./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--can--usb--ems_usb.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--can--usb--ems_usb.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 be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:13:52,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:13:52,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:13:52,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:13:52,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:13:52,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:13:52,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:13:52,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:13:52,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:13:52,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:13:52,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:13:52,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:13:52,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:13:52,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:13:52,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:13:52,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:13:52,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:13:52,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:13:52,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:13:52,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:13:52,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:13:52,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:13:52,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:13:52,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:13:52,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:13:52,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:13:52,735 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:13:52,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:13:52,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:13:52,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:13:52,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:13:52,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:13:52,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:13:52,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:13:52,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:13:52,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:13:52,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:13:52,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:13:52,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:13:52,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:13:52,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:13:52,743 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:13:52,760 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:13:52,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:13:52,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:13:52,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:13:52,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:13:52,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:13:52,766 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:13:52,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:13:52,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:13:52,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:13:52,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:13:52,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:13:52,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:13:52,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:13:52,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:13:52,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:13:52,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:13:52,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:13:52,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:13:52,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:13:52,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:13:52,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:13:52,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:13:52,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:13:52,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:13:52,769 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:13:52,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:13:52,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:13:52,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:13:52,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2021-11-06 14:13:52,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:13:52,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:13:52,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:13:52,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:13:52,984 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:13:52,985 INFO L432 ainManager$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--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-11-06 14:13:53,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a3d3f22/99205f588f4c4f56b91a6e8f0d4a8019/FLAGdcaa90487 [2021-11-06 14:13:53,533 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:13:53,533 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--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-11-06 14:13:53,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a3d3f22/99205f588f4c4f56b91a6e8f0d4a8019/FLAGdcaa90487 [2021-11-06 14:13:53,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38a3d3f22/99205f588f4c4f56b91a6e8f0d4a8019 [2021-11-06 14:13:53,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:13:53,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:13:53,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:13:53,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:13:53,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:13:53,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:13:53" (1/1) ... [2021-11-06 14:13:53,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603c526c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:53, skipping insertion in model container [2021-11-06 14:13:53,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:13:53" (1/1) ... [2021-11-06 14:13:53,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:13:53,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:13:54,406 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--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2021-11-06 14:13:54,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:13:54,704 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:13:54,782 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--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2021-11-06 14:13:54,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:13:54,941 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:13:54,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54 WrapperNode [2021-11-06 14:13:54,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:13:54,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:13:54,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:13:54,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:13:54,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:54,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:13:55,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:13:55,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:13:55,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:13:55,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:13:55,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:13:55,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:13:55,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:13:55,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:13:55,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:13:55,309 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 14:13:55,327 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 14:13:55,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:13:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2021-11-06 14:13:55,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2021-11-06 14:13:55,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2021-11-06 14:13:55,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2021-11-06 14:13:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:13:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:13:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:13:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2021-11-06 14:13:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2021-11-06 14:13:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-06 14:13:55,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-06 14:13:55,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:13:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:13:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:13:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:13:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 14:13:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 14:13:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:13:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2021-11-06 14:13:55,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2021-11-06 14:13:55,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:13:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:13:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:13:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:13:55,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:13:55,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:14:00,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:14:00,467 INFO L299 CfgBuilder]: Removed 593 assume(true) statements. [2021-11-06 14:14:00,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:14:00 BoogieIcfgContainer [2021-11-06 14:14:00,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:14:00,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:14:00,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:14:00,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:14:00,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:13:53" (1/3) ... [2021-11-06 14:14:00,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4afdd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:14:00, skipping insertion in model container [2021-11-06 14:14:00,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54" (2/3) ... [2021-11-06 14:14:00,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4afdd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:14:00, skipping insertion in model container [2021-11-06 14:14:00,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:14:00" (3/3) ... [2021-11-06 14:14:00,478 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2021-11-06 14:14:00,481 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:14:00,481 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-06 14:14:00,522 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:14:00,526 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 14:14:00,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-06 14:14:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 620 states, 597 states have (on average 1.4321608040201006) internal successors, (855), 604 states have internal predecessors, (855), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-06 14:14:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-06 14:14:00,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:00,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:00,553 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 14:14:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash 990042253, now seen corresponding path program 1 times [2021-11-06 14:14:00,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:00,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102451979] [2021-11-06 14:14:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:00,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:00,902 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 14:14:00,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:00,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102451979] [2021-11-06 14:14:00,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102451979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:00,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:00,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:00,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774582291] [2021-11-06 14:14:00,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:00,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:00,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:00,921 INFO L87 Difference]: Start difference. First operand has 620 states, 597 states have (on average 1.4321608040201006) internal successors, (855), 604 states have internal predecessors, (855), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:14:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:01,860 INFO L93 Difference]: Finished difference Result 1806 states and 2584 transitions. [2021-11-06 14:14:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:01,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-06 14:14:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:01,877 INFO L225 Difference]: With dead ends: 1806 [2021-11-06 14:14:01,877 INFO L226 Difference]: Without dead ends: 1173 [2021-11-06 14:14:01,883 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 14:14:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-11-06 14:14:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1173. [2021-11-06 14:14:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1134 states have (on average 1.3915343915343916) internal successors, (1578), 1142 states have internal predecessors, (1578), 22 states have call successors, (22), 12 states have call predecessors, (22), 12 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-06 14:14:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1622 transitions. [2021-11-06 14:14:01,946 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1622 transitions. Word has length 17 [2021-11-06 14:14:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:01,947 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 1622 transitions. [2021-11-06 14:14:01,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 14:14:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1622 transitions. [2021-11-06 14:14:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-06 14:14:01,948 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:01,948 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] [2021-11-06 14:14:01,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:14:01,949 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 14:14:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1542514015, now seen corresponding path program 1 times [2021-11-06 14:14:01,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:01,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984952015] [2021-11-06 14:14:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:01,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:02,041 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 14:14:02,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:02,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984952015] [2021-11-06 14:14:02,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984952015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:02,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:02,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:02,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089421801] [2021-11-06 14:14:02,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:02,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:02,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:02,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:02,044 INFO L87 Difference]: Start difference. First operand 1173 states and 1622 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 14:14:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:02,159 INFO L93 Difference]: Finished difference Result 3491 states and 4901 transitions. [2021-11-06 14:14:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-06 14:14:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:02,167 INFO L225 Difference]: With dead ends: 3491 [2021-11-06 14:14:02,167 INFO L226 Difference]: Without dead ends: 2331 [2021-11-06 14:14:02,170 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 14:14:02,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-11-06 14:14:02,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 2319. [2021-11-06 14:14:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2246 states have (on average 1.3864648263579697) internal successors, (3114), 2258 states have internal predecessors, (3114), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-06 14:14:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3224 transitions. [2021-11-06 14:14:02,222 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3224 transitions. Word has length 24 [2021-11-06 14:14:02,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:02,223 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 3224 transitions. [2021-11-06 14:14:02,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 0 states have call successors, (0), 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 14:14:02,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3224 transitions. [2021-11-06 14:14:02,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-06 14:14:02,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:02,224 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] [2021-11-06 14:14:02,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:14:02,225 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:14:02,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash -573293837, now seen corresponding path program 1 times [2021-11-06 14:14:02,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:02,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256930547] [2021-11-06 14:14:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:02,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:02,303 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 14:14:02,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:02,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256930547] [2021-11-06 14:14:02,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256930547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:02,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:02,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:02,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517901362] [2021-11-06 14:14:02,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:02,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:02,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:02,306 INFO L87 Difference]: Start difference. First operand 2319 states and 3224 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 14:14:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:02,346 INFO L93 Difference]: Finished difference Result 2319 states and 3224 transitions. [2021-11-06 14:14:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-06 14:14:02,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:02,353 INFO L225 Difference]: With dead ends: 2319 [2021-11-06 14:14:02,353 INFO L226 Difference]: Without dead ends: 2317 [2021-11-06 14:14:02,354 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 14:14:02,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-11-06 14:14:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2317. [2021-11-06 14:14:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2245 states have (on average 1.3861915367483295) internal successors, (3112), 2256 states have internal predecessors, (3112), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-06 14:14:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3222 transitions. [2021-11-06 14:14:02,441 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3222 transitions. Word has length 25 [2021-11-06 14:14:02,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:02,441 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3222 transitions. [2021-11-06 14:14:02,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 14:14:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3222 transitions. [2021-11-06 14:14:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-06 14:14:02,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:02,443 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 14:14:02,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:14:02,443 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:14:02,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash -592239381, now seen corresponding path program 1 times [2021-11-06 14:14:02,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:02,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10037465] [2021-11-06 14:14:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:02,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:02,501 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 14:14:02,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:02,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10037465] [2021-11-06 14:14:02,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10037465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:02,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:02,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:02,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448275393] [2021-11-06 14:14:02,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:02,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:02,503 INFO L87 Difference]: Start difference. First operand 2317 states and 3222 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 14:14:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:02,549 INFO L93 Difference]: Finished difference Result 2317 states and 3222 transitions. [2021-11-06 14:14:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:02,549 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 14:14:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:02,556 INFO L225 Difference]: With dead ends: 2317 [2021-11-06 14:14:02,556 INFO L226 Difference]: Without dead ends: 2315 [2021-11-06 14:14:02,557 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 14:14:02,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-11-06 14:14:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2315. [2021-11-06 14:14:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 2244 states have (on average 1.3859180035650625) internal successors, (3110), 2254 states have internal predecessors, (3110), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-06 14:14:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3220 transitions. [2021-11-06 14:14:02,616 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3220 transitions. Word has length 26 [2021-11-06 14:14:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:02,616 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3220 transitions. [2021-11-06 14:14:02,616 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 14:14:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3220 transitions. [2021-11-06 14:14:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-06 14:14:02,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:02,617 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 14:14:02,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:14:02,618 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:14:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1179551235, now seen corresponding path program 1 times [2021-11-06 14:14:02,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:02,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358499691] [2021-11-06 14:14:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:02,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:02,675 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 14:14:02,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:02,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358499691] [2021-11-06 14:14:02,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358499691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:02,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:02,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:02,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536923358] [2021-11-06 14:14:02,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:02,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:02,677 INFO L87 Difference]: Start difference. First operand 2315 states and 3220 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 14:14:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:02,737 INFO L93 Difference]: Finished difference Result 2315 states and 3220 transitions. [2021-11-06 14:14:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:02,738 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 14:14:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:02,745 INFO L225 Difference]: With dead ends: 2315 [2021-11-06 14:14:02,746 INFO L226 Difference]: Without dead ends: 2313 [2021-11-06 14:14:02,746 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 14:14:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-11-06 14:14:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2313. [2021-11-06 14:14:02,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2243 states have (on average 1.3856442264823896) internal successors, (3108), 2252 states have internal predecessors, (3108), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-06 14:14:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3218 transitions. [2021-11-06 14:14:02,808 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3218 transitions. Word has length 27 [2021-11-06 14:14:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:02,809 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3218 transitions. [2021-11-06 14:14:02,809 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 14:14:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3218 transitions. [2021-11-06 14:14:02,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-06 14:14:02,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:02,812 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 14:14:02,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:14:02,813 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:14:02,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:02,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2088617781, now seen corresponding path program 1 times [2021-11-06 14:14:02,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:02,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114943020] [2021-11-06 14:14:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:02,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:02,944 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 14:14:02,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:02,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114943020] [2021-11-06 14:14:02,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114943020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:02,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:02,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:02,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683559245] [2021-11-06 14:14:02,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:02,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:02,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:02,947 INFO L87 Difference]: Start difference. First operand 2313 states and 3218 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 14:14:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:03,011 INFO L93 Difference]: Finished difference Result 2313 states and 3218 transitions. [2021-11-06 14:14:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:03,011 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 14:14:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:03,019 INFO L225 Difference]: With dead ends: 2313 [2021-11-06 14:14:03,019 INFO L226 Difference]: Without dead ends: 2304 [2021-11-06 14:14:03,020 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 14:14:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-11-06 14:14:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2304. [2021-11-06 14:14:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2235 states have (on average 1.385234899328859) internal successors, (3096), 2243 states have internal predecessors, (3096), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-06 14:14:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3206 transitions. [2021-11-06 14:14:03,111 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3206 transitions. Word has length 28 [2021-11-06 14:14:03,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:03,112 INFO L470 AbstractCegarLoop]: Abstraction has 2304 states and 3206 transitions. [2021-11-06 14:14:03,112 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 14:14:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3206 transitions. [2021-11-06 14:14:03,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-06 14:14:03,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:03,116 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:03,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:14:03,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:14:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:03,117 INFO L85 PathProgramCache]: Analyzing trace with hash 578971499, now seen corresponding path program 1 times [2021-11-06 14:14:03,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:03,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616737375] [2021-11-06 14:14:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:03,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:14:03,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:03,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616737375] [2021-11-06 14:14:03,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616737375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:03,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:03,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:03,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695888623] [2021-11-06 14:14:03,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:03,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:03,184 INFO L87 Difference]: Start difference. First operand 2304 states and 3206 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 14:14:03,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:03,282 INFO L93 Difference]: Finished difference Result 5086 states and 7025 transitions. [2021-11-06 14:14:03,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:03,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-06 14:14:03,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:03,290 INFO L225 Difference]: With dead ends: 5086 [2021-11-06 14:14:03,291 INFO L226 Difference]: Without dead ends: 2795 [2021-11-06 14:14:03,295 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 14:14:03,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-11-06 14:14:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2790. [2021-11-06 14:14:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2721 states have (on average 1.3656743844174937) internal successors, (3716), 2729 states have internal predecessors, (3716), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-06 14:14:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3826 transitions. [2021-11-06 14:14:03,366 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3826 transitions. Word has length 52 [2021-11-06 14:14:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:03,367 INFO L470 AbstractCegarLoop]: Abstraction has 2790 states and 3826 transitions. [2021-11-06 14:14:03,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 14:14:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3826 transitions. [2021-11-06 14:14:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 14:14:03,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:03,381 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:03,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:14:03,381 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 14:14:03,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:03,382 INFO L85 PathProgramCache]: Analyzing trace with hash -587987276, now seen corresponding path program 1 times [2021-11-06 14:14:03,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:03,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837276173] [2021-11-06 14:14:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:03,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:14:03,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:03,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837276173] [2021-11-06 14:14:03,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837276173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:03,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:03,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:03,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608779160] [2021-11-06 14:14:03,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:03,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:03,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:03,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:03,447 INFO L87 Difference]: Start difference. First operand 2790 states and 3826 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 14:14:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:04,788 INFO L93 Difference]: Finished difference Result 6106 states and 8353 transitions. [2021-11-06 14:14:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-11-06 14:14:04,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:04,798 INFO L225 Difference]: With dead ends: 6106 [2021-11-06 14:14:04,798 INFO L226 Difference]: Without dead ends: 3329 [2021-11-06 14:14:04,802 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 14:14:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2021-11-06 14:14:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 3324. [2021-11-06 14:14:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3255 states have (on average 1.3529953917050692) internal successors, (4404), 3263 states have internal predecessors, (4404), 44 states have call successors, (44), 24 states have call predecessors, (44), 24 states have return successors, (66), 40 states have call predecessors, (66), 44 states have call successors, (66) [2021-11-06 14:14:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 4514 transitions. [2021-11-06 14:14:04,881 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 4514 transitions. Word has length 62 [2021-11-06 14:14:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:04,882 INFO L470 AbstractCegarLoop]: Abstraction has 3324 states and 4514 transitions. [2021-11-06 14:14:04,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 14:14:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 4514 transitions. [2021-11-06 14:14:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 14:14:04,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:04,884 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] [2021-11-06 14:14:04,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:14:04,884 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 14:14:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1736719260, now seen corresponding path program 1 times [2021-11-06 14:14:04,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:04,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014521749] [2021-11-06 14:14:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:04,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:04,934 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 14:14:04,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:04,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014521749] [2021-11-06 14:14:04,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014521749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:04,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:04,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:04,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567947026] [2021-11-06 14:14:04,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:04,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:04,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:04,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:04,936 INFO L87 Difference]: Start difference. First operand 3324 states and 4514 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 14:14:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:05,058 INFO L93 Difference]: Finished difference Result 8661 states and 11909 transitions. [2021-11-06 14:14:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-06 14:14:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:05,075 INFO L225 Difference]: With dead ends: 8661 [2021-11-06 14:14:05,075 INFO L226 Difference]: Without dead ends: 5350 [2021-11-06 14:14:05,082 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 14:14:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2021-11-06 14:14:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 5334. [2021-11-06 14:14:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5334 states, 5197 states have (on average 1.3782951702905522) internal successors, (7163), 5213 states have internal predecessors, (7163), 88 states have call successors, (88), 48 states have call predecessors, (88), 48 states have return successors, (132), 80 states have call predecessors, (132), 88 states have call successors, (132) [2021-11-06 14:14:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5334 states to 5334 states and 7383 transitions. [2021-11-06 14:14:05,288 INFO L78 Accepts]: Start accepts. Automaton has 5334 states and 7383 transitions. Word has length 65 [2021-11-06 14:14:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:05,288 INFO L470 AbstractCegarLoop]: Abstraction has 5334 states and 7383 transitions. [2021-11-06 14:14:05,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 14:14:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5334 states and 7383 transitions. [2021-11-06 14:14:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 14:14:05,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:05,292 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-06 14:14:05,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:14:05,292 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 14:14:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash 477742688, now seen corresponding path program 1 times [2021-11-06 14:14:05,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:05,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55238318] [2021-11-06 14:14:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:05,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:14:05,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:05,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55238318] [2021-11-06 14:14:05,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55238318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:05,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:05,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:05,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809773099] [2021-11-06 14:14:05,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:05,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:05,351 INFO L87 Difference]: Start difference. First operand 5334 states and 7383 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:14:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:06,718 INFO L93 Difference]: Finished difference Result 13036 states and 18190 transitions. [2021-11-06 14:14:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-06 14:14:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:06,743 INFO L225 Difference]: With dead ends: 13036 [2021-11-06 14:14:06,744 INFO L226 Difference]: Without dead ends: 7715 [2021-11-06 14:14:06,754 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 14:14:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7715 states. [2021-11-06 14:14:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7715 to 7710. [2021-11-06 14:14:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7710 states, 7461 states have (on average 1.3925747218871465) internal successors, (10390), 7493 states have internal predecessors, (10390), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-06 14:14:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7710 states to 7710 states and 10770 transitions. [2021-11-06 14:14:07,008 INFO L78 Accepts]: Start accepts. Automaton has 7710 states and 10770 transitions. Word has length 74 [2021-11-06 14:14:07,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:07,008 INFO L470 AbstractCegarLoop]: Abstraction has 7710 states and 10770 transitions. [2021-11-06 14:14:07,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 14:14:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 7710 states and 10770 transitions. [2021-11-06 14:14:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-06 14:14:07,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:07,011 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] [2021-11-06 14:14:07,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 14:14:07,012 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 14:14:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:07,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1414744033, now seen corresponding path program 1 times [2021-11-06 14:14:07,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:07,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904495587] [2021-11-06 14:14:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:07,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:07,082 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 14:14:07,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:07,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904495587] [2021-11-06 14:14:07,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904495587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:07,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:07,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:07,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114613442] [2021-11-06 14:14:07,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:07,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:07,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:07,084 INFO L87 Difference]: Start difference. First operand 7710 states and 10770 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:07,235 INFO L93 Difference]: Finished difference Result 15439 states and 21573 transitions. [2021-11-06 14:14:07,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:07,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-06 14:14:07,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:07,257 INFO L225 Difference]: With dead ends: 15439 [2021-11-06 14:14:07,258 INFO L226 Difference]: Without dead ends: 7742 [2021-11-06 14:14:07,273 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 14:14:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7742 states. [2021-11-06 14:14:07,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7742 to 7726. [2021-11-06 14:14:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7477 states have (on average 1.3917346529356693) internal successors, (10406), 7509 states have internal predecessors, (10406), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-06 14:14:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 10786 transitions. [2021-11-06 14:14:07,546 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 10786 transitions. Word has length 75 [2021-11-06 14:14:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:07,546 INFO L470 AbstractCegarLoop]: Abstraction has 7726 states and 10786 transitions. [2021-11-06 14:14:07,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 10786 transitions. [2021-11-06 14:14:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 14:14:07,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:07,550 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] [2021-11-06 14:14:07,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 14:14:07,550 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 14:14:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1473234019, now seen corresponding path program 1 times [2021-11-06 14:14:07,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:07,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130475268] [2021-11-06 14:14:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:07,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:07,618 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 14:14:07,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:07,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130475268] [2021-11-06 14:14:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130475268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:07,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554467648] [2021-11-06 14:14:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:07,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:07,624 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 14:14:07,639 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 14:14:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:08,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:14:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:08,216 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 14:14:08,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554467648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:08,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:08,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 14:14:08,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853187916] [2021-11-06 14:14:08,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:14:08,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:08,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:14:08,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:08,218 INFO L87 Difference]: Start difference. First operand 7726 states and 10786 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 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 14:14:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:08,379 INFO L93 Difference]: Finished difference Result 15487 states and 21621 transitions. [2021-11-06 14:14:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:14:08,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-06 14:14:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:08,402 INFO L225 Difference]: With dead ends: 15487 [2021-11-06 14:14:08,403 INFO L226 Difference]: Without dead ends: 7774 [2021-11-06 14:14:08,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-11-06 14:14:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 7758. [2021-11-06 14:14:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7758 states, 7509 states have (on average 1.3900652550273005) internal successors, (10438), 7541 states have internal predecessors, (10438), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-06 14:14:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7758 states to 7758 states and 10818 transitions. [2021-11-06 14:14:08,718 INFO L78 Accepts]: Start accepts. Automaton has 7758 states and 10818 transitions. Word has length 77 [2021-11-06 14:14:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:08,719 INFO L470 AbstractCegarLoop]: Abstraction has 7758 states and 10818 transitions. [2021-11-06 14:14:08,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 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 14:14:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7758 states and 10818 transitions. [2021-11-06 14:14:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 14:14:08,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:08,727 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:14:08,749 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 14:14:08,946 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,SelfDestructingSolverStorable11 [2021-11-06 14:14:08,947 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 14:14:08,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:08,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2023698521, now seen corresponding path program 2 times [2021-11-06 14:14:08,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:08,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207549603] [2021-11-06 14:14:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:08,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:14:09,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:09,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207549603] [2021-11-06 14:14:09,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207549603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:09,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977330109] [2021-11-06 14:14:09,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:14:09,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:09,058 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 14:14:09,070 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 14:14:10,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:14:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:14:10,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:14:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:10,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977330109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:10,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:10,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-06 14:14:10,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038793693] [2021-11-06 14:14:10,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:14:10,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:14:10,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:14:10,598 INFO L87 Difference]: Start difference. First operand 7758 states and 10818 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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 14:14:12,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:12,154 INFO L93 Difference]: Finished difference Result 24331 states and 33831 transitions. [2021-11-06 14:14:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:14:12,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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 79 [2021-11-06 14:14:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:12,196 INFO L225 Difference]: With dead ends: 24331 [2021-11-06 14:14:12,196 INFO L226 Difference]: Without dead ends: 16586 [2021-11-06 14:14:12,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:14:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16586 states. [2021-11-06 14:14:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16586 to 16174. [2021-11-06 14:14:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16174 states, 15677 states have (on average 1.387829304076035) internal successors, (21757), 15741 states have internal predecessors, (21757), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-06 14:14:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16174 states to 16174 states and 22517 transitions. [2021-11-06 14:14:12,625 INFO L78 Accepts]: Start accepts. Automaton has 16174 states and 22517 transitions. Word has length 79 [2021-11-06 14:14:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:12,626 INFO L470 AbstractCegarLoop]: Abstraction has 16174 states and 22517 transitions. [2021-11-06 14:14:12,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 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 14:14:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 16174 states and 22517 transitions. [2021-11-06 14:14:12,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 14:14:12,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:12,634 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:12,655 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 14:14:12,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-06 14:14:12,847 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 14:14:12,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash 317541271, now seen corresponding path program 1 times [2021-11-06 14:14:12,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:12,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234281744] [2021-11-06 14:14:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:12,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:13,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:13,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234281744] [2021-11-06 14:14:13,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234281744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:13,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135439833] [2021-11-06 14:14:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:13,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:13,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:13,070 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 14:14:13,097 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 14:14:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:14:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:13,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135439833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:13,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:13,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 14:14:13,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702044881] [2021-11-06 14:14:13,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:14:13,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:13,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:14:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:14:13,675 INFO L87 Difference]: Start difference. First operand 16174 states and 22517 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:13,993 INFO L93 Difference]: Finished difference Result 32449 states and 45171 transitions. [2021-11-06 14:14:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:14:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-06 14:14:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:14,040 INFO L225 Difference]: With dead ends: 32449 [2021-11-06 14:14:14,040 INFO L226 Difference]: Without dead ends: 16288 [2021-11-06 14:14:14,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:14:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16288 states. [2021-11-06 14:14:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16288 to 16250. [2021-11-06 14:14:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16250 states, 15753 states have (on average 1.3859582301783788) internal successors, (21833), 15817 states have internal predecessors, (21833), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-06 14:14:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16250 states to 16250 states and 22593 transitions. [2021-11-06 14:14:14,601 INFO L78 Accepts]: Start accepts. Automaton has 16250 states and 22593 transitions. Word has length 81 [2021-11-06 14:14:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:14,601 INFO L470 AbstractCegarLoop]: Abstraction has 16250 states and 22593 transitions. [2021-11-06 14:14:14,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 16250 states and 22593 transitions. [2021-11-06 14:14:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 14:14:14,609 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:14,609 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:14,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-06 14:14:14,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:14,824 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 14:14:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:14,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1964737107, now seen corresponding path program 2 times [2021-11-06 14:14:14,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:14,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387794772] [2021-11-06 14:14:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:14,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:14,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:14,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387794772] [2021-11-06 14:14:14,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387794772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:14,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367565244] [2021-11-06 14:14:14,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:14:14,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:14,935 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 14:14:14,936 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 14:14:16,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:14:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:14:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:14:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:16,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367565244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:16,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:16,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-06 14:14:16,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919918349] [2021-11-06 14:14:16,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:14:16,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:16,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:14:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:14:16,940 INFO L87 Difference]: Start difference. First operand 16250 states and 22593 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:17,371 INFO L93 Difference]: Finished difference Result 32601 states and 45323 transitions. [2021-11-06 14:14:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:14:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-06 14:14:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:17,411 INFO L225 Difference]: With dead ends: 32601 [2021-11-06 14:14:17,412 INFO L226 Difference]: Without dead ends: 16364 [2021-11-06 14:14:17,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:14:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16364 states. [2021-11-06 14:14:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16364 to 16326. [2021-11-06 14:14:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16326 states, 15829 states have (on average 1.3841051235074862) internal successors, (21909), 15893 states have internal predecessors, (21909), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-06 14:14:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16326 states to 16326 states and 22669 transitions. [2021-11-06 14:14:17,788 INFO L78 Accepts]: Start accepts. Automaton has 16326 states and 22669 transitions. Word has length 83 [2021-11-06 14:14:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:17,789 INFO L470 AbstractCegarLoop]: Abstraction has 16326 states and 22669 transitions. [2021-11-06 14:14:17,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 16326 states and 22669 transitions. [2021-11-06 14:14:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-06 14:14:17,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:17,796 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 14:14:17,818 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 14:14:18,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-06 14:14:18,017 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 14:14:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:18,017 INFO L85 PathProgramCache]: Analyzing trace with hash 77003279, now seen corresponding path program 3 times [2021-11-06 14:14:18,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:18,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691119414] [2021-11-06 14:14:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:18,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:18,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:18,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691119414] [2021-11-06 14:14:18,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691119414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:18,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369085060] [2021-11-06 14:14:18,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:14:18,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:18,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:18,129 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 14:14:18,159 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 14:14:20,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:14:20,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:14:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 14:14:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 14:14:20,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369085060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:20,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:14:20,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-06 14:14:20,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273520801] [2021-11-06 14:14:20,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:14:20,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:14:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:14:20,450 INFO L87 Difference]: Start difference. First operand 16326 states and 22669 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:23,524 INFO L93 Difference]: Finished difference Result 52762 states and 72878 transitions. [2021-11-06 14:14:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:14:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-06 14:14:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:23,615 INFO L225 Difference]: With dead ends: 52762 [2021-11-06 14:14:23,615 INFO L226 Difference]: Without dead ends: 36449 [2021-11-06 14:14:23,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:14:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36449 states. [2021-11-06 14:14:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36449 to 16440. [2021-11-06 14:14:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16440 states, 15943 states have (on average 1.3813585899767924) internal successors, (22023), 16007 states have internal predecessors, (22023), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-06 14:14:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16440 states to 16440 states and 22783 transitions. [2021-11-06 14:14:24,455 INFO L78 Accepts]: Start accepts. Automaton has 16440 states and 22783 transitions. Word has length 85 [2021-11-06 14:14:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:24,455 INFO L470 AbstractCegarLoop]: Abstraction has 16440 states and 22783 transitions. [2021-11-06 14:14:24,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 16440 states and 22783 transitions. [2021-11-06 14:14:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-06 14:14:24,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:24,468 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 14:14:24,491 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 14:14:24,683 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,SelfDestructingSolverStorable15 [2021-11-06 14:14:24,683 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 14:14:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash 129601707, now seen corresponding path program 1 times [2021-11-06 14:14:24,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:24,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883838096] [2021-11-06 14:14:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:24,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:24,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:24,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883838096] [2021-11-06 14:14:24,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883838096] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:24,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5867973] [2021-11-06 14:14:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:24,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:24,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:24,836 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 14:14:24,838 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 14:14:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:25,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:14:25,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:25,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5867973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:25,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:25,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-06 14:14:25,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044869738] [2021-11-06 14:14:25,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:14:25,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:25,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:14:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:14:25,509 INFO L87 Difference]: Start difference. First operand 16440 states and 22783 transitions. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 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 14:14:26,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:26,070 INFO L93 Difference]: Finished difference Result 32981 states and 45703 transitions. [2021-11-06 14:14:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 14:14:26,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 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 14:14:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:26,114 INFO L225 Difference]: With dead ends: 32981 [2021-11-06 14:14:26,114 INFO L226 Difference]: Without dead ends: 16554 [2021-11-06 14:14:26,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:14:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16554 states. [2021-11-06 14:14:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16554 to 16516. [2021-11-06 14:14:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16516 states, 16019 states have (on average 1.3795492852237967) internal successors, (22099), 16083 states have internal predecessors, (22099), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-06 14:14:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16516 states to 16516 states and 22859 transitions. [2021-11-06 14:14:26,753 INFO L78 Accepts]: Start accepts. Automaton has 16516 states and 22859 transitions. Word has length 87 [2021-11-06 14:14:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:26,754 INFO L470 AbstractCegarLoop]: Abstraction has 16516 states and 22859 transitions. [2021-11-06 14:14:26,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 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 14:14:26,754 INFO L276 IsEmpty]: Start isEmpty. Operand 16516 states and 22859 transitions. [2021-11-06 14:14:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 14:14:26,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:26,763 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-06 14:14:26,783 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 14:14:26,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-06 14:14:26,984 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 14:14:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1743442535, now seen corresponding path program 2 times [2021-11-06 14:14:26,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:26,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5467841] [2021-11-06 14:14:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:26,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:27,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:27,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5467841] [2021-11-06 14:14:27,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5467841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:27,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192376678] [2021-11-06 14:14:27,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:14:27,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:27,117 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 14:14:27,118 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 14:14:28,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:14:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:14:28,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 14:14:28,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:29,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192376678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:29,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:29,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-06 14:14:29,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854103135] [2021-11-06 14:14:29,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:14:29,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:14:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:14:29,184 INFO L87 Difference]: Start difference. First operand 16516 states and 22859 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:29,738 INFO L93 Difference]: Finished difference Result 33133 states and 45855 transitions. [2021-11-06 14:14:29,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:14:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-06 14:14:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:29,775 INFO L225 Difference]: With dead ends: 33133 [2021-11-06 14:14:29,775 INFO L226 Difference]: Without dead ends: 16630 [2021-11-06 14:14:29,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:14:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16630 states. [2021-11-06 14:14:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16630 to 16592. [2021-11-06 14:14:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16592 states, 16095 states have (on average 1.37775706741224) internal successors, (22175), 16159 states have internal predecessors, (22175), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-06 14:14:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16592 states to 16592 states and 22935 transitions. [2021-11-06 14:14:30,255 INFO L78 Accepts]: Start accepts. Automaton has 16592 states and 22935 transitions. Word has length 89 [2021-11-06 14:14:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:30,255 INFO L470 AbstractCegarLoop]: Abstraction has 16592 states and 22935 transitions. [2021-11-06 14:14:30,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 16592 states and 22935 transitions. [2021-11-06 14:14:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-06 14:14:30,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:30,264 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-11-06 14:14:30,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 14:14:30,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:30,488 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 14:14:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2133682909, now seen corresponding path program 3 times [2021-11-06 14:14:30,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:30,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713330145] [2021-11-06 14:14:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:30,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:30,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:30,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713330145] [2021-11-06 14:14:30,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713330145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:30,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992983043] [2021-11-06 14:14:30,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:14:30,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:30,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:30,614 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 14:14:30,649 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 14:14:32,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:14:32,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:14:32,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 14:14:32,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-06 14:14:33,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992983043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:33,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:14:33,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-06 14:14:33,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466929569] [2021-11-06 14:14:33,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:14:33,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:33,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:14:33,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:14:33,201 INFO L87 Difference]: Start difference. First operand 16592 states and 22935 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:34,839 INFO L93 Difference]: Finished difference Result 58690 states and 79579 transitions. [2021-11-06 14:14:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:14:34,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-06 14:14:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:34,932 INFO L225 Difference]: With dead ends: 58690 [2021-11-06 14:14:34,932 INFO L226 Difference]: Without dead ends: 42111 [2021-11-06 14:14:34,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:14:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42111 states. [2021-11-06 14:14:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42111 to 16872. [2021-11-06 14:14:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16872 states, 16375 states have (on average 1.3755725190839694) internal successors, (22525), 16439 states have internal predecessors, (22525), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-06 14:14:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16872 states to 16872 states and 23285 transitions. [2021-11-06 14:14:35,851 INFO L78 Accepts]: Start accepts. Automaton has 16872 states and 23285 transitions. Word has length 91 [2021-11-06 14:14:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:35,852 INFO L470 AbstractCegarLoop]: Abstraction has 16872 states and 23285 transitions. [2021-11-06 14:14:35,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 16872 states and 23285 transitions. [2021-11-06 14:14:35,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-06 14:14:35,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:35,860 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-11-06 14:14:35,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-06 14:14:36,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:36,063 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 14:14:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:36,064 INFO L85 PathProgramCache]: Analyzing trace with hash 610829863, now seen corresponding path program 1 times [2021-11-06 14:14:36,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:36,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797872276] [2021-11-06 14:14:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:36,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:36,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:36,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797872276] [2021-11-06 14:14:36,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797872276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:36,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834587454] [2021-11-06 14:14:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:36,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:36,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:36,209 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 14:14:36,210 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 14:14:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:36,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 14:14:36,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:37,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834587454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:37,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:37,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-06 14:14:37,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322951454] [2021-11-06 14:14:37,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:14:37,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:14:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:14:37,066 INFO L87 Difference]: Start difference. First operand 16872 states and 23285 transitions. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 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 14:14:37,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:37,570 INFO L93 Difference]: Finished difference Result 33845 states and 46707 transitions. [2021-11-06 14:14:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 14:14:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 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 93 [2021-11-06 14:14:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:37,608 INFO L225 Difference]: With dead ends: 33845 [2021-11-06 14:14:37,608 INFO L226 Difference]: Without dead ends: 16986 [2021-11-06 14:14:37,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:14:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16986 states. [2021-11-06 14:14:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16986 to 16948. [2021-11-06 14:14:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16948 states, 16451 states have (on average 1.373837456689563) internal successors, (22601), 16515 states have internal predecessors, (22601), 304 states have call successors, (304), 192 states have call predecessors, (304), 192 states have return successors, (456), 272 states have call predecessors, (456), 304 states have call successors, (456) [2021-11-06 14:14:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16948 states to 16948 states and 23361 transitions. [2021-11-06 14:14:38,308 INFO L78 Accepts]: Start accepts. Automaton has 16948 states and 23361 transitions. Word has length 93 [2021-11-06 14:14:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:38,309 INFO L470 AbstractCegarLoop]: Abstraction has 16948 states and 23361 transitions. [2021-11-06 14:14:38,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 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 14:14:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 16948 states and 23361 transitions. [2021-11-06 14:14:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-06 14:14:38,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:38,318 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 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] [2021-11-06 14:14:38,339 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 14:14:38,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:38,539 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 14:14:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash -531555131, now seen corresponding path program 1 times [2021-11-06 14:14:38,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:38,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121190997] [2021-11-06 14:14:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:38,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:14:38,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:38,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121190997] [2021-11-06 14:14:38,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121190997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:38,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:38,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:38,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741836517] [2021-11-06 14:14:38,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:38,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:38,661 INFO L87 Difference]: Start difference. First operand 16948 states and 23361 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 14:14:40,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:40,209 INFO L93 Difference]: Finished difference Result 25819 states and 35576 transitions. [2021-11-06 14:14:40,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:40,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 94 [2021-11-06 14:14:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:40,230 INFO L225 Difference]: With dead ends: 25819 [2021-11-06 14:14:40,231 INFO L226 Difference]: Without dead ends: 9133 [2021-11-06 14:14:40,255 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 14:14:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2021-11-06 14:14:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 9104. [2021-11-06 14:14:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9104 states, 8855 states have (on average 1.359683794466403) internal successors, (12040), 8887 states have internal predecessors, (12040), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-06 14:14:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9104 states to 9104 states and 12420 transitions. [2021-11-06 14:14:40,570 INFO L78 Accepts]: Start accepts. Automaton has 9104 states and 12420 transitions. Word has length 94 [2021-11-06 14:14:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:40,570 INFO L470 AbstractCegarLoop]: Abstraction has 9104 states and 12420 transitions. [2021-11-06 14:14:40,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 14:14:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 9104 states and 12420 transitions. [2021-11-06 14:14:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-06 14:14:40,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:40,576 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 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] [2021-11-06 14:14:40,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-06 14:14:40,576 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 14:14:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:40,577 INFO L85 PathProgramCache]: Analyzing trace with hash 704154339, now seen corresponding path program 2 times [2021-11-06 14:14:40,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:40,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280282480] [2021-11-06 14:14:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:40,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:40,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:40,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280282480] [2021-11-06 14:14:40,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280282480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:40,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715890503] [2021-11-06 14:14:40,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:14:40,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:40,709 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 14:14:40,717 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 14:14:42,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:14:42,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:14:42,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-06 14:14:42,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:42,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715890503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:42,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:42,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-06 14:14:42,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742022989] [2021-11-06 14:14:42,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 14:14:42,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 14:14:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:14:42,701 INFO L87 Difference]: Start difference. First operand 9104 states and 12420 transitions. Second operand has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:43,004 INFO L93 Difference]: Finished difference Result 18267 states and 24921 transitions. [2021-11-06 14:14:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:14:43,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-06 14:14:43,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:43,022 INFO L225 Difference]: With dead ends: 18267 [2021-11-06 14:14:43,022 INFO L226 Difference]: Without dead ends: 9176 [2021-11-06 14:14:43,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:14:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9176 states. [2021-11-06 14:14:43,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9176 to 9152. [2021-11-06 14:14:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9152 states, 8903 states have (on average 1.3577445804784904) internal successors, (12088), 8935 states have internal predecessors, (12088), 152 states have call successors, (152), 96 states have call predecessors, (152), 96 states have return successors, (228), 136 states have call predecessors, (228), 152 states have call successors, (228) [2021-11-06 14:14:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9152 states to 9152 states and 12468 transitions. [2021-11-06 14:14:43,413 INFO L78 Accepts]: Start accepts. Automaton has 9152 states and 12468 transitions. Word has length 95 [2021-11-06 14:14:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:43,413 INFO L470 AbstractCegarLoop]: Abstraction has 9152 states and 12468 transitions. [2021-11-06 14:14:43,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 9152 states and 12468 transitions. [2021-11-06 14:14:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 14:14:43,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:43,420 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:43,457 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 14:14:43,642 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,SelfDestructingSolverStorable21 [2021-11-06 14:14:43,643 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 14:14:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1459921486, now seen corresponding path program 1 times [2021-11-06 14:14:43,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:43,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771401946] [2021-11-06 14:14:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:43,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:43,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:43,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771401946] [2021-11-06 14:14:43,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771401946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:43,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126554859] [2021-11-06 14:14:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:43,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:43,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:43,757 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 14:14:43,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-06 14:14:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:44,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:14:44,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-06 14:14:44,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126554859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:44,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:14:44,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 14:14:44,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146306628] [2021-11-06 14:14:44,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:44,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:44,560 INFO L87 Difference]: Start difference. First operand 9152 states and 12468 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 14:14:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:44,908 INFO L93 Difference]: Finished difference Result 16713 states and 23044 transitions. [2021-11-06 14:14:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 97 [2021-11-06 14:14:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:44,935 INFO L225 Difference]: With dead ends: 16713 [2021-11-06 14:14:44,936 INFO L226 Difference]: Without dead ends: 12357 [2021-11-06 14:14:44,946 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12357 states. [2021-11-06 14:14:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12357 to 12348. [2021-11-06 14:14:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12348 states, 11975 states have (on average 1.3769519832985386) internal successors, (16489), 12023 states have internal predecessors, (16489), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:14:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12348 states to 12348 states and 17059 transitions. [2021-11-06 14:14:45,335 INFO L78 Accepts]: Start accepts. Automaton has 12348 states and 17059 transitions. Word has length 97 [2021-11-06 14:14:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:45,335 INFO L470 AbstractCegarLoop]: Abstraction has 12348 states and 17059 transitions. [2021-11-06 14:14:45,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 14:14:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 12348 states and 17059 transitions. [2021-11-06 14:14:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 14:14:45,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:45,342 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 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] [2021-11-06 14:14:45,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-06 14:14:45,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-06 14:14:45,563 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 14:14:45,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:45,563 INFO L85 PathProgramCache]: Analyzing trace with hash 194662559, now seen corresponding path program 3 times [2021-11-06 14:14:45,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:45,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846629377] [2021-11-06 14:14:45,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:45,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:14:45,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:45,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846629377] [2021-11-06 14:14:45,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846629377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:45,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261547845] [2021-11-06 14:14:45,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:14:45,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:45,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:45,716 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:14:45,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-06 14:14:48,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:14:48,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:14:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-06 14:14:48,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-06 14:14:48,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261547845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:48,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:14:48,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-11-06 14:14:48,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132689311] [2021-11-06 14:14:48,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:14:48,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:14:48,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:14:48,358 INFO L87 Difference]: Start difference. First operand 12348 states and 17059 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 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 14:14:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:52,891 INFO L93 Difference]: Finished difference Result 54307 states and 73492 transitions. [2021-11-06 14:14:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-06 14:14:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 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 97 [2021-11-06 14:14:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:52,971 INFO L225 Difference]: With dead ends: 54307 [2021-11-06 14:14:52,971 INFO L226 Difference]: Without dead ends: 41972 [2021-11-06 14:14:53,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=581, Invalid=2841, Unknown=0, NotChecked=0, Total=3422 [2021-11-06 14:14:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41972 states. [2021-11-06 14:14:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41972 to 12348. [2021-11-06 14:14:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12348 states, 11975 states have (on average 1.3759498956158664) internal successors, (16477), 12023 states have internal predecessors, (16477), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:14:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12348 states to 12348 states and 17047 transitions. [2021-11-06 14:14:53,801 INFO L78 Accepts]: Start accepts. Automaton has 12348 states and 17047 transitions. Word has length 97 [2021-11-06 14:14:53,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:53,801 INFO L470 AbstractCegarLoop]: Abstraction has 12348 states and 17047 transitions. [2021-11-06 14:14:53,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 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 14:14:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 12348 states and 17047 transitions. [2021-11-06 14:14:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-06 14:14:53,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:53,809 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2021-11-06 14:14:53,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-06 14:14:54,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-06 14:14:54,024 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 14:14:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1319547252, now seen corresponding path program 1 times [2021-11-06 14:14:54,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:54,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121597719] [2021-11-06 14:14:54,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:54,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:14:54,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:54,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121597719] [2021-11-06 14:14:54,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121597719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:54,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:54,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:54,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477097984] [2021-11-06 14:14:54,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:54,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:54,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:54,089 INFO L87 Difference]: Start difference. First operand 12348 states and 17047 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:55,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:55,475 INFO L93 Difference]: Finished difference Result 22714 states and 31602 transitions. [2021-11-06 14:14:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:55,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-06 14:14:55,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:55,499 INFO L225 Difference]: With dead ends: 22714 [2021-11-06 14:14:55,500 INFO L226 Difference]: Without dead ends: 11726 [2021-11-06 14:14:55,516 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 14:14:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11726 states. [2021-11-06 14:14:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11726 to 11721. [2021-11-06 14:14:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11721 states, 11348 states have (on average 1.3766302432146633) internal successors, (15622), 11396 states have internal predecessors, (15622), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:14:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11721 states to 11721 states and 16192 transitions. [2021-11-06 14:14:56,014 INFO L78 Accepts]: Start accepts. Automaton has 11721 states and 16192 transitions. Word has length 99 [2021-11-06 14:14:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:56,014 INFO L470 AbstractCegarLoop]: Abstraction has 11721 states and 16192 transitions. [2021-11-06 14:14:56,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11721 states and 16192 transitions. [2021-11-06 14:14:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-06 14:14:56,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:56,020 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2021-11-06 14:14:56,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-06 14:14:56,021 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 14:14:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:56,021 INFO L85 PathProgramCache]: Analyzing trace with hash -485891082, now seen corresponding path program 1 times [2021-11-06 14:14:56,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:56,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899558416] [2021-11-06 14:14:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:56,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 14:14:56,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:56,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899558416] [2021-11-06 14:14:56,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899558416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:56,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:56,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:14:56,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734245866] [2021-11-06 14:14:56,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:14:56,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:56,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:14:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:14:56,102 INFO L87 Difference]: Start difference. First operand 11721 states and 16192 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 14:14:57,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:57,018 INFO L93 Difference]: Finished difference Result 30312 states and 41932 transitions. [2021-11-06 14:14:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:14:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 99 [2021-11-06 14:14:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:57,064 INFO L225 Difference]: With dead ends: 30312 [2021-11-06 14:14:57,064 INFO L226 Difference]: Without dead ends: 20355 [2021-11-06 14:14:57,084 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 14:14:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-11-06 14:14:57,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 11745. [2021-11-06 14:14:57,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11745 states, 11372 states have (on average 1.3758353851565248) internal successors, (15646), 11420 states have internal predecessors, (15646), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:14:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11745 states to 11745 states and 16216 transitions. [2021-11-06 14:14:57,679 INFO L78 Accepts]: Start accepts. Automaton has 11745 states and 16216 transitions. Word has length 99 [2021-11-06 14:14:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:57,679 INFO L470 AbstractCegarLoop]: Abstraction has 11745 states and 16216 transitions. [2021-11-06 14:14:57,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 14:14:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 11745 states and 16216 transitions. [2021-11-06 14:14:57,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-06 14:14:57,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:57,685 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2021-11-06 14:14:57,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-06 14:14:57,685 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 14:14:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:57,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1141828049, now seen corresponding path program 1 times [2021-11-06 14:14:57,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:57,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979122996] [2021-11-06 14:14:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:57,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 14:14:57,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:57,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979122996] [2021-11-06 14:14:57,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979122996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:57,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:57,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:57,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100883366] [2021-11-06 14:14:57,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:57,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:57,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:57,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:57,799 INFO L87 Difference]: Start difference. First operand 11745 states and 16216 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 14:14:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:58,389 INFO L93 Difference]: Finished difference Result 23569 states and 32601 transitions. [2021-11-06 14:14:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 100 [2021-11-06 14:14:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:58,414 INFO L225 Difference]: With dead ends: 23569 [2021-11-06 14:14:58,414 INFO L226 Difference]: Without dead ends: 11837 [2021-11-06 14:14:58,430 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 14:14:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-11-06 14:14:58,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11837. [2021-11-06 14:14:58,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11837 states, 11464 states have (on average 1.3728192602930913) internal successors, (15738), 11512 states have internal predecessors, (15738), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:14:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11837 states to 11837 states and 16308 transitions. [2021-11-06 14:14:58,960 INFO L78 Accepts]: Start accepts. Automaton has 11837 states and 16308 transitions. Word has length 100 [2021-11-06 14:14:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:58,961 INFO L470 AbstractCegarLoop]: Abstraction has 11837 states and 16308 transitions. [2021-11-06 14:14:58,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 14:14:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 11837 states and 16308 transitions. [2021-11-06 14:14:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-06 14:14:58,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:58,967 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2021-11-06 14:14:58,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-06 14:14:58,968 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 14:14:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:58,968 INFO L85 PathProgramCache]: Analyzing trace with hash 818254937, now seen corresponding path program 1 times [2021-11-06 14:14:58,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:58,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329755508] [2021-11-06 14:14:58,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:58,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 14:14:59,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:59,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329755508] [2021-11-06 14:14:59,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329755508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:59,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457443693] [2021-11-06 14:14:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:59,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:59,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:59,137 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:14:59,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-06 14:15:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:00,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1432 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:15:00,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:00,150 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 13 treesize of output 7 [2021-11-06 14:15:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 14:15:00,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457443693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:00,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:15:00,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 14:15:00,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255512545] [2021-11-06 14:15:00,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:00,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:00,268 INFO L87 Difference]: Start difference. First operand 11837 states and 16308 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:01,114 INFO L93 Difference]: Finished difference Result 23753 states and 32785 transitions. [2021-11-06 14:15:01,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:01,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-06 14:15:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:01,136 INFO L225 Difference]: With dead ends: 23753 [2021-11-06 14:15:01,136 INFO L226 Difference]: Without dead ends: 11929 [2021-11-06 14:15:01,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11929 states. [2021-11-06 14:15:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11929 to 11929. [2021-11-06 14:15:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11929 states, 11556 states have (on average 1.3698511595707858) internal successors, (15830), 11604 states have internal predecessors, (15830), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:15:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11929 states to 11929 states and 16400 transitions. [2021-11-06 14:15:01,753 INFO L78 Accepts]: Start accepts. Automaton has 11929 states and 16400 transitions. Word has length 101 [2021-11-06 14:15:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:01,754 INFO L470 AbstractCegarLoop]: Abstraction has 11929 states and 16400 transitions. [2021-11-06 14:15:01,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 11929 states and 16400 transitions. [2021-11-06 14:15:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-06 14:15:01,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:01,759 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2021-11-06 14:15:01,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:01,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-06 14:15:01,981 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 14:15:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1224487733, now seen corresponding path program 1 times [2021-11-06 14:15:01,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:01,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827002854] [2021-11-06 14:15:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:01,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 14:15:02,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:02,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827002854] [2021-11-06 14:15:02,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827002854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:02,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611611237] [2021-11-06 14:15:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:02,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:02,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:02,228 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:02,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-06 14:15:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:15:02,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 14:15:03,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611611237] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:03,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:03,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-06 14:15:03,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801300194] [2021-11-06 14:15:03,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:15:03,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:03,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:15:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:15:03,141 INFO L87 Difference]: Start difference. First operand 11929 states and 16400 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 14:15:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:04,350 INFO L93 Difference]: Finished difference Result 26749 states and 36540 transitions. [2021-11-06 14:15:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:15:04,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 102 [2021-11-06 14:15:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:04,382 INFO L225 Difference]: With dead ends: 26749 [2021-11-06 14:15:04,383 INFO L226 Difference]: Without dead ends: 14833 [2021-11-06 14:15:04,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:15:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14833 states. [2021-11-06 14:15:05,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14833 to 12021. [2021-11-06 14:15:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12021 states, 11648 states have (on average 1.366929945054945) internal successors, (15922), 11696 states have internal predecessors, (15922), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:15:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12021 states to 12021 states and 16492 transitions. [2021-11-06 14:15:05,140 INFO L78 Accepts]: Start accepts. Automaton has 12021 states and 16492 transitions. Word has length 102 [2021-11-06 14:15:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:05,140 INFO L470 AbstractCegarLoop]: Abstraction has 12021 states and 16492 transitions. [2021-11-06 14:15:05,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 14:15:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 12021 states and 16492 transitions. [2021-11-06 14:15:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 14:15:05,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:05,146 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2021-11-06 14:15:05,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-06 14:15:05,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:05,361 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 14:15:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:05,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2019898025, now seen corresponding path program 1 times [2021-11-06 14:15:05,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:05,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362799007] [2021-11-06 14:15:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:05,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 14:15:05,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:05,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362799007] [2021-11-06 14:15:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362799007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:05,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208135651] [2021-11-06 14:15:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:05,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:05,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:05,488 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:05,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-06 14:15:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 14:15:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:06,823 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 13 treesize of output 7 [2021-11-06 14:15:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 14:15:06,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208135651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:06,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:06,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-06 14:15:06,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707316531] [2021-11-06 14:15:06,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:15:06,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:15:06,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:15:06,969 INFO L87 Difference]: Start difference. First operand 12021 states and 16492 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 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 14:15:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:08,634 INFO L93 Difference]: Finished difference Result 24213 states and 33337 transitions. [2021-11-06 14:15:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:15:08,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 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 14:15:08,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:08,657 INFO L225 Difference]: With dead ends: 24213 [2021-11-06 14:15:08,657 INFO L226 Difference]: Without dead ends: 12205 [2021-11-06 14:15:08,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:15:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12205 states. [2021-11-06 14:15:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12205 to 12205. [2021-11-06 14:15:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12205 states, 11832 states have (on average 1.3612237998647736) internal successors, (16106), 11880 states have internal predecessors, (16106), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:15:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12205 states to 12205 states and 16676 transitions. [2021-11-06 14:15:09,452 INFO L78 Accepts]: Start accepts. Automaton has 12205 states and 16676 transitions. Word has length 103 [2021-11-06 14:15:09,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:09,452 INFO L470 AbstractCegarLoop]: Abstraction has 12205 states and 16676 transitions. [2021-11-06 14:15:09,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 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 14:15:09,453 INFO L276 IsEmpty]: Start isEmpty. Operand 12205 states and 16676 transitions. [2021-11-06 14:15:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-06 14:15:09,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:09,459 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:09,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-06 14:15:09,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:09,675 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 14:15:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:09,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1768725035, now seen corresponding path program 2 times [2021-11-06 14:15:09,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:09,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875082162] [2021-11-06 14:15:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:09,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-06 14:15:09,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:09,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875082162] [2021-11-06 14:15:09,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875082162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:09,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130526131] [2021-11-06 14:15:09,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:15:09,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:09,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:09,813 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:09,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-06 14:15:12,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:15:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:12,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1520 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 14:15:12,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 14:15:12,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130526131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:12,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:12,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-11-06 14:15:12,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393246706] [2021-11-06 14:15:12,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:15:12,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:12,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:15:12,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:15:12,538 INFO L87 Difference]: Start difference. First operand 12205 states and 16676 transitions. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 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 14:15:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:14,456 INFO L93 Difference]: Finished difference Result 24489 states and 33521 transitions. [2021-11-06 14:15:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:15:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 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 14:15:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:14,480 INFO L225 Difference]: With dead ends: 24489 [2021-11-06 14:15:14,480 INFO L226 Difference]: Without dead ends: 12297 [2021-11-06 14:15:14,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:15:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12297 states. [2021-11-06 14:15:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12297 to 12297. [2021-11-06 14:15:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12297 states, 11924 states have (on average 1.3584367661858436) internal successors, (16198), 11972 states have internal predecessors, (16198), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:15:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12297 states to 12297 states and 16768 transitions. [2021-11-06 14:15:15,104 INFO L78 Accepts]: Start accepts. Automaton has 12297 states and 16768 transitions. Word has length 105 [2021-11-06 14:15:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:15,104 INFO L470 AbstractCegarLoop]: Abstraction has 12297 states and 16768 transitions. [2021-11-06 14:15:15,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 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 14:15:15,105 INFO L276 IsEmpty]: Start isEmpty. Operand 12297 states and 16768 transitions. [2021-11-06 14:15:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-06 14:15:15,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:15,112 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 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] [2021-11-06 14:15:15,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-06 14:15:15,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:15,327 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 14:15:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1435682445, now seen corresponding path program 3 times [2021-11-06 14:15:15,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:15,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87301833] [2021-11-06 14:15:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:15,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-06 14:15:15,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:15,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87301833] [2021-11-06 14:15:15,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87301833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:15,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424295293] [2021-11-06 14:15:15,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:15:15,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:15,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:15,468 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:15,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-06 14:15:18,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:15:18,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:18,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-06 14:15:18,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:15:19,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424295293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:19,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:15:19,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2021-11-06 14:15:19,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123131244] [2021-11-06 14:15:19,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:15:19,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:15:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:15:19,011 INFO L87 Difference]: Start difference. First operand 12297 states and 16768 transitions. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 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 14:15:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:33,328 INFO L93 Difference]: Finished difference Result 108859 states and 142302 transitions. [2021-11-06 14:15:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-06 14:15:33,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 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 106 [2021-11-06 14:15:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:33,500 INFO L225 Difference]: With dead ends: 108859 [2021-11-06 14:15:33,501 INFO L226 Difference]: Without dead ends: 96575 [2021-11-06 14:15:33,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1632, Invalid=8468, Unknown=0, NotChecked=0, Total=10100 [2021-11-06 14:15:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96575 states. [2021-11-06 14:15:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96575 to 12275. [2021-11-06 14:15:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 11902 states have (on average 1.354898336414048) internal successors, (16126), 11950 states have internal predecessors, (16126), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:15:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 16696 transitions. [2021-11-06 14:15:35,132 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 16696 transitions. Word has length 106 [2021-11-06 14:15:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:35,133 INFO L470 AbstractCegarLoop]: Abstraction has 12275 states and 16696 transitions. [2021-11-06 14:15:35,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 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 14:15:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 16696 transitions. [2021-11-06 14:15:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-06 14:15:35,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:35,139 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 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] [2021-11-06 14:15:35,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:35,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:35,355 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 14:15:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:35,356 INFO L85 PathProgramCache]: Analyzing trace with hash -746468658, now seen corresponding path program 1 times [2021-11-06 14:15:35,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:35,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757389132] [2021-11-06 14:15:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:35,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:35,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:35,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757389132] [2021-11-06 14:15:35,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757389132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:35,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021683902] [2021-11-06 14:15:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:35,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:35,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:35,555 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:35,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-06 14:15:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:36,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:15:36,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:15:36,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021683902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:36,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:36,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-06 14:15:36,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996716566] [2021-11-06 14:15:36,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 14:15:36,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:36,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 14:15:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:15:36,664 INFO L87 Difference]: Start difference. First operand 12275 states and 16696 transitions. Second operand has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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 14:15:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:37,654 INFO L93 Difference]: Finished difference Result 24577 states and 33437 transitions. [2021-11-06 14:15:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 14:15:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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 106 [2021-11-06 14:15:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:37,678 INFO L225 Difference]: With dead ends: 24577 [2021-11-06 14:15:37,678 INFO L226 Difference]: Without dead ends: 12315 [2021-11-06 14:15:37,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:15:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12315 states. [2021-11-06 14:15:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12315 to 12315. [2021-11-06 14:15:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12315 states, 11942 states have (on average 1.3537095963825154) internal successors, (16166), 11990 states have internal predecessors, (16166), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:15:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12315 states to 12315 states and 16736 transitions. [2021-11-06 14:15:38,869 INFO L78 Accepts]: Start accepts. Automaton has 12315 states and 16736 transitions. Word has length 106 [2021-11-06 14:15:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 12315 states and 16736 transitions. [2021-11-06 14:15:38,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 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 14:15:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 12315 states and 16736 transitions. [2021-11-06 14:15:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-06 14:15:38,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:38,899 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-11-06 14:15:38,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:39,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:39,120 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 14:15:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:39,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1376233582, now seen corresponding path program 2 times [2021-11-06 14:15:39,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:39,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322758803] [2021-11-06 14:15:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:39,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-06 14:15:39,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:39,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322758803] [2021-11-06 14:15:39,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322758803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:39,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:39,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:15:39,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195064523] [2021-11-06 14:15:39,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:15:39,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:39,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:15:39,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:15:39,387 INFO L87 Difference]: Start difference. First operand 12315 states and 16736 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 14:15:40,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:40,988 INFO L93 Difference]: Finished difference Result 30097 states and 40644 transitions. [2021-11-06 14:15:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:15:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 108 [2021-11-06 14:15:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:41,021 INFO L225 Difference]: With dead ends: 30097 [2021-11-06 14:15:41,021 INFO L226 Difference]: Without dead ends: 17755 [2021-11-06 14:15:41,043 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 14:15:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17755 states. [2021-11-06 14:15:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17755 to 12315. [2021-11-06 14:15:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12315 states, 11942 states have (on average 1.3520348350360074) internal successors, (16146), 11990 states have internal predecessors, (16146), 228 states have call successors, (228), 144 states have call predecessors, (228), 144 states have return successors, (342), 204 states have call predecessors, (342), 228 states have call successors, (342) [2021-11-06 14:15:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12315 states to 12315 states and 16716 transitions. [2021-11-06 14:15:42,287 INFO L78 Accepts]: Start accepts. Automaton has 12315 states and 16716 transitions. Word has length 108 [2021-11-06 14:15:42,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:42,287 INFO L470 AbstractCegarLoop]: Abstraction has 12315 states and 16716 transitions. [2021-11-06 14:15:42,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 14:15:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 12315 states and 16716 transitions. [2021-11-06 14:15:42,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-06 14:15:42,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:42,293 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-11-06 14:15:42,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-06 14:15:42,294 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 14:15:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:42,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1690380302, now seen corresponding path program 1 times [2021-11-06 14:15:42,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:42,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705082609] [2021-11-06 14:15:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:42,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-06 14:15:42,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:42,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705082609] [2021-11-06 14:15:42,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705082609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:42,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:15:42,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-06 14:15:42,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510138408] [2021-11-06 14:15:42,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:15:42,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:42,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:15:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:15:42,688 INFO L87 Difference]: Start difference. First operand 12315 states and 16716 transitions. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:19,472 INFO L93 Difference]: Finished difference Result 77915 states and 103774 transitions. [2021-11-06 14:16:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-06 14:16:19,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-06 14:16:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:19,780 INFO L225 Difference]: With dead ends: 77915 [2021-11-06 14:16:19,780 INFO L226 Difference]: Without dead ends: 65595 [2021-11-06 14:16:19,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3512 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1782, Invalid=7338, Unknown=0, NotChecked=0, Total=9120 [2021-11-06 14:16:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65595 states. [2021-11-06 14:16:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65595 to 18478. [2021-11-06 14:16:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18478 states, 17919 states have (on average 1.3497963055974105) internal successors, (24187), 17991 states have internal predecessors, (24187), 342 states have call successors, (342), 216 states have call predecessors, (342), 216 states have return successors, (456), 306 states have call predecessors, (456), 342 states have call successors, (456) [2021-11-06 14:16:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18478 states to 18478 states and 24985 transitions. [2021-11-06 14:16:22,028 INFO L78 Accepts]: Start accepts. Automaton has 18478 states and 24985 transitions. Word has length 110 [2021-11-06 14:16:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:22,028 INFO L470 AbstractCegarLoop]: Abstraction has 18478 states and 24985 transitions. [2021-11-06 14:16:22,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18478 states and 24985 transitions. [2021-11-06 14:16:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-06 14:16:22,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:22,035 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 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] [2021-11-06 14:16:22,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-06 14:16:22,036 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 14:16:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -132372377, now seen corresponding path program 1 times [2021-11-06 14:16:22,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:22,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746972085] [2021-11-06 14:16:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:22,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-06 14:16:22,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:22,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746972085] [2021-11-06 14:16:22,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746972085] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:22,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868940579] [2021-11-06 14:16:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:22,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:22,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:22,173 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:16:22,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-06 14:16:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1595 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 14:16:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:16:23,619 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 13 treesize of output 7 [2021-11-06 14:16:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-06 14:16:23,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868940579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:23,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:16:23,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-11-06 14:16:23,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782853120] [2021-11-06 14:16:23,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:16:23,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:16:23,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:16:23,759 INFO L87 Difference]: Start difference. First operand 18478 states and 24985 transitions. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 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 14:16:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:28,418 INFO L93 Difference]: Finished difference Result 37219 states and 50507 transitions. [2021-11-06 14:16:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:16:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 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 112 [2021-11-06 14:16:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:28,459 INFO L225 Difference]: With dead ends: 37219 [2021-11-06 14:16:28,460 INFO L226 Difference]: Without dead ends: 18754 [2021-11-06 14:16:28,487 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:16:28,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18754 states. [2021-11-06 14:16:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18754 to 18754. [2021-11-06 14:16:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18754 states, 18195 states have (on average 1.3444902445726847) internal successors, (24463), 18267 states have internal predecessors, (24463), 342 states have call successors, (342), 216 states have call predecessors, (342), 216 states have return successors, (456), 306 states have call predecessors, (456), 342 states have call successors, (456) [2021-11-06 14:16:30,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18754 states to 18754 states and 25261 transitions. [2021-11-06 14:16:30,608 INFO L78 Accepts]: Start accepts. Automaton has 18754 states and 25261 transitions. Word has length 112 [2021-11-06 14:16:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:30,609 INFO L470 AbstractCegarLoop]: Abstraction has 18754 states and 25261 transitions. [2021-11-06 14:16:30,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 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 14:16:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 18754 states and 25261 transitions. [2021-11-06 14:16:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-06 14:16:30,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:30,616 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 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] [2021-11-06 14:16:30,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-06 14:16:30,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:30,839 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 14:16:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1863590939, now seen corresponding path program 2 times [2021-11-06 14:16:30,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:30,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081623753] [2021-11-06 14:16:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:30,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 14:16:31,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:31,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081623753] [2021-11-06 14:16:31,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081623753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:31,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379893399] [2021-11-06 14:16:31,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:16:31,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:31,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:31,112 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:16:31,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-06 14:16:33,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:16:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:16:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-06 14:16:33,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:16:33,224 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 13 treesize of output 7 [2021-11-06 14:16:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 14:16:33,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379893399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:33,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:16:33,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-06 14:16:33,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302038167] [2021-11-06 14:16:33,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:16:33,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:16:33,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:16:33,404 INFO L87 Difference]: Start difference. First operand 18754 states and 25261 transitions. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 14:16:38,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:38,212 INFO L93 Difference]: Finished difference Result 37633 states and 50783 transitions. [2021-11-06 14:16:38,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:16:38,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 114 [2021-11-06 14:16:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:38,249 INFO L225 Difference]: With dead ends: 37633 [2021-11-06 14:16:38,250 INFO L226 Difference]: Without dead ends: 18892 [2021-11-06 14:16:38,275 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:16:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2021-11-06 14:16:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18892. [2021-11-06 14:16:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18892 states, 18333 states have (on average 1.34189712540228) internal successors, (24601), 18405 states have internal predecessors, (24601), 342 states have call successors, (342), 216 states have call predecessors, (342), 216 states have return successors, (456), 306 states have call predecessors, (456), 342 states have call successors, (456) [2021-11-06 14:16:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18892 states to 18892 states and 25399 transitions. [2021-11-06 14:16:40,447 INFO L78 Accepts]: Start accepts. Automaton has 18892 states and 25399 transitions. Word has length 114 [2021-11-06 14:16:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:40,447 INFO L470 AbstractCegarLoop]: Abstraction has 18892 states and 25399 transitions. [2021-11-06 14:16:40,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 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 14:16:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 18892 states and 25399 transitions. [2021-11-06 14:16:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-06 14:16:40,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:40,455 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 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] [2021-11-06 14:16:40,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-06 14:16:40,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-06 14:16:40,679 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash -41991543, now seen corresponding path program 3 times [2021-11-06 14:16:40,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:40,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318970222] [2021-11-06 14:16:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:40,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 14:16:40,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:40,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318970222] [2021-11-06 14:16:40,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318970222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:40,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667864148] [2021-11-06 14:16:40,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:16:40,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:40,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:40,908 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:16:40,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-06 14:16:44,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:16:44,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:16:44,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-06 14:16:44,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:16:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-06 14:16:45,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667864148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:45,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:16:45,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2021-11-06 14:16:45,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270242149] [2021-11-06 14:16:45,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:16:45,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:16:45,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:16:45,461 INFO L87 Difference]: Start difference. First operand 18892 states and 25399 transitions. Second operand has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 14:17:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:08,407 INFO L93 Difference]: Finished difference Result 111505 states and 147354 transitions. [2021-11-06 14:17:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-06 14:17:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 14:17:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:08,581 INFO L225 Difference]: With dead ends: 111505 [2021-11-06 14:17:08,581 INFO L226 Difference]: Without dead ends: 95089 [2021-11-06 14:17:08,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1584, Invalid=7158, Unknown=0, NotChecked=0, Total=8742 [2021-11-06 14:17:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95089 states. [2021-11-06 14:17:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95089 to 23996. [2021-11-06 14:17:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23996 states, 23263 states have (on average 1.345871125822121) internal successors, (31309), 23353 states have internal predecessors, (31309), 444 states have call successors, (444), 288 states have call predecessors, (444), 288 states have return successors, (558), 402 states have call predecessors, (558), 444 states have call successors, (558) [2021-11-06 14:17:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23996 states to 23996 states and 32311 transitions. [2021-11-06 14:17:12,346 INFO L78 Accepts]: Start accepts. Automaton has 23996 states and 32311 transitions. Word has length 115 [2021-11-06 14:17:12,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:17:12,347 INFO L470 AbstractCegarLoop]: Abstraction has 23996 states and 32311 transitions. [2021-11-06 14:17:12,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.0) internal successors, (99), 11 states have internal predecessors, (99), 0 states have call successors, (0), 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 14:17:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 23996 states and 32311 transitions. [2021-11-06 14:17:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-06 14:17:12,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:17:12,361 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 3, 3, 3, 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] [2021-11-06 14:17:12,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-06 14:17:12,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-06 14:17:12,583 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:17:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:17:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1924743582, now seen corresponding path program 1 times [2021-11-06 14:17:12,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:17:12,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141471553] [2021-11-06 14:17:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:12,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:17:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-06 14:17:12,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:17:12,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141471553] [2021-11-06 14:17:12,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141471553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:17:12,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649072576] [2021-11-06 14:17:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:12,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:17:12,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:17:12,722 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:17:12,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-06 14:17:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:13,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:17:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:17:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-06 14:17:14,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649072576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:17:14,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:17:14,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-06 14:17:14,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516473371] [2021-11-06 14:17:14,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:17:14,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:17:14,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:17:14,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:17:14,064 INFO L87 Difference]: Start difference. First operand 23996 states and 32311 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 14:17:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:18,071 INFO L93 Difference]: Finished difference Result 35008 states and 47263 transitions. [2021-11-06 14:17:18,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:17:18,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 127 [2021-11-06 14:17:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:18,121 INFO L225 Difference]: With dead ends: 35008 [2021-11-06 14:17:18,121 INFO L226 Difference]: Without dead ends: 23873 [2021-11-06 14:17:18,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:17:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23873 states. [2021-11-06 14:17:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23873 to 23868. [2021-11-06 14:17:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23868 states, 23135 states have (on average 1.346315106980765) internal successors, (31147), 23225 states have internal predecessors, (31147), 444 states have call successors, (444), 288 states have call predecessors, (444), 288 states have return successors, (558), 402 states have call predecessors, (558), 444 states have call successors, (558) [2021-11-06 14:17:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23868 states to 23868 states and 32149 transitions. [2021-11-06 14:17:21,694 INFO L78 Accepts]: Start accepts. Automaton has 23868 states and 32149 transitions. Word has length 127 [2021-11-06 14:17:21,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:17:21,695 INFO L470 AbstractCegarLoop]: Abstraction has 23868 states and 32149 transitions. [2021-11-06 14:17:21,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 14:17:21,696 INFO L276 IsEmpty]: Start isEmpty. Operand 23868 states and 32149 transitions. [2021-11-06 14:17:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-06 14:17:21,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:17:21,713 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 3, 3, 3, 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] [2021-11-06 14:17:21,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-06 14:17:21,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-06 14:17:21,927 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:17:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:17:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash 863178764, now seen corresponding path program 2 times [2021-11-06 14:17:21,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:17:21,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134987729] [2021-11-06 14:17:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:21,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:17:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-06 14:17:21,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:17:21,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134987729] [2021-11-06 14:17:21,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134987729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:17:21,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:17:21,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:17:21,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125800941] [2021-11-06 14:17:21,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:17:21,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:17:21,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:17:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:17:21,999 INFO L87 Difference]: Start difference. First operand 23868 states and 32149 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 14:17:28,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:28,178 INFO L93 Difference]: Finished difference Result 64055 states and 86104 transitions. [2021-11-06 14:17:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:17:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 127 [2021-11-06 14:17:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:28,263 INFO L225 Difference]: With dead ends: 64055 [2021-11-06 14:17:28,264 INFO L226 Difference]: Without dead ends: 41178 [2021-11-06 14:17:28,304 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 14:17:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41178 states. [2021-11-06 14:17:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41178 to 23938. [2021-11-06 14:17:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23938 states, 23205 states have (on average 1.3452704158586513) internal successors, (31217), 23295 states have internal predecessors, (31217), 444 states have call successors, (444), 288 states have call predecessors, (444), 288 states have return successors, (558), 402 states have call predecessors, (558), 444 states have call successors, (558) [2021-11-06 14:17:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23938 states to 23938 states and 32219 transitions. [2021-11-06 14:17:31,770 INFO L78 Accepts]: Start accepts. Automaton has 23938 states and 32219 transitions. Word has length 127 [2021-11-06 14:17:31,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:17:31,770 INFO L470 AbstractCegarLoop]: Abstraction has 23938 states and 32219 transitions. [2021-11-06 14:17:31,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 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 14:17:31,770 INFO L276 IsEmpty]: Start isEmpty. Operand 23938 states and 32219 transitions. [2021-11-06 14:17:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-06 14:17:31,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:17:31,780 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 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] [2021-11-06 14:17:31,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-06 14:17:31,781 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:17:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:17:31,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1982127302, now seen corresponding path program 1 times [2021-11-06 14:17:31,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:17:31,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70408400] [2021-11-06 14:17:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:31,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:17:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:31,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-06 14:17:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-06 14:17:31,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:17:31,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70408400] [2021-11-06 14:17:31,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70408400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:17:31,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:17:31,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 14:17:31,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558312574] [2021-11-06 14:17:31,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:17:31,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:17:31,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:17:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:17:31,912 INFO L87 Difference]: Start difference. First operand 23938 states and 32219 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:17:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:56,076 INFO L93 Difference]: Finished difference Result 102564 states and 135116 transitions. [2021-11-06 14:17:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 14:17:56,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-11-06 14:17:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:56,234 INFO L225 Difference]: With dead ends: 102564 [2021-11-06 14:17:56,235 INFO L226 Difference]: Without dead ends: 81456 [2021-11-06 14:17:56,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:17:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81456 states. [2021-11-06 14:18:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81456 to 24490. [2021-11-06 14:18:00,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24490 states, 23661 states have (on average 1.3462237437132836) internal successors, (31853), 23799 states have internal predecessors, (31853), 468 states have call successors, (468), 288 states have call predecessors, (468), 360 states have return successors, (714), 462 states have call predecessors, (714), 468 states have call successors, (714) [2021-11-06 14:18:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24490 states to 24490 states and 33035 transitions. [2021-11-06 14:18:00,199 INFO L78 Accepts]: Start accepts. Automaton has 24490 states and 33035 transitions. Word has length 130 [2021-11-06 14:18:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:18:00,199 INFO L470 AbstractCegarLoop]: Abstraction has 24490 states and 33035 transitions. [2021-11-06 14:18:00,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 5 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:18:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 24490 states and 33035 transitions. [2021-11-06 14:18:00,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-06 14:18:00,210 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:18:00,210 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 4, 4, 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] [2021-11-06 14:18:00,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-06 14:18:00,210 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:18:00,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:18:00,211 INFO L85 PathProgramCache]: Analyzing trace with hash 35370332, now seen corresponding path program 1 times [2021-11-06 14:18:00,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:18:00,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080673232] [2021-11-06 14:18:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:00,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:18:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-06 14:18:00,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:18:00,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080673232] [2021-11-06 14:18:00,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080673232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:18:00,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42348796] [2021-11-06 14:18:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:00,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:18:00,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:18:00,286 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:18:00,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-06 14:18:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:01,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:18:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:18:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 59 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-06 14:18:01,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42348796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:18:01,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:18:01,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-11-06 14:18:01,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657182424] [2021-11-06 14:18:01,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:18:01,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:18:01,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:18:01,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:18:01,722 INFO L87 Difference]: Start difference. First operand 24490 states and 33035 transitions. Second operand has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 0 states have call successors, (0), 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 14:18:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:18:16,466 INFO L93 Difference]: Finished difference Result 88108 states and 116251 transitions. [2021-11-06 14:18:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-06 14:18:16,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-06 14:18:16,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:18:16,648 INFO L225 Difference]: With dead ends: 88108 [2021-11-06 14:18:16,648 INFO L226 Difference]: Without dead ends: 66448 [2021-11-06 14:18:16,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:18:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66448 states. [2021-11-06 14:18:21,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66448 to 24564. [2021-11-06 14:18:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24564 states, 23735 states have (on average 1.3463661259742996) internal successors, (31956), 23873 states have internal predecessors, (31956), 468 states have call successors, (468), 288 states have call predecessors, (468), 360 states have return successors, (714), 462 states have call predecessors, (714), 468 states have call successors, (714) [2021-11-06 14:18:21,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24564 states to 24564 states and 33138 transitions. [2021-11-06 14:18:21,817 INFO L78 Accepts]: Start accepts. Automaton has 24564 states and 33138 transitions. Word has length 130 [2021-11-06 14:18:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:18:21,818 INFO L470 AbstractCegarLoop]: Abstraction has 24564 states and 33138 transitions. [2021-11-06 14:18:21,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 0 states have call successors, (0), 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 14:18:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 24564 states and 33138 transitions. [2021-11-06 14:18:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-06 14:18:21,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:18:21,827 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 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] [2021-11-06 14:18:21,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-06 14:18:22,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:18:22,040 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:18:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:18:22,041 INFO L85 PathProgramCache]: Analyzing trace with hash 180161662, now seen corresponding path program 1 times [2021-11-06 14:18:22,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:18:22,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087601849] [2021-11-06 14:18:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:22,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:18:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:22,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-06 14:18:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 14:18:22,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:18:22,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087601849] [2021-11-06 14:18:22,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087601849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:18:22,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821886707] [2021-11-06 14:18:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:22,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:18:22,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:18:22,398 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:18:22,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-06 14:18:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:24,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 14:18:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:18:24,742 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 13 treesize of output 7 [2021-11-06 14:18:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 14:18:24,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821886707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:18:24,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:18:24,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-11-06 14:18:24,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717709722] [2021-11-06 14:18:24,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:18:24,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:18:24,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:18:24,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:18:24,992 INFO L87 Difference]: Start difference. First operand 24564 states and 33138 transitions. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 10 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:18:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:18:39,241 INFO L93 Difference]: Finished difference Result 50985 states and 69245 transitions. [2021-11-06 14:18:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 14:18:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 10 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 132 [2021-11-06 14:18:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:18:39,293 INFO L225 Difference]: With dead ends: 50985 [2021-11-06 14:18:39,293 INFO L226 Difference]: Without dead ends: 26434 [2021-11-06 14:18:39,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:18:39,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26434 states. [2021-11-06 14:18:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26434 to 24742. [2021-11-06 14:18:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24742 states, 23913 states have (on average 1.343787897796178) internal successors, (32134), 24051 states have internal predecessors, (32134), 468 states have call successors, (468), 288 states have call predecessors, (468), 360 states have return successors, (714), 462 states have call predecessors, (714), 468 states have call successors, (714) [2021-11-06 14:18:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24742 states to 24742 states and 33316 transitions. [2021-11-06 14:18:44,060 INFO L78 Accepts]: Start accepts. Automaton has 24742 states and 33316 transitions. Word has length 132 [2021-11-06 14:18:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:18:44,062 INFO L470 AbstractCegarLoop]: Abstraction has 24742 states and 33316 transitions. [2021-11-06 14:18:44,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 10 states have internal predecessors, (128), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:18:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 24742 states and 33316 transitions. [2021-11-06 14:18:44,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-06 14:18:44,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:18:44,068 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 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] [2021-11-06 14:18:44,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-06 14:18:44,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:18:44,284 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:18:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:18:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1017745954, now seen corresponding path program 2 times [2021-11-06 14:18:44,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:18:44,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362086028] [2021-11-06 14:18:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:44,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:18:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:44,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-06 14:18:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:18:44,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:18:44,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362086028] [2021-11-06 14:18:44,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362086028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:18:44,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434894230] [2021-11-06 14:18:44,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:18:44,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:18:44,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:18:44,631 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:18:44,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-06 14:18:48,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:18:48,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:18:48,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1947 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 14:18:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:18:48,183 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 13 treesize of output 7 [2021-11-06 14:18:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 14:18:48,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434894230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:18:48,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:18:48,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2021-11-06 14:18:48,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104077008] [2021-11-06 14:18:48,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-06 14:18:48,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:18:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-06 14:18:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:18:48,419 INFO L87 Difference]: Start difference. First operand 24742 states and 33316 transitions. Second operand has 14 states, 14 states have (on average 9.357142857142858) internal successors, (131), 13 states have internal predecessors, (131), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:19:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:19:06,599 INFO L93 Difference]: Finished difference Result 51341 states and 69601 transitions. [2021-11-06 14:19:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:19:06,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.357142857142858) internal successors, (131), 13 states have internal predecessors, (131), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 133 [2021-11-06 14:19:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:19:06,663 INFO L225 Difference]: With dead ends: 51341 [2021-11-06 14:19:06,663 INFO L226 Difference]: Without dead ends: 26612 [2021-11-06 14:19:06,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:19:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26612 states. [2021-11-06 14:19:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26612 to 24920. [2021-11-06 14:19:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24920 states, 24091 states have (on average 1.3412477688763438) internal successors, (32312), 24229 states have internal predecessors, (32312), 468 states have call successors, (468), 288 states have call predecessors, (468), 360 states have return successors, (714), 462 states have call predecessors, (714), 468 states have call successors, (714) [2021-11-06 14:19:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24920 states to 24920 states and 33494 transitions. [2021-11-06 14:19:11,342 INFO L78 Accepts]: Start accepts. Automaton has 24920 states and 33494 transitions. Word has length 133 [2021-11-06 14:19:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:19:11,342 INFO L470 AbstractCegarLoop]: Abstraction has 24920 states and 33494 transitions. [2021-11-06 14:19:11,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.357142857142858) internal successors, (131), 13 states have internal predecessors, (131), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:19:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 24920 states and 33494 transitions. [2021-11-06 14:19:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-06 14:19:11,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:19:11,350 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 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] [2021-11-06 14:19:11,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-06 14:19:11,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-06 14:19:11,552 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:19:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:19:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1213055230, now seen corresponding path program 3 times [2021-11-06 14:19:11,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:19:11,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418233862] [2021-11-06 14:19:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:19:11,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:19:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:12,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-06 14:19:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:19:12,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:19:12,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418233862] [2021-11-06 14:19:12,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418233862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:19:12,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575004694] [2021-11-06 14:19:12,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:19:12,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:19:12,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:19:12,019 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:19:12,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-06 14:19:19,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-06 14:19:19,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:19:19,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 14:19:19,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:19:19,831 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 13 treesize of output 7 [2021-11-06 14:19:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-06 14:19:20,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575004694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:19:20,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:19:20,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2021-11-06 14:19:20,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827775389] [2021-11-06 14:19:20,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 14:19:20,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:19:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 14:19:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:19:20,048 INFO L87 Difference]: Start difference. First operand 24920 states and 33494 transitions. Second operand has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 14 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:19:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:19:46,945 INFO L93 Difference]: Finished difference Result 67549 states and 90269 transitions. [2021-11-06 14:19:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 14:19:46,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 14 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 134 [2021-11-06 14:19:46,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:19:47,045 INFO L225 Difference]: With dead ends: 67549 [2021-11-06 14:19:47,045 INFO L226 Difference]: Without dead ends: 42642 [2021-11-06 14:19:47,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:19:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42642 states. [2021-11-06 14:19:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42642 to 25098. [2021-11-06 14:19:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25098 states, 24269 states have (on average 1.3387449009023857) internal successors, (32490), 24407 states have internal predecessors, (32490), 468 states have call successors, (468), 288 states have call predecessors, (468), 360 states have return successors, (714), 462 states have call predecessors, (714), 468 states have call successors, (714) [2021-11-06 14:19:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25098 states to 25098 states and 33672 transitions. [2021-11-06 14:19:52,585 INFO L78 Accepts]: Start accepts. Automaton has 25098 states and 33672 transitions. Word has length 134 [2021-11-06 14:19:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:19:52,585 INFO L470 AbstractCegarLoop]: Abstraction has 25098 states and 33672 transitions. [2021-11-06 14:19:52,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.666666666666666) internal successors, (130), 14 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:19:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25098 states and 33672 transitions. [2021-11-06 14:19:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-06 14:19:52,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:19:52,606 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 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] [2021-11-06 14:19:52,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-06 14:19:52,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-06 14:19:52,831 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:19:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:19:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -551710364, now seen corresponding path program 4 times [2021-11-06 14:19:52,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:19:52,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890571859] [2021-11-06 14:19:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:19:52,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:19:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:53,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-06 14:19:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:19:53,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:19:53,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890571859] [2021-11-06 14:19:53,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890571859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:19:53,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288294850] [2021-11-06 14:19:53,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:19:53,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:19:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:19:53,135 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:19:53,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-06 14:19:57,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:19:57,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:19:57,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1993 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-06 14:19:57,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:19:58,051 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 13 treesize of output 7 [2021-11-06 14:19:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-06 14:19:58,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288294850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:19:58,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:19:58,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-11-06 14:19:58,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457802395] [2021-11-06 14:19:58,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-06 14:19:58,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:19:58,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-06 14:19:58,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:19:58,325 INFO L87 Difference]: Start difference. First operand 25098 states and 33672 transitions. Second operand has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 18 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:20:17,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:20:17,195 INFO L93 Difference]: Finished difference Result 52053 states and 70313 transitions. [2021-11-06 14:20:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 14:20:17,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 18 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 135 [2021-11-06 14:20:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:20:17,268 INFO L225 Difference]: With dead ends: 52053 [2021-11-06 14:20:17,268 INFO L226 Difference]: Without dead ends: 26968 [2021-11-06 14:20:17,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:20:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26968 states. [2021-11-06 14:20:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26968 to 25276. [2021-11-06 14:20:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25276 states, 24447 states have (on average 1.3362784799770933) internal successors, (32668), 24585 states have internal predecessors, (32668), 468 states have call successors, (468), 288 states have call predecessors, (468), 360 states have return successors, (714), 462 states have call predecessors, (714), 468 states have call successors, (714) [2021-11-06 14:20:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25276 states to 25276 states and 33850 transitions. [2021-11-06 14:20:22,719 INFO L78 Accepts]: Start accepts. Automaton has 25276 states and 33850 transitions. Word has length 135 [2021-11-06 14:20:22,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:20:22,719 INFO L470 AbstractCegarLoop]: Abstraction has 25276 states and 33850 transitions. [2021-11-06 14:20:22,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.105263157894737) internal successors, (135), 18 states have internal predecessors, (135), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-06 14:20:22,720 INFO L276 IsEmpty]: Start isEmpty. Operand 25276 states and 33850 transitions. [2021-11-06 14:20:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-06 14:20:22,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:20:22,727 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 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] [2021-11-06 14:20:22,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-06 14:20:22,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-06 14:20:22,943 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:20:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:20:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1838057152, now seen corresponding path program 5 times [2021-11-06 14:20:22,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:20:22,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174106837] [2021-11-06 14:20:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:20:22,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:20:23,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:23,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-11-06 14:20:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 29 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:20:23,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:20:23,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174106837] [2021-11-06 14:20:23,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174106837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:20:23,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430661574] [2021-11-06 14:20:23,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 14:20:23,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:20:23,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:20:23,254 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:20:23,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process Killed by 15