./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--usb_8dev.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--usb_8dev.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 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:13:53,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:13:53,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:13:53,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:13:53,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:13:53,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:13:53,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:13:53,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:13:53,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:13:53,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:13:53,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:13:53,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:13:53,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:13:53,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:13:53,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:13:53,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:13:53,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:13:53,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:13:53,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:13:53,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:13:53,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:13:53,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:13:53,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:13:53,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:13:53,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:13:53,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:13:53,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:13:53,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:13:53,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:13:53,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:13:53,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:13:53,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:13:53,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:13:53,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:13:53,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:13:53,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:13:53,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:13:53,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:13:53,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:13:53,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:13:53,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:13:53,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:13:53,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:13:53,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:13:53,791 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:13:53,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:13:53,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:13:53,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:13:53,792 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:13:53,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:13:53,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:13:53,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:13:53,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:13:53,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:13:53,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:13:53,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:13:53,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:13:53,794 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:13:53,794 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:13:53,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:13:53,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:13:53,794 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2021-11-06 14:13:53,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:13:53,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:13:53,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:13:53,970 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:13:53,971 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:13:53,971 INFO L432 ainManager$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--usb_8dev.ko-entry_point.cil.out.i [2021-11-06 14:13:54,014 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2700377/38c014e21ea3485cb94c6025e921a8cb/FLAGb6bbbf8c9 [2021-11-06 14:13:54,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:13:54,606 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--usb_8dev.ko-entry_point.cil.out.i [2021-11-06 14:13:54,632 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2700377/38c014e21ea3485cb94c6025e921a8cb/FLAGb6bbbf8c9 [2021-11-06 14:13:54,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e2700377/38c014e21ea3485cb94c6025e921a8cb [2021-11-06 14:13:54,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:13:54,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:13:54,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:13:54,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:13:54,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:13:54,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:54,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e6376b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:54, skipping insertion in model container [2021-11-06 14:13:54,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:13:54" (1/1) ... [2021-11-06 14:13:55,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:13:55,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:13:55,679 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--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-06 14:13:55,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:13:55,979 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:13:56,087 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--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2021-11-06 14:13:56,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:13:56,229 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:13:56,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56 WrapperNode [2021-11-06 14:13:56,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:13:56,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:13:56,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:13:56,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:13:56,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:13:56,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:13:56,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:13:56,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:13:56,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:13:56,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:13:56,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:13:56,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:13:56,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (1/1) ... [2021-11-06 14:13:56,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:13:56,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:13:56,604 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 14:13:56,611 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 14:13:56,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:13:56,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-06 14:13:56,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-06 14:13:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:13:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:13:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:13:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-06 14:13:56,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-06 14:13:56,637 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2021-11-06 14:13:56,638 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2021-11-06 14:13:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:13:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:13:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:13:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:13:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 14:13:56,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 14:13:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:13:56,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:13:56,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:13:56,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:13:56,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:13:56,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:13:56,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:14:02,064 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:14:02,067 INFO L299 CfgBuilder]: Removed 561 assume(true) statements. [2021-11-06 14:14:02,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:14:02 BoogieIcfgContainer [2021-11-06 14:14:02,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:14:02,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:14:02,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:14:02,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:14:02,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:13:54" (1/3) ... [2021-11-06 14:14:02,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49177ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:14:02, skipping insertion in model container [2021-11-06 14:14:02,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:13:56" (2/3) ... [2021-11-06 14:14:02,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49177ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:14:02, skipping insertion in model container [2021-11-06 14:14:02,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:14:02" (3/3) ... [2021-11-06 14:14:02,076 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2021-11-06 14:14:02,079 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:14:02,079 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-06 14:14:02,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:14:02,125 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 14:14:02,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-06 14:14:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 573 states have (on average 1.4328097731239093) internal successors, (821), 579 states have internal predecessors, (821), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-06 14:14:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-06 14:14:02,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:02,161 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 14:14:02,162 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 14:14:02,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:02,166 INFO L85 PathProgramCache]: Analyzing trace with hash 812919680, now seen corresponding path program 1 times [2021-11-06 14:14:02,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:02,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004998702] [2021-11-06 14:14:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:02,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:02,503 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 14:14:02,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:02,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004998702] [2021-11-06 14:14:02,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004998702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:02,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:02,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:02,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490888741] [2021-11-06 14:14:02,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:02,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:02,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:02,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:02,522 INFO L87 Difference]: Start difference. First operand has 590 states, 573 states have (on average 1.4328097731239093) internal successors, (821), 579 states have internal predecessors, (821), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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 14:14:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:03,080 INFO L93 Difference]: Finished difference Result 1716 states and 2450 transitions. [2021-11-06 14:14:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:03,081 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 14:14:03,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:03,097 INFO L225 Difference]: With dead ends: 1716 [2021-11-06 14:14:03,097 INFO L226 Difference]: Without dead ends: 1113 [2021-11-06 14:14:03,104 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 14:14:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-11-06 14:14:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1113. [2021-11-06 14:14:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1086 states have (on average 1.3977900552486189) internal successors, (1518), 1092 states have internal predecessors, (1518), 14 states have call successors, (14), 8 states have call predecessors, (14), 8 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-06 14:14:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1546 transitions. [2021-11-06 14:14:03,212 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1546 transitions. Word has length 17 [2021-11-06 14:14:03,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:03,213 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1546 transitions. [2021-11-06 14:14:03,213 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 14:14:03,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1546 transitions. [2021-11-06 14:14:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-06 14:14:03,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:03,216 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 14:14:03,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:14:03,219 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 14:14:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:03,221 INFO L85 PathProgramCache]: Analyzing trace with hash 366683969, now seen corresponding path program 1 times [2021-11-06 14:14:03,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:03,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58082622] [2021-11-06 14:14:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:03,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:03,378 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 14:14:03,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:03,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58082622] [2021-11-06 14:14:03,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58082622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:03,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:03,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:03,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541496587] [2021-11-06 14:14:03,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:03,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:03,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:03,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:03,386 INFO L87 Difference]: Start difference. First operand 1113 states and 1546 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 14:14:03,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:03,487 INFO L93 Difference]: Finished difference Result 3311 states and 4607 transitions. [2021-11-06 14:14:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:03,488 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 14:14:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:03,496 INFO L225 Difference]: With dead ends: 3311 [2021-11-06 14:14:03,496 INFO L226 Difference]: Without dead ends: 2211 [2021-11-06 14:14:03,499 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 14:14:03,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-11-06 14:14:03,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2199. [2021-11-06 14:14:03,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2150 states have (on average 1.3944186046511629) internal successors, (2998), 2158 states have internal predecessors, (2998), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 14:14:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 3054 transitions. [2021-11-06 14:14:03,549 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 3054 transitions. Word has length 24 [2021-11-06 14:14:03,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:03,549 INFO L470 AbstractCegarLoop]: Abstraction has 2199 states and 3054 transitions. [2021-11-06 14:14:03,549 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 14:14:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 3054 transitions. [2021-11-06 14:14:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-06 14:14:03,551 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:03,551 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 14:14:03,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:14:03,551 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 14:14:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:03,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1517698873, now seen corresponding path program 1 times [2021-11-06 14:14:03,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:03,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857646796] [2021-11-06 14:14:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:03,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:03,633 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 14:14:03,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:03,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857646796] [2021-11-06 14:14:03,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857646796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:03,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:03,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:03,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000107455] [2021-11-06 14:14:03,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:03,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:03,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:03,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:03,636 INFO L87 Difference]: Start difference. First operand 2199 states and 3054 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 14:14:03,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:03,676 INFO L93 Difference]: Finished difference Result 2199 states and 3054 transitions. [2021-11-06 14:14:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:03,677 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 14:14:03,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:03,684 INFO L225 Difference]: With dead ends: 2199 [2021-11-06 14:14:03,684 INFO L226 Difference]: Without dead ends: 2197 [2021-11-06 14:14:03,685 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 14:14:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-11-06 14:14:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2197. [2021-11-06 14:14:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2149 states have (on average 1.3941368078175895) internal successors, (2996), 2156 states have internal predecessors, (2996), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 14:14:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 3052 transitions. [2021-11-06 14:14:03,749 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 3052 transitions. Word has length 25 [2021-11-06 14:14:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:03,749 INFO L470 AbstractCegarLoop]: Abstraction has 2197 states and 3052 transitions. [2021-11-06 14:14:03,749 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 14:14:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 3052 transitions. [2021-11-06 14:14:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-06 14:14:03,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:03,752 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 14:14:03,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:14:03,752 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 14:14:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:03,753 INFO L85 PathProgramCache]: Analyzing trace with hash 195975179, now seen corresponding path program 1 times [2021-11-06 14:14:03,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:03,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010542997] [2021-11-06 14:14:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:03,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:03,848 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 14:14:03,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:03,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010542997] [2021-11-06 14:14:03,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010542997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:03,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:03,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:03,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778438646] [2021-11-06 14:14:03,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:03,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:03,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:03,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:03,855 INFO L87 Difference]: Start difference. First operand 2197 states and 3052 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 14:14:03,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:03,894 INFO L93 Difference]: Finished difference Result 2197 states and 3052 transitions. [2021-11-06 14:14:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:03,895 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 14:14:03,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:03,901 INFO L225 Difference]: With dead ends: 2197 [2021-11-06 14:14:03,901 INFO L226 Difference]: Without dead ends: 2195 [2021-11-06 14:14:03,901 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 14:14:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-11-06 14:14:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 2195. [2021-11-06 14:14:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2148 states have (on average 1.393854748603352) internal successors, (2994), 2154 states have internal predecessors, (2994), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 14:14:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 3050 transitions. [2021-11-06 14:14:03,952 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 3050 transitions. Word has length 26 [2021-11-06 14:14:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:03,953 INFO L470 AbstractCegarLoop]: Abstraction has 2195 states and 3050 transitions. [2021-11-06 14:14:03,953 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 14:14:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 3050 transitions. [2021-11-06 14:14:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-06 14:14:03,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:03,954 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 14:14:03,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:14:03,954 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 14:14:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:03,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1780263249, now seen corresponding path program 1 times [2021-11-06 14:14:03,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:03,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295722958] [2021-11-06 14:14:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:03,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:04,046 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 14:14:04,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:04,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295722958] [2021-11-06 14:14:04,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295722958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:04,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:04,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:04,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730233055] [2021-11-06 14:14:04,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:04,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:04,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:04,048 INFO L87 Difference]: Start difference. First operand 2195 states and 3050 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 14:14:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:04,090 INFO L93 Difference]: Finished difference Result 2195 states and 3050 transitions. [2021-11-06 14:14:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:04,091 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 14:14:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:04,097 INFO L225 Difference]: With dead ends: 2195 [2021-11-06 14:14:04,097 INFO L226 Difference]: Without dead ends: 2193 [2021-11-06 14:14:04,099 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 14:14:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2021-11-06 14:14:04,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2193. [2021-11-06 14:14:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2147 states have (on average 1.393572426641826) internal successors, (2992), 2152 states have internal predecessors, (2992), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 14:14:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 3048 transitions. [2021-11-06 14:14:04,154 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 3048 transitions. Word has length 27 [2021-11-06 14:14:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:04,155 INFO L470 AbstractCegarLoop]: Abstraction has 2193 states and 3048 transitions. [2021-11-06 14:14:04,155 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 14:14:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 3048 transitions. [2021-11-06 14:14:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-06 14:14:04,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:04,156 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 14:14:04,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:14:04,158 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 14:14:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash -646414123, now seen corresponding path program 1 times [2021-11-06 14:14:04,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:04,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351633611] [2021-11-06 14:14:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:04,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:04,244 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 14:14:04,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:04,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351633611] [2021-11-06 14:14:04,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351633611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:04,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:04,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:14:04,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514376990] [2021-11-06 14:14:04,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:04,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:04,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:04,250 INFO L87 Difference]: Start difference. First operand 2193 states and 3048 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 14:14:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:04,288 INFO L93 Difference]: Finished difference Result 2193 states and 3048 transitions. [2021-11-06 14:14:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:04,289 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 14:14:04,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:04,295 INFO L225 Difference]: With dead ends: 2193 [2021-11-06 14:14:04,295 INFO L226 Difference]: Without dead ends: 2184 [2021-11-06 14:14:04,296 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 14:14:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-11-06 14:14:04,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2184. [2021-11-06 14:14:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2139 states have (on average 1.3931743805516597) internal successors, (2980), 2143 states have internal predecessors, (2980), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 14:14:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3036 transitions. [2021-11-06 14:14:04,357 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3036 transitions. Word has length 28 [2021-11-06 14:14:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:04,358 INFO L470 AbstractCegarLoop]: Abstraction has 2184 states and 3036 transitions. [2021-11-06 14:14:04,359 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 14:14:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3036 transitions. [2021-11-06 14:14:04,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-06 14:14:04,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:04,362 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 14:14:04,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:14:04,362 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 14:14:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash 593395099, now seen corresponding path program 1 times [2021-11-06 14:14:04,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:04,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027363489] [2021-11-06 14:14:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:04,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:04,438 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 14:14:04,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:04,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027363489] [2021-11-06 14:14:04,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027363489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:04,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:04,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:04,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635370267] [2021-11-06 14:14:04,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:04,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:04,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:04,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:04,442 INFO L87 Difference]: Start difference. First operand 2184 states and 3036 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 14:14:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:04,538 INFO L93 Difference]: Finished difference Result 4886 states and 6761 transitions. [2021-11-06 14:14:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:04,539 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 14:14:04,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:04,546 INFO L225 Difference]: With dead ends: 4886 [2021-11-06 14:14:04,546 INFO L226 Difference]: Without dead ends: 2715 [2021-11-06 14:14:04,549 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 14:14:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2021-11-06 14:14:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2710. [2021-11-06 14:14:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2665 states have (on average 1.3793621013133208) internal successors, (3676), 2669 states have internal predecessors, (3676), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 14:14:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 3732 transitions. [2021-11-06 14:14:04,639 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 3732 transitions. Word has length 52 [2021-11-06 14:14:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:04,639 INFO L470 AbstractCegarLoop]: Abstraction has 2710 states and 3732 transitions. [2021-11-06 14:14:04,639 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 14:14:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 3732 transitions. [2021-11-06 14:14:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 14:14:04,641 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:04,641 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 14:14:04,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:14:04,642 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 14:14:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1400283468, now seen corresponding path program 1 times [2021-11-06 14:14:04,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:04,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963243920] [2021-11-06 14:14:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:04,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:04,699 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 14:14:04,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:04,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963243920] [2021-11-06 14:14:04,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963243920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:04,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:04,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:04,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817624961] [2021-11-06 14:14:04,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:04,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:04,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:04,701 INFO L87 Difference]: Start difference. First operand 2710 states and 3732 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 14:14:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:05,763 INFO L93 Difference]: Finished difference Result 5986 states and 8241 transitions. [2021-11-06 14:14:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:05,763 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 14:14:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:05,773 INFO L225 Difference]: With dead ends: 5986 [2021-11-06 14:14:05,774 INFO L226 Difference]: Without dead ends: 3289 [2021-11-06 14:14:05,779 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 14:14:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3289 states. [2021-11-06 14:14:05,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3289 to 3284. [2021-11-06 14:14:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 3239 states have (on average 1.3707934547699907) internal successors, (4440), 3243 states have internal predecessors, (4440), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 14:14:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 4496 transitions. [2021-11-06 14:14:05,896 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 4496 transitions. Word has length 62 [2021-11-06 14:14:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:05,896 INFO L470 AbstractCegarLoop]: Abstraction has 3284 states and 4496 transitions. [2021-11-06 14:14:05,897 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 14:14:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 4496 transitions. [2021-11-06 14:14:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 14:14:05,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:05,899 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 14:14:05,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:14:05,900 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 14:14:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:05,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1202855944, now seen corresponding path program 1 times [2021-11-06 14:14:05,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:05,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424541464] [2021-11-06 14:14:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:05,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:05,964 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 14:14:05,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:05,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424541464] [2021-11-06 14:14:05,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424541464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:05,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:05,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:05,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257551577] [2021-11-06 14:14:05,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:05,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:05,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:05,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:05,967 INFO L87 Difference]: Start difference. First operand 3284 states and 4496 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 14:14:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:07,494 INFO L93 Difference]: Finished difference Result 7698 states and 10569 transitions. [2021-11-06 14:14:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:07,494 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 14:14:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:07,509 INFO L225 Difference]: With dead ends: 7698 [2021-11-06 14:14:07,510 INFO L226 Difference]: Without dead ends: 4427 [2021-11-06 14:14:07,517 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 14:14:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2021-11-06 14:14:07,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 4422. [2021-11-06 14:14:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4341 states have (on average 1.373876986869385) internal successors, (5964), 4349 states have internal predecessors, (5964), 48 states have call successors, (48), 32 states have call predecessors, (48), 32 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-06 14:14:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6060 transitions. [2021-11-06 14:14:07,633 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6060 transitions. Word has length 74 [2021-11-06 14:14:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:07,633 INFO L470 AbstractCegarLoop]: Abstraction has 4422 states and 6060 transitions. [2021-11-06 14:14:07,633 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 14:14:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6060 transitions. [2021-11-06 14:14:07,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-06 14:14:07,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:07,636 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:07,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:14:07,637 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 14:14:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash 38724080, now seen corresponding path program 1 times [2021-11-06 14:14:07,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:07,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762352507] [2021-11-06 14:14:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:07,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:14:07,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:07,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762352507] [2021-11-06 14:14:07,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762352507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:07,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954774621] [2021-11-06 14:14:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:07,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:07,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:07,725 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 14:14:07,746 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 14:14:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:08,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:14:08,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 14:14:08,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954774621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:08,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:14:08,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-06 14:14:08,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131495329] [2021-11-06 14:14:08,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:14:08,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:08,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:14:08,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:08,357 INFO L87 Difference]: Start difference. First operand 4422 states and 6060 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 14:14:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:09,157 INFO L93 Difference]: Finished difference Result 13241 states and 18150 transitions. [2021-11-06 14:14:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:14:09,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 76 [2021-11-06 14:14:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:09,232 INFO L225 Difference]: With dead ends: 13241 [2021-11-06 14:14:09,233 INFO L226 Difference]: Without dead ends: 13236 [2021-11-06 14:14:09,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 14:14:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13236 states. [2021-11-06 14:14:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13236 to 13046. [2021-11-06 14:14:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13046 states, 12805 states have (on average 1.3771183131589222) internal successors, (17634), 12829 states have internal predecessors, (17634), 144 states have call successors, (144), 96 states have call predecessors, (144), 96 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2021-11-06 14:14:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13046 states to 13046 states and 17922 transitions. [2021-11-06 14:14:09,603 INFO L78 Accepts]: Start accepts. Automaton has 13046 states and 17922 transitions. Word has length 76 [2021-11-06 14:14:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:09,603 INFO L470 AbstractCegarLoop]: Abstraction has 13046 states and 17922 transitions. [2021-11-06 14:14:09,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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 14:14:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 13046 states and 17922 transitions. [2021-11-06 14:14:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 14:14:09,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:09,611 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] [2021-11-06 14:14:09,636 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 14:14:09,831 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,SelfDestructingSolverStorable9 [2021-11-06 14:14:09,832 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 14:14:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash -483700015, now seen corresponding path program 1 times [2021-11-06 14:14:09,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:09,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66588176] [2021-11-06 14:14:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:09,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:14:09,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:09,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66588176] [2021-11-06 14:14:09,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66588176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:09,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216177439] [2021-11-06 14:14:09,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:09,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:09,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:09,940 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 14:14:09,941 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 14:14:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:10,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:14:10,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:10,514 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 14:14:10,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216177439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:10,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:14:10,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-06 14:14:10,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689011188] [2021-11-06 14:14:10,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:10,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:14:10,517 INFO L87 Difference]: Start difference. First operand 13046 states and 17922 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 14:14:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:11,198 INFO L93 Difference]: Finished difference Result 19833 states and 27266 transitions. [2021-11-06 14:14:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:11,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 14:14:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:11,213 INFO L225 Difference]: With dead ends: 19833 [2021-11-06 14:14:11,214 INFO L226 Difference]: Without dead ends: 6433 [2021-11-06 14:14:11,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:14:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-11-06 14:14:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 6433. [2021-11-06 14:14:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6433 states, 6312 states have (on average 1.375) internal successors, (8679), 6324 states have internal predecessors, (8679), 72 states have call successors, (72), 48 states have call predecessors, (72), 48 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-06 14:14:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6433 states to 6433 states and 8823 transitions. [2021-11-06 14:14:11,417 INFO L78 Accepts]: Start accepts. Automaton has 6433 states and 8823 transitions. Word has length 83 [2021-11-06 14:14:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:11,417 INFO L470 AbstractCegarLoop]: Abstraction has 6433 states and 8823 transitions. [2021-11-06 14:14:11,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 14:14:11,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6433 states and 8823 transitions. [2021-11-06 14:14:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 14:14:11,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:11,422 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] [2021-11-06 14:14:11,444 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 14:14:11,641 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,SelfDestructingSolverStorable10 [2021-11-06 14:14:11,642 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 14:14:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1092841713, now seen corresponding path program 1 times [2021-11-06 14:14:11,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:11,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942372071] [2021-11-06 14:14:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:11,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-06 14:14:11,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:11,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942372071] [2021-11-06 14:14:11,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942372071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:11,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:11,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:11,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497010897] [2021-11-06 14:14:11,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:11,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:11,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:11,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:11,711 INFO L87 Difference]: Start difference. First operand 6433 states and 8823 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 14:14:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:11,996 INFO L93 Difference]: Finished difference Result 16645 states and 23003 transitions. [2021-11-06 14:14:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:11,997 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 86 [2021-11-06 14:14:11,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:12,022 INFO L225 Difference]: With dead ends: 16645 [2021-11-06 14:14:12,022 INFO L226 Difference]: Without dead ends: 10210 [2021-11-06 14:14:12,036 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 14:14:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2021-11-06 14:14:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 10159. [2021-11-06 14:14:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10159 states, 9918 states have (on average 1.3907037709215568) internal successors, (13793), 9942 states have internal predecessors, (13793), 144 states have call successors, (144), 96 states have call predecessors, (144), 96 states have return successors, (144), 144 states have call predecessors, (144), 144 states have call successors, (144) [2021-11-06 14:14:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10159 states to 10159 states and 14081 transitions. [2021-11-06 14:14:12,331 INFO L78 Accepts]: Start accepts. Automaton has 10159 states and 14081 transitions. Word has length 86 [2021-11-06 14:14:12,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:12,331 INFO L470 AbstractCegarLoop]: Abstraction has 10159 states and 14081 transitions. [2021-11-06 14:14:12,331 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 14:14:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 10159 states and 14081 transitions. [2021-11-06 14:14:12,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 14:14:12,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:12,340 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] [2021-11-06 14:14:12,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 14:14:12,341 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 14:14:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1975174479, now seen corresponding path program 2 times [2021-11-06 14:14:12,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:12,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529744306] [2021-11-06 14:14:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:12,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:14:12,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:12,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529744306] [2021-11-06 14:14:12,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529744306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:12,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:12,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:12,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819714752] [2021-11-06 14:14:12,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:12,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:12,443 INFO L87 Difference]: Start difference. First operand 10159 states and 14081 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:13,124 INFO L93 Difference]: Finished difference Result 21653 states and 30099 transitions. [2021-11-06 14:14:13,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:13,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-06 14:14:13,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:13,153 INFO L225 Difference]: With dead ends: 21653 [2021-11-06 14:14:13,153 INFO L226 Difference]: Without dead ends: 11507 [2021-11-06 14:14:13,172 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 14:14:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2021-11-06 14:14:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 11227. [2021-11-06 14:14:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11227 states, 10946 states have (on average 1.3945733601315549) internal successors, (15265), 10974 states have internal predecessors, (15265), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:13,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11227 states to 11227 states and 15601 transitions. [2021-11-06 14:14:13,500 INFO L78 Accepts]: Start accepts. Automaton has 11227 states and 15601 transitions. Word has length 86 [2021-11-06 14:14:13,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:13,500 INFO L470 AbstractCegarLoop]: Abstraction has 11227 states and 15601 transitions. [2021-11-06 14:14:13,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:13,500 INFO L276 IsEmpty]: Start isEmpty. Operand 11227 states and 15601 transitions. [2021-11-06 14:14:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-06 14:14:13,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:13,504 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] [2021-11-06 14:14:13,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 14:14:13,505 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 14:14:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash -401392373, now seen corresponding path program 1 times [2021-11-06 14:14:13,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:13,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054214027] [2021-11-06 14:14:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:13,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 14:14:13,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:13,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054214027] [2021-11-06 14:14:13,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054214027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:13,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495575064] [2021-11-06 14:14:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:13,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:13,580 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 14:14:13,581 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 14:14:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:14,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:14:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:14,205 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 14:14:14,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495575064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:14,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:14:14,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 14:14:14,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725404602] [2021-11-06 14:14:14,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:14,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:14,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:14,207 INFO L87 Difference]: Start difference. First operand 11227 states and 15601 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 14:14:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:15,279 INFO L93 Difference]: Finished difference Result 21845 states and 30398 transitions. [2021-11-06 14:14:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 88 [2021-11-06 14:14:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:15,305 INFO L225 Difference]: With dead ends: 21845 [2021-11-06 14:14:15,306 INFO L226 Difference]: Without dead ends: 10808 [2021-11-06 14:14:15,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10808 states. [2021-11-06 14:14:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10808 to 10803. [2021-11-06 14:14:15,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10803 states, 10522 states have (on average 1.3928910853449914) internal successors, (14656), 10550 states have internal predecessors, (14656), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10803 states to 10803 states and 14992 transitions. [2021-11-06 14:14:15,590 INFO L78 Accepts]: Start accepts. Automaton has 10803 states and 14992 transitions. Word has length 88 [2021-11-06 14:14:15,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:15,591 INFO L470 AbstractCegarLoop]: Abstraction has 10803 states and 14992 transitions. [2021-11-06 14:14:15,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 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 14:14:15,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10803 states and 14992 transitions. [2021-11-06 14:14:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-06 14:14:15,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:15,595 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] [2021-11-06 14:14:15,614 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 14:14:15,814 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 14:14:15,814 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 14:14:15,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2088136589, now seen corresponding path program 1 times [2021-11-06 14:14:15,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:15,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503722706] [2021-11-06 14:14:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:15,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:15,945 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 14:14:15,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:15,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503722706] [2021-11-06 14:14:15,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503722706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:15,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:15,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:14:15,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51583493] [2021-11-06 14:14:15,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:14:15,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:15,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:14:15,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:14:15,947 INFO L87 Difference]: Start difference. First operand 10803 states and 14992 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 14:14:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:16,341 INFO L93 Difference]: Finished difference Result 32188 states and 44536 transitions. [2021-11-06 14:14:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:14:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 88 [2021-11-06 14:14:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:16,394 INFO L225 Difference]: With dead ends: 32188 [2021-11-06 14:14:16,394 INFO L226 Difference]: Without dead ends: 21575 [2021-11-06 14:14:16,416 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 14:14:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21575 states. [2021-11-06 14:14:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21575 to 10831. [2021-11-06 14:14:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10831 states, 10550 states have (on average 1.3918483412322276) internal successors, (14684), 10578 states have internal predecessors, (14684), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10831 states to 10831 states and 15020 transitions. [2021-11-06 14:14:16,853 INFO L78 Accepts]: Start accepts. Automaton has 10831 states and 15020 transitions. Word has length 88 [2021-11-06 14:14:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:16,854 INFO L470 AbstractCegarLoop]: Abstraction has 10831 states and 15020 transitions. [2021-11-06 14:14:16,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 14:14:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 10831 states and 15020 transitions. [2021-11-06 14:14:16,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 14:14:16,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:16,860 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] [2021-11-06 14:14:16,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 14:14:16,860 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 14:14:16,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:16,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1530586731, now seen corresponding path program 1 times [2021-11-06 14:14:16,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:16,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612499689] [2021-11-06 14:14:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:16,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:16,971 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 14:14:16,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:16,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612499689] [2021-11-06 14:14:16,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612499689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:16,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:16,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:14:16,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17187294] [2021-11-06 14:14:16,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:14:16,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:14:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:14:16,973 INFO L87 Difference]: Start difference. First operand 10831 states and 15020 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 14:14:17,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:17,974 INFO L93 Difference]: Finished difference Result 40545 states and 55948 transitions. [2021-11-06 14:14:17,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:14:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 89 [2021-11-06 14:14:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:18,040 INFO L225 Difference]: With dead ends: 40545 [2021-11-06 14:14:18,042 INFO L226 Difference]: Without dead ends: 29904 [2021-11-06 14:14:18,061 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 14:14:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29904 states. [2021-11-06 14:14:18,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29904 to 10943. [2021-11-06 14:14:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10943 states, 10662 states have (on average 1.390358281748265) internal successors, (14824), 10690 states have internal predecessors, (14824), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:18,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10943 states to 10943 states and 15160 transitions. [2021-11-06 14:14:18,738 INFO L78 Accepts]: Start accepts. Automaton has 10943 states and 15160 transitions. Word has length 89 [2021-11-06 14:14:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:18,738 INFO L470 AbstractCegarLoop]: Abstraction has 10943 states and 15160 transitions. [2021-11-06 14:14:18,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 14:14:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10943 states and 15160 transitions. [2021-11-06 14:14:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-06 14:14:18,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:18,743 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] [2021-11-06 14:14:18,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 14:14:18,743 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 14:14:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash 859087929, now seen corresponding path program 1 times [2021-11-06 14:14:18,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:18,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324750665] [2021-11-06 14:14:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:18,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:18,936 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 14:14:18,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:18,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324750665] [2021-11-06 14:14:18,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324750665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:18,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:18,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 14:14:18,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104639064] [2021-11-06 14:14:18,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:14:18,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:18,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:14:18,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:14:18,939 INFO L87 Difference]: Start difference. First operand 10943 states and 15160 transitions. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 14:14:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:24,523 INFO L93 Difference]: Finished difference Result 72345 states and 99583 transitions. [2021-11-06 14:14:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-06 14:14:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 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 14:14:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:24,649 INFO L225 Difference]: With dead ends: 72345 [2021-11-06 14:14:24,649 INFO L226 Difference]: Without dead ends: 61592 [2021-11-06 14:14:24,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=896, Invalid=3796, Unknown=0, NotChecked=0, Total=4692 [2021-11-06 14:14:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61592 states. [2021-11-06 14:14:25,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61592 to 10943. [2021-11-06 14:14:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10943 states, 10662 states have (on average 1.3897017445132245) internal successors, (14817), 10690 states have internal predecessors, (14817), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10943 states to 10943 states and 15153 transitions. [2021-11-06 14:14:25,613 INFO L78 Accepts]: Start accepts. Automaton has 10943 states and 15153 transitions. Word has length 91 [2021-11-06 14:14:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:25,613 INFO L470 AbstractCegarLoop]: Abstraction has 10943 states and 15153 transitions. [2021-11-06 14:14:25,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 14:14:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 10943 states and 15153 transitions. [2021-11-06 14:14:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 14:14:25,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:25,619 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] [2021-11-06 14:14:25,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 14:14:25,619 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 14:14:25,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:25,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1126116685, now seen corresponding path program 1 times [2021-11-06 14:14:25,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:25,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146642767] [2021-11-06 14:14:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:25,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:25,943 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 14:14:25,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:25,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146642767] [2021-11-06 14:14:25,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146642767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:25,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:25,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-06 14:14:25,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841645061] [2021-11-06 14:14:25,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:14:25,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:25,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:14:25,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:14:25,945 INFO L87 Difference]: Start difference. First operand 10943 states and 15153 transitions. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:36,067 INFO L93 Difference]: Finished difference Result 74524 states and 102528 transitions. [2021-11-06 14:14:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-06 14:14:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-06 14:14:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:36,233 INFO L225 Difference]: With dead ends: 74524 [2021-11-06 14:14:36,234 INFO L226 Difference]: Without dead ends: 63579 [2021-11-06 14:14:36,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1485, Invalid=5997, Unknown=0, NotChecked=0, Total=7482 [2021-11-06 14:14:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63579 states. [2021-11-06 14:14:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63579 to 13928. [2021-11-06 14:14:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13928 states, 13647 states have (on average 1.3844801055176963) internal successors, (18894), 13675 states have internal predecessors, (18894), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13928 states to 13928 states and 19230 transitions. [2021-11-06 14:14:37,676 INFO L78 Accepts]: Start accepts. Automaton has 13928 states and 19230 transitions. Word has length 97 [2021-11-06 14:14:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:37,677 INFO L470 AbstractCegarLoop]: Abstraction has 13928 states and 19230 transitions. [2021-11-06 14:14:37,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:37,677 INFO L276 IsEmpty]: Start isEmpty. Operand 13928 states and 19230 transitions. [2021-11-06 14:14:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-06 14:14:37,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:37,686 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 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] [2021-11-06 14:14:37,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-06 14:14:37,687 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 14:14:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash -881987495, now seen corresponding path program 1 times [2021-11-06 14:14:37,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:37,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582815212] [2021-11-06 14:14:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:37,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-06 14:14:37,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:37,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582815212] [2021-11-06 14:14:37,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582815212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:37,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:37,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:14:37,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438159732] [2021-11-06 14:14:37,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:14:37,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:14:37,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:14:37,749 INFO L87 Difference]: Start difference. First operand 13928 states and 19230 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:14:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:40,530 INFO L93 Difference]: Finished difference Result 35121 states and 48345 transitions. [2021-11-06 14:14:40,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:14:40,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 14:14:40,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:40,575 INFO L225 Difference]: With dead ends: 35121 [2021-11-06 14:14:40,576 INFO L226 Difference]: Without dead ends: 21206 [2021-11-06 14:14:40,597 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 14:14:40,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21206 states. [2021-11-06 14:14:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21206 to 13980. [2021-11-06 14:14:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13980 states, 13699 states have (on average 1.383020658442222) internal successors, (18946), 13727 states have internal predecessors, (18946), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:41,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13980 states to 13980 states and 19282 transitions. [2021-11-06 14:14:41,694 INFO L78 Accepts]: Start accepts. Automaton has 13980 states and 19282 transitions. Word has length 115 [2021-11-06 14:14:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:41,694 INFO L470 AbstractCegarLoop]: Abstraction has 13980 states and 19282 transitions. [2021-11-06 14:14:41,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 14:14:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 13980 states and 19282 transitions. [2021-11-06 14:14:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-06 14:14:41,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:41,703 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 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 14:14:41,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-06 14:14:41,704 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 14:14:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash 809322604, now seen corresponding path program 1 times [2021-11-06 14:14:41,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:41,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532718795] [2021-11-06 14:14:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:41,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-06 14:14:41,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:41,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532718795] [2021-11-06 14:14:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532718795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:41,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:41,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:14:41,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854901341] [2021-11-06 14:14:41,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:14:41,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:14:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:14:41,765 INFO L87 Difference]: Start difference. First operand 13980 states and 19282 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:45,102 INFO L93 Difference]: Finished difference Result 35251 states and 48475 transitions. [2021-11-06 14:14:45,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:14:45,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-06 14:14:45,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:45,138 INFO L225 Difference]: With dead ends: 35251 [2021-11-06 14:14:45,138 INFO L226 Difference]: Without dead ends: 21284 [2021-11-06 14:14:45,158 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 14:14:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21284 states. [2021-11-06 14:14:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21284 to 13980. [2021-11-06 14:14:46,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13980 states, 13699 states have (on average 1.383020658442222) internal successors, (18946), 13727 states have internal predecessors, (18946), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13980 states to 13980 states and 19282 transitions. [2021-11-06 14:14:46,353 INFO L78 Accepts]: Start accepts. Automaton has 13980 states and 19282 transitions. Word has length 119 [2021-11-06 14:14:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:46,353 INFO L470 AbstractCegarLoop]: Abstraction has 13980 states and 19282 transitions. [2021-11-06 14:14:46,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 13980 states and 19282 transitions. [2021-11-06 14:14:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-06 14:14:46,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:46,364 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:46,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-06 14:14:46,365 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 14:14:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:46,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2068841235, now seen corresponding path program 1 times [2021-11-06 14:14:46,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:46,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774514697] [2021-11-06 14:14:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:46,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-06 14:14:46,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:46,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774514697] [2021-11-06 14:14:46,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774514697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:46,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:46,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:46,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768585773] [2021-11-06 14:14:46,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:46,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:46,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:46,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:46,438 INFO L87 Difference]: Start difference. First operand 13980 states and 19282 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:47,499 INFO L93 Difference]: Finished difference Result 27999 states and 38627 transitions. [2021-11-06 14:14:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-06 14:14:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:47,526 INFO L225 Difference]: With dead ends: 27999 [2021-11-06 14:14:47,527 INFO L226 Difference]: Without dead ends: 14032 [2021-11-06 14:14:47,545 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 14:14:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14032 states. [2021-11-06 14:14:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14032 to 14006. [2021-11-06 14:14:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14006 states, 13725 states have (on average 1.382295081967213) internal successors, (18972), 13753 states have internal predecessors, (18972), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14006 states to 14006 states and 19308 transitions. [2021-11-06 14:14:48,712 INFO L78 Accepts]: Start accepts. Automaton has 14006 states and 19308 transitions. Word has length 140 [2021-11-06 14:14:48,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:48,712 INFO L470 AbstractCegarLoop]: Abstraction has 14006 states and 19308 transitions. [2021-11-06 14:14:48,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:48,712 INFO L276 IsEmpty]: Start isEmpty. Operand 14006 states and 19308 transitions. [2021-11-06 14:14:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-06 14:14:48,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:48,721 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:48,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-06 14:14:48,722 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 14:14:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1325074740, now seen corresponding path program 1 times [2021-11-06 14:14:48,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:48,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345038110] [2021-11-06 14:14:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:48,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-06 14:14:48,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:48,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345038110] [2021-11-06 14:14:48,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345038110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:48,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:48,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:14:48,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089939451] [2021-11-06 14:14:48,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:14:48,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:14:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:14:48,791 INFO L87 Difference]: Start difference. First operand 14006 states and 19308 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 14:14:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:50,651 INFO L93 Difference]: Finished difference Result 35941 states and 49479 transitions. [2021-11-06 14:14:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:14:50,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 140 [2021-11-06 14:14:50,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:50,695 INFO L225 Difference]: With dead ends: 35941 [2021-11-06 14:14:50,695 INFO L226 Difference]: Without dead ends: 22128 [2021-11-06 14:14:50,720 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 14:14:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22128 states. [2021-11-06 14:14:51,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22128 to 14048. [2021-11-06 14:14:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 13767 states have (on average 1.3811287862279364) internal successors, (19014), 13795 states have internal predecessors, (19014), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 19350 transitions. [2021-11-06 14:14:51,978 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 19350 transitions. Word has length 140 [2021-11-06 14:14:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:51,979 INFO L470 AbstractCegarLoop]: Abstraction has 14048 states and 19350 transitions. [2021-11-06 14:14:51,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states 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 14:14:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 19350 transitions. [2021-11-06 14:14:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-06 14:14:51,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:51,988 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:51,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-06 14:14:51,988 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 14:14:51,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:51,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1835795162, now seen corresponding path program 1 times [2021-11-06 14:14:51,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:51,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511984080] [2021-11-06 14:14:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:51,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:14:52,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:52,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511984080] [2021-11-06 14:14:52,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511984080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:14:52,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:14:52,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:14:52,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003442714] [2021-11-06 14:14:52,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:14:52,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:14:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:14:52,062 INFO L87 Difference]: Start difference. First operand 14048 states and 19350 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 14:14:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:53,249 INFO L93 Difference]: Finished difference Result 28163 states and 38805 transitions. [2021-11-06 14:14:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:14:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 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 142 [2021-11-06 14:14:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:53,273 INFO L225 Difference]: With dead ends: 28163 [2021-11-06 14:14:53,273 INFO L226 Difference]: Without dead ends: 14128 [2021-11-06 14:14:53,288 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 14:14:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14128 states. [2021-11-06 14:14:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14128 to 14088. [2021-11-06 14:14:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14088 states, 13807 states have (on average 1.380024625190121) internal successors, (19054), 13835 states have internal predecessors, (19054), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14088 states to 14088 states and 19390 transitions. [2021-11-06 14:14:54,419 INFO L78 Accepts]: Start accepts. Automaton has 14088 states and 19390 transitions. Word has length 142 [2021-11-06 14:14:54,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:54,419 INFO L470 AbstractCegarLoop]: Abstraction has 14088 states and 19390 transitions. [2021-11-06 14:14:54,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 14:14:54,420 INFO L276 IsEmpty]: Start isEmpty. Operand 14088 states and 19390 transitions. [2021-11-06 14:14:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-06 14:14:54,428 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:54,428 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:54,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-06 14:14:54,428 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 14:14:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:54,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1798951761, now seen corresponding path program 1 times [2021-11-06 14:14:54,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:54,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111047867] [2021-11-06 14:14:54,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:54,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-06 14:14:54,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:54,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111047867] [2021-11-06 14:14:54,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111047867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:54,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728817048] [2021-11-06 14:14:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:54,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:54,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:54,496 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 14:14:54,497 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 14:14:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:14:55,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-06 14:14:55,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728817048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:55,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:55,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 14:14:55,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733737133] [2021-11-06 14:14:55,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:14:55,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:55,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:14:55,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:55,265 INFO L87 Difference]: Start difference. First operand 14088 states and 19390 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:14:56,501 INFO L93 Difference]: Finished difference Result 28241 states and 38869 transitions. [2021-11-06 14:14:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:14:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-11-06 14:14:56,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:14:56,528 INFO L225 Difference]: With dead ends: 28241 [2021-11-06 14:14:56,528 INFO L226 Difference]: Without dead ends: 14166 [2021-11-06 14:14:56,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 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 14:14:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14166 states. [2021-11-06 14:14:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14166 to 14140. [2021-11-06 14:14:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14140 states, 13859 states have (on average 1.37859874449816) internal successors, (19106), 13887 states have internal predecessors, (19106), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:14:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14140 states to 14140 states and 19442 transitions. [2021-11-06 14:14:57,700 INFO L78 Accepts]: Start accepts. Automaton has 14140 states and 19442 transitions. Word has length 144 [2021-11-06 14:14:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:14:57,700 INFO L470 AbstractCegarLoop]: Abstraction has 14140 states and 19442 transitions. [2021-11-06 14:14:57,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:14:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 14140 states and 19442 transitions. [2021-11-06 14:14:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-06 14:14:57,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:14:57,709 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:14:57,731 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 14:14:57,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:57,914 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 14:14:57,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:14:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash -894810166, now seen corresponding path program 1 times [2021-11-06 14:14:57,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:14:57,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105684829] [2021-11-06 14:14:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:57,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:14:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:14:58,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:14:58,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105684829] [2021-11-06 14:14:58,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105684829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:58,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81430814] [2021-11-06 14:14:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:14:58,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:14:58,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:14:58,027 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 14:14:58,029 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 14:14:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:14:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:14:58,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:14:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:14:58,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81430814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:14:58,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:14:58,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 14:14:58,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192086413] [2021-11-06 14:14:58,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:14:58,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:14:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:14:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:14:58,775 INFO L87 Difference]: Start difference. First operand 14140 states and 19442 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 14:15:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:00,039 INFO L93 Difference]: Finished difference Result 28387 states and 39029 transitions. [2021-11-06 14:15:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:15:00,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 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 144 [2021-11-06 14:15:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:00,061 INFO L225 Difference]: With dead ends: 28387 [2021-11-06 14:15:00,061 INFO L226 Difference]: Without dead ends: 14260 [2021-11-06 14:15:00,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 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 14:15:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14260 states. [2021-11-06 14:15:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14260 to 14220. [2021-11-06 14:15:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14220 states, 13939 states have (on average 1.376425855513308) internal successors, (19186), 13967 states have internal predecessors, (19186), 168 states have call successors, (168), 112 states have call predecessors, (168), 112 states have return successors, (168), 168 states have call predecessors, (168), 168 states have call successors, (168) [2021-11-06 14:15:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14220 states to 14220 states and 19522 transitions. [2021-11-06 14:15:01,240 INFO L78 Accepts]: Start accepts. Automaton has 14220 states and 19522 transitions. Word has length 144 [2021-11-06 14:15:01,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:01,241 INFO L470 AbstractCegarLoop]: Abstraction has 14220 states and 19522 transitions. [2021-11-06 14:15:01,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 14:15:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 14220 states and 19522 transitions. [2021-11-06 14:15:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-06 14:15:01,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:01,247 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:01,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:01,449 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,SelfDestructingSolverStorable24 [2021-11-06 14:15:01,450 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 14:15:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2013310283, now seen corresponding path program 2 times [2021-11-06 14:15:01,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:01,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981252514] [2021-11-06 14:15:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:01,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-06 14:15:01,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:01,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981252514] [2021-11-06 14:15:01,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981252514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:01,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285158493] [2021-11-06 14:15:01,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:15:01,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:01,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:01,555 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:01,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 14:15:03,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:15:03,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1946 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:15:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-06 14:15:03,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285158493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:03,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:03,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-06 14:15:03,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42867945] [2021-11-06 14:15:03,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:15:03,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:03,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:15:03,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:15:03,785 INFO L87 Difference]: Start difference. First operand 14220 states and 19522 transitions. Second operand has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 14:15:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:07,822 INFO L93 Difference]: Finished difference Result 50342 states and 69312 transitions. [2021-11-06 14:15:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:15:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-06 14:15:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:07,891 INFO L225 Difference]: With dead ends: 50342 [2021-11-06 14:15:07,891 INFO L226 Difference]: Without dead ends: 36135 [2021-11-06 14:15:07,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 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 14:15:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36135 states. [2021-11-06 14:15:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36135 to 22682. [2021-11-06 14:15:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22682 states, 22241 states have (on average 1.375387797311272) internal successors, (30590), 22285 states have internal predecessors, (30590), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:15:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22682 states to 22682 states and 31118 transitions. [2021-11-06 14:15:10,030 INFO L78 Accepts]: Start accepts. Automaton has 22682 states and 31118 transitions. Word has length 146 [2021-11-06 14:15:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:10,031 INFO L470 AbstractCegarLoop]: Abstraction has 22682 states and 31118 transitions. [2021-11-06 14:15:10,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.428571428571427) internal successors, (199), 7 states have internal predecessors, (199), 0 states have call successors, (0), 0 states 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 14:15:10,031 INFO L276 IsEmpty]: Start isEmpty. Operand 22682 states and 31118 transitions. [2021-11-06 14:15:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-06 14:15:10,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:10,041 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:10,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-06 14:15:10,242 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,SelfDestructingSolverStorable25 [2021-11-06 14:15:10,242 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 14:15:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:10,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1448638830, now seen corresponding path program 2 times [2021-11-06 14:15:10,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:10,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220958680] [2021-11-06 14:15:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:10,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:15:10,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:10,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220958680] [2021-11-06 14:15:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220958680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:10,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158223891] [2021-11-06 14:15:10,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:15:10,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:10,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:10,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:15:10,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 14:15:12,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:15:12,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:15:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:15:12,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158223891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:12,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:12,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 14:15:12,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067034416] [2021-11-06 14:15:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:15:12,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:15:12,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:15:12,862 INFO L87 Difference]: Start difference. First operand 22682 states and 31118 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 14:15:14,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:14,963 INFO L93 Difference]: Finished difference Result 45507 states and 62429 transitions. [2021-11-06 14:15:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:15:14,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-06 14:15:14,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:15,008 INFO L225 Difference]: With dead ends: 45507 [2021-11-06 14:15:15,008 INFO L226 Difference]: Without dead ends: 22838 [2021-11-06 14:15:15,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:15:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22838 states. [2021-11-06 14:15:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22838 to 22786. [2021-11-06 14:15:17,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22786 states, 22345 states have (on average 1.3736406354889237) internal successors, (30694), 22389 states have internal predecessors, (30694), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:15:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22786 states to 22786 states and 31222 transitions. [2021-11-06 14:15:17,143 INFO L78 Accepts]: Start accepts. Automaton has 22786 states and 31222 transitions. Word has length 146 [2021-11-06 14:15:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:17,143 INFO L470 AbstractCegarLoop]: Abstraction has 22786 states and 31222 transitions. [2021-11-06 14:15:17,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 14:15:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 22786 states and 31222 transitions. [2021-11-06 14:15:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 14:15:17,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:17,152 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:17,177 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 14:15:17,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:17,360 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 14:15:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1354706414, now seen corresponding path program 3 times [2021-11-06 14:15:17,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:17,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509080113] [2021-11-06 14:15:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:17,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:15:17,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:17,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509080113] [2021-11-06 14:15:17,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509080113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:17,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372720382] [2021-11-06 14:15:17,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:15:17,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:17,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:17,489 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 14:15:17,522 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 14:15:21,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:15:21,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:21,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:15:21,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-06 14:15:21,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372720382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:21,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:15:21,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-06 14:15:21,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184409355] [2021-11-06 14:15:21,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:15:21,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:21,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:15:21,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:15:21,515 INFO L87 Difference]: Start difference. First operand 22786 states and 31222 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 14:15:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:27,150 INFO L93 Difference]: Finished difference Result 54483 states and 74168 transitions. [2021-11-06 14:15:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:15:27,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-06 14:15:27,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:27,228 INFO L225 Difference]: With dead ends: 54483 [2021-11-06 14:15:27,228 INFO L226 Difference]: Without dead ends: 31710 [2021-11-06 14:15:27,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:15:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31710 states. [2021-11-06 14:15:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31710 to 22453. [2021-11-06 14:15:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22453 states, 22012 states have (on average 1.3641650009085953) internal successors, (30028), 22056 states have internal predecessors, (30028), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:15:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22453 states to 22453 states and 30556 transitions. [2021-11-06 14:15:29,405 INFO L78 Accepts]: Start accepts. Automaton has 22453 states and 30556 transitions. Word has length 148 [2021-11-06 14:15:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:29,405 INFO L470 AbstractCegarLoop]: Abstraction has 22453 states and 30556 transitions. [2021-11-06 14:15:29,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 14:15:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand 22453 states and 30556 transitions. [2021-11-06 14:15:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 14:15:29,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:29,415 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:29,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:29,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-06 14:15:29,621 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 14:15:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2147309074, now seen corresponding path program 1 times [2021-11-06 14:15:29,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:29,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381801655] [2021-11-06 14:15:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:29,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:15:29,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:29,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381801655] [2021-11-06 14:15:29,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381801655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:29,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843185937] [2021-11-06 14:15:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:29,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:29,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:29,728 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 14:15:29,729 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 14:15:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:30,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:15:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:15:30,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843185937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:30,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:30,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 14:15:30,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273955093] [2021-11-06 14:15:30,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:15:30,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:15:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:15:30,608 INFO L87 Difference]: Start difference. First operand 22453 states and 30556 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:32,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:32,785 INFO L93 Difference]: Finished difference Result 45049 states and 61305 transitions. [2021-11-06 14:15:32,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:15:32,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-06 14:15:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:32,830 INFO L225 Difference]: With dead ends: 45049 [2021-11-06 14:15:32,830 INFO L226 Difference]: Without dead ends: 22609 [2021-11-06 14:15:32,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 14:15:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22609 states. [2021-11-06 14:15:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22609 to 22557. [2021-11-06 14:15:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22557 states, 22116 states have (on average 1.3624525230602278) internal successors, (30132), 22160 states have internal predecessors, (30132), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:15:34,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22557 states to 22557 states and 30660 transitions. [2021-11-06 14:15:34,972 INFO L78 Accepts]: Start accepts. Automaton has 22557 states and 30660 transitions. Word has length 148 [2021-11-06 14:15:34,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:34,972 INFO L470 AbstractCegarLoop]: Abstraction has 22557 states and 30660 transitions. [2021-11-06 14:15:34,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 22557 states and 30660 transitions. [2021-11-06 14:15:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-06 14:15:34,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:34,983 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:35,006 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 14:15:35,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-06 14:15:35,184 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 14:15:35,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:35,184 INFO L85 PathProgramCache]: Analyzing trace with hash 52499894, now seen corresponding path program 2 times [2021-11-06 14:15:35,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:35,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127650806] [2021-11-06 14:15:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:35,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:15:35,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:35,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127650806] [2021-11-06 14:15:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127650806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:35,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508046684] [2021-11-06 14:15:35,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:15:35,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:35,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:35,292 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 14:15:35,319 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 14:15:37,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:15:37,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1876 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:15:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:15:38,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508046684] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:38,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:38,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-06 14:15:38,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182205151] [2021-11-06 14:15:38,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:15:38,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:38,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:15:38,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:15:38,065 INFO L87 Difference]: Start difference. First operand 22557 states and 30660 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:40,235 INFO L93 Difference]: Finished difference Result 45257 states and 61513 transitions. [2021-11-06 14:15:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:15:40,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-11-06 14:15:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:40,279 INFO L225 Difference]: With dead ends: 45257 [2021-11-06 14:15:40,279 INFO L226 Difference]: Without dead ends: 22713 [2021-11-06 14:15:40,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 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 14:15:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22713 states. [2021-11-06 14:15:42,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22713 to 22661. [2021-11-06 14:15:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22661 states, 22220 states have (on average 1.3607560756075607) internal successors, (30236), 22264 states have internal predecessors, (30236), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:15:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22661 states to 22661 states and 30764 transitions. [2021-11-06 14:15:42,477 INFO L78 Accepts]: Start accepts. Automaton has 22661 states and 30764 transitions. Word has length 150 [2021-11-06 14:15:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:42,477 INFO L470 AbstractCegarLoop]: Abstraction has 22661 states and 30764 transitions. [2021-11-06 14:15:42,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:15:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22661 states and 30764 transitions. [2021-11-06 14:15:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-06 14:15:42,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:42,486 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:42,512 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 14:15:42,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:42,690 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 14:15:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:42,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1280539738, now seen corresponding path program 3 times [2021-11-06 14:15:42,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:42,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410594513] [2021-11-06 14:15:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:42,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-06 14:15:42,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:42,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410594513] [2021-11-06 14:15:42,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410594513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:42,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390595695] [2021-11-06 14:15:42,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:15:42,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:42,826 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 14:15:42,827 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 14:15:46,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:15:46,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:15:46,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 14:15:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-06 14:15:46,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390595695] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:15:46,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:15:46,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-06 14:15:46,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142524419] [2021-11-06 14:15:46,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:15:46,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:15:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:15:46,537 INFO L87 Difference]: Start difference. First operand 22661 states and 30764 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 14:15:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:52,014 INFO L93 Difference]: Finished difference Result 54737 states and 74089 transitions. [2021-11-06 14:15:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:15:52,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 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 152 [2021-11-06 14:15:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:52,088 INFO L225 Difference]: With dead ends: 54737 [2021-11-06 14:15:52,088 INFO L226 Difference]: Without dead ends: 32089 [2021-11-06 14:15:52,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:15:52,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32089 states. [2021-11-06 14:15:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32089 to 22772. [2021-11-06 14:15:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22772 states, 22331 states have (on average 1.3589628767184632) internal successors, (30347), 22375 states have internal predecessors, (30347), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:15:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22772 states to 22772 states and 30875 transitions. [2021-11-06 14:15:54,349 INFO L78 Accepts]: Start accepts. Automaton has 22772 states and 30875 transitions. Word has length 152 [2021-11-06 14:15:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:15:54,349 INFO L470 AbstractCegarLoop]: Abstraction has 22772 states and 30875 transitions. [2021-11-06 14:15:54,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states 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 14:15:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 22772 states and 30875 transitions. [2021-11-06 14:15:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-06 14:15:54,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:15:54,360 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:15:54,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-06 14:15:54,565 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,SelfDestructingSolverStorable30 [2021-11-06 14:15:54,565 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 14:15:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:15:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash -593152379, now seen corresponding path program 1 times [2021-11-06 14:15:54,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:15:54,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045922149] [2021-11-06 14:15:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:54,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:15:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:54,759 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-06 14:15:54,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:15:54,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045922149] [2021-11-06 14:15:54,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045922149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:54,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391641137] [2021-11-06 14:15:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:15:54,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:15:54,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:15:54,761 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 14:15:54,763 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 14:15:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:15:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:15:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:15:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 50 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-06 14:15:55,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391641137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:15:55,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:15:55,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-06 14:15:55,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654370134] [2021-11-06 14:15:55,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:15:55,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:15:55,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:15:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:15:55,755 INFO L87 Difference]: Start difference. First operand 22772 states and 30875 transitions. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 14:15:58,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:15:58,055 INFO L93 Difference]: Finished difference Result 45687 states and 61943 transitions. [2021-11-06 14:15:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 14:15:58,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-06 14:15:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:15:58,093 INFO L225 Difference]: With dead ends: 45687 [2021-11-06 14:15:58,094 INFO L226 Difference]: Without dead ends: 22928 [2021-11-06 14:15:58,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 153 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 14:15:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22928 states. [2021-11-06 14:16:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22928 to 22876. [2021-11-06 14:16:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22876 states, 22435 states have (on average 1.3572988633831067) internal successors, (30451), 22479 states have internal predecessors, (30451), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:16:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22876 states to 22876 states and 30979 transitions. [2021-11-06 14:16:00,334 INFO L78 Accepts]: Start accepts. Automaton has 22876 states and 30979 transitions. Word has length 153 [2021-11-06 14:16:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:00,334 INFO L470 AbstractCegarLoop]: Abstraction has 22876 states and 30979 transitions. [2021-11-06 14:16:00,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 22876 states and 30979 transitions. [2021-11-06 14:16:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-06 14:16:00,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:00,343 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:00,365 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 14:16:00,544 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,SelfDestructingSolverStorable31 [2021-11-06 14:16:00,544 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:00,544 INFO L85 PathProgramCache]: Analyzing trace with hash -716003991, now seen corresponding path program 2 times [2021-11-06 14:16:00,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:00,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6156404] [2021-11-06 14:16:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:00,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 50 proven. 36 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-06 14:16:00,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:00,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6156404] [2021-11-06 14:16:00,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6156404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:00,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91717788] [2021-11-06 14:16:00,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:16:00,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:00,657 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 14:16:00,659 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 14:16:03,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:16:03,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:16:03,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 14:16:03,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:16:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 50 proven. 36 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-06 14:16:03,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91717788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:03,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:16:03,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-06 14:16:03,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354635823] [2021-11-06 14:16:03,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:16:03,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:03,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:16:03,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:16:03,313 INFO L87 Difference]: Start difference. First operand 22876 states and 30979 transitions. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:05,618 INFO L93 Difference]: Finished difference Result 45895 states and 62151 transitions. [2021-11-06 14:16:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:16:05,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-06 14:16:05,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:05,659 INFO L225 Difference]: With dead ends: 45895 [2021-11-06 14:16:05,660 INFO L226 Difference]: Without dead ends: 23032 [2021-11-06 14:16:05,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 155 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 14:16:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23032 states. [2021-11-06 14:16:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23032 to 22980. [2021-11-06 14:16:07,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22980 states, 22539 states have (on average 1.3556502063090643) internal successors, (30555), 22583 states have internal predecessors, (30555), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:16:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22980 states to 22980 states and 31083 transitions. [2021-11-06 14:16:07,887 INFO L78 Accepts]: Start accepts. Automaton has 22980 states and 31083 transitions. Word has length 155 [2021-11-06 14:16:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:07,888 INFO L470 AbstractCegarLoop]: Abstraction has 22980 states and 31083 transitions. [2021-11-06 14:16:07,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:07,888 INFO L276 IsEmpty]: Start isEmpty. Operand 22980 states and 31083 transitions. [2021-11-06 14:16:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-06 14:16:07,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:07,898 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:07,921 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 14:16:08,098 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,SelfDestructingSolverStorable32 [2021-11-06 14:16:08,098 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:08,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:08,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1482681165, now seen corresponding path program 3 times [2021-11-06 14:16:08,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:08,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726014274] [2021-11-06 14:16:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:08,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 50 proven. 49 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-06 14:16:08,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:08,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726014274] [2021-11-06 14:16:08,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726014274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:08,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235338282] [2021-11-06 14:16:08,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:16:08,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:08,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:08,224 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 14:16:08,225 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 14:16:11,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 14:16:11,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:16:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1367 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:16:11,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:16:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-06 14:16:11,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235338282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:16:11,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:16:11,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-11-06 14:16:11,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484301338] [2021-11-06 14:16:11,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:16:11,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:11,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:16:11,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:16:11,943 INFO L87 Difference]: Start difference. First operand 22980 states and 31083 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:18,970 INFO L93 Difference]: Finished difference Result 67254 states and 89865 transitions. [2021-11-06 14:16:18,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:16:18,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-11-06 14:16:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:19,054 INFO L225 Difference]: With dead ends: 67254 [2021-11-06 14:16:19,055 INFO L226 Difference]: Without dead ends: 44287 [2021-11-06 14:16:19,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:16:19,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44287 states. [2021-11-06 14:16:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44287 to 23091. [2021-11-06 14:16:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23091 states, 22650 states have (on average 1.3539072847682119) internal successors, (30666), 22694 states have internal predecessors, (30666), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:16:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23091 states to 23091 states and 31194 transitions. [2021-11-06 14:16:21,491 INFO L78 Accepts]: Start accepts. Automaton has 23091 states and 31194 transitions. Word has length 157 [2021-11-06 14:16:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:21,492 INFO L470 AbstractCegarLoop]: Abstraction has 23091 states and 31194 transitions. [2021-11-06 14:16:21,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 23091 states and 31194 transitions. [2021-11-06 14:16:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-06 14:16:21,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:21,502 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:21,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-06 14:16:21,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:21,703 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:16:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash 214942788, now seen corresponding path program 1 times [2021-11-06 14:16:21,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:21,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606347905] [2021-11-06 14:16:21,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:21,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 50 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 14:16:21,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:21,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606347905] [2021-11-06 14:16:21,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606347905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:21,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494491672] [2021-11-06 14:16:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:21,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:21,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:21,833 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 14:16:21,835 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 14:16:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:22,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1940 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 14:16:22,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:16:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 50 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 14:16:22,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494491672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:22,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:16:22,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-06 14:16:22,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344542478] [2021-11-06 14:16:22,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:16:22,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:22,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:16:22,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:16:22,910 INFO L87 Difference]: Start difference. First operand 23091 states and 31194 transitions. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:25,369 INFO L93 Difference]: Finished difference Result 46325 states and 62581 transitions. [2021-11-06 14:16:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 14:16:25,370 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2021-11-06 14:16:25,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:25,420 INFO L225 Difference]: With dead ends: 46325 [2021-11-06 14:16:25,421 INFO L226 Difference]: Without dead ends: 23247 [2021-11-06 14:16:25,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 158 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 14:16:25,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23247 states. [2021-11-06 14:16:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23247 to 23195. [2021-11-06 14:16:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23195 states, 22754 states have (on average 1.3522897073042102) internal successors, (30770), 22798 states have internal predecessors, (30770), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:16:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23195 states to 23195 states and 31298 transitions. [2021-11-06 14:16:27,821 INFO L78 Accepts]: Start accepts. Automaton has 23195 states and 31298 transitions. Word has length 158 [2021-11-06 14:16:27,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:27,821 INFO L470 AbstractCegarLoop]: Abstraction has 23195 states and 31298 transitions. [2021-11-06 14:16:27,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:27,822 INFO L276 IsEmpty]: Start isEmpty. Operand 23195 states and 31298 transitions. [2021-11-06 14:16:27,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-06 14:16:27,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:27,832 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:27,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-06 14:16:28,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:28,033 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 14:16:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1525629080, now seen corresponding path program 2 times [2021-11-06 14:16:28,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:28,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131853560] [2021-11-06 14:16:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:28,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 50 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 14:16:28,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:28,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131853560] [2021-11-06 14:16:28,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131853560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:28,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67004602] [2021-11-06 14:16:28,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:16:28,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:28,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:28,180 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 14:16:28,203 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 14:16:30,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:16:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:16:30,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1946 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-06 14:16:30,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:16:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 50 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 14:16:30,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67004602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:30,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:16:30,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-06 14:16:30,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061762960] [2021-11-06 14:16:30,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 14:16:30,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:16:30,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 14:16:30,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:16:30,820 INFO L87 Difference]: Start difference. First operand 23195 states and 31298 transitions. Second operand has 12 states, 12 states have (on average 11.75) internal successors, (141), 12 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:16:33,235 INFO L93 Difference]: Finished difference Result 46533 states and 62789 transitions. [2021-11-06 14:16:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:16:33,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.75) internal successors, (141), 12 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-06 14:16:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:16:33,279 INFO L225 Difference]: With dead ends: 46533 [2021-11-06 14:16:33,279 INFO L226 Difference]: Without dead ends: 23351 [2021-11-06 14:16:33,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 160 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 14:16:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23351 states. [2021-11-06 14:16:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23351 to 23299. [2021-11-06 14:16:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23299 states, 22858 states have (on average 1.3506868492431534) internal successors, (30874), 22902 states have internal predecessors, (30874), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:16:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23299 states to 23299 states and 31402 transitions. [2021-11-06 14:16:35,671 INFO L78 Accepts]: Start accepts. Automaton has 23299 states and 31402 transitions. Word has length 160 [2021-11-06 14:16:35,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:16:35,672 INFO L470 AbstractCegarLoop]: Abstraction has 23299 states and 31402 transitions. [2021-11-06 14:16:35,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.75) internal successors, (141), 12 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:16:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 23299 states and 31402 transitions. [2021-11-06 14:16:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-06 14:16:35,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:16:35,683 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:16:35,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-06 14:16:35,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-06 14:16:35,884 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 14:16:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:16:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash 822051212, now seen corresponding path program 3 times [2021-11-06 14:16:35,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:16:35,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361680968] [2021-11-06 14:16:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:16:35,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:16:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:16:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-06 14:16:36,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:16:36,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361680968] [2021-11-06 14:16:36,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361680968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:16:36,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970731594] [2021-11-06 14:16:36,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:16:36,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:16:36,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:16:36,033 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 14:16:36,037 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 14:17:12,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-06 14:17:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:17:12,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1556 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-06 14:17:12,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:17:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-11-06 14:17:12,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970731594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:17:12,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:17:12,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2021-11-06 14:17:12,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976820883] [2021-11-06 14:17:12,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 14:17:12,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:17:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 14:17:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:17:12,481 INFO L87 Difference]: Start difference. First operand 23299 states and 31402 transitions. Second operand has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 14:17:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:20,389 INFO L93 Difference]: Finished difference Result 56334 states and 75753 transitions. [2021-11-06 14:17:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-06 14:17:20,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 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 162 [2021-11-06 14:17:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:20,467 INFO L225 Difference]: With dead ends: 56334 [2021-11-06 14:17:20,467 INFO L226 Difference]: Without dead ends: 33048 [2021-11-06 14:17:20,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-11-06 14:17:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33048 states. [2021-11-06 14:17:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33048 to 23514. [2021-11-06 14:17:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23514 states, 23073 states have (on average 1.3474190612404109) internal successors, (31089), 23117 states have internal predecessors, (31089), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:17:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23514 states to 23514 states and 31617 transitions. [2021-11-06 14:17:23,018 INFO L78 Accepts]: Start accepts. Automaton has 23514 states and 31617 transitions. Word has length 162 [2021-11-06 14:17:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:17:23,018 INFO L470 AbstractCegarLoop]: Abstraction has 23514 states and 31617 transitions. [2021-11-06 14:17:23,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.4) internal successors, (171), 15 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 14:17:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 23514 states and 31617 transitions. [2021-11-06 14:17:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-06 14:17:23,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:17:23,030 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:17:23,069 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 14:17:23,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-06 14:17:23,231 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 14:17:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:17:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1574116443, now seen corresponding path program 4 times [2021-11-06 14:17:23,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:17:23,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067010273] [2021-11-06 14:17:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:23,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:17:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 14:17:23,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:17:23,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067010273] [2021-11-06 14:17:23,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067010273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:17:23,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930687489] [2021-11-06 14:17:23,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:17:23,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:17:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:17:23,390 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 14:17:23,390 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 14:17:24,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:17:24,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:17:24,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1994 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 14:17:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:17:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 50 proven. 100 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 14:17:24,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930687489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:17:24,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:17:24,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-06 14:17:24,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600736142] [2021-11-06 14:17:24,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-06 14:17:24,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:17:24,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-06 14:17:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:17:24,661 INFO L87 Difference]: Start difference. First operand 23514 states and 31617 transitions. Second operand has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:17:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:27,244 INFO L93 Difference]: Finished difference Result 47171 states and 63427 transitions. [2021-11-06 14:17:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:17:27,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-06 14:17:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:27,289 INFO L225 Difference]: With dead ends: 47171 [2021-11-06 14:17:27,289 INFO L226 Difference]: Without dead ends: 23670 [2021-11-06 14:17:27,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:17:27,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23670 states. [2021-11-06 14:17:29,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23670 to 23618. [2021-11-06 14:17:29,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23618 states, 23177 states have (on average 1.3458601199464988) internal successors, (31193), 23221 states have internal predecessors, (31193), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:17:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23618 states to 23618 states and 31721 transitions. [2021-11-06 14:17:29,823 INFO L78 Accepts]: Start accepts. Automaton has 23618 states and 31721 transitions. Word has length 165 [2021-11-06 14:17:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:17:29,823 INFO L470 AbstractCegarLoop]: Abstraction has 23618 states and 31721 transitions. [2021-11-06 14:17:29,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:17:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 23618 states and 31721 transitions. [2021-11-06 14:17:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-06 14:17:29,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:17:29,837 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:17:29,863 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 14:17:30,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-06 14:17:30,059 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 14:17:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:17:30,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1029804609, now seen corresponding path program 5 times [2021-11-06 14:17:30,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:17:30,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870688232] [2021-11-06 14:17:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:30,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:17:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 50 proven. 121 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 14:17:30,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:17:30,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870688232] [2021-11-06 14:17:30,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870688232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:17:30,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287958205] [2021-11-06 14:17:30,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 14:17:30,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:17:30,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:17:30,227 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 14:17:30,229 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 14:17:31,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-06 14:17:31,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:17:31,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 14:17:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:17:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:17:31,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287958205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:17:31,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:17:31,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 16 [2021-11-06 14:17:31,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607156391] [2021-11-06 14:17:31,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:17:31,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:17:31,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:17:31,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:17:31,511 INFO L87 Difference]: Start difference. First operand 23618 states and 31721 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:17:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:36,569 INFO L93 Difference]: Finished difference Result 63218 states and 84735 transitions. [2021-11-06 14:17:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:17:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-11-06 14:17:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:36,637 INFO L225 Difference]: With dead ends: 63218 [2021-11-06 14:17:36,638 INFO L226 Difference]: Without dead ends: 39818 [2021-11-06 14:17:36,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:17:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39818 states. [2021-11-06 14:17:39,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39818 to 23684. [2021-11-06 14:17:39,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23684 states, 23243 states have (on average 1.3448780277933141) internal successors, (31259), 23287 states have internal predecessors, (31259), 264 states have call successors, (264), 176 states have call predecessors, (264), 176 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2021-11-06 14:17:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23684 states to 23684 states and 31787 transitions. [2021-11-06 14:17:39,273 INFO L78 Accepts]: Start accepts. Automaton has 23684 states and 31787 transitions. Word has length 167 [2021-11-06 14:17:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:17:39,273 INFO L470 AbstractCegarLoop]: Abstraction has 23684 states and 31787 transitions. [2021-11-06 14:17:39,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:17:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 23684 states and 31787 transitions. [2021-11-06 14:17:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-06 14:17:39,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:17:39,285 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:17:39,309 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 14:17:39,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:17:39,496 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 14:17:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:17:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1061145618, now seen corresponding path program 1 times [2021-11-06 14:17:39,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:17:39,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104531137] [2021-11-06 14:17:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:39,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:17:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:17:39,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:17:39,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104531137] [2021-11-06 14:17:39,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104531137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:17:39,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:17:39,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:17:39,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3233551] [2021-11-06 14:17:39,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:17:39,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:17:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:17:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:17:39,560 INFO L87 Difference]: Start difference. First operand 23684 states and 31787 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:17:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:44,067 INFO L93 Difference]: Finished difference Result 61123 states and 81265 transitions. [2021-11-06 14:17:44,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:17:44,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-06 14:17:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:44,142 INFO L225 Difference]: With dead ends: 61123 [2021-11-06 14:17:44,142 INFO L226 Difference]: Without dead ends: 37657 [2021-11-06 14:17:44,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 14:17:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37657 states. [2021-11-06 14:17:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37657 to 23398. [2021-11-06 14:17:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23398 states, 22946 states have (on average 1.3373572735988843) internal successors, (30687), 22990 states have internal predecessors, (30687), 275 states have call successors, (275), 176 states have call predecessors, (275), 176 states have return successors, (275), 275 states have call predecessors, (275), 275 states have call successors, (275) [2021-11-06 14:17:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23398 states to 23398 states and 31237 transitions. [2021-11-06 14:17:46,988 INFO L78 Accepts]: Start accepts. Automaton has 23398 states and 31237 transitions. Word has length 174 [2021-11-06 14:17:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:17:46,988 INFO L470 AbstractCegarLoop]: Abstraction has 23398 states and 31237 transitions. [2021-11-06 14:17:46,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:17:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 23398 states and 31237 transitions. [2021-11-06 14:17:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-06 14:17:47,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:17:47,003 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:17:47,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-06 14:17:47,008 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 14:17:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:17:47,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2129336936, now seen corresponding path program 1 times [2021-11-06 14:17:47,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:17:47,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008032694] [2021-11-06 14:17:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:47,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:17:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 50 proven. 121 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 14:17:47,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:17:47,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008032694] [2021-11-06 14:17:47,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008032694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:17:47,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232623775] [2021-11-06 14:17:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:47,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:17:47,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:17:47,191 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 14:17:47,193 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 14:17:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:48,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:17:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:17:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:17:48,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232623775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:17:48,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:17:48,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2021-11-06 14:17:48,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861373095] [2021-11-06 14:17:48,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:17:48,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:17:48,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:17:48,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:17:48,555 INFO L87 Difference]: Start difference. First operand 23398 states and 31237 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 14:17:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:17:56,170 INFO L93 Difference]: Finished difference Result 81568 states and 107805 transitions. [2021-11-06 14:17:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:17:56,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 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 183 [2021-11-06 14:17:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:17:56,283 INFO L225 Difference]: With dead ends: 81568 [2021-11-06 14:17:56,283 INFO L226 Difference]: Without dead ends: 58388 [2021-11-06 14:17:56,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:17:56,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58388 states. [2021-11-06 14:17:59,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58388 to 23508. [2021-11-06 14:17:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23508 states, 23056 states have (on average 1.3367019430950728) internal successors, (30819), 23100 states have internal predecessors, (30819), 275 states have call successors, (275), 176 states have call predecessors, (275), 176 states have return successors, (275), 275 states have call predecessors, (275), 275 states have call successors, (275) [2021-11-06 14:17:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23508 states to 23508 states and 31369 transitions. [2021-11-06 14:17:59,381 INFO L78 Accepts]: Start accepts. Automaton has 23508 states and 31369 transitions. Word has length 183 [2021-11-06 14:17:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:17:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 23508 states and 31369 transitions. [2021-11-06 14:17:59,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 14:17:59,382 INFO L276 IsEmpty]: Start isEmpty. Operand 23508 states and 31369 transitions. [2021-11-06 14:17:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-06 14:17:59,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:17:59,396 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:17:59,422 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 14:17:59,596 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,SelfDestructingSolverStorable40 [2021-11-06 14:17:59,597 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 14:17:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:17:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1927035078, now seen corresponding path program 1 times [2021-11-06 14:17:59,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:17:59,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871385963] [2021-11-06 14:17:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:59,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:17:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:17:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 50 proven. 121 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-06 14:17:59,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:17:59,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871385963] [2021-11-06 14:17:59,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871385963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:17:59,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614129781] [2021-11-06 14:17:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:17:59,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:17:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:17:59,771 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 14:17:59,772 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 14:18:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:00,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:18:00,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:18:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:18:01,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614129781] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:18:01,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:18:01,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 19 [2021-11-06 14:18:01,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133827742] [2021-11-06 14:18:01,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:18:01,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:18:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:18:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:18:01,181 INFO L87 Difference]: Start difference. First operand 23508 states and 31369 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:18:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:18:08,016 INFO L93 Difference]: Finished difference Result 65290 states and 87166 transitions. [2021-11-06 14:18:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 14:18:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-06 14:18:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:18:08,100 INFO L225 Difference]: With dead ends: 65290 [2021-11-06 14:18:08,100 INFO L226 Difference]: Without dead ends: 42000 [2021-11-06 14:18:08,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2021-11-06 14:18:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42000 states. [2021-11-06 14:18:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42000 to 23574. [2021-11-06 14:18:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23574 states, 23122 states have (on average 1.3366923276533171) internal successors, (30907), 23166 states have internal predecessors, (30907), 275 states have call successors, (275), 176 states have call predecessors, (275), 176 states have return successors, (275), 275 states have call predecessors, (275), 275 states have call successors, (275) [2021-11-06 14:18:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23574 states to 23574 states and 31457 transitions. [2021-11-06 14:18:11,173 INFO L78 Accepts]: Start accepts. Automaton has 23574 states and 31457 transitions. Word has length 184 [2021-11-06 14:18:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:18:11,173 INFO L470 AbstractCegarLoop]: Abstraction has 23574 states and 31457 transitions. [2021-11-06 14:18:11,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:18:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 23574 states and 31457 transitions. [2021-11-06 14:18:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-06 14:18:11,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:18:11,191 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:18:11,216 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 14:18:11,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:18:11,391 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 14:18:11,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:18:11,392 INFO L85 PathProgramCache]: Analyzing trace with hash -817779339, now seen corresponding path program 1 times [2021-11-06 14:18:11,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:18:11,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284844747] [2021-11-06 14:18:11,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:11,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:18:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:11,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:18:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:18:11,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:18:11,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284844747] [2021-11-06 14:18:11,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284844747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:18:11,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:18:11,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-06 14:18:11,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995216224] [2021-11-06 14:18:11,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:18:11,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:18:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:18:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:18:11,510 INFO L87 Difference]: Start difference. First operand 23574 states and 31457 transitions. Second operand has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 7 states have internal predecessors, (163), 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 14:18:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:18:27,904 INFO L93 Difference]: Finished difference Result 94712 states and 125298 transitions. [2021-11-06 14:18:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:18:27,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 7 states have internal predecessors, (163), 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 208 [2021-11-06 14:18:27,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:18:28,068 INFO L225 Difference]: With dead ends: 94712 [2021-11-06 14:18:28,068 INFO L226 Difference]: Without dead ends: 71356 [2021-11-06 14:18:28,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:18:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71356 states. [2021-11-06 14:18:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71356 to 23673. [2021-11-06 14:18:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23673 states, 23210 states have (on average 1.335415769065058) internal successors, (30995), 23243 states have internal predecessors, (30995), 275 states have call successors, (275), 176 states have call predecessors, (275), 187 states have return successors, (308), 297 states have call predecessors, (308), 275 states have call successors, (308) [2021-11-06 14:18:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23673 states to 23673 states and 31578 transitions. [2021-11-06 14:18:31,637 INFO L78 Accepts]: Start accepts. Automaton has 23673 states and 31578 transitions. Word has length 208 [2021-11-06 14:18:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:18:31,638 INFO L470 AbstractCegarLoop]: Abstraction has 23673 states and 31578 transitions. [2021-11-06 14:18:31,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 7 states have internal predecessors, (163), 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 14:18:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 23673 states and 31578 transitions. [2021-11-06 14:18:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-06 14:18:31,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:18:31,656 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:18:31,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-06 14:18:31,656 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 14:18:31,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:18:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash -698594793, now seen corresponding path program 1 times [2021-11-06 14:18:31,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:18:31,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268462130] [2021-11-06 14:18:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:31,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:18:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:31,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:18:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:18:31,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:18:31,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268462130] [2021-11-06 14:18:31,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268462130] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:18:31,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:18:31,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-06 14:18:31,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073121518] [2021-11-06 14:18:31,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:18:31,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:18:31,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:18:31,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:18:31,798 INFO L87 Difference]: Start difference. First operand 23673 states and 31578 transitions. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 9 states have internal predecessors, (163), 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 14:18:51,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:18:51,183 INFO L93 Difference]: Finished difference Result 100493 states and 132701 transitions. [2021-11-06 14:18:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-06 14:18:51,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 9 states have internal predecessors, (163), 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 208 [2021-11-06 14:18:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:18:51,350 INFO L225 Difference]: With dead ends: 100493 [2021-11-06 14:18:51,350 INFO L226 Difference]: Without dead ends: 77038 [2021-11-06 14:18:51,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:18:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77038 states. [2021-11-06 14:18:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77038 to 23827. [2021-11-06 14:18:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23827 states, 23364 states have (on average 1.3350881698339325) internal successors, (31193), 23397 states have internal predecessors, (31193), 275 states have call successors, (275), 176 states have call predecessors, (275), 187 states have return successors, (308), 297 states have call predecessors, (308), 275 states have call successors, (308) [2021-11-06 14:18:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23827 states to 23827 states and 31776 transitions. [2021-11-06 14:18:55,138 INFO L78 Accepts]: Start accepts. Automaton has 23827 states and 31776 transitions. Word has length 208 [2021-11-06 14:18:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:18:55,138 INFO L470 AbstractCegarLoop]: Abstraction has 23827 states and 31776 transitions. [2021-11-06 14:18:55,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 9 states have internal predecessors, (163), 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 14:18:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 23827 states and 31776 transitions. [2021-11-06 14:18:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-06 14:18:55,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:18:55,160 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:18:55,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-06 14:18:55,160 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 14:18:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:18:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 160497399, now seen corresponding path program 1 times [2021-11-06 14:18:55,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:18:55,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813242265] [2021-11-06 14:18:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:18:55,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:18:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:55,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:18:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:18:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:18:55,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:18:55,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813242265] [2021-11-06 14:18:55,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813242265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:18:55,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:18:55,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 14:18:55,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833654877] [2021-11-06 14:18:55,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:18:55,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:18:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:18:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:18:55,285 INFO L87 Difference]: Start difference. First operand 23827 states and 31776 transitions. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 7 states have internal predecessors, (164), 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 14:19:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:19:13,579 INFO L93 Difference]: Finished difference Result 66397 states and 88894 transitions. [2021-11-06 14:19:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-06 14:19:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 7 states have internal predecessors, (164), 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 209 [2021-11-06 14:19:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:19:13,680 INFO L225 Difference]: With dead ends: 66397 [2021-11-06 14:19:13,681 INFO L226 Difference]: Without dead ends: 42788 [2021-11-06 14:19:13,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:19:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42788 states. [2021-11-06 14:19:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42788 to 23519. [2021-11-06 14:19:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23519 states, 23056 states have (on average 1.3357477446217905) internal successors, (30797), 23089 states have internal predecessors, (30797), 275 states have call successors, (275), 176 states have call predecessors, (275), 187 states have return successors, (308), 297 states have call predecessors, (308), 275 states have call successors, (308) [2021-11-06 14:19:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23519 states to 23519 states and 31380 transitions. [2021-11-06 14:19:17,521 INFO L78 Accepts]: Start accepts. Automaton has 23519 states and 31380 transitions. Word has length 209 [2021-11-06 14:19:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:19:17,522 INFO L470 AbstractCegarLoop]: Abstraction has 23519 states and 31380 transitions. [2021-11-06 14:19:17,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 7 states have internal predecessors, (164), 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 14:19:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23519 states and 31380 transitions. [2021-11-06 14:19:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-06 14:19:17,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:19:17,542 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:19:17,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-06 14:19:17,542 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 14:19:17,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:19:17,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1731242050, now seen corresponding path program 1 times [2021-11-06 14:19:17,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:19:17,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522602430] [2021-11-06 14:19:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:19:17,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:19:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:17,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:19:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:19:17,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:19:17,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522602430] [2021-11-06 14:19:17,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522602430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:19:17,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862869520] [2021-11-06 14:19:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:19:17,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:19:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:19:17,645 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 14:19:17,645 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 14:19:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:19:18,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:19:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-06 14:19:19,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862869520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:19:19,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:19:19,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-06 14:19:19,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899832083] [2021-11-06 14:19:19,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:19:19,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:19:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:19:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:19:19,084 INFO L87 Difference]: Start difference. First operand 23519 states and 31380 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 14:19:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:19:25,943 INFO L93 Difference]: Finished difference Result 62476 states and 82970 transitions. [2021-11-06 14:19:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:19:25,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 209 [2021-11-06 14:19:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:19:26,033 INFO L225 Difference]: With dead ends: 62476 [2021-11-06 14:19:26,033 INFO L226 Difference]: Without dead ends: 39175 [2021-11-06 14:19:26,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 210 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 14:19:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39175 states. [2021-11-06 14:19:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39175 to 23541. [2021-11-06 14:19:29,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23541 states, 23078 states have (on average 1.3344743911950776) internal successors, (30797), 23111 states have internal predecessors, (30797), 275 states have call successors, (275), 176 states have call predecessors, (275), 187 states have return successors, (308), 297 states have call predecessors, (308), 275 states have call successors, (308) [2021-11-06 14:19:29,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23541 states to 23541 states and 31380 transitions. [2021-11-06 14:19:29,930 INFO L78 Accepts]: Start accepts. Automaton has 23541 states and 31380 transitions. Word has length 209 [2021-11-06 14:19:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:19:29,930 INFO L470 AbstractCegarLoop]: Abstraction has 23541 states and 31380 transitions. [2021-11-06 14:19:29,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 14:19:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23541 states and 31380 transitions. [2021-11-06 14:19:29,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-06 14:19:29,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:19:29,953 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:19:29,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-06 14:19:30,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:19:30,156 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 14:19:30,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:19:30,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1048779543, now seen corresponding path program 1 times [2021-11-06 14:19:30,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:19:30,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873068823] [2021-11-06 14:19:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:19:30,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:19:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:30,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:19:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-06 14:19:30,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:19:30,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873068823] [2021-11-06 14:19:30,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873068823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:19:30,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046157537] [2021-11-06 14:19:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:19:30,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:19:30,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:19:30,276 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 14:19:30,277 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 14:19:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 2890 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:19:31,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:19:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-06 14:19:31,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046157537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:19:31,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:19:31,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-11-06 14:19:31,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919410149] [2021-11-06 14:19:31,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:19:31,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:19:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:19:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:19:31,918 INFO L87 Difference]: Start difference. First operand 23541 states and 31380 transitions. Second operand has 6 states, 6 states have (on average 38.166666666666664) internal successors, (229), 5 states have internal predecessors, (229), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-06 14:19:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:19:45,663 INFO L93 Difference]: Finished difference Result 68123 states and 90448 transitions. [2021-11-06 14:19:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:19:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.166666666666664) internal successors, (229), 5 states have internal predecessors, (229), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 247 [2021-11-06 14:19:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:19:45,753 INFO L225 Difference]: With dead ends: 68123 [2021-11-06 14:19:45,754 INFO L226 Difference]: Without dead ends: 44800 [2021-11-06 14:19:45,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 248 SyntacticMatches, 0 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 14:19:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44800 states. [2021-11-06 14:19:49,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44800 to 24201. [2021-11-06 14:19:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24201 states, 23727 states have (on average 1.331352467652885) internal successors, (31589), 23749 states have internal predecessors, (31589), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:19:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24201 states to 24201 states and 32205 transitions. [2021-11-06 14:19:49,510 INFO L78 Accepts]: Start accepts. Automaton has 24201 states and 32205 transitions. Word has length 247 [2021-11-06 14:19:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:19:49,510 INFO L470 AbstractCegarLoop]: Abstraction has 24201 states and 32205 transitions. [2021-11-06 14:19:49,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.166666666666664) internal successors, (229), 5 states have internal predecessors, (229), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-06 14:19:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 24201 states and 32205 transitions. [2021-11-06 14:19:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-06 14:19:49,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:19:49,529 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:19:49,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-06 14:19:49,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:19:49,754 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:19:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:19:49,754 INFO L85 PathProgramCache]: Analyzing trace with hash 275071403, now seen corresponding path program 1 times [2021-11-06 14:19:49,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:19:49,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457848204] [2021-11-06 14:19:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:19:49,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:19:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:49,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:19:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:19:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-06 14:19:49,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:19:49,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457848204] [2021-11-06 14:19:49,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457848204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:19:49,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:19:49,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 14:19:49,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843627868] [2021-11-06 14:19:49,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:19:49,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:19:49,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:19:49,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:19:49,900 INFO L87 Difference]: Start difference. First operand 24201 states and 32205 transitions. Second operand has 7 states, 7 states have (on average 29.0) internal successors, (203), 6 states have internal predecessors, (203), 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 14:20:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:20:18,502 INFO L93 Difference]: Finished difference Result 83891 states and 110411 transitions. [2021-11-06 14:20:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:20:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 6 states have internal predecessors, (203), 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 256 [2021-11-06 14:20:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:20:18,609 INFO L225 Difference]: With dead ends: 83891 [2021-11-06 14:20:18,609 INFO L226 Difference]: Without dead ends: 59908 [2021-11-06 14:20:18,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-06 14:20:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59908 states. [2021-11-06 14:20:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59908 to 24311. [2021-11-06 14:20:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24311 states, 23837 states have (on average 1.3298233838150775) internal successors, (31699), 23859 states have internal predecessors, (31699), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:20:22,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24311 states to 24311 states and 32315 transitions. [2021-11-06 14:20:22,865 INFO L78 Accepts]: Start accepts. Automaton has 24311 states and 32315 transitions. Word has length 256 [2021-11-06 14:20:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:20:22,865 INFO L470 AbstractCegarLoop]: Abstraction has 24311 states and 32315 transitions. [2021-11-06 14:20:22,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 6 states have internal predecessors, (203), 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 14:20:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 24311 states and 32315 transitions. [2021-11-06 14:20:22,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-06 14:20:22,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:20:22,884 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:22,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-06 14:20:22,885 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:20:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:20:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash 679168963, now seen corresponding path program 1 times [2021-11-06 14:20:22,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:20:22,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362839586] [2021-11-06 14:20:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:20:22,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:20:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:23,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:20:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-06 14:20:23,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:20:23,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362839586] [2021-11-06 14:20:23,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362839586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:20:23,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:20:23,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:20:23,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922470031] [2021-11-06 14:20:23,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:20:23,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:20:23,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:20:23,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:20:23,010 INFO L87 Difference]: Start difference. First operand 24311 states and 32315 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 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 14:20:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:20:30,220 INFO L93 Difference]: Finished difference Result 49853 states and 66509 transitions. [2021-11-06 14:20:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:20:30,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 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 271 [2021-11-06 14:20:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:20:30,273 INFO L225 Difference]: With dead ends: 49853 [2021-11-06 14:20:30,273 INFO L226 Difference]: Without dead ends: 25555 [2021-11-06 14:20:30,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:20:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25555 states. [2021-11-06 14:20:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25555 to 24411. [2021-11-06 14:20:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24411 states, 23937 states have (on average 1.328445502778126) internal successors, (31799), 23959 states have internal predecessors, (31799), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:20:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24411 states to 24411 states and 32415 transitions. [2021-11-06 14:20:34,253 INFO L78 Accepts]: Start accepts. Automaton has 24411 states and 32415 transitions. Word has length 271 [2021-11-06 14:20:34,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:20:34,254 INFO L470 AbstractCegarLoop]: Abstraction has 24411 states and 32415 transitions. [2021-11-06 14:20:34,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 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 14:20:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 24411 states and 32415 transitions. [2021-11-06 14:20:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-06 14:20:34,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:20:34,271 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:34,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-06 14:20:34,272 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:20:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:20:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 134296389, now seen corresponding path program 1 times [2021-11-06 14:20:34,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:20:34,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662615973] [2021-11-06 14:20:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:20:34,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:20:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:20:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-06 14:20:34,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:20:34,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662615973] [2021-11-06 14:20:34,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662615973] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:20:34,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:20:34,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:20:34,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332125277] [2021-11-06 14:20:34,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:20:34,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:20:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:20:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:20:34,400 INFO L87 Difference]: Start difference. First operand 24411 states and 32415 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 4 states have internal predecessors, (218), 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 14:20:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:20:46,298 INFO L93 Difference]: Finished difference Result 50953 states and 68009 transitions. [2021-11-06 14:20:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:20:46,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 4 states have internal predecessors, (218), 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 271 [2021-11-06 14:20:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:20:46,361 INFO L225 Difference]: With dead ends: 50953 [2021-11-06 14:20:46,361 INFO L226 Difference]: Without dead ends: 26555 [2021-11-06 14:20:46,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:20:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26555 states. [2021-11-06 14:20:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26555 to 24611. [2021-11-06 14:20:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24611 states, 24137 states have (on average 1.3257239922111281) internal successors, (31999), 24159 states have internal predecessors, (31999), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:20:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24611 states to 24611 states and 32615 transitions. [2021-11-06 14:20:50,562 INFO L78 Accepts]: Start accepts. Automaton has 24611 states and 32615 transitions. Word has length 271 [2021-11-06 14:20:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:20:50,562 INFO L470 AbstractCegarLoop]: Abstraction has 24611 states and 32615 transitions. [2021-11-06 14:20:50,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 4 states have internal predecessors, (218), 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 14:20:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24611 states and 32615 transitions. [2021-11-06 14:20:50,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-06 14:20:50,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:20:50,584 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:20:50,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-11-06 14:20:50,584 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:20:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:20:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -229170109, now seen corresponding path program 1 times [2021-11-06 14:20:50,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:20:50,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709577897] [2021-11-06 14:20:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:20:50,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:20:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:50,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:20:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:20:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-06 14:20:50,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:20:50,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709577897] [2021-11-06 14:20:50,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709577897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:20:50,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:20:50,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:20:50,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023756117] [2021-11-06 14:20:50,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:20:50,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:20:50,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:20:50,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:20:50,739 INFO L87 Difference]: Start difference. First operand 24611 states and 32615 transitions. Second operand has 5 states, 5 states have (on average 43.6) internal successors, (218), 4 states have internal predecessors, (218), 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 14:21:00,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:21:00,832 INFO L93 Difference]: Finished difference Result 50653 states and 67309 transitions. [2021-11-06 14:21:00,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:21:00,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 4 states have internal predecessors, (218), 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 271 [2021-11-06 14:21:00,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:21:00,894 INFO L225 Difference]: With dead ends: 50653 [2021-11-06 14:21:00,894 INFO L226 Difference]: Without dead ends: 26055 [2021-11-06 14:21:00,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:21:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26055 states. [2021-11-06 14:21:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26055 to 24811. [2021-11-06 14:21:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24811 states, 24337 states have (on average 1.3230472120639356) internal successors, (32199), 24359 states have internal predecessors, (32199), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:21:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24811 states to 24811 states and 32815 transitions. [2021-11-06 14:21:04,925 INFO L78 Accepts]: Start accepts. Automaton has 24811 states and 32815 transitions. Word has length 271 [2021-11-06 14:21:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:21:04,926 INFO L470 AbstractCegarLoop]: Abstraction has 24811 states and 32815 transitions. [2021-11-06 14:21:04,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.6) internal successors, (218), 4 states have internal predecessors, (218), 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 14:21:04,926 INFO L276 IsEmpty]: Start isEmpty. Operand 24811 states and 32815 transitions. [2021-11-06 14:21:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-06 14:21:04,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:21:04,952 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:04,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-11-06 14:21:04,953 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:21:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:21:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1533249991, now seen corresponding path program 1 times [2021-11-06 14:21:04,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:21:04,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728986464] [2021-11-06 14:21:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:21:04,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:21:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:21:05,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:21:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:21:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 50 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-06 14:21:05,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:21:05,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728986464] [2021-11-06 14:21:05,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728986464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:21:05,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545291479] [2021-11-06 14:21:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:21:05,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:21:05,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:21:05,230 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 14:21:05,231 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 14:21:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:21:06,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 3101 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 14:21:06,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:21:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 50 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-06 14:21:07,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545291479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:21:07,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:21:07,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-11-06 14:21:07,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567339259] [2021-11-06 14:21:07,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 14:21:07,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:21:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 14:21:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:21:07,164 INFO L87 Difference]: Start difference. First operand 24811 states and 32815 transitions. Second operand has 16 states, 16 states have (on average 15.125) internal successors, (242), 15 states have internal predecessors, (242), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:21:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:21:15,328 INFO L93 Difference]: Finished difference Result 50909 states and 67517 transitions. [2021-11-06 14:21:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 14:21:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.125) internal successors, (242), 15 states have internal predecessors, (242), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2021-11-06 14:21:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:21:15,390 INFO L225 Difference]: With dead ends: 50909 [2021-11-06 14:21:15,390 INFO L226 Difference]: Without dead ends: 26111 [2021-11-06 14:21:15,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:21:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26111 states. [2021-11-06 14:21:19,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26111 to 24915. [2021-11-06 14:21:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24915 states, 24441 states have (on average 1.3216725993208134) internal successors, (32303), 24463 states have internal predecessors, (32303), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:21:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24915 states to 24915 states and 32919 transitions. [2021-11-06 14:21:19,533 INFO L78 Accepts]: Start accepts. Automaton has 24915 states and 32919 transitions. Word has length 271 [2021-11-06 14:21:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:21:19,534 INFO L470 AbstractCegarLoop]: Abstraction has 24915 states and 32919 transitions. [2021-11-06 14:21:19,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.125) internal successors, (242), 15 states have internal predecessors, (242), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:21:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 24915 states and 32919 transitions. [2021-11-06 14:21:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-06 14:21:19,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:21:19,558 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:19,584 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 14:21:19,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:21:19,759 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:21:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:21:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1647759317, now seen corresponding path program 2 times [2021-11-06 14:21:19,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:21:19,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37629386] [2021-11-06 14:21:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:21:19,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:21:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:21:20,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:21:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:21:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 50 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-06 14:21:20,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:21:20,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37629386] [2021-11-06 14:21:20,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37629386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:21:20,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890073672] [2021-11-06 14:21:20,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:21:20,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:21:20,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:21:20,034 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 14:21:20,035 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 14:21:23,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:21:23,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:21:23,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 14:21:23,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:21:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 50 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-06 14:21:23,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890073672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:21:23,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:21:23,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-11-06 14:21:23,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341185182] [2021-11-06 14:21:23,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 14:21:23,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:21:23,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 14:21:23,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:21:23,808 INFO L87 Difference]: Start difference. First operand 24915 states and 32919 transitions. Second operand has 17 states, 17 states have (on average 14.352941176470589) internal successors, (244), 16 states have internal predecessors, (244), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:21:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:21:33,372 INFO L93 Difference]: Finished difference Result 51117 states and 67725 transitions. [2021-11-06 14:21:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 14:21:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 14.352941176470589) internal successors, (244), 16 states have internal predecessors, (244), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2021-11-06 14:21:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:21:33,425 INFO L225 Difference]: With dead ends: 51117 [2021-11-06 14:21:33,425 INFO L226 Difference]: Without dead ends: 26215 [2021-11-06 14:21:33,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:21:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26215 states. [2021-11-06 14:21:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26215 to 25019. [2021-11-06 14:21:37,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25019 states, 24545 states have (on average 1.320309635363618) internal successors, (32407), 24567 states have internal predecessors, (32407), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:21:37,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25019 states to 25019 states and 33023 transitions. [2021-11-06 14:21:37,658 INFO L78 Accepts]: Start accepts. Automaton has 25019 states and 33023 transitions. Word has length 273 [2021-11-06 14:21:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:21:37,659 INFO L470 AbstractCegarLoop]: Abstraction has 25019 states and 33023 transitions. [2021-11-06 14:21:37,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.352941176470589) internal successors, (244), 16 states have internal predecessors, (244), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:21:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 25019 states and 33023 transitions. [2021-11-06 14:21:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-06 14:21:37,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:21:37,688 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:21:37,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-06 14:21:37,888 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,SelfDestructingSolverStorable52 [2021-11-06 14:21:37,889 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:21:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:21:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash -580989553, now seen corresponding path program 3 times [2021-11-06 14:21:37,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:21:37,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681112227] [2021-11-06 14:21:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:21:37,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:21:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:21:38,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:21:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:21:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 50 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-06 14:21:38,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:21:38,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681112227] [2021-11-06 14:21:38,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681112227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:21:38,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912044378] [2021-11-06 14:21:38,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:21:38,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:21:38,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:21:38,232 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 14:21:38,233 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 14:22:06,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-06 14:22:06,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:22:06,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:22:06,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:22:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-06 14:22:07,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912044378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:22:07,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:22:07,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2021-11-06 14:22:07,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174459512] [2021-11-06 14:22:07,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-06 14:22:07,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:22:07,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-06 14:22:07,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-11-06 14:22:07,042 INFO L87 Difference]: Start difference. First operand 25019 states and 33023 transitions. Second operand has 21 states, 21 states have (on average 13.095238095238095) internal successors, (275), 20 states have internal predecessors, (275), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:22:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:22:22,980 INFO L93 Difference]: Finished difference Result 57164 states and 75589 transitions. [2021-11-06 14:22:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-06 14:22:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 13.095238095238095) internal successors, (275), 20 states have internal predecessors, (275), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2021-11-06 14:22:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:22:23,059 INFO L225 Difference]: With dead ends: 57164 [2021-11-06 14:22:23,060 INFO L226 Difference]: Without dead ends: 32158 [2021-11-06 14:22:23,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2021-11-06 14:22:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32158 states. [2021-11-06 14:22:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32158 to 25223. [2021-11-06 14:22:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25223 states, 24749 states have (on average 1.31766940078387) internal successors, (32611), 24771 states have internal predecessors, (32611), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:22:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25223 states to 25223 states and 33227 transitions. [2021-11-06 14:22:27,579 INFO L78 Accepts]: Start accepts. Automaton has 25223 states and 33227 transitions. Word has length 275 [2021-11-06 14:22:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:22:27,579 INFO L470 AbstractCegarLoop]: Abstraction has 25223 states and 33227 transitions. [2021-11-06 14:22:27,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.095238095238095) internal successors, (275), 20 states have internal predecessors, (275), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:22:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 25223 states and 33227 transitions. [2021-11-06 14:22:27,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-06 14:22:27,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:22:27,598 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:27,634 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 14:22:27,798 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,SelfDestructingSolverStorable53 [2021-11-06 14:22:27,799 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:22:27,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:22:27,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1755427172, now seen corresponding path program 1 times [2021-11-06 14:22:27,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:22:27,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210359389] [2021-11-06 14:22:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:22:27,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:22:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:22:27,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-06 14:22:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:22:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:22:27,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:22:27,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210359389] [2021-11-06 14:22:27,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210359389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:22:27,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684595155] [2021-11-06 14:22:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:22:27,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:22:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:22:27,969 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 14:22:27,971 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 14:22:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:22:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 3165 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 14:22:29,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:22:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:22:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684595155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:22:29,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:22:29,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-11-06 14:22:29,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60553240] [2021-11-06 14:22:29,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:22:29,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:22:29,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:22:29,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:22:29,926 INFO L87 Difference]: Start difference. First operand 25223 states and 33227 transitions. Second operand has 8 states, 8 states have (on average 29.875) internal successors, (239), 7 states have internal predecessors, (239), 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 14:22:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:22:38,484 INFO L93 Difference]: Finished difference Result 51712 states and 68313 transitions. [2021-11-06 14:22:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:22:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.875) internal successors, (239), 7 states have internal predecessors, (239), 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 277 [2021-11-06 14:22:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:22:38,540 INFO L225 Difference]: With dead ends: 51712 [2021-11-06 14:22:38,540 INFO L226 Difference]: Without dead ends: 26502 [2021-11-06 14:22:38,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:22:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26502 states. [2021-11-06 14:22:42,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26502 to 25313. [2021-11-06 14:22:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25313 states, 24839 states have (on average 1.3165183783566166) internal successors, (32701), 24861 states have internal predecessors, (32701), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:22:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25313 states to 25313 states and 33317 transitions. [2021-11-06 14:22:42,695 INFO L78 Accepts]: Start accepts. Automaton has 25313 states and 33317 transitions. Word has length 277 [2021-11-06 14:22:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:22:42,696 INFO L470 AbstractCegarLoop]: Abstraction has 25313 states and 33317 transitions. [2021-11-06 14:22:42,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.875) internal successors, (239), 7 states have internal predecessors, (239), 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 14:22:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 25313 states and 33317 transitions. [2021-11-06 14:22:42,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-06 14:22:42,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:22:42,714 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:42,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-06 14:22:42,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:22:42,922 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:22:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:22:42,922 INFO L85 PathProgramCache]: Analyzing trace with hash -587886720, now seen corresponding path program 2 times [2021-11-06 14:22:42,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:22:42,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636353462] [2021-11-06 14:22:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:22:42,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:22:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:22:43,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-06 14:22:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:22:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:22:43,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:22:43,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636353462] [2021-11-06 14:22:43,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636353462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:22:43,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274723331] [2021-11-06 14:22:43,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:22:43,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:22:43,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:22:43,088 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 14:22:43,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-06 14:22:46,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:22:46,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:22:46,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 14:22:46,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:22:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:22:46,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274723331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:22:46,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:22:46,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-11-06 14:22:46,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927523064] [2021-11-06 14:22:46,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:22:46,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:22:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:22:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:22:46,472 INFO L87 Difference]: Start difference. First operand 25313 states and 33317 transitions. Second operand has 9 states, 9 states have (on average 26.77777777777778) internal successors, (241), 8 states have internal predecessors, (241), 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 14:22:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:22:54,339 INFO L93 Difference]: Finished difference Result 51892 states and 68493 transitions. [2021-11-06 14:22:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 14:22:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 26.77777777777778) internal successors, (241), 8 states have internal predecessors, (241), 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 279 [2021-11-06 14:22:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:22:54,393 INFO L225 Difference]: With dead ends: 51892 [2021-11-06 14:22:54,393 INFO L226 Difference]: Without dead ends: 26592 [2021-11-06 14:22:54,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:22:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26592 states. [2021-11-06 14:22:58,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26592 to 25403. [2021-11-06 14:22:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25403 states, 24929 states have (on average 1.315375666893979) internal successors, (32791), 24951 states have internal predecessors, (32791), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:22:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25403 states to 25403 states and 33407 transitions. [2021-11-06 14:22:58,703 INFO L78 Accepts]: Start accepts. Automaton has 25403 states and 33407 transitions. Word has length 279 [2021-11-06 14:22:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:22:58,703 INFO L470 AbstractCegarLoop]: Abstraction has 25403 states and 33407 transitions. [2021-11-06 14:22:58,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.77777777777778) internal successors, (241), 8 states have internal predecessors, (241), 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 14:22:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25403 states and 33407 transitions. [2021-11-06 14:22:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-11-06 14:22:58,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:22:58,723 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:22:58,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-06 14:22:58,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:22:58,928 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:22:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:22:58,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1585787396, now seen corresponding path program 4 times [2021-11-06 14:22:58,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:22:58,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895854269] [2021-11-06 14:22:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:22:58,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:22:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:22:59,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:22:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:22:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 50 proven. 196 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-06 14:22:59,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:22:59,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895854269] [2021-11-06 14:22:59,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895854269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:22:59,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939282104] [2021-11-06 14:22:59,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 14:22:59,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:22:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:22:59,208 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:22:59,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-06 14:23:00,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 14:23:00,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:23:00,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 14:23:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:23:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 50 proven. 196 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-06 14:23:01,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939282104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:23:01,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:23:01,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-11-06 14:23:01,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187458559] [2021-11-06 14:23:01,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-06 14:23:01,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:23:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-06 14:23:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:23:01,260 INFO L87 Difference]: Start difference. First operand 25403 states and 33407 transitions. Second operand has 19 states, 19 states have (on average 13.052631578947368) internal successors, (248), 18 states have internal predecessors, (248), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:23:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:23:08,561 INFO L93 Difference]: Finished difference Result 52093 states and 68701 transitions. [2021-11-06 14:23:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-06 14:23:08,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 13.052631578947368) internal successors, (248), 18 states have internal predecessors, (248), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2021-11-06 14:23:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:23:08,613 INFO L225 Difference]: With dead ends: 52093 [2021-11-06 14:23:08,613 INFO L226 Difference]: Without dead ends: 26703 [2021-11-06 14:23:08,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-11-06 14:23:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26703 states. [2021-11-06 14:23:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26703 to 25507. [2021-11-06 14:23:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25507 states, 25033 states have (on average 1.3140654336276116) internal successors, (32895), 25055 states have internal predecessors, (32895), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:23:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25507 states to 25507 states and 33511 transitions. [2021-11-06 14:23:12,878 INFO L78 Accepts]: Start accepts. Automaton has 25507 states and 33511 transitions. Word has length 279 [2021-11-06 14:23:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:23:12,879 INFO L470 AbstractCegarLoop]: Abstraction has 25507 states and 33511 transitions. [2021-11-06 14:23:12,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.052631578947368) internal successors, (248), 18 states have internal predecessors, (248), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:23:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 25507 states and 33511 transitions. [2021-11-06 14:23:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-06 14:23:12,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:23:12,904 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:23:12,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-06 14:23:13,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:23:13,105 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:23:13,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:23:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash 432023396, now seen corresponding path program 3 times [2021-11-06 14:23:13,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:23:13,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039750373] [2021-11-06 14:23:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:23:13,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:23:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:23:13,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-06 14:23:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:23:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:23:13,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:23:13,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039750373] [2021-11-06 14:23:13,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039750373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:23:13,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512455815] [2021-11-06 14:23:13,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:23:13,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:23:13,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:23:13,265 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:23:13,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-06 14:23:16,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:23:16,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:23:16,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-06 14:23:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:23:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-11-06 14:23:17,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512455815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:23:17,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:23:17,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2021-11-06 14:23:17,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081917140] [2021-11-06 14:23:17,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:23:17,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:23:17,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:23:17,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-06 14:23:17,327 INFO L87 Difference]: Start difference. First operand 25507 states and 33511 transitions. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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 14:24:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:24:10,599 INFO L93 Difference]: Finished difference Result 231440 states and 296362 transitions. [2021-11-06 14:24:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-06 14:24:10,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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 281 [2021-11-06 14:24:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:24:11,192 INFO L225 Difference]: With dead ends: 231440 [2021-11-06 14:24:11,192 INFO L226 Difference]: Without dead ends: 206169 [2021-11-06 14:24:11,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1413, Invalid=7143, Unknown=0, NotChecked=0, Total=8556 [2021-11-06 14:24:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206169 states. [2021-11-06 14:24:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206169 to 25441. [2021-11-06 14:24:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25441 states, 24967 states have (on average 1.3109304281651781) internal successors, (32730), 24989 states have internal predecessors, (32730), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:24:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25441 states to 25441 states and 33346 transitions. [2021-11-06 14:24:17,840 INFO L78 Accepts]: Start accepts. Automaton has 25441 states and 33346 transitions. Word has length 281 [2021-11-06 14:24:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:24:17,840 INFO L470 AbstractCegarLoop]: Abstraction has 25441 states and 33346 transitions. [2021-11-06 14:24:17,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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 14:24:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 25441 states and 33346 transitions. [2021-11-06 14:24:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-06 14:24:17,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:24:17,860 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:17,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-06 14:24:18,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-06 14:24:18,063 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:24:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:24:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash -788763889, now seen corresponding path program 1 times [2021-11-06 14:24:18,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:24:18,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045571892] [2021-11-06 14:24:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:24:18,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:24:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:24:18,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-06 14:24:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:24:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:24:18,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:24:18,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045571892] [2021-11-06 14:24:18,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045571892] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:24:18,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200356982] [2021-11-06 14:24:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:24:18,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:24:18,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:24:18,237 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:24:18,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-06 14:24:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:24:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 3246 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:24:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:24:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:24:20,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200356982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:24:20,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:24:20,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-11-06 14:24:20,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954777068] [2021-11-06 14:24:20,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:24:20,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:24:20,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:24:20,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:24:20,419 INFO L87 Difference]: Start difference. First operand 25441 states and 33346 transitions. Second operand has 10 states, 10 states have (on average 24.9) internal successors, (249), 9 states have internal predecessors, (249), 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 14:24:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:24:30,174 INFO L93 Difference]: Finished difference Result 52148 states and 68551 transitions. [2021-11-06 14:24:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:24:30,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 24.9) internal successors, (249), 9 states have internal predecessors, (249), 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 287 [2021-11-06 14:24:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:24:30,223 INFO L225 Difference]: With dead ends: 52148 [2021-11-06 14:24:30,223 INFO L226 Difference]: Without dead ends: 26720 [2021-11-06 14:24:30,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:24:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26720 states. [2021-11-06 14:24:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26720 to 25531. [2021-11-06 14:24:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25531 states, 25057 states have (on average 1.309813624935148) internal successors, (32820), 25079 states have internal predecessors, (32820), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:24:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25531 states to 25531 states and 33436 transitions. [2021-11-06 14:24:35,586 INFO L78 Accepts]: Start accepts. Automaton has 25531 states and 33436 transitions. Word has length 287 [2021-11-06 14:24:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:24:35,586 INFO L470 AbstractCegarLoop]: Abstraction has 25531 states and 33436 transitions. [2021-11-06 14:24:35,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 24.9) internal successors, (249), 9 states have internal predecessors, (249), 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 14:24:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25531 states and 33436 transitions. [2021-11-06 14:24:35,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-06 14:24:35,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:24:35,605 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:35,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-06 14:24:35,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-06 14:24:35,808 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:24:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:24:35,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1823950677, now seen corresponding path program 1 times [2021-11-06 14:24:35,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:24:35,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559519636] [2021-11-06 14:24:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:24:35,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:24:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:24:36,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:24:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:24:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 50 proven. 225 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-06 14:24:36,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:24:36,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559519636] [2021-11-06 14:24:36,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559519636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:24:36,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841608401] [2021-11-06 14:24:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:24:36,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:24:36,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:24:36,094 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:24:36,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-06 14:24:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:24:37,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 3266 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 14:24:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:24:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 50 proven. 225 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-06 14:24:38,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841608401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:24:38,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:24:38,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-11-06 14:24:38,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676467539] [2021-11-06 14:24:38,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-06 14:24:38,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:24:38,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-06 14:24:38,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:24:38,330 INFO L87 Difference]: Start difference. First operand 25531 states and 33436 transitions. Second operand has 20 states, 20 states have (on average 12.8) internal successors, (256), 19 states have internal predecessors, (256), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:24:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:24:47,045 INFO L93 Difference]: Finished difference Result 52349 states and 68759 transitions. [2021-11-06 14:24:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-06 14:24:47,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 12.8) internal successors, (256), 19 states have internal predecessors, (256), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2021-11-06 14:24:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:24:47,091 INFO L225 Difference]: With dead ends: 52349 [2021-11-06 14:24:47,091 INFO L226 Difference]: Without dead ends: 26831 [2021-11-06 14:24:47,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:24:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26831 states. [2021-11-06 14:24:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26831 to 25635. [2021-11-06 14:24:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25635 states, 25161 states have (on average 1.3085330471761853) internal successors, (32924), 25183 states have internal predecessors, (32924), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:24:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25635 states to 25635 states and 33540 transitions. [2021-11-06 14:24:52,498 INFO L78 Accepts]: Start accepts. Automaton has 25635 states and 33540 transitions. Word has length 287 [2021-11-06 14:24:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:24:52,499 INFO L470 AbstractCegarLoop]: Abstraction has 25635 states and 33540 transitions. [2021-11-06 14:24:52,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.8) internal successors, (256), 19 states have internal predecessors, (256), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:24:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 25635 states and 33540 transitions. [2021-11-06 14:24:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-06 14:24:52,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:24:52,519 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 6, 6, 5, 5, 5, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:24:52,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-06 14:24:52,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-06 14:24:52,720 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:24:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:24:52,720 INFO L85 PathProgramCache]: Analyzing trace with hash 238214899, now seen corresponding path program 2 times [2021-11-06 14:24:52,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:24:52,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901069758] [2021-11-06 14:24:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:24:52,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:24:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:24:52,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-11-06 14:24:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:24:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:24:52,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:24:52,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901069758] [2021-11-06 14:24:52,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901069758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:24:52,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116005310] [2021-11-06 14:24:52,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:24:52,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:24:52,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:24:52,902 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:24:52,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-06 14:24:56,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:24:56,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:24:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 3252 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 14:24:56,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:24:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:24:56,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116005310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:24:56,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:24:56,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-11-06 14:24:56,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956539188] [2021-11-06 14:24:56,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:24:56,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:24:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:24:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:24:56,609 INFO L87 Difference]: Start difference. First operand 25635 states and 33540 transitions. Second operand has 11 states, 11 states have (on average 22.818181818181817) internal successors, (251), 10 states have internal predecessors, (251), 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 14:25:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:25:04,970 INFO L93 Difference]: Finished difference Result 52536 states and 68939 transitions. [2021-11-06 14:25:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 14:25:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 22.818181818181817) internal successors, (251), 10 states have internal predecessors, (251), 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 289 [2021-11-06 14:25:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:25:05,021 INFO L225 Difference]: With dead ends: 52536 [2021-11-06 14:25:05,021 INFO L226 Difference]: Without dead ends: 26914 [2021-11-06 14:25:05,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:25:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-11-06 14:25:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 25725. [2021-11-06 14:25:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25725 states, 25251 states have (on average 1.307433368975486) internal successors, (33014), 25273 states have internal predecessors, (33014), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:25:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25725 states to 25725 states and 33630 transitions. [2021-11-06 14:25:10,494 INFO L78 Accepts]: Start accepts. Automaton has 25725 states and 33630 transitions. Word has length 289 [2021-11-06 14:25:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:25:10,495 INFO L470 AbstractCegarLoop]: Abstraction has 25725 states and 33630 transitions. [2021-11-06 14:25:10,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.818181818181817) internal successors, (251), 10 states have internal predecessors, (251), 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 14:25:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 25725 states and 33630 transitions. [2021-11-06 14:25:10,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-06 14:25:10,515 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:25:10,516 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 7, 7, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:25:10,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-06 14:25:10,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-06 14:25:10,716 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:25:10,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:25:10,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1457274311, now seen corresponding path program 2 times [2021-11-06 14:25:10,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:25:10,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426229900] [2021-11-06 14:25:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:25:10,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:25:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:25:11,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:25:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:25:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 50 proven. 256 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-06 14:25:11,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:25:11,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426229900] [2021-11-06 14:25:11,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426229900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:25:11,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975813937] [2021-11-06 14:25:11,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:25:11,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:25:11,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:25:11,023 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:25:11,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-06 14:25:14,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:25:14,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:25:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 3272 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 14:25:14,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:25:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 50 proven. 256 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-06 14:25:14,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975813937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:25:14,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:25:14,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-11-06 14:25:14,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335977503] [2021-11-06 14:25:14,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-06 14:25:14,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:25:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-06 14:25:14,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-11-06 14:25:14,803 INFO L87 Difference]: Start difference. First operand 25725 states and 33630 transitions. Second operand has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 20 states have internal predecessors, (258), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:25:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:25:23,313 INFO L93 Difference]: Finished difference Result 52737 states and 69147 transitions. [2021-11-06 14:25:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-06 14:25:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 20 states have internal predecessors, (258), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2021-11-06 14:25:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:25:23,363 INFO L225 Difference]: With dead ends: 52737 [2021-11-06 14:25:23,363 INFO L226 Difference]: Without dead ends: 27025 [2021-11-06 14:25:23,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-11-06 14:25:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27025 states. [2021-11-06 14:25:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27025 to 25829. [2021-11-06 14:25:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25829 states, 25355 states have (on average 1.306172352593177) internal successors, (33118), 25377 states have internal predecessors, (33118), 286 states have call successors, (286), 176 states have call predecessors, (286), 187 states have return successors, (330), 319 states have call predecessors, (330), 286 states have call successors, (330) [2021-11-06 14:25:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25829 states to 25829 states and 33734 transitions. [2021-11-06 14:25:28,891 INFO L78 Accepts]: Start accepts. Automaton has 25829 states and 33734 transitions. Word has length 289 [2021-11-06 14:25:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:25:28,891 INFO L470 AbstractCegarLoop]: Abstraction has 25829 states and 33734 transitions. [2021-11-06 14:25:28,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.285714285714286) internal successors, (258), 20 states have internal predecessors, (258), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-06 14:25:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 25829 states and 33734 transitions. [2021-11-06 14:25:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-11-06 14:25:28,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:25:28,911 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:25:28,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-06 14:25:29,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:25:29,112 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:25:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:25:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash -677647913, now seen corresponding path program 3 times [2021-11-06 14:25:29,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:25:29,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390424827] [2021-11-06 14:25:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:25:29,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:25:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:25:29,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-06 14:25:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:25:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:25:29,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:25:29,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390424827] [2021-11-06 14:25:29,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390424827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:25:29,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660934235] [2021-11-06 14:25:29,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:25:29,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:25:29,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:25:29,292 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:25:29,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-06 14:25:32,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:25:32,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:25:32,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-06 14:25:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:25:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-06 14:25:33,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660934235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:25:33,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:25:33,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-11-06 14:25:33,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129724486] [2021-11-06 14:25:33,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:25:33,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:25:33,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:25:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-06 14:25:33,494 INFO L87 Difference]: Start difference. First operand 25829 states and 33734 transitions. Second operand has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 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 14:26:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:26:20,053 INFO L93 Difference]: Finished difference Result 171822 states and 218369 transitions. [2021-11-06 14:26:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-06 14:26:20,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 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 291 [2021-11-06 14:26:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:26:20,324 INFO L225 Difference]: With dead ends: 171822 [2021-11-06 14:26:20,324 INFO L226 Difference]: Without dead ends: 145961 [2021-11-06 14:26:20,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3933 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1892, Invalid=9880, Unknown=0, NotChecked=0, Total=11772 [2021-11-06 14:26:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145961 states. [2021-11-06 14:26:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145961 to 31245. [2021-11-06 14:26:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31245 states, 30760 states have (on average 1.2960988296488947) internal successors, (39868), 30782 states have internal predecessors, (39868), 286 states have call successors, (286), 176 states have call predecessors, (286), 198 states have return successors, (352), 330 states have call predecessors, (352), 286 states have call successors, (352) [2021-11-06 14:26:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31245 states to 31245 states and 40506 transitions. [2021-11-06 14:26:28,711 INFO L78 Accepts]: Start accepts. Automaton has 31245 states and 40506 transitions. Word has length 291 [2021-11-06 14:26:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:26:28,711 INFO L470 AbstractCegarLoop]: Abstraction has 31245 states and 40506 transitions. [2021-11-06 14:26:28,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.818181818181817) internal successors, (229), 11 states have internal predecessors, (229), 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 14:26:28,712 INFO L276 IsEmpty]: Start isEmpty. Operand 31245 states and 40506 transitions. [2021-11-06 14:26:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-06 14:26:28,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:26:28,732 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:26:28,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-06 14:26:28,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:26:28,935 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:26:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:26:28,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1583437421, now seen corresponding path program 1 times [2021-11-06 14:26:28,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:26:28,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564784159] [2021-11-06 14:26:28,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:26:28,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:26:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:26:29,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-06 14:26:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:26:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-06 14:26:29,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:26:29,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564784159] [2021-11-06 14:26:29,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564784159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:26:29,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:26:29,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:26:29,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290850629] [2021-11-06 14:26:29,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:26:29,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:26:29,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:26:29,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:26:29,082 INFO L87 Difference]: Start difference. First operand 31245 states and 40506 transitions. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 14:26:48,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:26:48,645 INFO L93 Difference]: Finished difference Result 86218 states and 111275 transitions. [2021-11-06 14:26:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:26:48,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 303 [2021-11-06 14:26:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:26:48,752 INFO L225 Difference]: With dead ends: 86218 [2021-11-06 14:26:48,752 INFO L226 Difference]: Without dead ends: 55217 [2021-11-06 14:26:48,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:26:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55217 states. [2021-11-06 14:26:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55217 to 31267. [2021-11-06 14:26:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31267 states, 30782 states have (on average 1.2958872068091742) internal successors, (39890), 30804 states have internal predecessors, (39890), 286 states have call successors, (286), 176 states have call predecessors, (286), 198 states have return successors, (352), 330 states have call predecessors, (352), 286 states have call successors, (352) [2021-11-06 14:26:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31267 states to 31267 states and 40528 transitions. [2021-11-06 14:26:56,544 INFO L78 Accepts]: Start accepts. Automaton has 31267 states and 40528 transitions. Word has length 303 [2021-11-06 14:26:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:26:56,544 INFO L470 AbstractCegarLoop]: Abstraction has 31267 states and 40528 transitions. [2021-11-06 14:26:56,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 3 states have internal predecessors, (241), 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 14:26:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 31267 states and 40528 transitions. [2021-11-06 14:26:56,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-06 14:26:56,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:26:56,566 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 7, 7, 5, 5, 5, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:26:56,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-11-06 14:26:56,567 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:26:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:26:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash -186676430, now seen corresponding path program 1 times [2021-11-06 14:26:56,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:26:56,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954029569] [2021-11-06 14:26:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:26:56,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:26:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:26:56,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-11-06 14:26:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:26:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:26:56,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:26:56,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954029569] [2021-11-06 14:26:56,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954029569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:26:56,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627482222] [2021-11-06 14:26:56,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:26:56,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:26:56,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:26:56,771 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:26:56,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-06 14:26:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:26:59,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 3366 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 14:26:59,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:26:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-06 14:26:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627482222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:26:59,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:26:59,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-11-06 14:26:59,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309563960] [2021-11-06 14:26:59,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 14:26:59,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:26:59,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 14:26:59,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:26:59,444 INFO L87 Difference]: Start difference. First operand 31267 states and 40528 transitions. Second operand has 12 states, 12 states have (on average 22.25) internal successors, (267), 11 states have internal predecessors, (267), 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 14:27:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:27:11,438 INFO L93 Difference]: Finished difference Result 63857 states and 82991 transitions. [2021-11-06 14:27:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:27:11,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 22.25) internal successors, (267), 11 states have internal predecessors, (267), 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 305 [2021-11-06 14:27:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:27:11,499 INFO L225 Difference]: With dead ends: 63857 [2021-11-06 14:27:11,500 INFO L226 Difference]: Without dead ends: 32603 [2021-11-06 14:27:11,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:27:11,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32603 states. [2021-11-06 14:27:19,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32603 to 31395. [2021-11-06 14:27:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31395 states, 30910 states have (on average 1.294661921708185) internal successors, (40018), 30932 states have internal predecessors, (40018), 286 states have call successors, (286), 176 states have call predecessors, (286), 198 states have return successors, (352), 330 states have call predecessors, (352), 286 states have call successors, (352) [2021-11-06 14:27:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31395 states to 31395 states and 40656 transitions. [2021-11-06 14:27:19,202 INFO L78 Accepts]: Start accepts. Automaton has 31395 states and 40656 transitions. Word has length 305 [2021-11-06 14:27:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:27:19,202 INFO L470 AbstractCegarLoop]: Abstraction has 31395 states and 40656 transitions. [2021-11-06 14:27:19,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.25) internal successors, (267), 11 states have internal predecessors, (267), 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 14:27:19,202 INFO L276 IsEmpty]: Start isEmpty. Operand 31395 states and 40656 transitions. [2021-11-06 14:27:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-06 14:27:19,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:27:19,224 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:19,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-06 14:27:19,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:19,424 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-06 14:27:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:27:19,425 INFO L85 PathProgramCache]: Analyzing trace with hash 468450338, now seen corresponding path program 1 times [2021-11-06 14:27:19,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:27:19,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498302810] [2021-11-06 14:27:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:19,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:27:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:19,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-06 14:27:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 50 proven. 289 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-06 14:27:19,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:27:19,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498302810] [2021-11-06 14:27:19,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498302810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:19,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296507482] [2021-11-06 14:27:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:27:19,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:27:19,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:27:19,747 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:27:19,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-06 14:27:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:27:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 3386 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-06 14:27:21,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:27:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 50 proven. 289 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-06 14:27:22,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296507482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:27:22,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:27:22,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-11-06 14:27:22,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524411225] [2021-11-06 14:27:22,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-06 14:27:22,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:27:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-06 14:27:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-06 14:27:22,364 INFO L87 Difference]: Start difference. First operand 31395 states and 40656 transitions. Second operand has 22 states, 22 states have (on average 12.454545454545455) internal successors, (274), 21 states have internal predecessors, (274), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Killed by 15