./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.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 cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 16:25:35,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 16:25:35,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 16:25:35,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 16:25:35,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 16:25:35,875 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 16:25:35,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 16:25:35,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 16:25:35,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 16:25:35,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 16:25:35,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 16:25:35,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 16:25:35,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 16:25:35,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 16:25:35,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 16:25:35,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 16:25:35,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 16:25:35,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 16:25:35,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 16:25:35,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 16:25:35,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 16:25:35,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 16:25:35,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 16:25:35,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 16:25:35,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 16:25:35,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 16:25:35,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 16:25:35,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 16:25:35,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 16:25:35,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 16:25:35,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 16:25:35,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 16:25:35,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 16:25:35,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 16:25:35,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 16:25:35,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 16:25:35,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 16:25:35,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 16:25:35,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 16:25:35,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 16:25:35,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 16:25:35,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 16:25:35,967 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 16:25:35,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 16:25:35,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 16:25:35,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 16:25:35,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 16:25:35,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 16:25:35,971 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 16:25:35,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 16:25:35,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 16:25:35,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 16:25:35,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 16:25:35,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 16:25:35,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 16:25:35,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 16:25:35,973 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 16:25:35,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 16:25:35,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 16:25:35,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 16:25:35,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 16:25:35,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:25:35,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 16:25:35,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 16:25:35,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 16:25:35,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 16:25:35,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 16:25:35,975 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 16:25:35,975 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 16:25:35,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 16:25:35,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 16:25:35,976 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c [2021-11-05 16:25:36,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 16:25:36,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 16:25:36,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 16:25:36,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 16:25:36,346 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 16:25:36,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-05 16:25:36,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74bfba2ec/13956946ce294f5fb385c7d82ab45ccc/FLAG9d51e83fb [2021-11-05 16:25:37,073 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 16:25:37,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-05 16:25:37,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74bfba2ec/13956946ce294f5fb385c7d82ab45ccc/FLAG9d51e83fb [2021-11-05 16:25:37,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74bfba2ec/13956946ce294f5fb385c7d82ab45ccc [2021-11-05 16:25:37,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 16:25:37,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 16:25:37,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 16:25:37,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 16:25:37,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 16:25:37,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:25:37" (1/1) ... [2021-11-05 16:25:37,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697e604b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:37, skipping insertion in model container [2021-11-05 16:25:37,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:25:37" (1/1) ... [2021-11-05 16:25:37,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 16:25:37,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 16:25:38,088 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-05 16:25:38,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:25:38,300 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 16:25:38,437 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-05 16:25:38,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:25:38,516 INFO L208 MainTranslator]: Completed translation [2021-11-05 16:25:38,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38 WrapperNode [2021-11-05 16:25:38,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 16:25:38,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 16:25:38,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 16:25:38,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 16:25:38,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 16:25:38,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 16:25:38,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 16:25:38,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 16:25:38,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 16:25:38,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 16:25:38,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 16:25:38,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 16:25:38,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (1/1) ... [2021-11-05 16:25:38,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:25:38,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:25:38,752 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) [2021-11-05 16:25:38,770 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 [2021-11-05 16:25:38,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-05 16:25:38,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 16:25:38,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 16:25:38,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 16:25:38,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 16:25:38,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 16:25:38,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 16:25:38,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 16:25:38,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 16:25:38,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 16:25:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 16:25:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 16:25:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-05 16:25:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 16:25:38,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 16:25:39,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 16:25:39,677 INFO L299 CfgBuilder]: Removed 109 assume(true) statements. [2021-11-05 16:25:39,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:25:39 BoogieIcfgContainer [2021-11-05 16:25:39,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 16:25:39,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 16:25:39,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 16:25:39,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 16:25:39,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 04:25:37" (1/3) ... [2021-11-05 16:25:39,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65cbdec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:25:39, skipping insertion in model container [2021-11-05 16:25:39,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:25:38" (2/3) ... [2021-11-05 16:25:39,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65cbdec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:25:39, skipping insertion in model container [2021-11-05 16:25:39,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:25:39" (3/3) ... [2021-11-05 16:25:39,723 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-05 16:25:39,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 16:25:39,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-05 16:25:39,830 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 16:25:39,848 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 [2021-11-05 16:25:39,848 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-05 16:25:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-05 16:25:39,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:39,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:25:39,885 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash -695882203, now seen corresponding path program 1 times [2021-11-05 16:25:39,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:39,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673407800] [2021-11-05 16:25:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:39,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:25:40,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:40,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673407800] [2021-11-05 16:25:40,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673407800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:40,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:40,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:25:40,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975809202] [2021-11-05 16:25:40,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:40,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:25:40,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:40,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:25:40,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:25:40,186 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:40,279 INFO L93 Difference]: Finished difference Result 365 states and 550 transitions. [2021-11-05 16:25:40,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:25:40,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-05 16:25:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:40,291 INFO L225 Difference]: With dead ends: 365 [2021-11-05 16:25:40,291 INFO L226 Difference]: Without dead ends: 224 [2021-11-05 16:25:40,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.08ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:25:40,297 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 145 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.10ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.49ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:40,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 351 Invalid, 15 Unknown, 0 Unchecked, 8.10ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 25.49ms Time] [2021-11-05 16:25:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-05 16:25:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-11-05 16:25:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.399103139013453) internal successors, (312), 223 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 312 transitions. [2021-11-05 16:25:40,340 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 312 transitions. Word has length 18 [2021-11-05 16:25:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:40,340 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 312 transitions. [2021-11-05 16:25:40,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 312 transitions. [2021-11-05 16:25:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-05 16:25:40,342 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:40,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:25:40,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 16:25:40,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:40,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1030357496, now seen corresponding path program 1 times [2021-11-05 16:25:40,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:40,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247646969] [2021-11-05 16:25:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:40,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:25:40,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:40,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247646969] [2021-11-05 16:25:40,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247646969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:40,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:40,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:25:40,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389973042] [2021-11-05 16:25:40,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:40,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:25:40,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:40,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:25:40,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:25:40,419 INFO L87 Difference]: Start difference. First operand 224 states and 312 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:40,451 INFO L93 Difference]: Finished difference Result 442 states and 618 transitions. [2021-11-05 16:25:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:25:40,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-05 16:25:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:40,459 INFO L225 Difference]: With dead ends: 442 [2021-11-05 16:25:40,459 INFO L226 Difference]: Without dead ends: 228 [2021-11-05 16:25:40,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.91ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:25:40,461 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 4 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.07ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:40,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 346 Invalid, 9 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 9.07ms Time] [2021-11-05 16:25:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-05 16:25:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2021-11-05 16:25:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.3973214285714286) internal successors, (313), 224 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 313 transitions. [2021-11-05 16:25:40,475 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 313 transitions. Word has length 24 [2021-11-05 16:25:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:40,476 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 313 transitions. [2021-11-05 16:25:40,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 313 transitions. [2021-11-05 16:25:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-05 16:25:40,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:40,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:25:40,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 16:25:40,485 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:40,486 INFO L85 PathProgramCache]: Analyzing trace with hash 801577585, now seen corresponding path program 1 times [2021-11-05 16:25:40,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:40,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531911620] [2021-11-05 16:25:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:40,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:25:40,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:40,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531911620] [2021-11-05 16:25:40,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531911620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:25:40,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666115722] [2021-11-05 16:25:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:40,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:25:40,549 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) [2021-11-05 16:25:40,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 16:25:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:25:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:25:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:25:40,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:25:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:25:40,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666115722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:25:40,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:25:40,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-05 16:25:40,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266348702] [2021-11-05 16:25:40,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:25:40,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 16:25:40,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 16:25:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:25:40,973 INFO L87 Difference]: Start difference. First operand 225 states and 313 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:41,012 INFO L93 Difference]: Finished difference Result 452 states and 632 transitions. [2021-11-05 16:25:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 16:25:41,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-05 16:25:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:41,014 INFO L225 Difference]: With dead ends: 452 [2021-11-05 16:25:41,014 INFO L226 Difference]: Without dead ends: 237 [2021-11-05 16:25:41,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.08ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:25:41,023 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 27 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.01ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.88ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:41,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 348 Invalid, 23 Unknown, 0 Unchecked, 3.01ms Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 22.88ms Time] [2021-11-05 16:25:41,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-05 16:25:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-11-05 16:25:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.3898305084745763) internal successors, (328), 236 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 328 transitions. [2021-11-05 16:25:41,042 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 328 transitions. Word has length 28 [2021-11-05 16:25:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:41,042 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 328 transitions. [2021-11-05 16:25:41,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 328 transitions. [2021-11-05 16:25:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-05 16:25:41,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:41,048 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:25:41,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-05 16:25:41,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:41,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:41,264 INFO L85 PathProgramCache]: Analyzing trace with hash 470157532, now seen corresponding path program 2 times [2021-11-05 16:25:41,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:41,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424692693] [2021-11-05 16:25:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:41,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-05 16:25:41,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:41,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424692693] [2021-11-05 16:25:41,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424692693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:41,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:41,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:25:41,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045894258] [2021-11-05 16:25:41,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:41,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:25:41,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:25:41,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:25:41,324 INFO L87 Difference]: Start difference. First operand 237 states and 328 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:41,349 INFO L93 Difference]: Finished difference Result 463 states and 642 transitions. [2021-11-05 16:25:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:25:41,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-05 16:25:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:41,351 INFO L225 Difference]: With dead ends: 463 [2021-11-05 16:25:41,351 INFO L226 Difference]: Without dead ends: 236 [2021-11-05 16:25:41,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.19ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:25:41,352 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 327 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.66ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:41,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 456 Invalid, 8 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 8.66ms Time] [2021-11-05 16:25:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-05 16:25:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-11-05 16:25:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.3787234042553191) internal successors, (324), 235 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 324 transitions. [2021-11-05 16:25:41,375 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 324 transitions. Word has length 40 [2021-11-05 16:25:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:41,376 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 324 transitions. [2021-11-05 16:25:41,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 324 transitions. [2021-11-05 16:25:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-05 16:25:41,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:41,377 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-05 16:25:41,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 16:25:41,378 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash -739730167, now seen corresponding path program 1 times [2021-11-05 16:25:41,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:41,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317308994] [2021-11-05 16:25:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:41,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-05 16:25:41,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:41,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317308994] [2021-11-05 16:25:41,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317308994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:41,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:41,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 16:25:41,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648400096] [2021-11-05 16:25:41,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:41,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:25:41,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:41,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:25:41,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:25:41,505 INFO L87 Difference]: Start difference. First operand 236 states and 324 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:41,567 INFO L93 Difference]: Finished difference Result 686 states and 947 transitions. [2021-11-05 16:25:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:25:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 51 [2021-11-05 16:25:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:41,572 INFO L225 Difference]: With dead ends: 686 [2021-11-05 16:25:41,572 INFO L226 Difference]: Without dead ends: 456 [2021-11-05 16:25:41,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.96ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:25:41,574 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 143 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.11ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.22ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:41,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 654 Invalid, 43 Unknown, 0 Unchecked, 1.11ms Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 38.22ms Time] [2021-11-05 16:25:41,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-05 16:25:41,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 448. [2021-11-05 16:25:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.3825503355704698) internal successors, (618), 447 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 618 transitions. [2021-11-05 16:25:41,599 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 618 transitions. Word has length 51 [2021-11-05 16:25:41,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:41,600 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 618 transitions. [2021-11-05 16:25:41,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,601 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 618 transitions. [2021-11-05 16:25:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-05 16:25:41,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:41,605 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-05 16:25:41,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 16:25:41,606 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:41,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1388265716, now seen corresponding path program 1 times [2021-11-05 16:25:41,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:41,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143305260] [2021-11-05 16:25:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:41,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-05 16:25:41,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:41,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143305260] [2021-11-05 16:25:41,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143305260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:41,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:41,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:25:41,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737920190] [2021-11-05 16:25:41,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:41,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:25:41,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:41,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:25:41,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:25:41,693 INFO L87 Difference]: Start difference. First operand 448 states and 618 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:41,720 INFO L93 Difference]: Finished difference Result 789 states and 1084 transitions. [2021-11-05 16:25:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:25:41,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-05 16:25:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:41,723 INFO L225 Difference]: With dead ends: 789 [2021-11-05 16:25:41,723 INFO L226 Difference]: Without dead ends: 351 [2021-11-05 16:25:41,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.38ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:25:41,725 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 43 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.02ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.39ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:41,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 335 Invalid, 14 Unknown, 0 Unchecked, 1.02ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 14.39ms Time] [2021-11-05 16:25:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-05 16:25:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 303. [2021-11-05 16:25:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.3774834437086092) internal successors, (416), 302 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 416 transitions. [2021-11-05 16:25:41,736 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 416 transitions. Word has length 76 [2021-11-05 16:25:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:41,736 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 416 transitions. [2021-11-05 16:25:41,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 416 transitions. [2021-11-05 16:25:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-05 16:25:41,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:41,739 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-05 16:25:41,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 16:25:41,739 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:41,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash -349680290, now seen corresponding path program 2 times [2021-11-05 16:25:41,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:41,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873617247] [2021-11-05 16:25:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:41,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-05 16:25:41,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:41,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873617247] [2021-11-05 16:25:41,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873617247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:41,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:41,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:25:41,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898308104] [2021-11-05 16:25:41,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:41,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:25:41,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:25:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:25:41,860 INFO L87 Difference]: Start difference. First operand 303 states and 416 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:41,928 INFO L93 Difference]: Finished difference Result 1262 states and 1746 transitions. [2021-11-05 16:25:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:25:41,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-05 16:25:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:41,933 INFO L225 Difference]: With dead ends: 1262 [2021-11-05 16:25:41,933 INFO L226 Difference]: Without dead ends: 982 [2021-11-05 16:25:41,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.43ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:25:41,935 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 429 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.15ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:41,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 678 Invalid, 37 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 28.15ms Time] [2021-11-05 16:25:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-11-05 16:25:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 307. [2021-11-05 16:25:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.3725490196078431) internal successors, (420), 306 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 420 transitions. [2021-11-05 16:25:41,953 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 420 transitions. Word has length 76 [2021-11-05 16:25:41,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:41,955 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 420 transitions. [2021-11-05 16:25:41,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 420 transitions. [2021-11-05 16:25:41,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-05 16:25:41,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:41,964 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-05 16:25:41,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-05 16:25:41,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1490562227, now seen corresponding path program 1 times [2021-11-05 16:25:41,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:41,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997004480] [2021-11-05 16:25:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:41,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-05 16:25:42,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:42,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997004480] [2021-11-05 16:25:42,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997004480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:42,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:42,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-05 16:25:42,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709256650] [2021-11-05 16:25:42,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:42,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 16:25:42,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 16:25:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:25:42,089 INFO L87 Difference]: Start difference. First operand 307 states and 420 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:42,419 INFO L93 Difference]: Finished difference Result 1430 states and 1978 transitions. [2021-11-05 16:25:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-05 16:25:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-05 16:25:42,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:42,425 INFO L225 Difference]: With dead ends: 1430 [2021-11-05 16:25:42,426 INFO L226 Difference]: Without dead ends: 1146 [2021-11-05 16:25:42,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 142.29ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-11-05 16:25:42,428 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 1320 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 2680 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.83ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.35ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:42,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1320 Valid, 2680 Invalid, 255 Unknown, 0 Unchecked, 6.83ms Time], IncrementalHoareTripleChecker [17 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 129.35ms Time] [2021-11-05 16:25:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-05 16:25:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 311. [2021-11-05 16:25:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.367741935483871) internal successors, (424), 310 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 424 transitions. [2021-11-05 16:25:42,453 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 424 transitions. Word has length 79 [2021-11-05 16:25:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:42,453 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 424 transitions. [2021-11-05 16:25:42,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:42,453 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 424 transitions. [2021-11-05 16:25:42,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-05 16:25:42,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:42,455 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-05 16:25:42,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-05 16:25:42,455 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:42,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -424921966, now seen corresponding path program 1 times [2021-11-05 16:25:42,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:42,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309617118] [2021-11-05 16:25:42,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:42,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:25:42,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:42,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309617118] [2021-11-05 16:25:42,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309617118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:25:42,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582652108] [2021-11-05 16:25:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:42,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:42,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:25:42,556 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) [2021-11-05 16:25:42,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 16:25:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:42,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-05 16:25:42,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:25:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:25:42,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:25:43,101 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:25:43,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582652108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:25:43,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:25:43,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-05 16:25:43,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875951969] [2021-11-05 16:25:43,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:25:43,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-05 16:25:43,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:43,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-05 16:25:43,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-05 16:25:43,103 INFO L87 Difference]: Start difference. First operand 311 states and 424 transitions. Second operand has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:43,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:43,178 INFO L93 Difference]: Finished difference Result 647 states and 891 transitions. [2021-11-05 16:25:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-05 16:25:43,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-05 16:25:43,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:43,180 INFO L225 Difference]: With dead ends: 647 [2021-11-05 16:25:43,180 INFO L226 Difference]: Without dead ends: 359 [2021-11-05 16:25:43,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.98ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-05 16:25:43,183 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 65 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.03ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:43,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 857 Invalid, 54 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 43.03ms Time] [2021-11-05 16:25:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-05 16:25:43,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2021-11-05 16:25:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.3519553072625698) internal successors, (484), 358 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 484 transitions. [2021-11-05 16:25:43,207 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 484 transitions. Word has length 81 [2021-11-05 16:25:43,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:43,207 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 484 transitions. [2021-11-05 16:25:43,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.923076923076923) internal successors, (103), 13 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 484 transitions. [2021-11-05 16:25:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-05 16:25:43,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:43,213 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:25:43,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-05 16:25:43,429 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,SelfDestructingSolverStorable8 [2021-11-05 16:25:43,429 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:43,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:43,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1135564292, now seen corresponding path program 2 times [2021-11-05 16:25:43,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:43,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057762256] [2021-11-05 16:25:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:43,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:25:43,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:43,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057762256] [2021-11-05 16:25:43,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057762256] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:25:43,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934745622] [2021-11-05 16:25:43,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:25:43,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:43,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:25:43,574 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) [2021-11-05 16:25:43,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-05 16:25:43,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-05 16:25:43,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:25:43,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-05 16:25:43,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:25:43,962 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-05 16:25:43,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:25:43,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934745622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:43,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:25:43,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2021-11-05 16:25:43,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404993494] [2021-11-05 16:25:43,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:43,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:25:43,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:25:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-05 16:25:43,965 INFO L87 Difference]: Start difference. First operand 359 states and 484 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:43,987 INFO L93 Difference]: Finished difference Result 710 states and 959 transitions. [2021-11-05 16:25:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:25:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-11-05 16:25:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:43,990 INFO L225 Difference]: With dead ends: 710 [2021-11-05 16:25:43,990 INFO L226 Difference]: Without dead ends: 360 [2021-11-05 16:25:43,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.22ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-05 16:25:43,991 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 0 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.54ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:43,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 348 Invalid, 3 Unknown, 0 Unchecked, 0.49ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.54ms Time] [2021-11-05 16:25:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-05 16:25:44,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-05 16:25:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.350974930362117) internal successors, (485), 359 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 485 transitions. [2021-11-05 16:25:44,029 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 485 transitions. Word has length 105 [2021-11-05 16:25:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:44,029 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 485 transitions. [2021-11-05 16:25:44,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 485 transitions. [2021-11-05 16:25:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-05 16:25:44,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:44,031 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:25:44,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-05 16:25:44,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:44,252 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:44,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:44,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1003472491, now seen corresponding path program 1 times [2021-11-05 16:25:44,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:44,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624177849] [2021-11-05 16:25:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:44,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:44,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:44,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624177849] [2021-11-05 16:25:44,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624177849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:25:44,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212123345] [2021-11-05 16:25:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:44,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:44,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:25:44,446 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) [2021-11-05 16:25:44,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-05 16:25:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:44,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-05 16:25:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:25:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:44,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:25:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:45,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212123345] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:25:45,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:25:45,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-11-05 16:25:45,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052115038] [2021-11-05 16:25:45,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:25:45,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-05 16:25:45,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:45,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-05 16:25:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-05 16:25:45,272 INFO L87 Difference]: Start difference. First operand 360 states and 485 transitions. Second operand has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 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) [2021-11-05 16:25:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:45,433 INFO L93 Difference]: Finished difference Result 792 states and 1084 transitions. [2021-11-05 16:25:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-05 16:25:45,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 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 106 [2021-11-05 16:25:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:45,436 INFO L225 Difference]: With dead ends: 792 [2021-11-05 16:25:45,436 INFO L226 Difference]: Without dead ends: 456 [2021-11-05 16:25:45,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 223.17ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-05 16:25:45,437 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 156 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.29ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:45,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 870 Invalid, 113 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [16 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 104.29ms Time] [2021-11-05 16:25:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-05 16:25:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2021-11-05 16:25:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3296703296703296) internal successors, (605), 455 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 605 transitions. [2021-11-05 16:25:45,464 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 605 transitions. Word has length 106 [2021-11-05 16:25:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:45,464 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 605 transitions. [2021-11-05 16:25:45,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 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) [2021-11-05 16:25:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 605 transitions. [2021-11-05 16:25:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-05 16:25:45,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:45,466 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 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] [2021-11-05 16:25:45,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-05 16:25:45,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:45,692 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1540940481, now seen corresponding path program 2 times [2021-11-05 16:25:45,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:45,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966447214] [2021-11-05 16:25:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:45,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:46,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:46,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966447214] [2021-11-05 16:25:46,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966447214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:25:46,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281247254] [2021-11-05 16:25:46,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:25:46,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:46,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:25:46,088 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) [2021-11-05 16:25:46,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-05 16:25:46,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 16:25:46,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:25:46,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-05 16:25:46,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:25:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:46,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:25:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:47,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281247254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:25:47,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:25:47,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-11-05 16:25:47,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155352020] [2021-11-05 16:25:47,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:25:47,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-05 16:25:47,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:47,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-05 16:25:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-05 16:25:47,584 INFO L87 Difference]: Start difference. First operand 456 states and 605 transitions. Second operand has 49 states, 49 states have (on average 5.061224489795919) internal successors, (248), 49 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:47,879 INFO L93 Difference]: Finished difference Result 1080 states and 1468 transitions. [2021-11-05 16:25:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-05 16:25:47,879 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.061224489795919) internal successors, (248), 49 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-11-05 16:25:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:47,882 INFO L225 Difference]: With dead ends: 1080 [2021-11-05 16:25:47,882 INFO L226 Difference]: Without dead ends: 648 [2021-11-05 16:25:47,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 807.60ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-05 16:25:47,885 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 428 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 145.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 181.44ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:47,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 725 Invalid, 224 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [32 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 181.44ms Time] [2021-11-05 16:25:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-05 16:25:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2021-11-05 16:25:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.3060278207109737) internal successors, (845), 647 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 845 transitions. [2021-11-05 16:25:47,947 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 845 transitions. Word has length 154 [2021-11-05 16:25:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:47,948 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 845 transitions. [2021-11-05 16:25:47,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.061224489795919) internal successors, (248), 49 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 845 transitions. [2021-11-05 16:25:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-05 16:25:47,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:47,951 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 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] [2021-11-05 16:25:47,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-05 16:25:48,167 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,SelfDestructingSolverStorable11 [2021-11-05 16:25:48,168 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:48,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1572102887, now seen corresponding path program 3 times [2021-11-05 16:25:48,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:48,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421910764] [2021-11-05 16:25:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:48,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:49,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:49,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421910764] [2021-11-05 16:25:49,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421910764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:25:49,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431751223] [2021-11-05 16:25:49,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-05 16:25:49,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:25:49,309 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) [2021-11-05 16:25:49,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-05 16:25:49,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-05 16:25:49,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:25:49,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-05 16:25:49,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:25:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-05 16:25:50,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:25:50,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431751223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:50,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:25:50,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [49] total 58 [2021-11-05 16:25:50,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57383760] [2021-11-05 16:25:50,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:50,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-05 16:25:50,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:50,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-05 16:25:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1194, Invalid=2112, Unknown=0, NotChecked=0, Total=3306 [2021-11-05 16:25:50,302 INFO L87 Difference]: Start difference. First operand 648 states and 845 transitions. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:52,150 INFO L93 Difference]: Finished difference Result 3906 states and 5096 transitions. [2021-11-05 16:25:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-05 16:25:52,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 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 250 [2021-11-05 16:25:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:52,162 INFO L225 Difference]: With dead ends: 3906 [2021-11-05 16:25:52,162 INFO L226 Difference]: Without dead ends: 3282 [2021-11-05 16:25:52,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 2493.61ms TimeCoverageRelationStatistics Valid=1395, Invalid=4155, Unknown=0, NotChecked=0, Total=5550 [2021-11-05 16:25:52,167 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 2635 mSDsluCounter, 2211 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 172.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2635 SdHoareTripleChecker+Valid, 2578 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.78ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.57ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:52,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2635 Valid, 2578 Invalid, 266 Unknown, 0 Unchecked, 8.78ms Time], IncrementalHoareTripleChecker [13 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 202.57ms Time] [2021-11-05 16:25:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-11-05 16:25:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 662. [2021-11-05 16:25:52,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.2995461422087746) internal successors, (859), 661 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 859 transitions. [2021-11-05 16:25:52,242 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 859 transitions. Word has length 250 [2021-11-05 16:25:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:52,242 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 859 transitions. [2021-11-05 16:25:52,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 859 transitions. [2021-11-05 16:25:52,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-05 16:25:52,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:52,246 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:25:52,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-05 16:25:52,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:52,459 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2029983850, now seen corresponding path program 1 times [2021-11-05 16:25:52,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:52,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438431502] [2021-11-05 16:25:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:52,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-05 16:25:52,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:52,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438431502] [2021-11-05 16:25:52,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438431502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:52,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:52,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:25:52,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766811334] [2021-11-05 16:25:52,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:52,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:25:52,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:52,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:25:52,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:25:52,610 INFO L87 Difference]: Start difference. First operand 662 states and 859 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:52,733 INFO L93 Difference]: Finished difference Result 1609 states and 2089 transitions. [2021-11-05 16:25:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:25:52,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-11-05 16:25:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:52,738 INFO L225 Difference]: With dead ends: 1609 [2021-11-05 16:25:52,738 INFO L226 Difference]: Without dead ends: 1285 [2021-11-05 16:25:52,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.48ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:25:52,740 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 154 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.05ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:52,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 490 Invalid, 4 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.05ms Time] [2021-11-05 16:25:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-11-05 16:25:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 664. [2021-11-05 16:25:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.2986425339366516) internal successors, (861), 663 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 861 transitions. [2021-11-05 16:25:52,808 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 861 transitions. Word has length 259 [2021-11-05 16:25:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:52,808 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 861 transitions. [2021-11-05 16:25:52,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 861 transitions. [2021-11-05 16:25:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-05 16:25:52,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:52,812 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:25:52,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-05 16:25:52,812 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:52,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1596267351, now seen corresponding path program 1 times [2021-11-05 16:25:52,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:52,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832978188] [2021-11-05 16:25:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:52,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4189 trivial. 0 not checked. [2021-11-05 16:25:52,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:52,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832978188] [2021-11-05 16:25:52,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832978188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:25:52,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:25:52,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:25:52,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163483747] [2021-11-05 16:25:52,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:25:52,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:25:52,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:25:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:25:52,989 INFO L87 Difference]: Start difference. First operand 664 states and 861 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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) [2021-11-05 16:25:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:53,099 INFO L93 Difference]: Finished difference Result 1607 states and 2084 transitions. [2021-11-05 16:25:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:25:53,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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 261 [2021-11-05 16:25:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:53,103 INFO L225 Difference]: With dead ends: 1607 [2021-11-05 16:25:53,103 INFO L226 Difference]: Without dead ends: 967 [2021-11-05 16:25:53,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.79ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:25:53,104 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 248 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.31ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.12ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:53,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 612 Invalid, 23 Unknown, 0 Unchecked, 1.31ms Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 18.12ms Time] [2021-11-05 16:25:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-05 16:25:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 661. [2021-11-05 16:25:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 1.2954545454545454) internal successors, (855), 660 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 855 transitions. [2021-11-05 16:25:53,169 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 855 transitions. Word has length 261 [2021-11-05 16:25:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:53,169 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 855 transitions. [2021-11-05 16:25:53,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 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) [2021-11-05 16:25:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 855 transitions. [2021-11-05 16:25:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-05 16:25:53,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:53,172 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 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] [2021-11-05 16:25:53,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-05 16:25:53,172 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash 767342937, now seen corresponding path program 1 times [2021-11-05 16:25:53,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:53,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075359282] [2021-11-05 16:25:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:53,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:54,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:25:54,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075359282] [2021-11-05 16:25:54,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075359282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:25:54,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408559984] [2021-11-05 16:25:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:54,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:54,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:25:54,203 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) [2021-11-05 16:25:54,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-05 16:25:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:25:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-05 16:25:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:25:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:55,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:25:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4196 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:25:57,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408559984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:25:57,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:25:57,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-11-05 16:25:57,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416474068] [2021-11-05 16:25:57,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:25:57,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-05 16:25:57,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:25:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-05 16:25:57,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-05 16:25:57,545 INFO L87 Difference]: Start difference. First operand 661 states and 855 transitions. Second operand has 97 states, 97 states have (on average 4.690721649484536) internal successors, (455), 97 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:25:58,481 INFO L93 Difference]: Finished difference Result 1682 states and 2256 transitions. [2021-11-05 16:25:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-05 16:25:58,482 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.690721649484536) internal successors, (455), 97 states have internal predecessors, (455), 0 states have call successors, (0), 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 265 [2021-11-05 16:25:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:25:58,486 INFO L225 Difference]: With dead ends: 1682 [2021-11-05 16:25:58,487 INFO L226 Difference]: Without dead ends: 1045 [2021-11-05 16:25:58,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2807.90ms TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-05 16:25:58,491 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 653 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 262.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.81ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 354.81ms IncrementalHoareTripleChecker+Time [2021-11-05 16:25:58,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 773 Invalid, 437 Unknown, 0 Unchecked, 3.81ms Time], IncrementalHoareTripleChecker [53 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 354.81ms Time] [2021-11-05 16:25:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-11-05 16:25:58,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 1045. [2021-11-05 16:25:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 1.278735632183908) internal successors, (1335), 1044 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1335 transitions. [2021-11-05 16:25:58,630 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1335 transitions. Word has length 265 [2021-11-05 16:25:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:25:58,631 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1335 transitions. [2021-11-05 16:25:58,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.690721649484536) internal successors, (455), 97 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:25:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1335 transitions. [2021-11-05 16:25:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2021-11-05 16:25:58,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:25:58,638 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 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] [2021-11-05 16:25:58,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-05 16:25:58,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:25:58,864 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:25:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:25:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1311360009, now seen corresponding path program 2 times [2021-11-05 16:25:58,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:25:58,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670656767] [2021-11-05 16:25:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:25:58,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:25:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:26:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17588 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:26:01,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:26:01,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670656767] [2021-11-05 16:26:01,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670656767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:26:01,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019613395] [2021-11-05 16:26:01,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:26:01,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:26:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:26:01,988 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:26:01,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-05 16:26:02,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 16:26:02,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:26:02,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1816 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-05 16:26:02,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:26:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17588 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:26:03,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:26:11,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17588 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:26:11,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019613395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:26:11,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:26:11,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-11-05 16:26:11,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345930807] [2021-11-05 16:26:11,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:26:11,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-05 16:26:11,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:26:11,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-05 16:26:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-11-05 16:26:11,768 INFO L87 Difference]: Start difference. First operand 1045 states and 1335 transitions. Second operand has 193 states, 193 states have (on average 4.347150259067358) internal successors, (839), 193 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:26:16,250 INFO L93 Difference]: Finished difference Result 2834 states and 3792 transitions. [2021-11-05 16:26:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-05 16:26:16,251 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.347150259067358) internal successors, (839), 193 states have internal predecessors, (839), 0 states have call successors, (0), 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 457 [2021-11-05 16:26:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:26:16,257 INFO L225 Difference]: With dead ends: 2834 [2021-11-05 16:26:16,257 INFO L226 Difference]: Without dead ends: 1813 [2021-11-05 16:26:16,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 10418.11ms TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-11-05 16:26:16,261 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 1569 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 509.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.03ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 664.79ms IncrementalHoareTripleChecker+Time [2021-11-05 16:26:16,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1569 Valid, 1037 Invalid, 864 Unknown, 0 Unchecked, 6.03ms Time], IncrementalHoareTripleChecker [99 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 664.79ms Time] [2021-11-05 16:26:16,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-11-05 16:26:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1813. [2021-11-05 16:26:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 1.2665562913907285) internal successors, (2295), 1812 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:16,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2295 transitions. [2021-11-05 16:26:16,457 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2295 transitions. Word has length 457 [2021-11-05 16:26:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:26:16,457 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2295 transitions. [2021-11-05 16:26:16,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.347150259067358) internal successors, (839), 193 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2295 transitions. [2021-11-05 16:26:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2021-11-05 16:26:16,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:26:16,478 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 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] [2021-11-05 16:26:16,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-05 16:26:16,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-05 16:26:16,702 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:26:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:26:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash -538289815, now seen corresponding path program 3 times [2021-11-05 16:26:16,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:26:16,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764894700] [2021-11-05 16:26:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:26:16,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:26:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:26:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 72020 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:26:28,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:26:28,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764894700] [2021-11-05 16:26:28,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764894700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:26:28,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974157729] [2021-11-05 16:26:28,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-05 16:26:28,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:26:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:26:28,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:26:28,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-05 16:26:28,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-05 16:26:28,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:26:28,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:26:28,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:26:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 72020 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-05 16:26:30,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:26:30,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974157729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:26:30,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:26:30,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [193] total 196 [2021-11-05 16:26:30,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306015919] [2021-11-05 16:26:30,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:26:30,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:26:30,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:26:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:26:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-05 16:26:30,464 INFO L87 Difference]: Start difference. First operand 1813 states and 2295 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:26:30,868 INFO L93 Difference]: Finished difference Result 5412 states and 6857 transitions. [2021-11-05 16:26:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:26:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 841 [2021-11-05 16:26:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:26:30,886 INFO L225 Difference]: With dead ends: 5412 [2021-11-05 16:26:30,886 INFO L226 Difference]: Without dead ends: 4511 [2021-11-05 16:26:30,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 10933.70ms TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2021-11-05 16:26:30,912 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 548 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.58ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.36ms IncrementalHoareTripleChecker+Time [2021-11-05 16:26:30,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 806 Invalid, 59 Unknown, 0 Unchecked, 3.58ms Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 40.36ms Time] [2021-11-05 16:26:30,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-11-05 16:26:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3600. [2021-11-05 16:26:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3600 states, 3599 states have (on average 1.2681300361211447) internal successors, (4564), 3599 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3600 states to 3600 states and 4564 transitions. [2021-11-05 16:26:31,242 INFO L78 Accepts]: Start accepts. Automaton has 3600 states and 4564 transitions. Word has length 841 [2021-11-05 16:26:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:26:31,243 INFO L470 AbstractCegarLoop]: Abstraction has 3600 states and 4564 transitions. [2021-11-05 16:26:31,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3600 states and 4564 transitions. [2021-11-05 16:26:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2021-11-05 16:26:31,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:26:31,251 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 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] [2021-11-05 16:26:31,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-05 16:26:31,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-05 16:26:31,475 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:26:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:26:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2024477174, now seen corresponding path program 1 times [2021-11-05 16:26:31,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:26:31,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003283490] [2021-11-05 16:26:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:26:31,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:26:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:26:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 72020 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72013 trivial. 0 not checked. [2021-11-05 16:26:31,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:26:31,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003283490] [2021-11-05 16:26:31,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003283490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:26:31,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:26:31,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:26:31,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188572004] [2021-11-05 16:26:31,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:26:31,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:26:31,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:26:31,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:26:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:26:31,896 INFO L87 Difference]: Start difference. First operand 3600 states and 4564 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:26:32,656 INFO L93 Difference]: Finished difference Result 10799 states and 13697 transitions. [2021-11-05 16:26:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:26:32,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 843 [2021-11-05 16:26:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:26:32,692 INFO L225 Difference]: With dead ends: 10799 [2021-11-05 16:26:32,692 INFO L226 Difference]: Without dead ends: 8111 [2021-11-05 16:26:32,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.15ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:26:32,699 INFO L933 BasicCegarLoop]: 469 mSDtfsCounter, 308 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.96ms IncrementalHoareTripleChecker+Time [2021-11-05 16:26:32,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1100 Invalid, 26 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 15.96ms Time] [2021-11-05 16:26:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8111 states. [2021-11-05 16:26:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8111 to 3612. [2021-11-05 16:26:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 1.2686236499584602) internal successors, (4581), 3611 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 4581 transitions. [2021-11-05 16:26:33,184 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 4581 transitions. Word has length 843 [2021-11-05 16:26:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:26:33,185 INFO L470 AbstractCegarLoop]: Abstraction has 3612 states and 4581 transitions. [2021-11-05 16:26:33,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:26:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 4581 transitions. [2021-11-05 16:26:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2021-11-05 16:26:33,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:26:33,194 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 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] [2021-11-05 16:26:33,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-05 16:26:33,195 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:26:33,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:26:33,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1103618193, now seen corresponding path program 1 times [2021-11-05 16:26:33,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:26:33,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241736382] [2021-11-05 16:26:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:26:33,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:26:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:26:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 72022 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-05 16:26:44,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:26:44,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241736382] [2021-11-05 16:26:44,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241736382] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:26:44,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446837876] [2021-11-05 16:26:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:26:44,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:26:44,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:26:44,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:26:44,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-05 16:26:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:26:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 2977 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-05 16:26:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:26:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 72022 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-05 16:26:46,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:26:56,299 INFO L134 CoverageAnalysis]: Checked inductivity of 72022 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-05 16:26:56,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446837876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:26:56,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:26:56,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 259 [2021-11-05 16:26:56,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323640018] [2021-11-05 16:26:56,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:26:56,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2021-11-05 16:26:56,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:26:56,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2021-11-05 16:26:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33411, Invalid=33411, Unknown=0, NotChecked=0, Total=66822 [2021-11-05 16:26:56,313 INFO L87 Difference]: Start difference. First operand 3612 states and 4581 transitions. Second operand has 259 states, 259 states have (on average 4.285714285714286) internal successors, (1110), 259 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:08,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:27:08,818 INFO L93 Difference]: Finished difference Result 8256 states and 10716 transitions. [2021-11-05 16:27:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2021-11-05 16:27:08,819 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 259 states have (on average 4.285714285714286) internal successors, (1110), 259 states have internal predecessors, (1110), 0 states have call successors, (0), 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 845 [2021-11-05 16:27:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:27:08,828 INFO L225 Difference]: With dead ends: 8256 [2021-11-05 16:27:08,828 INFO L226 Difference]: Without dead ends: 4668 [2021-11-05 16:27:08,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1881 GetRequests, 1624 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 18679.61ms TimeCoverageRelationStatistics Valid=33411, Invalid=33411, Unknown=0, NotChecked=0, Total=66822 [2021-11-05 16:27:08,837 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 2181 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 662.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2181 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.40ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 835.60ms IncrementalHoareTripleChecker+Time [2021-11-05 16:27:08,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2181 Valid, 1104 Invalid, 1039 Unknown, 0 Unchecked, 6.40ms Time], IncrementalHoareTripleChecker [6 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 835.60ms Time] [2021-11-05 16:27:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-11-05 16:27:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4668. [2021-11-05 16:27:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 1.2644096850224984) internal successors, (5901), 4667 states have internal predecessors, (5901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 5901 transitions. [2021-11-05 16:27:09,377 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 5901 transitions. Word has length 845 [2021-11-05 16:27:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:27:09,378 INFO L470 AbstractCegarLoop]: Abstraction has 4668 states and 5901 transitions. [2021-11-05 16:27:09,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 259 states have (on average 4.285714285714286) internal successors, (1110), 259 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 5901 transitions. [2021-11-05 16:27:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1110 [2021-11-05 16:27:09,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:27:09,403 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-05 16:27:09,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-05 16:27:09,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:27:09,624 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:27:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:27:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1408722243, now seen corresponding path program 2 times [2021-11-05 16:27:09,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:27:09,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224475137] [2021-11-05 16:27:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:27:09,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:27:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:27:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 130828 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-05 16:27:10,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:27:10,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224475137] [2021-11-05 16:27:10,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224475137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:27:10,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:27:10,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:27:10,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357136588] [2021-11-05 16:27:10,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:27:10,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:27:10,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:27:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:27:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:27:10,565 INFO L87 Difference]: Start difference. First operand 4668 states and 5901 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:27:11,477 INFO L93 Difference]: Finished difference Result 13674 states and 17271 transitions. [2021-11-05 16:27:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:27:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1109 [2021-11-05 16:27:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:27:11,494 INFO L225 Difference]: With dead ends: 13674 [2021-11-05 16:27:11,494 INFO L226 Difference]: Without dead ends: 9030 [2021-11-05 16:27:11,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.40ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:27:11,504 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 113 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.20ms IncrementalHoareTripleChecker+Time [2021-11-05 16:27:11,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 393 Invalid, 3 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 3.20ms Time] [2021-11-05 16:27:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9030 states. [2021-11-05 16:27:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9030 to 4656. [2021-11-05 16:27:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 1.262513426423201) internal successors, (5877), 4655 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 5877 transitions. [2021-11-05 16:27:11,936 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 5877 transitions. Word has length 1109 [2021-11-05 16:27:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:27:11,937 INFO L470 AbstractCegarLoop]: Abstraction has 4656 states and 5877 transitions. [2021-11-05 16:27:11,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 5877 transitions. [2021-11-05 16:27:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1110 [2021-11-05 16:27:11,948 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:27:11,948 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-05 16:27:11,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-05 16:27:11,949 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:27:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:27:11,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1454565699, now seen corresponding path program 1 times [2021-11-05 16:27:11,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:27:11,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812782303] [2021-11-05 16:27:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:27:11,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:27:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:27:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 130828 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-05 16:27:37,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:27:37,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812782303] [2021-11-05 16:27:37,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812782303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:27:37,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:27:37,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:27:37,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143862148] [2021-11-05 16:27:37,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:27:37,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:27:37,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:27:37,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:27:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:27:37,548 INFO L87 Difference]: Start difference. First operand 4656 states and 5877 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:27:38,635 INFO L93 Difference]: Finished difference Result 13666 states and 17251 transitions. [2021-11-05 16:27:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:27:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1109 [2021-11-05 16:27:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:27:38,653 INFO L225 Difference]: With dead ends: 13666 [2021-11-05 16:27:38,653 INFO L226 Difference]: Without dead ends: 9034 [2021-11-05 16:27:38,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.10ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:27:38,661 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 113 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.39ms IncrementalHoareTripleChecker+Time [2021-11-05 16:27:38,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 639 Invalid, 9 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 26.39ms Time] [2021-11-05 16:27:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9034 states. [2021-11-05 16:27:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9034 to 4660. [2021-11-05 16:27:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4660 states, 4659 states have (on average 1.2622880446447735) internal successors, (5881), 4659 states have internal predecessors, (5881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4660 states to 4660 states and 5881 transitions. [2021-11-05 16:27:39,129 INFO L78 Accepts]: Start accepts. Automaton has 4660 states and 5881 transitions. Word has length 1109 [2021-11-05 16:27:39,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:27:39,130 INFO L470 AbstractCegarLoop]: Abstraction has 4660 states and 5881 transitions. [2021-11-05 16:27:39,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:27:39,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4660 states and 5881 transitions. [2021-11-05 16:27:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1111 [2021-11-05 16:27:39,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:27:39,140 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-05 16:27:39,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-05 16:27:39,141 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:27:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:27:39,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1981019934, now seen corresponding path program 1 times [2021-11-05 16:27:39,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:27:39,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136039676] [2021-11-05 16:27:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:27:39,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:28:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:28:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 130829 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-05 16:28:03,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:28:03,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136039676] [2021-11-05 16:28:03,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136039676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:28:03,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138345556] [2021-11-05 16:28:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:28:03,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:28:03,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:28:03,280 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:28:03,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-05 16:28:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:28:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 3797 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-05 16:28:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:28:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 130829 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-05 16:28:05,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:28:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 130829 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 130821 trivial. 0 not checked. [2021-11-05 16:28:06,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138345556] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-05 16:28:06,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:28:06,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 9 [2021-11-05 16:28:06,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224676622] [2021-11-05 16:28:06,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:28:06,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:28:06,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:28:06,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:28:06,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:28:06,575 INFO L87 Difference]: Start difference. First operand 4660 states and 5881 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) [2021-11-05 16:28:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:28:07,243 INFO L93 Difference]: Finished difference Result 10455 states and 13192 transitions. [2021-11-05 16:28:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:28:07,244 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 1110 [2021-11-05 16:28:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:28:07,253 INFO L225 Difference]: With dead ends: 10455 [2021-11-05 16:28:07,253 INFO L226 Difference]: Without dead ends: 5819 [2021-11-05 16:28:07,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2224 GetRequests, 2217 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.20ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:28:07,260 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 156 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.70ms IncrementalHoareTripleChecker+Time [2021-11-05 16:28:07,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 720 Invalid, 13 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 32.70ms Time] [2021-11-05 16:28:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5819 states. [2021-11-05 16:28:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5819 to 4664. [2021-11-05 16:28:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 1.2620630495389233) internal successors, (5885), 4663 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:28:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 5885 transitions. [2021-11-05 16:28:07,740 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 5885 transitions. Word has length 1110 [2021-11-05 16:28:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:28:07,741 INFO L470 AbstractCegarLoop]: Abstraction has 4664 states and 5885 transitions. [2021-11-05 16:28:07,741 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) [2021-11-05 16:28:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 5885 transitions. [2021-11-05 16:28:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2021-11-05 16:28:07,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:28:07,752 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-05 16:28:07,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-05 16:28:07,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-05 16:28:07,975 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:28:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:28:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2067976475, now seen corresponding path program 1 times [2021-11-05 16:28:07,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:28:07,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589492852] [2021-11-05 16:28:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:28:07,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:28:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:28:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 130830 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130822 trivial. 0 not checked. [2021-11-05 16:28:33,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:28:33,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589492852] [2021-11-05 16:28:33,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589492852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:28:33,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003727410] [2021-11-05 16:28:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:28:33,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:28:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:28:33,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:28:33,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-05 16:34:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:34:29,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 3807 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-05 16:34:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:34:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 130830 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130822 trivial. 0 not checked. [2021-11-05 16:34:31,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:34:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 130830 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 130822 trivial. 0 not checked. [2021-11-05 16:34:32,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003727410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:34:32,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:34:32,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-05 16:34:32,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309514600] [2021-11-05 16:34:32,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:34:32,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-05 16:34:32,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:34:32,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-05 16:34:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:34:32,267 INFO L87 Difference]: Start difference. First operand 4664 states and 5885 transitions. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:34:33,152 INFO L93 Difference]: Finished difference Result 13690 states and 17283 transitions. [2021-11-05 16:34:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-05 16:34:33,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1111 [2021-11-05 16:34:33,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:34:33,166 INFO L225 Difference]: With dead ends: 13690 [2021-11-05 16:34:33,167 INFO L226 Difference]: Without dead ends: 9050 [2021-11-05 16:34:33,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2230 GetRequests, 2219 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.11ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-05 16:34:33,175 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 226 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.91ms IncrementalHoareTripleChecker+Time [2021-11-05 16:34:33,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 1380 Invalid, 34 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [11 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 59.91ms Time] [2021-11-05 16:34:33,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2021-11-05 16:34:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 4676. [2021-11-05 16:34:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4676 states, 4675 states have (on average 1.2613903743315509) internal successors, (5897), 4675 states have internal predecessors, (5897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 5897 transitions. [2021-11-05 16:34:33,698 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 5897 transitions. Word has length 1111 [2021-11-05 16:34:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:34:33,699 INFO L470 AbstractCegarLoop]: Abstraction has 4676 states and 5897 transitions. [2021-11-05 16:34:33,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:34:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 5897 transitions. [2021-11-05 16:34:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1115 [2021-11-05 16:34:33,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:34:33,709 INFO L514 BasicCegarLoop]: trace histogram [256, 256, 256, 256, 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] [2021-11-05 16:34:33,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-05 16:34:33,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-05 16:34:33,934 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:34:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:34:33,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1594221284, now seen corresponding path program 2 times [2021-11-05 16:34:33,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:34:33,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257562948] [2021-11-05 16:34:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:34:33,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:34:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:34:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 130839 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 130822 trivial. 0 not checked. [2021-11-05 16:34:35,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:34:35,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257562948] [2021-11-05 16:34:35,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257562948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:34:35,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276418719] [2021-11-05 16:34:35,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:34:35,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:34:35,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:34:35,233 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:34:35,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-05 16:38:05,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 16:38:05,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:38:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 3891 conjuncts, 166 conjunts are in the unsatisfiable core [2021-11-05 16:38:05,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:06,063 INFO L354 Elim1Store]: treesize reduction 892, result has 7.4 percent of original size [2021-11-05 16:38:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 76 [2021-11-05 16:38:06,986 INFO L354 Elim1Store]: treesize reduction 424, result has 21.9 percent of original size [2021-11-05 16:38:06,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 85 treesize of output 182 [2021-11-05 16:38:14,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-05 16:38:14,118 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-05 16:38:14,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-05 16:38:14,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:38:14,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-05 16:38:14,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180295675] [2021-11-05 16:38:14,121 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-05 16:38:14,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 16:38:14,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:38:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 16:38:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:38:14,122 INFO L87 Difference]: Start difference. First operand 4676 states and 5897 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-05 16:38:14,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.83ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:38:14,273 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:14,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 339 Invalid, 1 Unknown, 0 Unchecked, 0.18ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-05 16:38:14,481 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forcibly destroying the process [2021-11-05 16:38:14,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:14,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-05 16:38:14,486 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@20b44c57 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-05 16:38:14,490 INFO L158 Benchmark]: Toolchain (without parser) took 757077.36ms. Allocated memory was 67.1MB in the beginning and 4.8GB in the end (delta: 4.8GB). Free memory was 45.0MB in the beginning and 3.3GB in the end (delta: -3.3GB). Peak memory consumption was 2.1GB. Max. memory is 16.1GB. [2021-11-05 16:38:14,490 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.3MB in the beginning and 32.3MB in the end (delta: 54.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-05 16:38:14,490 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1097.17ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 44.8MB in the beginning and 53.8MB in the end (delta: -9.0MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2021-11-05 16:38:14,490 INFO L158 Benchmark]: Boogie Procedure Inliner took 89.31ms. Allocated memory is still 98.6MB. Free memory was 53.8MB in the beginning and 48.8MB in the end (delta: 5.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-05 16:38:14,490 INFO L158 Benchmark]: Boogie Preprocessor took 101.23ms. Allocated memory is still 98.6MB. Free memory was 48.8MB in the beginning and 44.2MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-05 16:38:14,491 INFO L158 Benchmark]: RCFGBuilder took 1004.12ms. Allocated memory was 98.6MB in the beginning and 172.0MB in the end (delta: 73.4MB). Free memory was 44.2MB in the beginning and 127.5MB in the end (delta: -83.3MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2021-11-05 16:38:14,491 INFO L158 Benchmark]: TraceAbstraction took 754772.44ms. Allocated memory was 172.0MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 127.5MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 2.1GB. Max. memory is 16.1GB. [2021-11-05 16:38:14,492 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.3MB in the beginning and 32.3MB in the end (delta: 54.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1097.17ms. Allocated memory was 67.1MB in the beginning and 98.6MB in the end (delta: 31.5MB). Free memory was 44.8MB in the beginning and 53.8MB in the end (delta: -9.0MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 89.31ms. Allocated memory is still 98.6MB. Free memory was 53.8MB in the beginning and 48.8MB in the end (delta: 5.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 101.23ms. Allocated memory is still 98.6MB. Free memory was 48.8MB in the beginning and 44.2MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1004.12ms. Allocated memory was 98.6MB in the beginning and 172.0MB in the end (delta: 73.4MB). Free memory was 44.2MB in the beginning and 127.5MB in the end (delta: -83.3MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * TraceAbstraction took 754772.44ms. Allocated memory was 172.0MB in the beginning and 4.8GB in the end (delta: 4.7GB). Free memory was 127.5MB in the beginning and 3.3GB in the end (delta: -3.2GB). Peak memory consumption was 2.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@20b44c57 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@20b44c57: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 16:38:16,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 16:38:16,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 16:38:16,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 16:38:16,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 16:38:16,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 16:38:16,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 16:38:16,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 16:38:16,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 16:38:16,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 16:38:16,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 16:38:16,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 16:38:16,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 16:38:16,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 16:38:16,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 16:38:16,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 16:38:16,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 16:38:16,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 16:38:16,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 16:38:16,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 16:38:16,343 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 16:38:16,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 16:38:16,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 16:38:16,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 16:38:16,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 16:38:16,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 16:38:16,354 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 16:38:16,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 16:38:16,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 16:38:16,356 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 16:38:16,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 16:38:16,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 16:38:16,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 16:38:16,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 16:38:16,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 16:38:16,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 16:38:16,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 16:38:16,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 16:38:16,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 16:38:16,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 16:38:16,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 16:38:16,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-05 16:38:16,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 16:38:16,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 16:38:16,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 16:38:16,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 16:38:16,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 16:38:16,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 16:38:16,405 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 16:38:16,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 16:38:16,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 16:38:16,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 16:38:16,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 16:38:16,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 16:38:16,407 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-05 16:38:16,407 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-05 16:38:16,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 16:38:16,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 16:38:16,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 16:38:16,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 16:38:16,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 16:38:16,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 16:38:16,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:38:16,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 16:38:16,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 16:38:16,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 16:38:16,409 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-05 16:38:16,416 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-05 16:38:16,417 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 16:38:16,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 16:38:16,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 16:38:16,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 16:38:16,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-05 16:38:16,418 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c [2021-11-05 16:38:16,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 16:38:16,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 16:38:16,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 16:38:16,752 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 16:38:16,752 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 16:38:16,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-05 16:38:16,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a0ef820/c1fdc4f63f3e43b5815343f0fba1f676/FLAG5a94c1708 [2021-11-05 16:38:17,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 16:38:17,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-05 16:38:17,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a0ef820/c1fdc4f63f3e43b5815343f0fba1f676/FLAG5a94c1708 [2021-11-05 16:38:17,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2a0ef820/c1fdc4f63f3e43b5815343f0fba1f676 [2021-11-05 16:38:17,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 16:38:17,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 16:38:17,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 16:38:17,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 16:38:17,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 16:38:17,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:38:17" (1/1) ... [2021-11-05 16:38:17,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1392a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:17, skipping insertion in model container [2021-11-05 16:38:17,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:38:17" (1/1) ... [2021-11-05 16:38:17,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 16:38:17,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 16:38:18,422 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-05 16:38:18,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:38:18,646 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 16:38:18,771 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-11-05 16:38:18,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:38:18,875 INFO L208 MainTranslator]: Completed translation [2021-11-05 16:38:18,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18 WrapperNode [2021-11-05 16:38:18,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 16:38:18,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 16:38:18,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 16:38:18,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 16:38:18,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:18,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:18,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 16:38:18,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 16:38:18,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 16:38:18,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 16:38:18,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:18,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:18,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:18,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:18,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:19,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:19,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:19,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 16:38:19,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 16:38:19,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 16:38:19,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 16:38:19,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (1/1) ... [2021-11-05 16:38:19,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:38:19,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:38:19,068 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) [2021-11-05 16:38:19,088 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 [2021-11-05 16:38:19,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-05 16:38:19,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 16:38:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 16:38:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-05 16:38:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-05 16:38:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-05 16:38:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-05 16:38:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-05 16:38:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 16:38:19,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 16:38:19,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 16:38:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-05 16:38:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-05 16:38:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-05 16:38:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 16:38:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-05 16:38:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 16:38:19,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-05 16:38:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-05 16:38:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-05 16:38:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-05 16:38:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-05 16:38:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-05 16:38:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-05 16:38:19,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 16:38:19,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 16:38:19,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 16:38:20,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 16:38:20,389 INFO L299 CfgBuilder]: Removed 109 assume(true) statements. [2021-11-05 16:38:20,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:38:20 BoogieIcfgContainer [2021-11-05 16:38:20,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 16:38:20,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 16:38:20,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 16:38:20,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 16:38:20,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 04:38:17" (1/3) ... [2021-11-05 16:38:20,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7343555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:38:20, skipping insertion in model container [2021-11-05 16:38:20,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:38:18" (2/3) ... [2021-11-05 16:38:20,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7343555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:38:20, skipping insertion in model container [2021-11-05 16:38:20,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:38:20" (3/3) ... [2021-11-05 16:38:20,399 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-11-05 16:38:20,406 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 16:38:20,406 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-05 16:38:20,457 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 16:38:20,469 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 [2021-11-05 16:38:20,470 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-05 16:38:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-05 16:38:20,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:20,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:38:20,493 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -695882203, now seen corresponding path program 1 times [2021-11-05 16:38:20,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:20,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818741093] [2021-11-05 16:38:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:38:20,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:20,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:20,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-05 16:38:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:38:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:38:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:38:20,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:38:20,894 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:20,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818741093] [2021-11-05 16:38:20,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818741093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:38:20,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:38:20,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-05 16:38:20,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784434414] [2021-11-05 16:38:20,897 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:38:20,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:38:20,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:20,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:38:20,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:38:20,932 INFO L87 Difference]: Start difference. First operand has 136 states, 134 states have (on average 1.507462686567164) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-11-05 16:38:21,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:21,010 INFO L93 Difference]: Finished difference Result 268 states and 399 transitions. [2021-11-05 16:38:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:38:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 18 [2021-11-05 16:38:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:21,021 INFO L225 Difference]: With dead ends: 268 [2021-11-05 16:38:21,021 INFO L226 Difference]: Without dead ends: 130 [2021-11-05 16:38:21,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.29ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:38:21,028 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 0 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.08ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:21,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 557 Invalid, 5 Unknown, 0 Unchecked, 8.15ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 15.08ms Time] [2021-11-05 16:38:21,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-05 16:38:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-05 16:38:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3875968992248062) internal successors, (179), 129 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2021-11-05 16:38:21,085 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 18 [2021-11-05 16:38:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:21,086 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2021-11-05 16:38:21,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-11-05 16:38:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2021-11-05 16:38:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-05 16:38:21,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:21,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:38:21,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:21,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:21,304 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1963993750, now seen corresponding path program 1 times [2021-11-05 16:38:21,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:21,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425352208] [2021-11-05 16:38:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:38:21,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:21,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:21,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:21,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-05 16:38:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:38:21,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:38:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 16:38:21,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 16:38:21,628 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:21,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425352208] [2021-11-05 16:38:21,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425352208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:38:21,631 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:38:21,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-05 16:38:21,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404365630] [2021-11-05 16:38:21,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:38:21,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:38:21,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:38:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:38:21,636 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:21,739 INFO L93 Difference]: Finished difference Result 438 states and 617 transitions. [2021-11-05 16:38:21,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:38:21,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-05 16:38:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:21,741 INFO L225 Difference]: With dead ends: 438 [2021-11-05 16:38:21,741 INFO L226 Difference]: Without dead ends: 319 [2021-11-05 16:38:21,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.52ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:38:21,743 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 419 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.19ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:21,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 460 Invalid, 27 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [9 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 79.19ms Time] [2021-11-05 16:38:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-05 16:38:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2021-11-05 16:38:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.4056603773584906) internal successors, (447), 318 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 447 transitions. [2021-11-05 16:38:21,762 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 447 transitions. Word has length 19 [2021-11-05 16:38:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:21,762 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 447 transitions. [2021-11-05 16:38:21,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 447 transitions. [2021-11-05 16:38:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-05 16:38:21,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:21,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:38:21,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:21,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:21,976 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:21,976 INFO L85 PathProgramCache]: Analyzing trace with hash 717727145, now seen corresponding path program 1 times [2021-11-05 16:38:21,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:21,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416723165] [2021-11-05 16:38:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:38:21,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:21,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:21,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:21,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-05 16:38:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:38:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:38:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 16:38:22,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 16:38:22,250 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:22,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416723165] [2021-11-05 16:38:22,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416723165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:38:22,252 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:38:22,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-05 16:38:22,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036060415] [2021-11-05 16:38:22,252 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:38:22,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:38:22,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:38:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:38:22,253 INFO L87 Difference]: Start difference. First operand 319 states and 447 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-11-05 16:38:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:22,291 INFO L93 Difference]: Finished difference Result 632 states and 889 transitions. [2021-11-05 16:38:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:38:22,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 25 [2021-11-05 16:38:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:22,293 INFO L225 Difference]: With dead ends: 632 [2021-11-05 16:38:22,293 INFO L226 Difference]: Without dead ends: 324 [2021-11-05 16:38:22,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.88ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:38:22,295 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 12 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.93ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:22,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 346 Invalid, 12 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 26.93ms Time] [2021-11-05 16:38:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-05 16:38:22,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-11-05 16:38:22,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.4024767801857585) internal successors, (453), 323 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 453 transitions. [2021-11-05 16:38:22,316 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 453 transitions. Word has length 25 [2021-11-05 16:38:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:22,316 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 453 transitions. [2021-11-05 16:38:22,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-11-05 16:38:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 453 transitions. [2021-11-05 16:38:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-05 16:38:22,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:22,318 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-05 16:38:22,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:22,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:22,528 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:22,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1524412699, now seen corresponding path program 1 times [2021-11-05 16:38:22,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:22,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964369795] [2021-11-05 16:38:22,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:38:22,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:22,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:22,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-05 16:38:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:38:22,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:38:22,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 16:38:22,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 16:38:22,873 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:22,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964369795] [2021-11-05 16:38:22,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964369795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:38:22,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:38:22,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-05 16:38:22,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124288990] [2021-11-05 16:38:22,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:38:22,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-05 16:38:22,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-05 16:38:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-05 16:38:22,875 INFO L87 Difference]: Start difference. First operand 324 states and 453 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:23,043 INFO L93 Difference]: Finished difference Result 653 states and 917 transitions. [2021-11-05 16:38:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-05 16:38:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 33 [2021-11-05 16:38:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:23,045 INFO L225 Difference]: With dead ends: 653 [2021-11-05 16:38:23,046 INFO L226 Difference]: Without dead ends: 340 [2021-11-05 16:38:23,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.69ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-05 16:38:23,047 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 38 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.61ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.84ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:23,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 697 Invalid, 57 Unknown, 0 Unchecked, 2.61ms Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 110.84ms Time] [2021-11-05 16:38:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-05 16:38:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-11-05 16:38:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.3952802359882006) internal successors, (473), 339 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 473 transitions. [2021-11-05 16:38:23,062 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 473 transitions. Word has length 33 [2021-11-05 16:38:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:23,062 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 473 transitions. [2021-11-05 16:38:23,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 473 transitions. [2021-11-05 16:38:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-05 16:38:23,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:23,064 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:38:23,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:23,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:23,275 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:23,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:23,275 INFO L85 PathProgramCache]: Analyzing trace with hash 997462527, now seen corresponding path program 2 times [2021-11-05 16:38:23,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:23,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006091552] [2021-11-05 16:38:23,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:38:23,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:23,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:23,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:23,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-05 16:38:23,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-05 16:38:23,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:38:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-05 16:38:23,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-05 16:38:23,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-05 16:38:23,581 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:23,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006091552] [2021-11-05 16:38:23,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006091552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:38:23,581 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:38:23,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-05 16:38:23,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983305186] [2021-11-05 16:38:23,582 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:38:23,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:38:23,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:38:23,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:38:23,584 INFO L87 Difference]: Start difference. First operand 340 states and 473 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:23,626 INFO L93 Difference]: Finished difference Result 668 states and 931 transitions. [2021-11-05 16:38:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:38:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-05 16:38:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:23,629 INFO L225 Difference]: With dead ends: 668 [2021-11-05 16:38:23,629 INFO L226 Difference]: Without dead ends: 339 [2021-11-05 16:38:23,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.77ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:38:23,630 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 327 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.82ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:23,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 456 Invalid, 8 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 17.82ms Time] [2021-11-05 16:38:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-05 16:38:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2021-11-05 16:38:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.3875739644970415) internal successors, (469), 338 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 469 transitions. [2021-11-05 16:38:23,653 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 469 transitions. Word has length 49 [2021-11-05 16:38:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:23,653 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 469 transitions. [2021-11-05 16:38:23,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 469 transitions. [2021-11-05 16:38:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-05 16:38:23,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:23,661 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-05 16:38:23,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:23,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:23,873 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1345023994, now seen corresponding path program 1 times [2021-11-05 16:38:23,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:23,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431429058] [2021-11-05 16:38:23,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:38:23,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:23,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:23,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:23,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-05 16:38:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:38:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-05 16:38:24,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 16:38:24,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-05 16:38:24,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:24,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431429058] [2021-11-05 16:38:24,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431429058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:38:24,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:38:24,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-05 16:38:24,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520964922] [2021-11-05 16:38:24,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:38:24,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-05 16:38:24,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:24,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-05 16:38:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-05 16:38:24,509 INFO L87 Difference]: Start difference. First operand 339 states and 469 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:25,173 INFO L93 Difference]: Finished difference Result 605 states and 841 transitions. [2021-11-05 16:38:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-05 16:38:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-05 16:38:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:25,177 INFO L225 Difference]: With dead ends: 605 [2021-11-05 16:38:25,177 INFO L226 Difference]: Without dead ends: 371 [2021-11-05 16:38:25,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 400.57ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-05 16:38:25,178 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 92 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 332.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 394.12ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:25,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1578 Invalid, 250 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [14 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 394.12ms Time] [2021-11-05 16:38:25,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-05 16:38:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2021-11-05 16:38:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.3756756756756756) internal successors, (509), 370 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 509 transitions. [2021-11-05 16:38:25,194 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 509 transitions. Word has length 60 [2021-11-05 16:38:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:25,194 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 509 transitions. [2021-11-05 16:38:25,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 509 transitions. [2021-11-05 16:38:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-05 16:38:25,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:25,196 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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] [2021-11-05 16:38:25,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:25,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:25,411 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1897514690, now seen corresponding path program 2 times [2021-11-05 16:38:25,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:25,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146257047] [2021-11-05 16:38:25,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:38:25,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:25,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:25,414 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:25,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-05 16:38:25,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-05 16:38:25,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:38:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-05 16:38:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-05 16:38:25,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-05 16:38:26,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:26,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146257047] [2021-11-05 16:38:26,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146257047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:38:26,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:38:26,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-05 16:38:26,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073600707] [2021-11-05 16:38:26,073 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:38:26,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-05 16:38:26,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-05 16:38:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:38:26,074 INFO L87 Difference]: Start difference. First operand 371 states and 509 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:26,184 INFO L93 Difference]: Finished difference Result 1089 states and 1500 transitions. [2021-11-05 16:38:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:38:26,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 92 [2021-11-05 16:38:26,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:26,187 INFO L225 Difference]: With dead ends: 1089 [2021-11-05 16:38:26,187 INFO L226 Difference]: Without dead ends: 725 [2021-11-05 16:38:26,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.33ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-05 16:38:26,189 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 142 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.53ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.62ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:26,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 821 Invalid, 53 Unknown, 0 Unchecked, 1.53ms Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 65.62ms Time] [2021-11-05 16:38:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-05 16:38:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 713. [2021-11-05 16:38:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.377808988764045) internal successors, (981), 712 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 981 transitions. [2021-11-05 16:38:26,213 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 981 transitions. Word has length 92 [2021-11-05 16:38:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 981 transitions. [2021-11-05 16:38:26,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 981 transitions. [2021-11-05 16:38:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-05 16:38:26,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:26,215 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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] [2021-11-05 16:38:26,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-05 16:38:26,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:26,425 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:26,426 INFO L85 PathProgramCache]: Analyzing trace with hash 970193347, now seen corresponding path program 1 times [2021-11-05 16:38:26,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:26,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057081192] [2021-11-05 16:38:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:38:26,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:26,428 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:26,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-05 16:38:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:38:26,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-05 16:38:26,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-05 16:38:26,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2021-11-05 16:38:27,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:27,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057081192] [2021-11-05 16:38:27,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057081192] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:38:27,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:38:27,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-05 16:38:27,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688346434] [2021-11-05 16:38:27,142 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:38:27,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:38:27,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:38:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:38:27,143 INFO L87 Difference]: Start difference. First operand 713 states and 981 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:27,208 INFO L93 Difference]: Finished difference Result 1424 states and 1949 transitions. [2021-11-05 16:38:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:38:27,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-05 16:38:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:27,212 INFO L225 Difference]: With dead ends: 1424 [2021-11-05 16:38:27,212 INFO L226 Difference]: Without dead ends: 722 [2021-11-05 16:38:27,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.48ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:38:27,213 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 43 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.21ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:27,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 335 Invalid, 14 Unknown, 0 Unchecked, 0.65ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 33.21ms Time] [2021-11-05 16:38:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-05 16:38:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 581. [2021-11-05 16:38:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.3758620689655172) internal successors, (798), 580 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 798 transitions. [2021-11-05 16:38:27,234 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 798 transitions. Word has length 117 [2021-11-05 16:38:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:27,234 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 798 transitions. [2021-11-05 16:38:27,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 798 transitions. [2021-11-05 16:38:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-05 16:38:27,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:27,240 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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] [2021-11-05 16:38:27,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:27,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:27,458 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1735419593, now seen corresponding path program 2 times [2021-11-05 16:38:27,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:27,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857643953] [2021-11-05 16:38:27,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:38:27,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:27,461 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:27,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-05 16:38:27,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 16:38:27,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:38:27,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-05 16:38:27,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:38:28,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:38:28,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:28,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857643953] [2021-11-05 16:38:28,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857643953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:38:28,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:38:28,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-05 16:38:28,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240621713] [2021-11-05 16:38:28,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:38:28,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-05 16:38:28,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-05 16:38:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-11-05 16:38:28,908 INFO L87 Difference]: Start difference. First operand 581 states and 798 transitions. Second operand has 32 states, 32 states have (on average 5.4375) internal successors, (174), 32 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:31,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:31,621 INFO L93 Difference]: Finished difference Result 1266 states and 1758 transitions. [2021-11-05 16:38:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-05 16:38:31,622 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.4375) internal successors, (174), 32 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-05 16:38:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:31,624 INFO L225 Difference]: With dead ends: 1266 [2021-11-05 16:38:31,624 INFO L226 Difference]: Without dead ends: 709 [2021-11-05 16:38:31,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1870.53ms TimeCoverageRelationStatistics Valid=734, Invalid=1336, Unknown=0, NotChecked=0, Total=2070 [2021-11-05 16:38:31,626 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 315 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1144.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 3790 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.83ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1337.51ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:31,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 3790 Invalid, 1022 Unknown, 0 Unchecked, 4.83ms Time], IncrementalHoareTripleChecker [30 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1337.51ms Time] [2021-11-05 16:38:31,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-05 16:38:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 709. [2021-11-05 16:38:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 1.3531073446327684) internal successors, (958), 708 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 958 transitions. [2021-11-05 16:38:31,651 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 958 transitions. Word has length 117 [2021-11-05 16:38:31,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:31,653 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 958 transitions. [2021-11-05 16:38:31,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.4375) internal successors, (174), 32 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 958 transitions. [2021-11-05 16:38:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-05 16:38:31,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:31,655 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 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] [2021-11-05 16:38:31,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:31,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:31,869 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:31,869 INFO L85 PathProgramCache]: Analyzing trace with hash 352735833, now seen corresponding path program 3 times [2021-11-05 16:38:31,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:31,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242679348] [2021-11-05 16:38:31,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-05 16:38:31,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:31,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:31,871 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:31,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-05 16:38:32,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-05 16:38:32,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:38:32,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-05 16:38:32,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2021-11-05 16:38:32,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1773 trivial. 0 not checked. [2021-11-05 16:38:32,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:32,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242679348] [2021-11-05 16:38:32,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242679348] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-05 16:38:32,622 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:38:32,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-05 16:38:32,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770636171] [2021-11-05 16:38:32,622 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-05 16:38:32,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:38:32,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:38:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:38:32,623 INFO L87 Difference]: Start difference. First operand 709 states and 958 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:32,764 INFO L93 Difference]: Finished difference Result 3143 states and 4253 transitions. [2021-11-05 16:38:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:38:32,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2021-11-05 16:38:32,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:32,773 INFO L225 Difference]: With dead ends: 3143 [2021-11-05 16:38:32,773 INFO L226 Difference]: Without dead ends: 2458 [2021-11-05 16:38:32,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.97ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:38:32,776 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 429 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.93ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.73ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:32,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 678 Invalid, 37 Unknown, 0 Unchecked, 3.93ms Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 51.73ms Time] [2021-11-05 16:38:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-11-05 16:38:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 717. [2021-11-05 16:38:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.3491620111731844) internal successors, (966), 716 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 966 transitions. [2021-11-05 16:38:32,834 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 966 transitions. Word has length 181 [2021-11-05 16:38:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:32,835 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 966 transitions. [2021-11-05 16:38:32,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 966 transitions. [2021-11-05 16:38:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-05 16:38:32,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:32,837 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 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] [2021-11-05 16:38:32,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:33,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:33,055 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:33,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash -892508046, now seen corresponding path program 1 times [2021-11-05 16:38:33,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:33,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44066928] [2021-11-05 16:38:33,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:38:33,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:33,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:33,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:33,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-05 16:38:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:38:33,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-05 16:38:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 7 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:38:34,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 7 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:38:36,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:36,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44066928] [2021-11-05 16:38:36,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44066928] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:38:36,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:38:36,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2021-11-05 16:38:36,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820853954] [2021-11-05 16:38:36,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:38:36,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-05 16:38:36,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:36,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-05 16:38:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2021-11-05 16:38:36,372 INFO L87 Difference]: Start difference. First operand 717 states and 966 transitions. Second operand has 64 states, 64 states have (on average 4.765625) internal successors, (305), 64 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:38:48,231 INFO L93 Difference]: Finished difference Result 1666 states and 2286 transitions. [2021-11-05 16:38:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-05 16:38:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.765625) internal successors, (305), 64 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-11-05 16:38:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:38:48,245 INFO L225 Difference]: With dead ends: 1666 [2021-11-05 16:38:48,246 INFO L226 Difference]: Without dead ends: 973 [2021-11-05 16:38:48,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 9781.17ms TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2021-11-05 16:38:48,250 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 1207 mSDsluCounter, 6368 mSDsCounter, 0 mSdLazyCounter, 4028 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3519.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 6570 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.75ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 4028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4090.36ms IncrementalHoareTripleChecker+Time [2021-11-05 16:38:48,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 6570 Invalid, 4090 Unknown, 0 Unchecked, 9.75ms Time], IncrementalHoareTripleChecker [62 Valid, 4028 Invalid, 0 Unknown, 0 Unchecked, 4090.36ms Time] [2021-11-05 16:38:48,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-05 16:38:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 973. [2021-11-05 16:38:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 1.323045267489712) internal successors, (1286), 972 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1286 transitions. [2021-11-05 16:38:48,294 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1286 transitions. Word has length 184 [2021-11-05 16:38:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:38:48,295 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1286 transitions. [2021-11-05 16:38:48,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.765625) internal successors, (305), 64 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:38:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1286 transitions. [2021-11-05 16:38:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-05 16:38:48,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:38:48,299 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 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] [2021-11-05 16:38:48,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-05 16:38:48,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-05 16:38:48,514 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:38:48,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:38:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1377157806, now seen corresponding path program 2 times [2021-11-05 16:38:48,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-05 16:38:48,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965137564] [2021-11-05 16:38:48,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-05 16:38:48,515 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-05 16:38:48,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-05 16:38:48,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-05 16:38:48,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-05 16:38:49,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-05 16:38:49,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-05 16:38:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-05 16:38:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:38:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7636 backedges. 7 proven. 7626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:38:51,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:38:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7636 backedges. 7 proven. 7626 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:38:58,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-05 16:38:58,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965137564] [2021-11-05 16:38:58,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965137564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:38:58,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-05 16:38:58,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 128 [2021-11-05 16:38:58,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553842636] [2021-11-05 16:38:58,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-05 16:38:58,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-05 16:38:58,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-05 16:38:58,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-05 16:38:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4222, Invalid=12034, Unknown=0, NotChecked=0, Total=16256 [2021-11-05 16:38:58,571 INFO L87 Difference]: Start difference. First operand 973 states and 1286 transitions. Second operand has 128 states, 128 states have (on average 4.3828125) internal successors, (561), 128 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15