./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.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 1b605371288ab675786f884c3e899aa7b22c9968bb31ac2f2bc3b55776b1682d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:44:39,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:44:39,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:44:39,724 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:44:39,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:44:39,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:44:39,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:44:39,732 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:44:39,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:44:39,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:44:39,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:44:39,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:44:39,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:44:39,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:44:39,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:44:39,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:44:39,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:44:39,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:44:39,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:44:39,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:44:39,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:44:39,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:44:39,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:44:39,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:44:39,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:44:39,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:44:39,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:44:39,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:44:39,763 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:44:39,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:44:39,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:44:39,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:44:39,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:44:39,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:44:39,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:44:39,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:44:39,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:44:39,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:44:39,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:44:39,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:44:39,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:44:39,770 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:44:39,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:44:39,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:44:39,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:44:39,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:44:39,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:44:39,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:44:39,801 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:44:39,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:44:39,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:44:39,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:44:39,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:44:39,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:44:39,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:44:39,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:44:39,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:44:39,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:44:39,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:44:39,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:44:39,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:44:39,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:44:39,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:44:39,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:44:39,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:44:39,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:44:39,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:44:39,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:44:39,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:44:39,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:44:39,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:44:39,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b605371288ab675786f884c3e899aa7b22c9968bb31ac2f2bc3b55776b1682d [2021-11-06 14:44:39,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:44:40,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:44:40,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:44:40,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:44:40,020 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:44:40,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-06 14:44:40,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa26ef686/36f672134bf8445381574e542e1f96c4/FLAG9a31fcbd5 [2021-11-06 14:44:40,629 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:44:40,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-06 14:44:40,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa26ef686/36f672134bf8445381574e542e1f96c4/FLAG9a31fcbd5 [2021-11-06 14:44:41,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa26ef686/36f672134bf8445381574e542e1f96c4 [2021-11-06 14:44:41,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:44:41,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:44:41,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:44:41,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:44:41,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:44:41,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:44:41" (1/1) ... [2021-11-06 14:44:41,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bef5ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:41, skipping insertion in model container [2021-11-06 14:44:41,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:44:41" (1/1) ... [2021-11-06 14:44:41,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:44:41,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:44:41,753 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2021-11-06 14:44:42,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:44:42,103 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:44:42,220 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2021-11-06 14:44:42,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:44:42,402 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:44:42,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42 WrapperNode [2021-11-06 14:44:42,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:44:42,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:44:42,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:44:42,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:44:42,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:44:42,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:44:42,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:44:42,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:44:42,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:44:42,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:44:42,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:44:42,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:44:42,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (1/1) ... [2021-11-06 14:44:42,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:44:42,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:44:42,760 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 14:44:42,778 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 14:44:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:44:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:44:42,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:44:42,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:44:42,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:44:42,796 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 14:44:42,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:44:42,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:44:42,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:44:42,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:44:42,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:44:42,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:44:51,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:44:51,975 INFO L299 CfgBuilder]: Removed 453 assume(true) statements. [2021-11-06 14:44:51,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:44:51 BoogieIcfgContainer [2021-11-06 14:44:51,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:44:51,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:44:51,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:44:51,981 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:44:51,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:44:41" (1/3) ... [2021-11-06 14:44:51,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d1ca09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:44:51, skipping insertion in model container [2021-11-06 14:44:51,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:44:42" (2/3) ... [2021-11-06 14:44:51,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d1ca09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:44:51, skipping insertion in model container [2021-11-06 14:44:51,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:44:51" (3/3) ... [2021-11-06 14:44:51,983 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-06 14:44:51,987 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:44:51,987 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:44:52,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:44:52,033 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 14:44:52,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:44:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 732 states, 730 states have (on average 1.5232876712328767) internal successors, (1112), 731 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-06 14:44:52,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:52,062 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] [2021-11-06 14:44:52,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1244740702, now seen corresponding path program 1 times [2021-11-06 14:44:52,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:52,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440876961] [2021-11-06 14:44:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:52,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:52,562 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 14:44:52,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:52,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440876961] [2021-11-06 14:44:52,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440876961] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:52,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:52,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:44:52,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235838384] [2021-11-06 14:44:52,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:44:52,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:52,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:44:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:52,584 INFO L87 Difference]: Start difference. First operand has 732 states, 730 states have (on average 1.5232876712328767) internal successors, (1112), 731 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:54,867 INFO L93 Difference]: Finished difference Result 2159 states and 3291 transitions. [2021-11-06 14:44:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:44:54,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-06 14:44:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:54,889 INFO L225 Difference]: With dead ends: 2159 [2021-11-06 14:44:54,890 INFO L226 Difference]: Without dead ends: 1420 [2021-11-06 14:44:54,897 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 14:44:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-11-06 14:44:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1420. [2021-11-06 14:44:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 1.4940098661028893) internal successors, (2120), 1419 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2120 transitions. [2021-11-06 14:44:54,990 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2120 transitions. Word has length 20 [2021-11-06 14:44:54,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:54,990 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 2120 transitions. [2021-11-06 14:44:54,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2120 transitions. [2021-11-06 14:44:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-06 14:44:54,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:54,998 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 14:44:54,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:44:54,998 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:55,002 INFO L85 PathProgramCache]: Analyzing trace with hash 104665615, now seen corresponding path program 1 times [2021-11-06 14:44:55,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:55,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749381720] [2021-11-06 14:44:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:55,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:55,209 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 14:44:55,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:55,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749381720] [2021-11-06 14:44:55,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749381720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:55,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:55,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:44:55,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40054320] [2021-11-06 14:44:55,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:44:55,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:55,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:44:55,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:55,213 INFO L87 Difference]: Start difference. First operand 1420 states and 2120 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 14:44:55,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:55,299 INFO L93 Difference]: Finished difference Result 1430 states and 2128 transitions. [2021-11-06 14:44:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:44:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 14:44:55,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:55,305 INFO L225 Difference]: With dead ends: 1430 [2021-11-06 14:44:55,306 INFO L226 Difference]: Without dead ends: 1425 [2021-11-06 14:44:55,307 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 14:44:55,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-11-06 14:44:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1420. [2021-11-06 14:44:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 1.4933051444679353) internal successors, (2119), 1419 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 2119 transitions. [2021-11-06 14:44:55,340 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 2119 transitions. Word has length 27 [2021-11-06 14:44:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:55,341 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 2119 transitions. [2021-11-06 14:44:55,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 14:44:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 2119 transitions. [2021-11-06 14:44:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-06 14:44:55,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:55,344 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 14:44:55,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:44:55,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:55,345 INFO L85 PathProgramCache]: Analyzing trace with hash 161923917, now seen corresponding path program 1 times [2021-11-06 14:44:55,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:55,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125727459] [2021-11-06 14:44:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:55,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:55,556 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 14:44:55,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:55,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125727459] [2021-11-06 14:44:55,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125727459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:55,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:55,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:44:55,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515985592] [2021-11-06 14:44:55,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:44:55,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:55,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:44:55,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:44:55,558 INFO L87 Difference]: Start difference. First operand 1420 states and 2119 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 14:44:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:55,900 INFO L93 Difference]: Finished difference Result 4236 states and 6330 transitions. [2021-11-06 14:44:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:44:55,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 14:44:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:55,909 INFO L225 Difference]: With dead ends: 4236 [2021-11-06 14:44:55,909 INFO L226 Difference]: Without dead ends: 2822 [2021-11-06 14:44:55,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:44:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2021-11-06 14:44:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 2806. [2021-11-06 14:44:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2805 states have (on average 1.494830659536542) internal successors, (4193), 2805 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 4193 transitions. [2021-11-06 14:44:55,962 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 4193 transitions. Word has length 27 [2021-11-06 14:44:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:55,963 INFO L470 AbstractCegarLoop]: Abstraction has 2806 states and 4193 transitions. [2021-11-06 14:44:55,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 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 14:44:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 4193 transitions. [2021-11-06 14:44:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-06 14:44:55,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:55,968 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:44:55,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:44:55,969 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash 944060928, now seen corresponding path program 1 times [2021-11-06 14:44:55,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:55,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037805411] [2021-11-06 14:44:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:55,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:56,187 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 14:44:56,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:56,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037805411] [2021-11-06 14:44:56,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037805411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:56,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:56,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:44:56,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581951413] [2021-11-06 14:44:56,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:44:56,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:44:56,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:56,193 INFO L87 Difference]: Start difference. First operand 2806 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:56,349 INFO L93 Difference]: Finished difference Result 5933 states and 8897 transitions. [2021-11-06 14:44:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:44:56,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-06 14:44:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:56,359 INFO L225 Difference]: With dead ends: 5933 [2021-11-06 14:44:56,359 INFO L226 Difference]: Without dead ends: 3138 [2021-11-06 14:44:56,363 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 14:44:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2021-11-06 14:44:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 3128. [2021-11-06 14:44:56,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 1.5043172369683402) internal successors, (4704), 3127 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4704 transitions. [2021-11-06 14:44:56,425 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4704 transitions. Word has length 57 [2021-11-06 14:44:56,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:56,426 INFO L470 AbstractCegarLoop]: Abstraction has 3128 states and 4704 transitions. [2021-11-06 14:44:56,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4704 transitions. [2021-11-06 14:44:56,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 14:44:56,429 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:56,430 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, 1, 1, 1] [2021-11-06 14:44:56,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:44:56,430 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:56,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:56,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1782814012, now seen corresponding path program 1 times [2021-11-06 14:44:56,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:56,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7901303] [2021-11-06 14:44:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:56,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:56,613 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 14:44:56,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:56,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7901303] [2021-11-06 14:44:56,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7901303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:56,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:56,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:44:56,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684560748] [2021-11-06 14:44:56,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:44:56,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:56,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:44:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:56,617 INFO L87 Difference]: Start difference. First operand 3128 states and 4704 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:44:58,929 INFO L93 Difference]: Finished difference Result 6629 states and 10015 transitions. [2021-11-06 14:44:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:44:58,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-06 14:44:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:44:58,940 INFO L225 Difference]: With dead ends: 6629 [2021-11-06 14:44:58,940 INFO L226 Difference]: Without dead ends: 3512 [2021-11-06 14:44:58,945 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 14:44:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3512 states. [2021-11-06 14:44:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3512 to 3502. [2021-11-06 14:44:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3502 states, 3501 states have (on average 1.5101399600114254) internal successors, (5287), 3501 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3502 states to 3502 states and 5287 transitions. [2021-11-06 14:44:59,058 INFO L78 Accepts]: Start accepts. Automaton has 3502 states and 5287 transitions. Word has length 65 [2021-11-06 14:44:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:44:59,059 INFO L470 AbstractCegarLoop]: Abstraction has 3502 states and 5287 transitions. [2021-11-06 14:44:59,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:44:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3502 states and 5287 transitions. [2021-11-06 14:44:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-06 14:44:59,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:44:59,063 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:44:59,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:44:59,064 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:44:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:44:59,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2010505363, now seen corresponding path program 1 times [2021-11-06 14:44:59,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:44:59,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154639536] [2021-11-06 14:44:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:44:59,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:44:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:44:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:44:59,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:44:59,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154639536] [2021-11-06 14:44:59,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154639536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:44:59,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:44:59,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:44:59,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020168582] [2021-11-06 14:44:59,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:44:59,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:44:59,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:44:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:44:59,214 INFO L87 Difference]: Start difference. First operand 3502 states and 5287 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 14:45:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:01,511 INFO L93 Difference]: Finished difference Result 7372 states and 11177 transitions. [2021-11-06 14:45:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:01,511 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 82 [2021-11-06 14:45:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:01,523 INFO L225 Difference]: With dead ends: 7372 [2021-11-06 14:45:01,523 INFO L226 Difference]: Without dead ends: 3881 [2021-11-06 14:45:01,529 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 14:45:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3881 states. [2021-11-06 14:45:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3881 to 3876. [2021-11-06 14:45:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3876 states, 3875 states have (on average 1.5158709677419355) internal successors, (5874), 3875 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 5874 transitions. [2021-11-06 14:45:01,606 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 5874 transitions. Word has length 82 [2021-11-06 14:45:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:01,607 INFO L470 AbstractCegarLoop]: Abstraction has 3876 states and 5874 transitions. [2021-11-06 14:45:01,607 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 14:45:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 5874 transitions. [2021-11-06 14:45:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-06 14:45:01,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:01,612 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 14:45:01,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:45:01,612 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:01,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:01,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2103832470, now seen corresponding path program 1 times [2021-11-06 14:45:01,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:01,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627045025] [2021-11-06 14:45:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:01,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-06 14:45:01,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:01,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627045025] [2021-11-06 14:45:01,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627045025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:01,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:01,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:45:01,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001302824] [2021-11-06 14:45:01,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:45:01,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:01,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:45:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:45:01,880 INFO L87 Difference]: Start difference. First operand 3876 states and 5874 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:02,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:02,229 INFO L93 Difference]: Finished difference Result 18669 states and 28376 transitions. [2021-11-06 14:45:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:45:02,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-06 14:45:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:02,284 INFO L225 Difference]: With dead ends: 18669 [2021-11-06 14:45:02,284 INFO L226 Difference]: Without dead ends: 14804 [2021-11-06 14:45:02,295 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 14:45:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14804 states. [2021-11-06 14:45:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14804 to 3892. [2021-11-06 14:45:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3891 states have (on average 1.5137496787458238) internal successors, (5890), 3891 states have internal predecessors, (5890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 5890 transitions. [2021-11-06 14:45:02,501 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 5890 transitions. Word has length 101 [2021-11-06 14:45:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:02,501 INFO L470 AbstractCegarLoop]: Abstraction has 3892 states and 5890 transitions. [2021-11-06 14:45:02,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:02,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 5890 transitions. [2021-11-06 14:45:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-06 14:45:02,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:02,509 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 14:45:02,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:45:02,510 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash -343794334, now seen corresponding path program 1 times [2021-11-06 14:45:02,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:02,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100644675] [2021-11-06 14:45:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:02,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-06 14:45:02,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:02,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100644675] [2021-11-06 14:45:02,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100644675] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:02,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:02,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:45:02,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772948603] [2021-11-06 14:45:02,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:45:02,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:45:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:45:02,708 INFO L87 Difference]: Start difference. First operand 3892 states and 5890 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:02,907 INFO L93 Difference]: Finished difference Result 9406 states and 14264 transitions. [2021-11-06 14:45:02,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:45:02,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-06 14:45:02,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:02,918 INFO L225 Difference]: With dead ends: 9406 [2021-11-06 14:45:02,919 INFO L226 Difference]: Without dead ends: 5525 [2021-11-06 14:45:02,925 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 14:45:02,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-11-06 14:45:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 3892. [2021-11-06 14:45:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3892 states, 3891 states have (on average 1.51272166538165) internal successors, (5886), 3891 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3892 states to 3892 states and 5886 transitions. [2021-11-06 14:45:03,056 INFO L78 Accepts]: Start accepts. Automaton has 3892 states and 5886 transitions. Word has length 104 [2021-11-06 14:45:03,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:03,056 INFO L470 AbstractCegarLoop]: Abstraction has 3892 states and 5886 transitions. [2021-11-06 14:45:03,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3892 states and 5886 transitions. [2021-11-06 14:45:03,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-06 14:45:03,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:03,061 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 14:45:03,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:45:03,062 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:03,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash 243011680, now seen corresponding path program 1 times [2021-11-06 14:45:03,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:03,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803312022] [2021-11-06 14:45:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:03,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 14:45:03,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:03,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803312022] [2021-11-06 14:45:03,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803312022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:45:03,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584563894] [2021-11-06 14:45:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:03,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:45:03,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:45:03,264 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 14:45:03,289 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 14:45:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2910 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 14:45:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:45:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 14:45:04,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584563894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:04,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:45:04,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 14:45:04,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149810231] [2021-11-06 14:45:04,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:45:04,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:04,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:45:04,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:45:04,476 INFO L87 Difference]: Start difference. First operand 3892 states and 5886 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:06,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:06,909 INFO L93 Difference]: Finished difference Result 10124 states and 15271 transitions. [2021-11-06 14:45:06,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:45:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-06 14:45:06,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:06,926 INFO L225 Difference]: With dead ends: 10124 [2021-11-06 14:45:06,926 INFO L226 Difference]: Without dead ends: 6243 [2021-11-06 14:45:06,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:45:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-11-06 14:45:07,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 4276. [2021-11-06 14:45:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 1.5097076023391813) internal successors, (6454), 4275 states have internal predecessors, (6454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 6454 transitions. [2021-11-06 14:45:07,046 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 6454 transitions. Word has length 104 [2021-11-06 14:45:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:07,046 INFO L470 AbstractCegarLoop]: Abstraction has 4276 states and 6454 transitions. [2021-11-06 14:45:07,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 6454 transitions. [2021-11-06 14:45:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-06 14:45:07,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:07,055 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:07,078 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 14:45:07,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:45:07,267 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1970201798, now seen corresponding path program 1 times [2021-11-06 14:45:07,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:07,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129278252] [2021-11-06 14:45:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:07,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 14:45:07,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:07,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129278252] [2021-11-06 14:45:07,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129278252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:07,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:07,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:07,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221736001] [2021-11-06 14:45:07,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:07,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:07,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:07,437 INFO L87 Difference]: Start difference. First operand 4276 states and 6454 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:07,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:07,521 INFO L93 Difference]: Finished difference Result 8545 states and 12903 transitions. [2021-11-06 14:45:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:07,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-06 14:45:07,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:07,529 INFO L225 Difference]: With dead ends: 8545 [2021-11-06 14:45:07,529 INFO L226 Difference]: Without dead ends: 4280 [2021-11-06 14:45:07,535 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 14:45:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2021-11-06 14:45:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 4280. [2021-11-06 14:45:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.509231128768404) internal successors, (6458), 4279 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6458 transitions. [2021-11-06 14:45:07,626 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6458 transitions. Word has length 136 [2021-11-06 14:45:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:07,627 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6458 transitions. [2021-11-06 14:45:07,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6458 transitions. [2021-11-06 14:45:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-06 14:45:07,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:07,632 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:07,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 14:45:07,633 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash 29619784, now seen corresponding path program 1 times [2021-11-06 14:45:07,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:07,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322935402] [2021-11-06 14:45:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:07,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 14:45:07,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:07,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322935402] [2021-11-06 14:45:07,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322935402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:45:07,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441721344] [2021-11-06 14:45:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:07,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:45:07,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:45:07,940 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 14:45:07,941 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 14:45:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 3238 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:45:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:45:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 14:45:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441721344] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:09,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:45:09,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-06 14:45:09,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856060892] [2021-11-06 14:45:09,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:45:09,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:45:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:09,574 INFO L87 Difference]: Start difference. First operand 4280 states and 6458 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:11,926 INFO L93 Difference]: Finished difference Result 6344 states and 9544 transitions. [2021-11-06 14:45:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:45:11,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-11-06 14:45:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:11,937 INFO L225 Difference]: With dead ends: 6344 [2021-11-06 14:45:11,938 INFO L226 Difference]: Without dead ends: 6337 [2021-11-06 14:45:11,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 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 14:45:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2021-11-06 14:45:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 5266. [2021-11-06 14:45:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5266 states, 5265 states have (on average 1.5061728395061729) internal successors, (7930), 5265 states have internal predecessors, (7930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5266 states to 5266 states and 7930 transitions. [2021-11-06 14:45:12,062 INFO L78 Accepts]: Start accepts. Automaton has 5266 states and 7930 transitions. Word has length 136 [2021-11-06 14:45:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:12,062 INFO L470 AbstractCegarLoop]: Abstraction has 5266 states and 7930 transitions. [2021-11-06 14:45:12,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5266 states and 7930 transitions. [2021-11-06 14:45:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-06 14:45:12,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:12,068 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2021-11-06 14:45:12,091 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 14:45:12,289 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 14:45:12,289 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:12,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1495766553, now seen corresponding path program 1 times [2021-11-06 14:45:12,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:12,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402080798] [2021-11-06 14:45:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:12,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:45:12,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:12,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402080798] [2021-11-06 14:45:12,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402080798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:45:12,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829584192] [2021-11-06 14:45:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:12,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:45:12,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:45:12,660 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 14:45:12,661 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 14:45:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 3313 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:45:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:45:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-06 14:45:14,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829584192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:14,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:45:14,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-06 14:45:14,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571760381] [2021-11-06 14:45:14,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:14,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:14,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:14,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:45:14,217 INFO L87 Difference]: Start difference. First operand 5266 states and 7930 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 14:45:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:16,507 INFO L93 Difference]: Finished difference Result 10521 states and 15847 transitions. [2021-11-06 14:45:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:16,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 143 [2021-11-06 14:45:16,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:16,515 INFO L225 Difference]: With dead ends: 10521 [2021-11-06 14:45:16,515 INFO L226 Difference]: Without dead ends: 5104 [2021-11-06 14:45:16,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:45:16,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-11-06 14:45:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 5104. [2021-11-06 14:45:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5104 states, 5103 states have (on average 1.5002939447383892) internal successors, (7656), 5103 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:16,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5104 states to 5104 states and 7656 transitions. [2021-11-06 14:45:16,652 INFO L78 Accepts]: Start accepts. Automaton has 5104 states and 7656 transitions. Word has length 143 [2021-11-06 14:45:16,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:16,653 INFO L470 AbstractCegarLoop]: Abstraction has 5104 states and 7656 transitions. [2021-11-06 14:45:16,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 14:45:16,653 INFO L276 IsEmpty]: Start isEmpty. Operand 5104 states and 7656 transitions. [2021-11-06 14:45:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-06 14:45:16,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:16,658 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:45:16,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 14:45:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:45:16,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash 748791845, now seen corresponding path program 1 times [2021-11-06 14:45:16,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:16,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350202622] [2021-11-06 14:45:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:16,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-06 14:45:16,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:16,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350202622] [2021-11-06 14:45:16,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350202622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:16,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:16,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:16,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26729716] [2021-11-06 14:45:17,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:17,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:17,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:17,001 INFO L87 Difference]: Start difference. First operand 5104 states and 7656 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 14:45:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:19,229 INFO L93 Difference]: Finished difference Result 7651 states and 11475 transitions. [2021-11-06 14:45:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:19,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 143 [2021-11-06 14:45:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:19,235 INFO L225 Difference]: With dead ends: 7651 [2021-11-06 14:45:19,235 INFO L226 Difference]: Without dead ends: 2557 [2021-11-06 14:45:19,240 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 14:45:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-11-06 14:45:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2557. [2021-11-06 14:45:19,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2556 states have (on average 1.498435054773083) internal successors, (3830), 2556 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3830 transitions. [2021-11-06 14:45:19,295 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3830 transitions. Word has length 143 [2021-11-06 14:45:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:19,295 INFO L470 AbstractCegarLoop]: Abstraction has 2557 states and 3830 transitions. [2021-11-06 14:45:19,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 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 14:45:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3830 transitions. [2021-11-06 14:45:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-06 14:45:19,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:19,299 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:19,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 14:45:19,300 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash -58519242, now seen corresponding path program 1 times [2021-11-06 14:45:19,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:19,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906058132] [2021-11-06 14:45:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:19,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 14:45:19,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:19,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906058132] [2021-11-06 14:45:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906058132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:19,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:19,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:45:19,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035190833] [2021-11-06 14:45:19,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:45:19,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:45:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:19,668 INFO L87 Difference]: Start difference. First operand 2557 states and 3830 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:22,040 INFO L93 Difference]: Finished difference Result 6418 states and 9623 transitions. [2021-11-06 14:45:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:45:22,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 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 14:45:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:22,046 INFO L225 Difference]: With dead ends: 6418 [2021-11-06 14:45:22,046 INFO L226 Difference]: Without dead ends: 3964 [2021-11-06 14:45:22,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:45:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2021-11-06 14:45:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 2585. [2021-11-06 14:45:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 1.498452012383901) internal successors, (3872), 2584 states have internal predecessors, (3872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3872 transitions. [2021-11-06 14:45:22,113 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3872 transitions. Word has length 165 [2021-11-06 14:45:22,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:22,113 INFO L470 AbstractCegarLoop]: Abstraction has 2585 states and 3872 transitions. [2021-11-06 14:45:22,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3872 transitions. [2021-11-06 14:45:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-06 14:45:22,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:22,117 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:22,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 14:45:22,117 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:22,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:22,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2072457957, now seen corresponding path program 1 times [2021-11-06 14:45:22,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:22,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808342503] [2021-11-06 14:45:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:22,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-06 14:45:22,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:22,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808342503] [2021-11-06 14:45:22,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808342503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:22,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:22,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 14:45:22,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855701755] [2021-11-06 14:45:22,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 14:45:22,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:22,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 14:45:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:45:22,591 INFO L87 Difference]: Start difference. First operand 2585 states and 3872 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:23,296 INFO L93 Difference]: Finished difference Result 11284 states and 16902 transitions. [2021-11-06 14:45:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 14:45:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 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 14:45:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:23,309 INFO L225 Difference]: With dead ends: 11284 [2021-11-06 14:45:23,309 INFO L226 Difference]: Without dead ends: 8802 [2021-11-06 14:45:23,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:45:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8802 states. [2021-11-06 14:45:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8802 to 2600. [2021-11-06 14:45:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 1.4955752212389382) internal successors, (3887), 2599 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 3887 transitions. [2021-11-06 14:45:23,427 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 3887 transitions. Word has length 167 [2021-11-06 14:45:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:23,427 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 3887 transitions. [2021-11-06 14:45:23,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 3887 transitions. [2021-11-06 14:45:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-06 14:45:23,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:23,431 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:23,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 14:45:23,431 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:23,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:23,431 INFO L85 PathProgramCache]: Analyzing trace with hash 463025079, now seen corresponding path program 1 times [2021-11-06 14:45:23,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:23,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046653593] [2021-11-06 14:45:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:23,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-06 14:45:23,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:23,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046653593] [2021-11-06 14:45:23,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046653593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:23,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:23,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:45:23,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457105642] [2021-11-06 14:45:23,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:45:23,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:23,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:45:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:23,774 INFO L87 Difference]: Start difference. First operand 2600 states and 3887 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:24,292 INFO L93 Difference]: Finished difference Result 11887 states and 17793 transitions. [2021-11-06 14:45:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:45:24,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 169 [2021-11-06 14:45:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:24,304 INFO L225 Difference]: With dead ends: 11887 [2021-11-06 14:45:24,304 INFO L226 Difference]: Without dead ends: 9390 [2021-11-06 14:45:24,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:45:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9390 states. [2021-11-06 14:45:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9390 to 2609. [2021-11-06 14:45:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 1.4938650306748467) internal successors, (3896), 2608 states have internal predecessors, (3896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:24,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 3896 transitions. [2021-11-06 14:45:24,415 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 3896 transitions. Word has length 169 [2021-11-06 14:45:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:24,415 INFO L470 AbstractCegarLoop]: Abstraction has 2609 states and 3896 transitions. [2021-11-06 14:45:24,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 3896 transitions. [2021-11-06 14:45:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-06 14:45:24,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:24,418 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:24,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 14:45:24,419 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:24,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2073944685, now seen corresponding path program 1 times [2021-11-06 14:45:24,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:24,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162291233] [2021-11-06 14:45:24,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:24,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-06 14:45:24,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:24,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162291233] [2021-11-06 14:45:24,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162291233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:24,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:24,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:45:24,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317892977] [2021-11-06 14:45:24,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:45:24,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:45:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:24,773 INFO L87 Difference]: Start difference. First operand 2609 states and 3896 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:25,198 INFO L93 Difference]: Finished difference Result 8719 states and 13049 transitions. [2021-11-06 14:45:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:45:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-11-06 14:45:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:25,206 INFO L225 Difference]: With dead ends: 8719 [2021-11-06 14:45:25,206 INFO L226 Difference]: Without dead ends: 6213 [2021-11-06 14:45:25,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:45:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-11-06 14:45:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 2618. [2021-11-06 14:45:25,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 1.492166602980512) internal successors, (3905), 2617 states have internal predecessors, (3905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:25,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3905 transitions. [2021-11-06 14:45:25,337 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3905 transitions. Word has length 171 [2021-11-06 14:45:25,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:25,337 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 3905 transitions. [2021-11-06 14:45:25,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3905 transitions. [2021-11-06 14:45:25,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-06 14:45:25,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:25,340 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:25,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 14:45:25,340 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:25,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1044890223, now seen corresponding path program 1 times [2021-11-06 14:45:25,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:25,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311683155] [2021-11-06 14:45:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:25,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-06 14:45:25,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:25,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311683155] [2021-11-06 14:45:25,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311683155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:25,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:25,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 14:45:25,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266501006] [2021-11-06 14:45:25,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 14:45:25,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 14:45:25,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 14:45:25,722 INFO L87 Difference]: Start difference. First operand 2618 states and 3905 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:26,196 INFO L93 Difference]: Finished difference Result 7568 states and 11313 transitions. [2021-11-06 14:45:26,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:45:26,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 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 173 [2021-11-06 14:45:26,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:26,204 INFO L225 Difference]: With dead ends: 7568 [2021-11-06 14:45:26,204 INFO L226 Difference]: Without dead ends: 5053 [2021-11-06 14:45:26,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:45:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2021-11-06 14:45:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 2630. [2021-11-06 14:45:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 1.489920121719285) internal successors, (3917), 2629 states have internal predecessors, (3917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 3917 transitions. [2021-11-06 14:45:26,330 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 3917 transitions. Word has length 173 [2021-11-06 14:45:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:26,330 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 3917 transitions. [2021-11-06 14:45:26,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 3917 transitions. [2021-11-06 14:45:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-06 14:45:26,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:26,333 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:26,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-06 14:45:26,334 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:26,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:26,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1221041589, now seen corresponding path program 1 times [2021-11-06 14:45:26,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:26,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928429685] [2021-11-06 14:45:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:26,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-06 14:45:26,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:26,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928429685] [2021-11-06 14:45:26,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928429685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:26,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:26,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:45:26,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572416450] [2021-11-06 14:45:26,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:45:26,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:26,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:45:26,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:45:26,658 INFO L87 Difference]: Start difference. First operand 2630 states and 3917 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:27,211 INFO L93 Difference]: Finished difference Result 9079 states and 13565 transitions. [2021-11-06 14:45:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:45:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 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 175 [2021-11-06 14:45:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:27,219 INFO L225 Difference]: With dead ends: 9079 [2021-11-06 14:45:27,219 INFO L226 Difference]: Without dead ends: 6552 [2021-11-06 14:45:27,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:45:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6552 states. [2021-11-06 14:45:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6552 to 2639. [2021-11-06 14:45:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 2638 states have (on average 1.488248673237301) internal successors, (3926), 2638 states have internal predecessors, (3926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 3926 transitions. [2021-11-06 14:45:27,354 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 3926 transitions. Word has length 175 [2021-11-06 14:45:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:27,355 INFO L470 AbstractCegarLoop]: Abstraction has 2639 states and 3926 transitions. [2021-11-06 14:45:27,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:27,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 3926 transitions. [2021-11-06 14:45:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-06 14:45:27,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:27,357 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:27,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-06 14:45:27,358 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash -181237521, now seen corresponding path program 1 times [2021-11-06 14:45:27,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:27,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780217409] [2021-11-06 14:45:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:27,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-06 14:45:27,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:27,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780217409] [2021-11-06 14:45:27,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780217409] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:27,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:45:27,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:45:27,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240266248] [2021-11-06 14:45:27,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:45:27,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:27,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:45:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:45:27,702 INFO L87 Difference]: Start difference. First operand 2639 states and 3926 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:27,833 INFO L93 Difference]: Finished difference Result 5270 states and 7843 transitions. [2021-11-06 14:45:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:45:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 177 [2021-11-06 14:45:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:27,836 INFO L225 Difference]: With dead ends: 5270 [2021-11-06 14:45:27,837 INFO L226 Difference]: Without dead ends: 2640 [2021-11-06 14:45:27,839 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 14:45:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-11-06 14:45:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2640. [2021-11-06 14:45:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 1.4880636604774535) internal successors, (3927), 2639 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3927 transitions. [2021-11-06 14:45:27,935 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3927 transitions. Word has length 177 [2021-11-06 14:45:27,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:27,935 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 3927 transitions. [2021-11-06 14:45:27,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3927 transitions. [2021-11-06 14:45:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-06 14:45:27,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:27,938 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:27,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-06 14:45:27,939 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1457598882, now seen corresponding path program 1 times [2021-11-06 14:45:27,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:27,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186086696] [2021-11-06 14:45:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:27,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-06 14:45:28,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:28,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186086696] [2021-11-06 14:45:28,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186086696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:45:28,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529924350] [2021-11-06 14:45:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:28,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:45:28,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:45:28,361 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 14:45:28,362 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 14:45:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:29,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 3576 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 14:45:29,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:45:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 14:45:29,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529924350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:45:29,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:45:29,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 14:45:29,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891021571] [2021-11-06 14:45:29,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:45:29,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:45:29,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:45:29,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:45:29,675 INFO L87 Difference]: Start difference. First operand 2640 states and 3927 transitions. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:45:32,158 INFO L93 Difference]: Finished difference Result 7970 states and 11863 transitions. [2021-11-06 14:45:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:45:32,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 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 178 [2021-11-06 14:45:32,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:45:32,166 INFO L225 Difference]: With dead ends: 7970 [2021-11-06 14:45:32,166 INFO L226 Difference]: Without dead ends: 5434 [2021-11-06 14:45:32,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:45:32,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-11-06 14:45:32,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 2640. [2021-11-06 14:45:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 1.4880636604774535) internal successors, (3927), 2639 states have internal predecessors, (3927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:32,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3927 transitions. [2021-11-06 14:45:32,280 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3927 transitions. Word has length 178 [2021-11-06 14:45:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:45:32,280 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 3927 transitions. [2021-11-06 14:45:32,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:45:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3927 transitions. [2021-11-06 14:45:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-06 14:45:32,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:45:32,283 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:45:32,307 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 14:45:32,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:45:32,490 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:45:32,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:45:32,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1246300446, now seen corresponding path program 1 times [2021-11-06 14:45:32,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:45:32,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551840741] [2021-11-06 14:45:32,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:32,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:45:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:45:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-06 14:45:32,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:45:32,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551840741] [2021-11-06 14:45:32,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551840741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:45:32,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719798813] [2021-11-06 14:45:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:45:32,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:45:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:45:32,923 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 14:45:32,924 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 14:47:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 3602 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:47:41,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:47:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-06 14:47:42,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719798813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:47:42,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:47:42,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 14:47:42,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836730262] [2021-11-06 14:47:42,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:47:42,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:47:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:47:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:47:42,461 INFO L87 Difference]: Start difference. First operand 2640 states and 3927 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:47:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:47:42,573 INFO L93 Difference]: Finished difference Result 5287 states and 7865 transitions. [2021-11-06 14:47:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:47:42,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 180 [2021-11-06 14:47:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:47:42,579 INFO L225 Difference]: With dead ends: 5287 [2021-11-06 14:47:42,579 INFO L226 Difference]: Without dead ends: 2751 [2021-11-06 14:47:42,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:47:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-11-06 14:47:42,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2640. [2021-11-06 14:47:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 1.486926866237211) internal successors, (3924), 2639 states have internal predecessors, (3924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:47:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3924 transitions. [2021-11-06 14:47:42,748 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3924 transitions. Word has length 180 [2021-11-06 14:47:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:47:42,748 INFO L470 AbstractCegarLoop]: Abstraction has 2640 states and 3924 transitions. [2021-11-06 14:47:42,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:47:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3924 transitions. [2021-11-06 14:47:42,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-06 14:47:42,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:47:42,751 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:47:42,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-06 14:47:42,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-06 14:47:42,952 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:47:42,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:47:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 70249393, now seen corresponding path program 1 times [2021-11-06 14:47:42,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:47:42,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222655718] [2021-11-06 14:47:42,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:42,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:47:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:47:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-06 14:47:43,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:47:43,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222655718] [2021-11-06 14:47:43,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222655718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:47:43,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249185206] [2021-11-06 14:47:43,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:47:43,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:47:43,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:47:43,420 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 14:47:43,421 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 14:49:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:49:27,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 3625 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 14:49:27,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:49:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-06 14:49:27,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249185206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:49:27,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:49:27,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 14:49:27,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123559944] [2021-11-06 14:49:27,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:49:27,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:49:27,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:49:27,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:49:27,938 INFO L87 Difference]: Start difference. First operand 2640 states and 3924 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:49:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:49:28,101 INFO L93 Difference]: Finished difference Result 5271 states and 7838 transitions. [2021-11-06 14:49:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:49:28,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 181 [2021-11-06 14:49:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:49:28,104 INFO L225 Difference]: With dead ends: 5271 [2021-11-06 14:49:28,104 INFO L226 Difference]: Without dead ends: 2641 [2021-11-06 14:49:28,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:49:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-11-06 14:49:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2641. [2021-11-06 14:49:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2640 states have (on average 1.4867424242424243) internal successors, (3925), 2640 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:49:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 3925 transitions. [2021-11-06 14:49:28,214 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 3925 transitions. Word has length 181 [2021-11-06 14:49:28,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:49:28,214 INFO L470 AbstractCegarLoop]: Abstraction has 2641 states and 3925 transitions. [2021-11-06 14:49:28,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:49:28,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 3925 transitions. [2021-11-06 14:49:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-06 14:49:28,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:49:28,217 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 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, 1, 1, 1, 1] [2021-11-06 14:49:28,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 14:49:28,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:49:28,432 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:49:28,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:49:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1265770080, now seen corresponding path program 2 times [2021-11-06 14:49:28,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:49:28,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349192087] [2021-11-06 14:49:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:49:28,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:49:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:49:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-06 14:49:28,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:49:28,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349192087] [2021-11-06 14:49:28,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349192087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:49:28,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89551378] [2021-11-06 14:49:28,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:49:28,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:49:28,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:49:28,859 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 14:49:28,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15