06 14:15:25,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 3482 transitions. [2021-11-06 14:15:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-06 14:15:25,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:25,036 INFO L513 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] [2021-11-06 14:15:25,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 14:15:25,037 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:25,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:25,037 INFO L85 PathProgramCache]: Analyzing trace with hash -559598042, now seen corresponding path program 1 times [2021-11-06 14:15:25,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:25,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030141609] [2021-11-06 14:15:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:25,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:25,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:25,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030141609] [2021-11-06 14:15:25,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030141609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:25,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:25,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:15:25,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567549985] [2021-11-06 14:15:25,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:15:25,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:25,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:15:25,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:15:25,179 INFO L87 Difference]: Start difference. First operand 2633 states and 3482 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:25,637 INFO L93 Difference]: Finished difference Result 6575 states and 8744 transitions. [2021-11-06 14:15:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:15:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 111 [2021-11-06 14:15:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:25,646 INFO L225 Difference]: With dead ends: 6575 [2021-11-06 14:15:25,646 INFO L226 Difference]: Without dead ends: 3960 [2021-11-06 14:15:25,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:25,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2021-11-06 14:15:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 2637. [2021-11-06 14:15:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2637 states, 2532 states have (on average 1.3135860979462874) internal successors, (3326), 2540 states have internal predecessors, (3326), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:25,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2637 states to 2637 states and 3486 transitions. [2021-11-06 14:15:25,842 INFO L78 Accepts]: Start accepts. Automaton has 2637 states and 3486 transitions. Word has length 111 [2021-11-06 14:15:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:25,842 INFO L470 AbstractCegarLoop]: Abstraction has 2637 states and 3486 transitions. [2021-11-06 14:15:25,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:25,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2637 states and 3486 transitions. [2021-11-06 14:15:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-06 14:15:25,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:25,845 INFO L513 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] [2021-11-06 14:15:25,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 14:15:25,846 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:25,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1932447274, now seen corresponding path program 1 times [2021-11-06 14:15:25,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:25,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160960350] [2021-11-06 14:15:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:25,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:26,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:26,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160960350] [2021-11-06 14:15:26,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160960350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:26,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671087470] [2021-11-06 14:15:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:26,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:26,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:26,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:26,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 14:15:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:26,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1985 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:15:26,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:26,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671087470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:26,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:26,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-06 14:15:26,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472780827] [2021-11-06 14:15:26,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:15:26,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:15:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:15:26,768 INFO L87 Difference]: Start difference. First operand 2637 states and 3486 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:28,286 INFO L93 Difference]: Finished difference Result 12534 states and 16799 transitions. [2021-11-06 14:15:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:15:28,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 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 112 [2021-11-06 14:15:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:28,311 INFO L225 Difference]: With dead ends: 12534 [2021-11-06 14:15:28,311 INFO L226 Difference]: Without dead ends: 9915 [2021-11-06 14:15:28,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:15:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2021-11-06 14:15:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 2661. [2021-11-06 14:15:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2556 states have (on average 1.31377151799687) internal successors, (3358), 2564 states have internal predecessors, (3358), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 3518 transitions. [2021-11-06 14:15:28,515 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 3518 transitions. Word has length 112 [2021-11-06 14:15:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:28,516 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 3518 transitions. [2021-11-06 14:15:28,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 3518 transitions. [2021-11-06 14:15:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-06 14:15:28,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:28,520 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:28,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:28,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-06 14:15:28,744 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:28,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1599614420, now seen corresponding path program 1 times [2021-11-06 14:15:28,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:28,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676180613] [2021-11-06 14:15:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:28,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:15:28,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:28,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676180613] [2021-11-06 14:15:28,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676180613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:28,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530151382] [2021-11-06 14:15:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:28,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:28,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:28,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:28,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 14:15:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:30,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2035 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:15:30,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:15:30,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530151382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:30,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:30,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 14:15:30,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115303960] [2021-11-06 14:15:30,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:15:30,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:30,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:15:30,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:15:30,812 INFO L87 Difference]: Start difference. First operand 2661 states and 3518 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:31,726 INFO L93 Difference]: Finished difference Result 6647 states and 8840 transitions. [2021-11-06 14:15:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:15:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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 [2021-11-06 14:15:31,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:31,739 INFO L225 Difference]: With dead ends: 6647 [2021-11-06 14:15:31,740 INFO L226 Difference]: Without dead ends: 4004 [2021-11-06 14:15:31,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:15:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4004 states. [2021-11-06 14:15:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4004 to 2665. [2021-11-06 14:15:31,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2560 states have (on average 1.31328125) internal successors, (3362), 2568 states have internal predecessors, (3362), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:31,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 3522 transitions. [2021-11-06 14:15:31,913 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 3522 transitions. Word has length 114 [2021-11-06 14:15:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:31,913 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 3522 transitions. [2021-11-06 14:15:31,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 3522 transitions. [2021-11-06 14:15:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-06 14:15:31,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:31,916 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:31,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:32,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:32,129 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:32,130 INFO L85 PathProgramCache]: Analyzing trace with hash -273263580, now seen corresponding path program 2 times [2021-11-06 14:15:32,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:32,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643060801] [2021-11-06 14:15:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:32,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:15:32,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:32,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643060801] [2021-11-06 14:15:32,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643060801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:32,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550495342] [2021-11-06 14:15:32,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:15:32,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:32,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:32,352 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:32,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 14:15:33,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:15:33,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 2075 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-06 14:15:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:33,513 INFO L354 Elim1Store]: treesize reduction 90, result has 15.9 percent of original size [2021-11-06 14:15:33,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2021-11-06 14:15:33,585 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-06 14:15:33,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 15 [2021-11-06 14:15:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:15:33,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550495342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:33,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:15:33,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2021-11-06 14:15:33,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119284900] [2021-11-06 14:15:33,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:15:33,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:15:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:15:33,718 INFO L87 Difference]: Start difference. First operand 2665 states and 3522 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:36,288 INFO L93 Difference]: Finished difference Result 6282 states and 8355 transitions. [2021-11-06 14:15:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:15:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 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 [2021-11-06 14:15:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:36,295 INFO L225 Difference]: With dead ends: 6282 [2021-11-06 14:15:36,295 INFO L226 Difference]: Without dead ends: 3635 [2021-11-06 14:15:36,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-11-06 14:15:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-11-06 14:15:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3108. [2021-11-06 14:15:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3003 states have (on average 1.319014319014319) internal successors, (3961), 3011 states have internal predecessors, (3961), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4121 transitions. [2021-11-06 14:15:36,502 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4121 transitions. Word has length 115 [2021-11-06 14:15:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:36,502 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4121 transitions. [2021-11-06 14:15:36,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4121 transitions. [2021-11-06 14:15:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-06 14:15:36,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:36,506 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:36,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:36,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:36,728 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:36,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:36,728 INFO L85 PathProgramCache]: Analyzing trace with hash 502842537, now seen corresponding path program 1 times [2021-11-06 14:15:36,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:36,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759072913] [2021-11-06 14:15:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:36,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:15:36,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:36,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759072913] [2021-11-06 14:15:36,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759072913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:36,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441129461] [2021-11-06 14:15:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:36,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:36,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:36,924 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:36,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 14:15:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2083 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 14:15:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:15:39,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441129461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:39,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:39,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-06 14:15:39,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040950168] [2021-11-06 14:15:39,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:15:39,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:15:39,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:15:39,504 INFO L87 Difference]: Start difference. First operand 3108 states and 4121 transitions. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:40,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:40,509 INFO L93 Difference]: Finished difference Result 7098 states and 9447 transitions. [2021-11-06 14:15:40,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:15:40,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 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 117 [2021-11-06 14:15:40,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:40,518 INFO L225 Difference]: With dead ends: 7098 [2021-11-06 14:15:40,518 INFO L226 Difference]: Without dead ends: 4451 [2021-11-06 14:15:40,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:15:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-11-06 14:15:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3112. [2021-11-06 14:15:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 3007 states have (on average 1.3185899567675423) internal successors, (3965), 3015 states have internal predecessors, (3965), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 4125 transitions. [2021-11-06 14:15:40,802 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 4125 transitions. Word has length 117 [2021-11-06 14:15:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:40,803 INFO L470 AbstractCegarLoop]: Abstraction has 3112 states and 4125 transitions. [2021-11-06 14:15:40,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 4125 transitions. [2021-11-06 14:15:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-06 14:15:40,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:40,807 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:40,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:41,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:41,032 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 86546415, now seen corresponding path program 2 times [2021-11-06 14:15:41,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:41,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021211158] [2021-11-06 14:15:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:41,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:15:41,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:41,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021211158] [2021-11-06 14:15:41,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021211158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:41,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598596668] [2021-11-06 14:15:41,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:15:41,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:41,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:41,276 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:41,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 14:15:42,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:15:42,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-06 14:15:42,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:42,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:15:42,578 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-06 14:15:42,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-11-06 14:15:42,646 INFO L354 Elim1Store]: treesize reduction 60, result has 29.4 percent of original size [2021-11-06 14:15:42,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 45 [2021-11-06 14:15:42,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-06 14:15:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:15:42,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598596668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:42,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:42,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-11-06 14:15:42,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481114167] [2021-11-06 14:15:42,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 14:15:42,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 14:15:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:15:42,802 INFO L87 Difference]: Start difference. First operand 3112 states and 4125 transitions. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:47,293 INFO L93 Difference]: Finished difference Result 7637 states and 10192 transitions. [2021-11-06 14:15:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-06 14:15:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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 118 [2021-11-06 14:15:47,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:47,301 INFO L225 Difference]: With dead ends: 7637 [2021-11-06 14:15:47,301 INFO L226 Difference]: Without dead ends: 4986 [2021-11-06 14:15:47,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-11-06 14:15:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4986 states. [2021-11-06 14:15:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4986 to 3120. [2021-11-06 14:15:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3015 states have (on average 1.3177446102819237) internal successors, (3973), 3023 states have internal predecessors, (3973), 64 states have call successors, (64), 40 states have call predecessors, (64), 40 states have return successors, (96), 64 states have call predecessors, (96), 64 states have call successors, (96) [2021-11-06 14:15:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 4133 transitions. [2021-11-06 14:15:47,520 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 4133 transitions. Word has length 118 [2021-11-06 14:15:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:47,520 INFO L470 AbstractCegarLoop]: Abstraction has 3120 states and 4133 transitions. [2021-11-06 14:15:47,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 4133 transitions. [2021-11-06 14:15:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-06 14:15:47,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:47,524 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:47,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:47,747 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,SelfDestructingSolverStorable21 [2021-11-06 14:15:47,748 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1926222702, now seen corresponding path program 3 times [2021-11-06 14:15:47,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:47,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61561258] [2021-11-06 14:15:47,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:47,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:15:47,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:47,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61561258] [2021-11-06 14:15:47,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61561258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:47,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964187615] [2021-11-06 14:15:47,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:15:47,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:47,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:47,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:47,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 14:15:54,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:15:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:54,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 14:15:54,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-06 14:15:54,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964187615] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:54,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:15:54,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-11-06 14:15:54,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242627311] [2021-11-06 14:15:54,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:15:54,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:15:54,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:15:54,334 INFO L87 Difference]: Start difference. First operand 3120 states and 4133 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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) [2021-11-06 14:15:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:55,485 INFO L93 Difference]: Finished difference Result 9692 states and 12951 transitions. [2021-11-06 14:15:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 14:15:55,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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 121 [2021-11-06 14:15:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:55,501 INFO L225 Difference]: With dead ends: 9692 [2021-11-06 14:15:55,501 INFO L226 Difference]: Without dead ends: 7031 [2021-11-06 14:15:55,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:15:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7031 states. [2021-11-06 14:15:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7031 to 4317. [2021-11-06 14:15:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 4160 states have (on average 1.3139423076923078) internal successors, (5466), 4172 states have internal predecessors, (5466), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (128), 96 states have call predecessors, (128), 96 states have call successors, (128) [2021-11-06 14:15:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 5690 transitions. [2021-11-06 14:15:55,929 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 5690 transitions. Word has length 121 [2021-11-06 14:15:55,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:55,929 INFO L470 AbstractCegarLoop]: Abstraction has 4317 states and 5690 transitions. [2021-11-06 14:15:55,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 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) [2021-11-06 14:15:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 5690 transitions. [2021-11-06 14:15:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-06 14:15:55,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:55,933 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:55,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-06 14:15:56,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:56,148 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:15:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1564546992, now seen corresponding path program 1 times [2021-11-06 14:15:56,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:56,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900568561] [2021-11-06 14:15:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:56,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:15:56,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:56,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900568561] [2021-11-06 14:15:56,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900568561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:56,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326562347] [2021-11-06 14:15:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:56,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:56,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:56,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 14:15:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:58,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 14:15:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:15:58,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326562347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:58,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:58,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-06 14:15:58,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472872924] [2021-11-06 14:15:58,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-06 14:15:58,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:58,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-06 14:15:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:15:58,783 INFO L87 Difference]: Start difference. First operand 4317 states and 5690 transitions. Second operand has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:00,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:00,431 INFO L93 Difference]: Finished difference Result 10181 states and 13484 transitions. [2021-11-06 14:16:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:16:00,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 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 131 [2021-11-06 14:16:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:00,443 INFO L225 Difference]: With dead ends: 10181 [2021-11-06 14:16:00,443 INFO L226 Difference]: Without dead ends: 6329 [2021-11-06 14:16:00,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:16:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2021-11-06 14:16:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 4323. [2021-11-06 14:16:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4166 states have (on average 1.313490158425348) internal successors, (5472), 4178 states have internal predecessors, (5472), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (128), 96 states have call predecessors, (128), 96 states have call successors, (128) [2021-11-06 14:16:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 5696 transitions. [2021-11-06 14:16:00,893 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 5696 transitions. Word has length 131 [2021-11-06 14:16:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:00,893 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 5696 transitions. [2021-11-06 14:16:00,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.5) internal successors, (133), 14 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 5696 transitions. [2021-11-06 14:16:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-06 14:16:00,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:00,898 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:00,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 14:16:01,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:01,117 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:01,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:01,118 INFO L85 PathProgramCache]: Analyzing trace with hash -122080340, now seen corresponding path program 2 times [2021-11-06 14:16:01,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:01,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760944286] [2021-11-06 14:16:01,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:01,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:01,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:01,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760944286] [2021-11-06 14:16:01,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760944286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:01,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:01,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 14:16:01,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423844463] [2021-11-06 14:16:01,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:16:01,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:01,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:16:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:16:01,482 INFO L87 Difference]: Start difference. First operand 4323 states and 5696 transitions. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:04,224 INFO L93 Difference]: Finished difference Result 16702 states and 22259 transitions. [2021-11-06 14:16:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-06 14:16:04,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 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 [2021-11-06 14:16:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:04,248 INFO L225 Difference]: With dead ends: 16702 [2021-11-06 14:16:04,248 INFO L226 Difference]: Without dead ends: 12844 [2021-11-06 14:16:04,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=1678, Unknown=0, NotChecked=0, Total=2162 [2021-11-06 14:16:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-11-06 14:16:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 4323. [2021-11-06 14:16:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4166 states have (on average 1.313010081613058) internal successors, (5470), 4178 states have internal predecessors, (5470), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (128), 96 states have call predecessors, (128), 96 states have call successors, (128) [2021-11-06 14:16:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 5694 transitions. [2021-11-06 14:16:04,780 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 5694 transitions. Word has length 132 [2021-11-06 14:16:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:04,780 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 5694 transitions. [2021-11-06 14:16:04,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 5694 transitions. [2021-11-06 14:16:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-06 14:16:04,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:04,784 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:04,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-06 14:16:04,784 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash -786129374, now seen corresponding path program 1 times [2021-11-06 14:16:04,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:04,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826828814] [2021-11-06 14:16:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:04,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:04,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:04,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826828814] [2021-11-06 14:16:04,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826828814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:04,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:04,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:16:04,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066950210] [2021-11-06 14:16:04,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:16:04,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:04,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:16:04,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:16:04,878 INFO L87 Difference]: Start difference. First operand 4323 states and 5694 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:06,014 INFO L93 Difference]: Finished difference Result 12339 states and 16456 transitions. [2021-11-06 14:16:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:16:06,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 [2021-11-06 14:16:06,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:06,028 INFO L225 Difference]: With dead ends: 12339 [2021-11-06 14:16:06,028 INFO L226 Difference]: Without dead ends: 8481 [2021-11-06 14:16:06,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:16:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8481 states. [2021-11-06 14:16:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8481 to 4327. [2021-11-06 14:16:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4170 states have (on average 1.3127098321342925) internal successors, (5474), 4182 states have internal predecessors, (5474), 96 states have call successors, (96), 60 states have call predecessors, (96), 60 states have return successors, (128), 96 states have call predecessors, (128), 96 states have call successors, (128) [2021-11-06 14:16:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5698 transitions. [2021-11-06 14:16:06,511 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5698 transitions. Word has length 137 [2021-11-06 14:16:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:06,512 INFO L470 AbstractCegarLoop]: Abstraction has 4327 states and 5698 transitions. [2021-11-06 14:16:06,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5698 transitions. [2021-11-06 14:16:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-06 14:16:06,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:06,516 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:06,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-06 14:16:06,516 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1926827009, now seen corresponding path program 1 times [2021-11-06 14:16:06,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:06,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334348948] [2021-11-06 14:16:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:06,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:07,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:07,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334348948] [2021-11-06 14:16:07,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334348948] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:07,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:07,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-06 14:16:07,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218582108] [2021-11-06 14:16:07,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:16:07,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:16:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:16:07,220 INFO L87 Difference]: Start difference. First operand 4327 states and 5698 transitions. Second operand has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 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) [2021-11-06 14:16:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:13,087 INFO L93 Difference]: Finished difference Result 21202 states and 28367 transitions. [2021-11-06 14:16:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-06 14:16:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 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 138 [2021-11-06 14:16:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:13,120 INFO L225 Difference]: With dead ends: 21202 [2021-11-06 14:16:13,120 INFO L226 Difference]: Without dead ends: 17310 [2021-11-06 14:16:13,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=951, Invalid=3339, Unknown=0, NotChecked=0, Total=4290 [2021-11-06 14:16:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17310 states. [2021-11-06 14:16:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17310 to 5596. [2021-11-06 14:16:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5387 states have (on average 1.3100055689623167) internal successors, (7057), 5403 states have internal predecessors, (7057), 128 states have call successors, (128), 80 states have call predecessors, (128), 80 states have return successors, (160), 128 states have call predecessors, (160), 128 states have call successors, (160) [2021-11-06 14:16:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 7345 transitions. [2021-11-06 14:16:13,917 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 7345 transitions. Word has length 138 [2021-11-06 14:16:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:13,918 INFO L470 AbstractCegarLoop]: Abstraction has 5596 states and 7345 transitions. [2021-11-06 14:16:13,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.727272727272727) internal successors, (129), 11 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) [2021-11-06 14:16:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 7345 transitions. [2021-11-06 14:16:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-06 14:16:13,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:13,922 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:13,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-06 14:16:13,923 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash -984688816, now seen corresponding path program 1 times [2021-11-06 14:16:13,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:13,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213037257] [2021-11-06 14:16:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:13,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:14,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:14,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213037257] [2021-11-06 14:16:14,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213037257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:14,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:14,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:16:14,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677466028] [2021-11-06 14:16:14,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:16:14,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:14,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:16:14,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:16:14,054 INFO L87 Difference]: Start difference. First operand 5596 states and 7345 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:15,813 INFO L93 Difference]: Finished difference Result 18440 states and 24329 transitions. [2021-11-06 14:16:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:16:15,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 [2021-11-06 14:16:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:15,842 INFO L225 Difference]: With dead ends: 18440 [2021-11-06 14:16:15,842 INFO L226 Difference]: Without dead ends: 13309 [2021-11-06 14:16:15,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:16:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13309 states. [2021-11-06 14:16:16,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13309 to 5612. [2021-11-06 14:16:16,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5612 states, 5403 states have (on average 1.3090875439570608) internal successors, (7073), 5419 states have internal predecessors, (7073), 128 states have call successors, (128), 80 states have call predecessors, (128), 80 states have return successors, (160), 128 states have call predecessors, (160), 128 states have call successors, (160) [2021-11-06 14:16:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5612 states to 5612 states and 7361 transitions. [2021-11-06 14:16:16,651 INFO L78 Accepts]: Start accepts. Automaton has 5612 states and 7361 transitions. Word has length 139 [2021-11-06 14:16:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:16,651 INFO L470 AbstractCegarLoop]: Abstraction has 5612 states and 7361 transitions. [2021-11-06 14:16:16,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5612 states and 7361 transitions. [2021-11-06 14:16:16,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-06 14:16:16,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:16,655 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:16,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-06 14:16:16,656 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:16,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:16,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1685753394, now seen corresponding path program 1 times [2021-11-06 14:16:16,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:16,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986175148] [2021-11-06 14:16:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:16,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:16,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:16,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986175148] [2021-11-06 14:16:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986175148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:16,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805198933] [2021-11-06 14:16:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:16,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:16,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:16,820 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) [2021-11-06 14:16:16,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 14:16:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:17,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 2434 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:16:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:16:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:17,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805198933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:17,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:16:17,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-06 14:16:17,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898219562] [2021-11-06 14:16:17,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:16:17,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:16:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:16:17,877 INFO L87 Difference]: Start difference. First operand 5612 states and 7361 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:20,035 INFO L93 Difference]: Finished difference Result 16801 states and 22041 transitions. [2021-11-06 14:16:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:16:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 [2021-11-06 14:16:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:20,077 INFO L225 Difference]: With dead ends: 16801 [2021-11-06 14:16:20,077 INFO L226 Difference]: Without dead ends: 16796 [2021-11-06 14:16:20,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:16:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16796 states. [2021-11-06 14:16:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16796 to 16544. [2021-11-06 14:16:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16544 states, 15919 states have (on average 1.3133362648407563) internal successors, (20907), 15967 states have internal predecessors, (20907), 384 states have call successors, (384), 240 states have call predecessors, (384), 240 states have return successors, (480), 384 states have call predecessors, (480), 384 states have call successors, (480) [2021-11-06 14:16:22,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16544 states to 16544 states and 21771 transitions. [2021-11-06 14:16:22,206 INFO L78 Accepts]: Start accepts. Automaton has 16544 states and 21771 transitions. Word has length 139 [2021-11-06 14:16:22,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:22,207 INFO L470 AbstractCegarLoop]: Abstraction has 16544 states and 21771 transitions. [2021-11-06 14:16:22,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:22,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16544 states and 21771 transitions. [2021-11-06 14:16:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-06 14:16:22,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:22,222 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:22,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 14:16:22,444 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 [2021-11-06 14:16:22,444 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1023431674, now seen corresponding path program 1 times [2021-11-06 14:16:22,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:22,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505831476] [2021-11-06 14:16:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:22,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:22,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:22,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505831476] [2021-11-06 14:16:22,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505831476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:22,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:22,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:16:22,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508975426] [2021-11-06 14:16:22,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:16:22,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:22,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:16:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:16:22,580 INFO L87 Difference]: Start difference. First operand 16544 states and 21771 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2021-11-06 14:16:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:24,913 INFO L93 Difference]: Finished difference Result 33070 states and 43521 transitions. [2021-11-06 14:16:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:16:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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 146 [2021-11-06 14:16:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:24,944 INFO L225 Difference]: With dead ends: 33070 [2021-11-06 14:16:24,944 INFO L226 Difference]: Without dead ends: 14190 [2021-11-06 14:16:24,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:16:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14190 states. [2021-11-06 14:16:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14190 to 14190. [2021-11-06 14:16:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14190 states, 13682 states have (on average 1.3036105832480631) internal successors, (17836), 13721 states have internal predecessors, (17836), 312 states have call successors, (312), 195 states have call predecessors, (312), 195 states have return successors, (384), 312 states have call predecessors, (384), 312 states have call successors, (384) [2021-11-06 14:16:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14190 states to 14190 states and 18532 transitions. [2021-11-06 14:16:26,931 INFO L78 Accepts]: Start accepts. Automaton has 14190 states and 18532 transitions. Word has length 146 [2021-11-06 14:16:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:26,931 INFO L470 AbstractCegarLoop]: Abstraction has 14190 states and 18532 transitions. [2021-11-06 14:16:26,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2021-11-06 14:16:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14190 states and 18532 transitions. [2021-11-06 14:16:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-06 14:16:26,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:26,943 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:26,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-06 14:16:26,943 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash -76393788, now seen corresponding path program 1 times [2021-11-06 14:16:26,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:26,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76633188] [2021-11-06 14:16:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:26,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:26,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:26,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76633188] [2021-11-06 14:16:26,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76633188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:26,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:26,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:16:26,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657905254] [2021-11-06 14:16:26,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:16:26,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:26,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:16:26,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:16:26,998 INFO L87 Difference]: Start difference. First operand 14190 states and 18532 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2021-11-06 14:16:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:28,019 INFO L93 Difference]: Finished difference Result 21043 states and 27466 transitions. [2021-11-06 14:16:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:16:28,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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 146 [2021-11-06 14:16:28,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:28,034 INFO L225 Difference]: With dead ends: 21043 [2021-11-06 14:16:28,035 INFO L226 Difference]: Without dead ends: 6865 [2021-11-06 14:16:28,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:16:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6865 states. [2021-11-06 14:16:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6865 to 6865. [2021-11-06 14:16:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6865 states, 6630 states have (on average 1.3018099547511313) internal successors, (8631), 6648 states have internal predecessors, (8631), 144 states have call successors, (144), 90 states have call predecessors, (144), 90 states have return successors, (168), 144 states have call predecessors, (168), 144 states have call successors, (168) [2021-11-06 14:16:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6865 states to 6865 states and 8943 transitions. [2021-11-06 14:16:28,963 INFO L78 Accepts]: Start accepts. Automaton has 6865 states and 8943 transitions. Word has length 146 [2021-11-06 14:16:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:28,963 INFO L470 AbstractCegarLoop]: Abstraction has 6865 states and 8943 transitions. [2021-11-06 14:16:28,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2021-11-06 14:16:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6865 states and 8943 transitions. [2021-11-06 14:16:28,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-06 14:16:28,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:28,969 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:28,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-06 14:16:28,970 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1215320699, now seen corresponding path program 1 times [2021-11-06 14:16:28,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:28,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481577084] [2021-11-06 14:16:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:28,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:29,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:29,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481577084] [2021-11-06 14:16:29,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481577084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:29,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:29,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:16:29,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698035046] [2021-11-06 14:16:29,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:16:29,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:16:29,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:16:29,035 INFO L87 Difference]: Start difference. First operand 6865 states and 8943 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:30,567 INFO L93 Difference]: Finished difference Result 15840 states and 20766 transitions. [2021-11-06 14:16:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:16:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 151 [2021-11-06 14:16:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:30,584 INFO L225 Difference]: With dead ends: 15840 [2021-11-06 14:16:30,584 INFO L226 Difference]: Without dead ends: 10011 [2021-11-06 14:16:30,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:16:30,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10011 states. [2021-11-06 14:16:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10011 to 10010. [2021-11-06 14:16:31,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10010 states, 9619 states have (on average 1.3133381848424992) internal successors, (12633), 9649 states have internal predecessors, (12633), 240 states have call successors, (240), 150 states have call predecessors, (240), 150 states have return successors, (288), 240 states have call predecessors, (288), 240 states have call successors, (288) [2021-11-06 14:16:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10010 states to 10010 states and 13161 transitions. [2021-11-06 14:16:31,863 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 13161 transitions. Word has length 151 [2021-11-06 14:16:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:31,863 INFO L470 AbstractCegarLoop]: Abstraction has 10010 states and 13161 transitions. [2021-11-06 14:16:31,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:31,864 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 13161 transitions. [2021-11-06 14:16:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-06 14:16:31,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:31,870 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:31,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-06 14:16:31,870 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash -681447487, now seen corresponding path program 1 times [2021-11-06 14:16:31,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:31,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667764612] [2021-11-06 14:16:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:31,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:32,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:32,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667764612] [2021-11-06 14:16:32,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667764612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:32,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:32,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:16:32,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099642895] [2021-11-06 14:16:32,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:16:32,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:16:32,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:16:32,046 INFO L87 Difference]: Start difference. First operand 10010 states and 13161 transitions. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:37,002 INFO L93 Difference]: Finished difference Result 37226 states and 49570 transitions. [2021-11-06 14:16:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:16:37,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 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 151 [2021-11-06 14:16:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:37,053 INFO L225 Difference]: With dead ends: 37226 [2021-11-06 14:16:37,053 INFO L226 Difference]: Without dead ends: 28901 [2021-11-06 14:16:37,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:16:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28901 states. [2021-11-06 14:16:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28901 to 10019. [2021-11-06 14:16:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10019 states, 9628 states have (on average 1.3130452845866223) internal successors, (12642), 9658 states have internal predecessors, (12642), 240 states have call successors, (240), 150 states have call predecessors, (240), 150 states have return successors, (288), 240 states have call predecessors, (288), 240 states have call successors, (288) [2021-11-06 14:16:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10019 states to 10019 states and 13170 transitions. [2021-11-06 14:16:38,540 INFO L78 Accepts]: Start accepts. Automaton has 10019 states and 13170 transitions. Word has length 151 [2021-11-06 14:16:38,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:38,540 INFO L470 AbstractCegarLoop]: Abstraction has 10019 states and 13170 transitions. [2021-11-06 14:16:38,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 10019 states and 13170 transitions. [2021-11-06 14:16:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-06 14:16:38,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:38,548 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:38,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-06 14:16:38,548 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:38,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:38,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1862258395, now seen corresponding path program 1 times [2021-11-06 14:16:38,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:38,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688752845] [2021-11-06 14:16:38,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:38,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:16:38,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:38,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688752845] [2021-11-06 14:16:38,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688752845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:38,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:16:38,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:16:38,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181318798] [2021-11-06 14:16:38,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:16:38,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:16:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:16:38,679 INFO L87 Difference]: Start difference. First operand 10019 states and 13170 transitions. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:42,917 INFO L93 Difference]: Finished difference Result 32661 states and 43350 transitions. [2021-11-06 14:16:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:16:42,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 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 153 [2021-11-06 14:16:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:42,959 INFO L225 Difference]: With dead ends: 32661 [2021-11-06 14:16:42,959 INFO L226 Difference]: Without dead ends: 24327 [2021-11-06 14:16:42,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:16:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24327 states. [2021-11-06 14:16:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24327 to 10028. [2021-11-06 14:16:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10028 states, 9637 states have (on average 1.3127529314101898) internal successors, (12651), 9667 states have internal predecessors, (12651), 240 states have call successors, (240), 150 states have call predecessors, (240), 150 states have return successors, (288), 240 states have call predecessors, (288), 240 states have call successors, (288) [2021-11-06 14:16:44,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10028 states to 10028 states and 13179 transitions. [2021-11-06 14:16:44,411 INFO L78 Accepts]: Start accepts. Automaton has 10028 states and 13179 transitions. Word has length 153 [2021-11-06 14:16:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:44,411 INFO L470 AbstractCegarLoop]: Abstraction has 10028 states and 13179 transitions. [2021-11-06 14:16:44,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 10028 states and 13179 transitions. [2021-11-06 14:16:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-06 14:16:44,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:44,419 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:44,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-06 14:16:44,419 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1683875607, now seen corresponding path program 1 times [2021-11-06 14:16:44,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:44,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991551504] [2021-11-06 14:16:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:44,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-06 14:16:45,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:45,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991551504] [2021-11-06 14:16:45,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991551504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:45,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542199648] [2021-11-06 14:16:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:45,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:45,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:45,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:16:45,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 14:18:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:26,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-06 14:18:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:18:27,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-06 14:18:27,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-06 14:18:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-06 14:18:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:18:27,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-06 14:18:27,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-11-06 14:18:27,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-06 14:18:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 14:18:27,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542199648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:18:27,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:18:27,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [10] total 30 [2021-11-06 14:18:27,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275385409] [2021-11-06 14:18:27,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-06 14:18:27,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:18:27,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-06 14:18:27,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-11-06 14:18:27,973 INFO L87 Difference]: Start difference. First operand 10028 states and 13179 transitions. Second operand has 21 states, 21 states have (on average 6.9523809523809526) internal successors, (146), 21 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) [2021-11-06 14:18:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:18:47,445 INFO L93 Difference]: Finished difference Result 76478 states and 105944 transitions. [2021-11-06 14:18:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-06 14:18:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.9523809523809526) internal successors, (146), 21 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 155 [2021-11-06 14:18:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:18:47,575 INFO L225 Difference]: With dead ends: 76478 [2021-11-06 14:18:47,575 INFO L226 Difference]: Without dead ends: 64538 [2021-11-06 14:18:47,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5013 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2853, Invalid=12897, Unknown=0, NotChecked=0, Total=15750 [2021-11-06 14:18:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64538 states. [2021-11-06 14:18:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64538 to 10169. [2021-11-06 14:18:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10169 states, 9778 states have (on average 1.3119247289834322) internal successors, (12828), 9808 states have internal predecessors, (12828), 240 states have call successors, (240), 150 states have call predecessors, (240), 150 states have return successors, (288), 240 states have call predecessors, (288), 240 states have call successors, (288) [2021-11-06 14:18:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10169 states to 10169 states and 13356 transitions. [2021-11-06 14:18:49,700 INFO L78 Accepts]: Start accepts. Automaton has 10169 states and 13356 transitions. Word has length 155 [2021-11-06 14:18:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:18:49,700 INFO L470 AbstractCegarLoop]: Abstraction has 10169 states and 13356 transitions. [2021-11-06 14:18:49,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.9523809523809526) internal successors, (146), 21 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) [2021-11-06 14:18:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 10169 states and 13356 transitions. [2021-11-06 14:18:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-06 14:18:49,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:18:49,708 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:18:49,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-06 14:18:49,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-06 14:18:49,918 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:18:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:18:49,918 INFO L85 PathProgramCache]: Analyzing trace with hash -345539873, now seen corresponding path program 1 times [2021-11-06 14:18:49,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:18:49,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106669014] [2021-11-06 14:18:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:49,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:18:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:18:50,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:18:50,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106669014] [2021-11-06 14:18:50,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106669014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:18:50,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367681946] [2021-11-06 14:18:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:50,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:18:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:18:50,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:18:50,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-06 14:19:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:32,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 2560 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 14:19:32,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:19:33,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:19:33,808 INFO L354 Elim1Store]: treesize reduction 116, result has 34.8 percent of original size [2021-11-06 14:19:33,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 87 [2021-11-06 14:19:34,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 14:19:34,262 INFO L354 Elim1Store]: treesize reduction 54, result has 59.7 percent of original size [2021-11-06 14:19:34,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 82 treesize of output 146 [2021-11-06 14:19:54,802 WARN L207 SmtUtils]: Spent 19.94 s on a formula simplification that was a NOOP. DAG size: 59 [2021-11-06 14:19:55,112 INFO L354 Elim1Store]: treesize reduction 132, result has 42.6 percent of original size [2021-11-06 14:19:55,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 147 treesize of output 192 [2021-11-06 14:19:56,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-06 14:19:56,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 54 [2021-11-06 14:19:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:19:56,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367681946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:19:56,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:19:56,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-11-06 14:19:56,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366813431] [2021-11-06 14:19:56,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-06 14:19:56,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:19:56,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-06 14:19:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-06 14:19:56,462 INFO L87 Difference]: Start difference. First operand 10169 states and 13356 transitions. Second operand has 21 states, 21 states have (on average 9.285714285714286) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:20:11,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:20:11,612 INFO L93 Difference]: Finished difference Result 21910 states and 29024 transitions. [2021-11-06 14:20:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-06 14:20:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.285714285714286) internal successors, (195), 20 states have internal predecessors, (195), 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 155 [2021-11-06 14:20:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:20:11,648 INFO L225 Difference]: With dead ends: 21910 [2021-11-06 14:20:11,648 INFO L226 Difference]: Without dead ends: 13426 [2021-11-06 14:20:11,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-11-06 14:20:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13426 states. [2021-11-06 14:20:13,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13426 to 10943. [2021-11-06 14:20:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10943 states, 10552 states have (on average 1.3185178165276725) internal successors, (13913), 10582 states have internal predecessors, (13913), 240 states have call successors, (240), 150 states have call predecessors, (240), 150 states have return successors, (288), 240 states have call predecessors, (288), 240 states have call successors, (288) [2021-11-06 14:20:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10943 states to 10943 states and 14441 transitions. [2021-11-06 14:20:13,410 INFO L78 Accepts]: Start accepts. Automaton has 10943 states and 14441 transitions. Word has length 155 [2021-11-06 14:20:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:20:13,410 INFO L470 AbstractCegarLoop]: Abstraction has 10943 states and 14441 transitions. [2021-11-06 14:20:13,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.285714285714286) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:20:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 10943 states and 14441 transitions. [2021-11-06 14:20:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-06 14:20:13,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:20:13,419 INFO L513 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:20:13,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-06 14:20:13,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-06 14:20:13,633 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:20:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:20:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1370505828, now seen corresponding path program 2 times [2021-11-06 14:20:13,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:20:13,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400941438] [2021-11-06 14:20:13,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:20:13,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:20:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:20:14,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:20:14,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400941438] [2021-11-06 14:20:14,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400941438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:20:14,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219948990] [2021-11-06 14:20:14,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:20:14,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:20:14,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:20:14,192 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:20:14,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process Killed by 15