./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.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_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.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 6b3de547936c1646f60b80d97a1625774e2d4a48db257d02bb1b2f3a0d43e91e --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 16:42:44,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 16:42:44,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 16:42:45,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 16:42:45,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 16:42:45,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 16:42:45,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 16:42:45,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 16:42:45,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 16:42:45,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 16:42:45,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 16:42:45,041 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 16:42:45,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 16:42:45,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 16:42:45,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 16:42:45,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 16:42:45,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 16:42:45,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 16:42:45,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 16:42:45,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 16:42:45,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 16:42:45,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 16:42:45,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 16:42:45,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 16:42:45,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 16:42:45,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 16:42:45,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 16:42:45,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 16:42:45,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 16:42:45,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 16:42:45,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 16:42:45,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 16:42:45,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 16:42:45,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 16:42:45,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 16:42:45,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 16:42:45,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 16:42:45,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 16:42:45,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 16:42:45,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 16:42:45,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 16:42:45,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 16:42:45,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 16:42:45,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 16:42:45,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 16:42:45,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 16:42:45,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 16:42:45,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 16:42:45,112 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 16:42:45,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 16:42:45,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 16:42:45,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 16:42:45,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 16:42:45,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 16:42:45,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 16:42:45,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 16:42:45,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 16:42:45,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 16:42:45,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 16:42:45,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 16:42:45,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 16:42:45,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:42:45,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 16:42:45,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 16:42:45,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 16:42:45,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 16:42:45,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 16:42:45,116 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 16:42:45,117 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 16:42:45,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 16:42:45,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 16:42:45,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b3de547936c1646f60b80d97a1625774e2d4a48db257d02bb1b2f3a0d43e91e [2021-11-05 16:42:45,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 16:42:45,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 16:42:45,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 16:42:45,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 16:42:45,435 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 16:42:45,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-11-05 16:42:45,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15107462a/879a82ce5a574684a760210d1d74b7b4/FLAG9a1e340c1 [2021-11-05 16:42:46,150 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 16:42:46,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-11-05 16:42:46,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15107462a/879a82ce5a574684a760210d1d74b7b4/FLAG9a1e340c1 [2021-11-05 16:42:46,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15107462a/879a82ce5a574684a760210d1d74b7b4 [2021-11-05 16:42:46,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 16:42:46,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 16:42:46,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 16:42:46,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 16:42:46,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 16:42:46,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:42:46" (1/1) ... [2021-11-05 16:42:46,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f116e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:46, skipping insertion in model container [2021-11-05 16:42:46,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:42:46" (1/1) ... [2021-11-05 16:42:46,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 16:42:46,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 16:42:47,065 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2021-11-05 16:42:47,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:42:47,555 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 16:42:47,672 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2021-11-05 16:42:47,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:42:47,916 INFO L208 MainTranslator]: Completed translation [2021-11-05 16:42:47,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47 WrapperNode [2021-11-05 16:42:47,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 16:42:47,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 16:42:47,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 16:42:47,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 16:42:47,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:47,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:48,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 16:42:48,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 16:42:48,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 16:42:48,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 16:42:48,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:48,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:48,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:48,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:49,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:49,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:49,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:49,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 16:42:49,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 16:42:49,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 16:42:49,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 16:42:49,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (1/1) ... [2021-11-05 16:42:49,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:42:49,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:42:49,576 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 16:42:49,585 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 16:42:49,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-05 16:42:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 16:42:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 16:42:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 16:42:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 16:42:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 16:42:49,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 16:42:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 16:42:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 16:42:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 16:42:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 16:42:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 16:42:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-05 16:42:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 16:42:49,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 16:43:00,433 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 16:43:00,433 INFO L299 CfgBuilder]: Removed 3847 assume(true) statements. [2021-11-05 16:43:00,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:43:00 BoogieIcfgContainer [2021-11-05 16:43:00,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 16:43:00,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 16:43:00,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 16:43:00,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 16:43:00,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 04:42:46" (1/3) ... [2021-11-05 16:43:00,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1029b99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:43:00, skipping insertion in model container [2021-11-05 16:43:00,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:42:47" (2/3) ... [2021-11-05 16:43:00,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1029b99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:43:00, skipping insertion in model container [2021-11-05 16:43:00,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:43:00" (3/3) ... [2021-11-05 16:43:00,449 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-11-05 16:43:00,454 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 16:43:00,454 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-05 16:43:00,510 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 16:43:00,516 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 16:43:00,516 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-05 16:43:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 4667 states, 4665 states have (on average 1.4655948553054663) internal successors, (6837), 4666 states have internal predecessors, (6837), 0 states have call successors, (0), 0 states 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 16:43:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-05 16:43:00,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:00,581 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] [2021-11-05 16:43:00,582 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:00,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:00,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1642635718, now seen corresponding path program 1 times [2021-11-05 16:43:00,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:00,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026563869] [2021-11-05 16:43:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:00,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:00,996 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 16:43:00,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:00,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026563869] [2021-11-05 16:43:00,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026563869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:00,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:00,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:43:00,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634795657] [2021-11-05 16:43:01,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:01,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:43:01,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:43:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:01,034 INFO L87 Difference]: Start difference. First operand has 4667 states, 4665 states have (on average 1.4655948553054663) internal successors, (6837), 4666 states have internal predecessors, (6837), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 16:43:01,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:01,614 INFO L93 Difference]: Finished difference Result 13949 states and 20444 transitions. [2021-11-05 16:43:01,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:43:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-05 16:43:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:01,674 INFO L225 Difference]: With dead ends: 13949 [2021-11-05 16:43:01,674 INFO L226 Difference]: Without dead ends: 9275 [2021-11-05 16:43:01,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.95ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:01,702 INFO L933 BasicCegarLoop]: 6558 mSDtfsCounter, 6502 mSDsluCounter, 6547 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 238.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6502 SdHoareTripleChecker+Valid, 13105 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.12ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 272.43ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:01,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6502 Valid, 13105 Invalid, 15 Unknown, 0 Unchecked, 32.12ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 272.43ms Time] [2021-11-05 16:43:01,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9275 states. [2021-11-05 16:43:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9275 to 9275. [2021-11-05 16:43:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9275 states, 9274 states have (on average 1.4067284882467113) internal successors, (13046), 9274 states have internal predecessors, (13046), 0 states have call successors, (0), 0 states 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 16:43:01,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9275 states to 9275 states and 13046 transitions. [2021-11-05 16:43:01,981 INFO L78 Accepts]: Start accepts. Automaton has 9275 states and 13046 transitions. Word has length 22 [2021-11-05 16:43:01,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:01,981 INFO L470 AbstractCegarLoop]: Abstraction has 9275 states and 13046 transitions. [2021-11-05 16:43:01,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 16:43:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 9275 states and 13046 transitions. [2021-11-05 16:43:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-05 16:43:01,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:01,990 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] [2021-11-05 16:43:01,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 16:43:01,990 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash -899430506, now seen corresponding path program 1 times [2021-11-05 16:43:01,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:01,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884515239] [2021-11-05 16:43:01,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:01,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:02,114 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 16:43:02,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:02,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884515239] [2021-11-05 16:43:02,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884515239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:02,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:02,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:43:02,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748203668] [2021-11-05 16:43:02,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:02,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:43:02,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:02,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:43:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:43:02,118 INFO L87 Difference]: Start difference. First operand 9275 states and 13046 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 16:43:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:02,489 INFO L93 Difference]: Finished difference Result 18526 states and 26063 transitions. [2021-11-05 16:43:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:43:02,489 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 26 [2021-11-05 16:43:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:02,526 INFO L225 Difference]: With dead ends: 18526 [2021-11-05 16:43:02,526 INFO L226 Difference]: Without dead ends: 9274 [2021-11-05 16:43:02,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.36ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:43:02,543 INFO L933 BasicCegarLoop]: 13039 mSDtfsCounter, 13062 mSDsluCounter, 6521 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13062 SdHoareTripleChecker+Valid, 19560 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.29ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.66ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:02,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13062 Valid, 19560 Invalid, 8 Unknown, 0 Unchecked, 38.29ms Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 22.66ms Time] [2021-11-05 16:43:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9274 states. [2021-11-05 16:43:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9274 to 9274. [2021-11-05 16:43:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 1.4064488299363744) internal successors, (13042), 9273 states have internal predecessors, (13042), 0 states have call successors, (0), 0 states 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 16:43:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 13042 transitions. [2021-11-05 16:43:03,060 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 13042 transitions. Word has length 26 [2021-11-05 16:43:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:03,060 INFO L470 AbstractCegarLoop]: Abstraction has 9274 states and 13042 transitions. [2021-11-05 16:43:03,061 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 16:43:03,062 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 13042 transitions. [2021-11-05 16:43:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-05 16:43:03,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:03,067 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, 1, 1, 1, 1, 1] [2021-11-05 16:43:03,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 16:43:03,067 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:03,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:03,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1619061827, now seen corresponding path program 1 times [2021-11-05 16:43:03,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:03,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369482862] [2021-11-05 16:43:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:03,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-05 16:43:03,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:03,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369482862] [2021-11-05 16:43:03,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369482862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:03,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:03,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-05 16:43:03,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253473630] [2021-11-05 16:43:03,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:03,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:43:03,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:03,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:43:03,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:43:03,186 INFO L87 Difference]: Start difference. First operand 9274 states and 13042 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 16:43:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:04,189 INFO L93 Difference]: Finished difference Result 27774 states and 39071 transitions. [2021-11-05 16:43:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:43:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 38 [2021-11-05 16:43:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:04,253 INFO L225 Difference]: With dead ends: 27774 [2021-11-05 16:43:04,253 INFO L226 Difference]: Without dead ends: 18519 [2021-11-05 16:43:04,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.14ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-05 16:43:04,277 INFO L933 BasicCegarLoop]: 6383 mSDtfsCounter, 6482 mSDsluCounter, 19110 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 376.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6482 SdHoareTripleChecker+Valid, 25493 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.40ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 468.75ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:04,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6482 Valid, 25493 Invalid, 693 Unknown, 0 Unchecked, 42.40ms Time], IncrementalHoareTripleChecker [7 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 468.75ms Time] [2021-11-05 16:43:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18519 states. [2021-11-05 16:43:04,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18519 to 18279. [2021-11-05 16:43:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18279 states, 18278 states have (on average 1.4081956450377504) internal successors, (25739), 18278 states have internal predecessors, (25739), 0 states have call successors, (0), 0 states 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 16:43:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18279 states to 18279 states and 25739 transitions. [2021-11-05 16:43:04,934 INFO L78 Accepts]: Start accepts. Automaton has 18279 states and 25739 transitions. Word has length 38 [2021-11-05 16:43:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:04,934 INFO L470 AbstractCegarLoop]: Abstraction has 18279 states and 25739 transitions. [2021-11-05 16:43:04,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 16:43:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 18279 states and 25739 transitions. [2021-11-05 16:43:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-05 16:43:04,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:04,945 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:04,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 16:43:04,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash -770183526, now seen corresponding path program 1 times [2021-11-05 16:43:04,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:04,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963718702] [2021-11-05 16:43:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:04,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-05 16:43:05,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:05,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963718702] [2021-11-05 16:43:05,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963718702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:05,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:05,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:43:05,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418053592] [2021-11-05 16:43:05,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:05,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:43:05,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:43:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:05,051 INFO L87 Difference]: Start difference. First operand 18279 states and 25739 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 16:43:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:05,634 INFO L93 Difference]: Finished difference Result 44717 states and 62949 transitions. [2021-11-05 16:43:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:43:05,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 59 [2021-11-05 16:43:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:05,700 INFO L225 Difference]: With dead ends: 44717 [2021-11-05 16:43:05,701 INFO L226 Difference]: Without dead ends: 26461 [2021-11-05 16:43:05,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.67ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:05,730 INFO L933 BasicCegarLoop]: 6560 mSDtfsCounter, 6183 mSDsluCounter, 6487 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6183 SdHoareTripleChecker+Valid, 13047 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.59ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:05,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6183 Valid, 13047 Invalid, 35 Unknown, 0 Unchecked, 17.31ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 44.59ms Time] [2021-11-05 16:43:05,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2021-11-05 16:43:06,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26437. [2021-11-05 16:43:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26437 states, 26436 states have (on average 1.4074746557724316) internal successors, (37208), 26436 states have internal predecessors, (37208), 0 states have call successors, (0), 0 states 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 16:43:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26437 states to 26437 states and 37208 transitions. [2021-11-05 16:43:06,399 INFO L78 Accepts]: Start accepts. Automaton has 26437 states and 37208 transitions. Word has length 59 [2021-11-05 16:43:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:06,399 INFO L470 AbstractCegarLoop]: Abstraction has 26437 states and 37208 transitions. [2021-11-05 16:43:06,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 16:43:06,400 INFO L276 IsEmpty]: Start isEmpty. Operand 26437 states and 37208 transitions. [2021-11-05 16:43:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-05 16:43:06,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:06,409 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:06,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 16:43:06,409 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1015760832, now seen corresponding path program 2 times [2021-11-05 16:43:06,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:06,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978803550] [2021-11-05 16:43:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:06,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:43:06,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:06,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978803550] [2021-11-05 16:43:06,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978803550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:06,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:06,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:43:06,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032466969] [2021-11-05 16:43:06,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:06,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:43:06,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:43:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:06,614 INFO L87 Difference]: Start difference. First operand 26437 states and 37208 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 16:43:07,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:07,404 INFO L93 Difference]: Finished difference Result 52913 states and 74493 transitions. [2021-11-05 16:43:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:43:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-05 16:43:07,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:07,498 INFO L225 Difference]: With dead ends: 52913 [2021-11-05 16:43:07,499 INFO L226 Difference]: Without dead ends: 35133 [2021-11-05 16:43:07,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.59ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:07,542 INFO L933 BasicCegarLoop]: 12696 mSDtfsCounter, 6217 mSDsluCounter, 6470 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 226.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6217 SdHoareTripleChecker+Valid, 19166 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.43ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 253.36ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:07,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6217 Valid, 19166 Invalid, 55 Unknown, 0 Unchecked, 21.43ms Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 253.36ms Time] [2021-11-05 16:43:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35133 states. [2021-11-05 16:43:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35133 to 35109. [2021-11-05 16:43:08,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35109 states, 35108 states have (on average 1.4074854733963769) internal successors, (49414), 35108 states have internal predecessors, (49414), 0 states have call successors, (0), 0 states 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 16:43:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35109 states to 35109 states and 49414 transitions. [2021-11-05 16:43:08,556 INFO L78 Accepts]: Start accepts. Automaton has 35109 states and 49414 transitions. Word has length 59 [2021-11-05 16:43:08,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:08,559 INFO L470 AbstractCegarLoop]: Abstraction has 35109 states and 49414 transitions. [2021-11-05 16:43:08,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 16:43:08,559 INFO L276 IsEmpty]: Start isEmpty. Operand 35109 states and 49414 transitions. [2021-11-05 16:43:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-05 16:43:08,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:08,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:08,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 16:43:08,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash -591221986, now seen corresponding path program 1 times [2021-11-05 16:43:08,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:08,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261020311] [2021-11-05 16:43:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:08,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-05 16:43:08,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:08,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261020311] [2021-11-05 16:43:08,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261020311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:08,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:08,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:43:08,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113419706] [2021-11-05 16:43:08,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:08,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:43:08,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:08,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:43:08,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:08,699 INFO L87 Difference]: Start difference. First operand 35109 states and 49414 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 16:43:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:09,587 INFO L93 Difference]: Finished difference Result 70257 states and 98905 transitions. [2021-11-05 16:43:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:43:09,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 73 [2021-11-05 16:43:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:09,698 INFO L225 Difference]: With dead ends: 70257 [2021-11-05 16:43:09,698 INFO L226 Difference]: Without dead ends: 43805 [2021-11-05 16:43:09,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.77ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:09,748 INFO L933 BasicCegarLoop]: 12719 mSDtfsCounter, 6264 mSDsluCounter, 6426 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6264 SdHoareTripleChecker+Valid, 19145 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.54ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 220.06ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:09,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6264 Valid, 19145 Invalid, 56 Unknown, 0 Unchecked, 16.54ms Time], IncrementalHoareTripleChecker [17 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 220.06ms Time] [2021-11-05 16:43:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43805 states. [2021-11-05 16:43:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43805 to 43781. [2021-11-05 16:43:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43781 states, 43780 states have (on average 1.4074920054819553) internal successors, (61620), 43780 states have internal predecessors, (61620), 0 states have call successors, (0), 0 states 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 16:43:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43781 states to 43781 states and 61620 transitions. [2021-11-05 16:43:11,062 INFO L78 Accepts]: Start accepts. Automaton has 43781 states and 61620 transitions. Word has length 73 [2021-11-05 16:43:11,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:11,062 INFO L470 AbstractCegarLoop]: Abstraction has 43781 states and 61620 transitions. [2021-11-05 16:43:11,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 16:43:11,063 INFO L276 IsEmpty]: Start isEmpty. Operand 43781 states and 61620 transitions. [2021-11-05 16:43:11,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-05 16:43:11,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:11,098 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:11,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-05 16:43:11,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:11,099 INFO L85 PathProgramCache]: Analyzing trace with hash 638916036, now seen corresponding path program 1 times [2021-11-05 16:43:11,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:11,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895891104] [2021-11-05 16:43:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:11,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-05 16:43:11,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:11,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895891104] [2021-11-05 16:43:11,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895891104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:11,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:11,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:43:11,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366496996] [2021-11-05 16:43:11,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:11,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:43:11,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:43:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:43:11,188 INFO L87 Difference]: Start difference. First operand 43781 states and 61620 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:43:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:12,375 INFO L93 Difference]: Finished difference Result 96467 states and 135773 transitions. [2021-11-05 16:43:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:43:12,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-05 16:43:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:12,509 INFO L225 Difference]: With dead ends: 96467 [2021-11-05 16:43:12,509 INFO L226 Difference]: Without dead ends: 61343 [2021-11-05 16:43:12,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.01ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:43:12,585 INFO L933 BasicCegarLoop]: 12871 mSDtfsCounter, 12603 mSDsluCounter, 13135 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12603 SdHoareTripleChecker+Valid, 26006 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.64ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.35ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:12,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12603 Valid, 26006 Invalid, 14 Unknown, 0 Unchecked, 24.64ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 125.35ms Time] [2021-11-05 16:43:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61343 states. [2021-11-05 16:43:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61343 to 43785. [2021-11-05 16:43:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43785 states, 43784 states have (on average 1.4074547780010962) internal successors, (61624), 43784 states have internal predecessors, (61624), 0 states have call successors, (0), 0 states 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 16:43:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 61624 transitions. [2021-11-05 16:43:13,608 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 61624 transitions. Word has length 86 [2021-11-05 16:43:13,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:13,608 INFO L470 AbstractCegarLoop]: Abstraction has 43785 states and 61624 transitions. [2021-11-05 16:43:13,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:43:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 61624 transitions. [2021-11-05 16:43:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-05 16:43:13,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:13,628 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:13,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-05 16:43:13,628 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash -280928408, now seen corresponding path program 1 times [2021-11-05 16:43:13,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:13,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655855133] [2021-11-05 16:43:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:13,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:13,717 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-05 16:43:13,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:13,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655855133] [2021-11-05 16:43:13,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655855133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:13,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:13,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:43:13,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037919366] [2021-11-05 16:43:13,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:13,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:43:13,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:43:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:13,721 INFO L87 Difference]: Start difference. First operand 43785 states and 61624 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 16:43:15,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:15,514 INFO L93 Difference]: Finished difference Result 107888 states and 151875 transitions. [2021-11-05 16:43:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:43:15,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 88 [2021-11-05 16:43:15,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:15,639 INFO L225 Difference]: With dead ends: 107888 [2021-11-05 16:43:15,639 INFO L226 Difference]: Without dead ends: 85728 [2021-11-05 16:43:15,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.66ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:15,676 INFO L933 BasicCegarLoop]: 12611 mSDtfsCounter, 6278 mSDsluCounter, 6277 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 153.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6278 SdHoareTripleChecker+Valid, 18888 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.37ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 190.78ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:15,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6278 Valid, 18888 Invalid, 178 Unknown, 0 Unchecked, 23.37ms Time], IncrementalHoareTripleChecker [88 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 190.78ms Time] [2021-11-05 16:43:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85728 states. [2021-11-05 16:43:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85728 to 44061. [2021-11-05 16:43:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44061 states, 44060 states have (on average 1.4049024058102588) internal successors, (61900), 44060 states have internal predecessors, (61900), 0 states have call successors, (0), 0 states 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 16:43:17,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44061 states to 44061 states and 61900 transitions. [2021-11-05 16:43:17,068 INFO L78 Accepts]: Start accepts. Automaton has 44061 states and 61900 transitions. Word has length 88 [2021-11-05 16:43:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:17,069 INFO L470 AbstractCegarLoop]: Abstraction has 44061 states and 61900 transitions. [2021-11-05 16:43:17,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 16:43:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 44061 states and 61900 transitions. [2021-11-05 16:43:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-05 16:43:17,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:17,093 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:17,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-05 16:43:17,094 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:17,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:17,094 INFO L85 PathProgramCache]: Analyzing trace with hash -284281593, now seen corresponding path program 1 times [2021-11-05 16:43:17,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:17,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153296430] [2021-11-05 16:43:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:17,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-05 16:43:17,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:17,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153296430] [2021-11-05 16:43:17,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153296430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:17,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:17,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:43:17,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170543998] [2021-11-05 16:43:17,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:17,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:43:17,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:17,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:43:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:43:17,223 INFO L87 Difference]: Start difference. First operand 44061 states and 61900 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 16:43:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:18,958 INFO L93 Difference]: Finished difference Result 108434 states and 152250 transitions. [2021-11-05 16:43:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-05 16:43:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 90 [2021-11-05 16:43:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:19,071 INFO L225 Difference]: With dead ends: 108434 [2021-11-05 16:43:19,072 INFO L226 Difference]: Without dead ends: 64396 [2021-11-05 16:43:19,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.40ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:43:19,117 INFO L933 BasicCegarLoop]: 12569 mSDtfsCounter, 12360 mSDsluCounter, 12405 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12360 SdHoareTripleChecker+Valid, 24974 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.07ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 493.04ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:19,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12360 Valid, 24974 Invalid, 320 Unknown, 0 Unchecked, 21.07ms Time], IncrementalHoareTripleChecker [59 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 493.04ms Time] [2021-11-05 16:43:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64396 states. [2021-11-05 16:43:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64396 to 43647. [2021-11-05 16:43:20,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43647 states, 43646 states have (on average 1.3992576639325482) internal successors, (61072), 43646 states have internal predecessors, (61072), 0 states have call successors, (0), 0 states 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 16:43:20,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43647 states to 43647 states and 61072 transitions. [2021-11-05 16:43:20,297 INFO L78 Accepts]: Start accepts. Automaton has 43647 states and 61072 transitions. Word has length 90 [2021-11-05 16:43:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:20,297 INFO L470 AbstractCegarLoop]: Abstraction has 43647 states and 61072 transitions. [2021-11-05 16:43:20,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states 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 16:43:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 43647 states and 61072 transitions. [2021-11-05 16:43:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-05 16:43:20,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:20,315 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:20,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-05 16:43:20,316 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash 298726998, now seen corresponding path program 1 times [2021-11-05 16:43:20,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:20,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810884640] [2021-11-05 16:43:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:20,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:43:20,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:20,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810884640] [2021-11-05 16:43:20,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810884640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:20,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:20,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:43:20,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778465149] [2021-11-05 16:43:20,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:20,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:43:20,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:43:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:20,407 INFO L87 Difference]: Start difference. First operand 43647 states and 61072 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:43:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:22,431 INFO L93 Difference]: Finished difference Result 127145 states and 178332 transitions. [2021-11-05 16:43:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:43:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-05 16:43:22,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:22,564 INFO L225 Difference]: With dead ends: 127145 [2021-11-05 16:43:22,564 INFO L226 Difference]: Without dead ends: 83521 [2021-11-05 16:43:22,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.62ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:43:22,622 INFO L933 BasicCegarLoop]: 10940 mSDtfsCounter, 5966 mSDsluCounter, 6439 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 382.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5966 SdHoareTripleChecker+Valid, 17379 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.78ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 426.92ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:22,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5966 Valid, 17379 Invalid, 196 Unknown, 0 Unchecked, 13.78ms Time], IncrementalHoareTripleChecker [46 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 426.92ms Time] [2021-11-05 16:43:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83521 states. [2021-11-05 16:43:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83521 to 53877. [2021-11-05 16:43:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53877 states, 53876 states have (on average 1.394164377459351) internal successors, (75112), 53876 states have internal predecessors, (75112), 0 states have call successors, (0), 0 states 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 16:43:24,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53877 states to 53877 states and 75112 transitions. [2021-11-05 16:43:24,213 INFO L78 Accepts]: Start accepts. Automaton has 53877 states and 75112 transitions. Word has length 90 [2021-11-05 16:43:24,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:24,213 INFO L470 AbstractCegarLoop]: Abstraction has 53877 states and 75112 transitions. [2021-11-05 16:43:24,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:43:24,213 INFO L276 IsEmpty]: Start isEmpty. Operand 53877 states and 75112 transitions. [2021-11-05 16:43:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-05 16:43:24,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:24,228 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:24,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-05 16:43:24,228 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash -545278504, now seen corresponding path program 1 times [2021-11-05 16:43:24,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:24,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292450415] [2021-11-05 16:43:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:24,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:43:24,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:24,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292450415] [2021-11-05 16:43:24,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292450415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:24,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:24,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-05 16:43:24,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126220961] [2021-11-05 16:43:24,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:24,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-05 16:43:24,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-05 16:43:24,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-05 16:43:24,323 INFO L87 Difference]: Start difference. First operand 53877 states and 75112 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:43:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:43:28,670 INFO L93 Difference]: Finished difference Result 240322 states and 335555 transitions. [2021-11-05 16:43:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-05 16:43:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-05 16:43:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:43:29,008 INFO L225 Difference]: With dead ends: 240322 [2021-11-05 16:43:29,009 INFO L226 Difference]: Without dead ends: 186468 [2021-11-05 16:43:29,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.04ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-05 16:43:29,098 INFO L933 BasicCegarLoop]: 11451 mSDtfsCounter, 19234 mSDsluCounter, 17923 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19234 SdHoareTripleChecker+Valid, 29374 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.90ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.02ms IncrementalHoareTripleChecker+Time [2021-11-05 16:43:29,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19234 Valid, 29374 Invalid, 128 Unknown, 0 Unchecked, 35.90ms Time], IncrementalHoareTripleChecker [27 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 86.02ms Time] [2021-11-05 16:43:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186468 states. [2021-11-05 16:43:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186468 to 54117. [2021-11-05 16:43:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54117 states, 54116 states have (on average 1.3924162909305935) internal successors, (75352), 54116 states have internal predecessors, (75352), 0 states have call successors, (0), 0 states 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 16:43:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54117 states to 54117 states and 75352 transitions. [2021-11-05 16:43:31,775 INFO L78 Accepts]: Start accepts. Automaton has 54117 states and 75352 transitions. Word has length 90 [2021-11-05 16:43:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:43:31,775 INFO L470 AbstractCegarLoop]: Abstraction has 54117 states and 75352 transitions. [2021-11-05 16:43:31,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:43:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 54117 states and 75352 transitions. [2021-11-05 16:43:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-05 16:43:31,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:43:31,788 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:43:31,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-05 16:43:31,789 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-05 16:43:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:43:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 735356708, now seen corresponding path program 1 times [2021-11-05 16:43:31,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:43:31,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390702006] [2021-11-05 16:43:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:43:31,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:43:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:43:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:43:33,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:43:33,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390702006] [2021-11-05 16:43:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390702006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:43:33,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:43:33,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-05 16:43:33,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866406657] [2021-11-05 16:43:33,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:43:33,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-05 16:43:33,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:43:33,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-05 16:43:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-05 16:43:33,059 INFO L87 Difference]: Start difference. First operand 54117 states and 75352 transitions. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 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)