./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.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 8954b1975c9ef274050a4ed05b880cddaf4747278343623028f38a4ef8e6ca73 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 16:19:44,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 16:19:44,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 16:19:44,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 16:19:44,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 16:19:44,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 16:19:44,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 16:19:44,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 16:19:44,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 16:19:44,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 16:19:44,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 16:19:44,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 16:19:44,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 16:19:44,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 16:19:44,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 16:19:44,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 16:19:44,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 16:19:44,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 16:19:44,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 16:19:44,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 16:19:44,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 16:19:44,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 16:19:44,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 16:19:44,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 16:19:44,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 16:19:44,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 16:19:44,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 16:19:44,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 16:19:44,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 16:19:44,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 16:19:44,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 16:19:44,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 16:19:44,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 16:19:44,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 16:19:44,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 16:19:44,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 16:19:44,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 16:19:44,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 16:19:44,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 16:19:44,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 16:19:44,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 16:19:44,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 16:19:44,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 16:19:44,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 16:19:44,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 16:19:44,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 16:19:44,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 16:19:44,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 16:19:44,371 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 16:19:44,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 16:19:44,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 16:19:44,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 16:19:44,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 16:19:44,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 16:19:44,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 16:19:44,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 16:19:44,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 16:19:44,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 16:19:44,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 16:19:44,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 16:19:44,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 16:19:44,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 16:19:44,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 16:19:44,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 16:19:44,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 16:19:44,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 16:19:44,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 16:19:44,374 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 16:19:44,375 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 16:19:44,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 16:19:44,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 16:19:44,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8954b1975c9ef274050a4ed05b880cddaf4747278343623028f38a4ef8e6ca73 [2021-11-06 16:19:44,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 16:19:44,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 16:19:44,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 16:19:44,611 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 16:19:44,613 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 16:19:44,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2021-11-06 16:19:44,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6805082c1/3f0325481c37410888553550fba5947f/FLAG5699a539c [2021-11-06 16:19:45,138 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 16:19:45,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2021-11-06 16:19:45,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6805082c1/3f0325481c37410888553550fba5947f/FLAG5699a539c [2021-11-06 16:19:45,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6805082c1/3f0325481c37410888553550fba5947f [2021-11-06 16:19:45,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 16:19:45,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 16:19:45,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 16:19:45,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 16:19:45,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 16:19:45,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:19:45" (1/1) ... [2021-11-06 16:19:45,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de18f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:45, skipping insertion in model container [2021-11-06 16:19:45,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 04:19:45" (1/1) ... [2021-11-06 16:19:45,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 16:19:45,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 16:19:45,995 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i[115866,115879] [2021-11-06 16:19:46,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 16:19:46,044 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 16:19:46,116 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-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i[115866,115879] [2021-11-06 16:19:46,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 16:19:46,164 INFO L208 MainTranslator]: Completed translation [2021-11-06 16:19:46,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46 WrapperNode [2021-11-06 16:19:46,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 16:19:46,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 16:19:46,165 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 16:19:46,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 16:19:46,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 16:19:46,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 16:19:46,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 16:19:46,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 16:19:46,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 16:19:46,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 16:19:46,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 16:19:46,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 16:19:46,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (1/1) ... [2021-11-06 16:19:46,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 16:19:46,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:19:46,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 16:19:46,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 16:19:46,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 16:19:46,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 16:19:46,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 16:19:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 16:19:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 16:19:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 16:19:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 16:19:46,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 16:19:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 16:19:46,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 16:19:46,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 16:19:50,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 16:19:50,001 INFO L299 CfgBuilder]: Removed 1175 assume(true) statements. [2021-11-06 16:19:50,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:19:50 BoogieIcfgContainer [2021-11-06 16:19:50,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 16:19:50,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 16:19:50,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 16:19:50,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 16:19:50,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 04:19:45" (1/3) ... [2021-11-06 16:19:50,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9eabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:19:50, skipping insertion in model container [2021-11-06 16:19:50,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 04:19:46" (2/3) ... [2021-11-06 16:19:50,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9eabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 04:19:50, skipping insertion in model container [2021-11-06 16:19:50,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 04:19:50" (3/3) ... [2021-11-06 16:19:50,010 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2021-11-06 16:19:50,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 16:19:50,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 16:19:50,047 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 16:19:50,051 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 16:19:50,052 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 16:19:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 531 states, 529 states have (on average 1.1909262759924386) internal successors, (630), 530 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-06 16:19:50,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:50,075 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:50,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:50,079 INFO L85 PathProgramCache]: Analyzing trace with hash -292241257, now seen corresponding path program 1 times [2021-11-06 16:19:50,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:50,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918980091] [2021-11-06 16:19:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:50,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:50,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:50,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918980091] [2021-11-06 16:19:50,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918980091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:50,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:50,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 16:19:50,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594958147] [2021-11-06 16:19:50,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 16:19:50,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 16:19:50,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 16:19:50,297 INFO L87 Difference]: Start difference. First operand has 531 states, 529 states have (on average 1.1909262759924386) internal successors, (630), 530 states have internal predecessors, (630), 0 states have call successors, (0), 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 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:50,341 INFO L93 Difference]: Finished difference Result 1058 states and 1255 transitions. [2021-11-06 16:19:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 16:19:50,342 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-06 16:19:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:50,352 INFO L225 Difference]: With dead ends: 1058 [2021-11-06 16:19:50,354 INFO L226 Difference]: Without dead ends: 523 [2021-11-06 16:19:50,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 16:19:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-06 16:19:50,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2021-11-06 16:19:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.1628352490421456) internal successors, (607), 522 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 607 transitions. [2021-11-06 16:19:50,428 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 607 transitions. Word has length 52 [2021-11-06 16:19:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:50,429 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 607 transitions. [2021-11-06 16:19:50,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 607 transitions. [2021-11-06 16:19:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-06 16:19:50,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:50,431 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:50,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 16:19:50,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:50,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1668904607, now seen corresponding path program 1 times [2021-11-06 16:19:50,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:50,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614181691] [2021-11-06 16:19:50,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:50,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:50,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:50,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614181691] [2021-11-06 16:19:50,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614181691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:50,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:50,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:50,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699590317] [2021-11-06 16:19:50,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:50,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:50,543 INFO L87 Difference]: Start difference. First operand 523 states and 607 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:50,652 INFO L93 Difference]: Finished difference Result 1376 states and 1609 transitions. [2021-11-06 16:19:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:50,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-06 16:19:50,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:50,658 INFO L225 Difference]: With dead ends: 1376 [2021-11-06 16:19:50,658 INFO L226 Difference]: Without dead ends: 890 [2021-11-06 16:19:50,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:50,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-06 16:19:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2021-11-06 16:19:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 1.172103487064117) internal successors, (1042), 889 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1042 transitions. [2021-11-06 16:19:50,685 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1042 transitions. Word has length 52 [2021-11-06 16:19:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:50,686 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1042 transitions. [2021-11-06 16:19:50,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1042 transitions. [2021-11-06 16:19:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 16:19:50,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:50,688 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:50,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 16:19:50,688 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:50,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1879376752, now seen corresponding path program 1 times [2021-11-06 16:19:50,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:50,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403542956] [2021-11-06 16:19:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:50,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:50,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:50,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403542956] [2021-11-06 16:19:50,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403542956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:50,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:50,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 16:19:50,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275800861] [2021-11-06 16:19:50,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 16:19:50,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 16:19:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 16:19:50,776 INFO L87 Difference]: Start difference. First operand 890 states and 1042 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:50,868 INFO L93 Difference]: Finished difference Result 1749 states and 2048 transitions. [2021-11-06 16:19:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 16:19:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-06 16:19:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:50,871 INFO L225 Difference]: With dead ends: 1749 [2021-11-06 16:19:50,872 INFO L226 Difference]: Without dead ends: 896 [2021-11-06 16:19:50,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-11-06 16:19:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 893. [2021-11-06 16:19:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.1715246636771302) internal successors, (1045), 892 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1045 transitions. [2021-11-06 16:19:50,889 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1045 transitions. Word has length 53 [2021-11-06 16:19:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:50,890 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1045 transitions. [2021-11-06 16:19:50,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1045 transitions. [2021-11-06 16:19:50,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 16:19:50,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:50,891 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:50,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 16:19:50,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1879436334, now seen corresponding path program 1 times [2021-11-06 16:19:50,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:50,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909228559] [2021-11-06 16:19:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:50,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:51,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:51,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909228559] [2021-11-06 16:19:51,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909228559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:51,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:51,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 16:19:51,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434231189] [2021-11-06 16:19:51,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:51,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:51,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:51,010 INFO L87 Difference]: Start difference. First operand 893 states and 1045 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:51,039 INFO L93 Difference]: Finished difference Result 1749 states and 2047 transitions. [2021-11-06 16:19:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:51,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-06 16:19:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:51,045 INFO L225 Difference]: With dead ends: 1749 [2021-11-06 16:19:51,045 INFO L226 Difference]: Without dead ends: 1719 [2021-11-06 16:19:51,046 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-11-06 16:19:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2021-11-06 16:19:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.1717112922002328) internal successors, (2013), 1718 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2013 transitions. [2021-11-06 16:19:51,084 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2013 transitions. Word has length 53 [2021-11-06 16:19:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:51,084 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 2013 transitions. [2021-11-06 16:19:51,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2013 transitions. [2021-11-06 16:19:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-06 16:19:51,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:51,087 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:51,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 16:19:51,088 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1513527943, now seen corresponding path program 1 times [2021-11-06 16:19:51,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:51,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367827723] [2021-11-06 16:19:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:51,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 16:19:51,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:51,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367827723] [2021-11-06 16:19:51,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367827723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:51,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:51,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:51,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168114764] [2021-11-06 16:19:51,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:51,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:51,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:51,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:51,172 INFO L87 Difference]: Start difference. First operand 1719 states and 2013 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:53,278 INFO L93 Difference]: Finished difference Result 3613 states and 4249 transitions. [2021-11-06 16:19:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-06 16:19:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:53,283 INFO L225 Difference]: With dead ends: 3613 [2021-11-06 16:19:53,283 INFO L226 Difference]: Without dead ends: 1931 [2021-11-06 16:19:53,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:53,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2021-11-06 16:19:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1883. [2021-11-06 16:19:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1882 states have (on average 1.1806588735387886) internal successors, (2222), 1882 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 2222 transitions. [2021-11-06 16:19:53,321 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 2222 transitions. Word has length 100 [2021-11-06 16:19:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:53,322 INFO L470 AbstractCegarLoop]: Abstraction has 1883 states and 2222 transitions. [2021-11-06 16:19:53,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:53,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 2222 transitions. [2021-11-06 16:19:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-06 16:19:53,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:53,325 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:53,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 16:19:53,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:53,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1292321500, now seen corresponding path program 1 times [2021-11-06 16:19:53,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:53,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664053948] [2021-11-06 16:19:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:53,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:53,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:53,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664053948] [2021-11-06 16:19:53,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664053948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:19:53,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570738079] [2021-11-06 16:19:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:53,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:19:53,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:19:53,472 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:19:53,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 16:19:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:53,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 16:19:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:19:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:54,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570738079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:54,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 16:19:54,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-06 16:19:54,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532968797] [2021-11-06 16:19:54,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 16:19:54,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:54,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 16:19:54,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:54,248 INFO L87 Difference]: Start difference. First operand 1883 states and 2222 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:54,374 INFO L93 Difference]: Finished difference Result 5554 states and 6557 transitions. [2021-11-06 16:19:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 16:19:54,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-06 16:19:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:54,420 INFO L225 Difference]: With dead ends: 5554 [2021-11-06 16:19:54,420 INFO L226 Difference]: Without dead ends: 5527 [2021-11-06 16:19:54,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5527 states. [2021-11-06 16:19:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5527 to 5319. [2021-11-06 16:19:54,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5319 states, 5318 states have (on average 1.188040616773223) internal successors, (6318), 5318 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 6318 transitions. [2021-11-06 16:19:54,659 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 6318 transitions. Word has length 131 [2021-11-06 16:19:54,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:54,661 INFO L470 AbstractCegarLoop]: Abstraction has 5319 states and 6318 transitions. [2021-11-06 16:19:54,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 6318 transitions. [2021-11-06 16:19:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-06 16:19:54,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:54,667 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:54,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-06 16:19:54,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-06 16:19:54,884 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1981577442, now seen corresponding path program 1 times [2021-11-06 16:19:54,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:54,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98656859] [2021-11-06 16:19:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:54,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:54,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:54,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98656859] [2021-11-06 16:19:54,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98656859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:54,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:54,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 16:19:54,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297509865] [2021-11-06 16:19:54,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:19:54,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:54,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:19:54,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:54,980 INFO L87 Difference]: Start difference. First operand 5319 states and 6318 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:55,456 INFO L93 Difference]: Finished difference Result 26339 states and 31237 transitions. [2021-11-06 16:19:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 16:19:55,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-06 16:19:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:55,519 INFO L225 Difference]: With dead ends: 26339 [2021-11-06 16:19:55,519 INFO L226 Difference]: Without dead ends: 21057 [2021-11-06 16:19:55,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 16:19:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21057 states. [2021-11-06 16:19:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21057 to 5203. [2021-11-06 16:19:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 5202 states have (on average 1.1906958861976162) internal successors, (6194), 5202 states have internal predecessors, (6194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 6194 transitions. [2021-11-06 16:19:55,838 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 6194 transitions. Word has length 131 [2021-11-06 16:19:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:55,838 INFO L470 AbstractCegarLoop]: Abstraction has 5203 states and 6194 transitions. [2021-11-06 16:19:55,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 6194 transitions. [2021-11-06 16:19:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-06 16:19:55,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:55,843 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:55,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 16:19:55,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash 275740233, now seen corresponding path program 1 times [2021-11-06 16:19:55,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:55,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030999367] [2021-11-06 16:19:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:55,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:55,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:55,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030999367] [2021-11-06 16:19:55,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030999367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:55,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:55,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:55,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315257287] [2021-11-06 16:19:55,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:55,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:55,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:55,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:55,921 INFO L87 Difference]: Start difference. First operand 5203 states and 6194 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:56,160 INFO L93 Difference]: Finished difference Result 10369 states and 12345 transitions. [2021-11-06 16:19:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-06 16:19:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:56,169 INFO L225 Difference]: With dead ends: 10369 [2021-11-06 16:19:56,170 INFO L226 Difference]: Without dead ends: 5048 [2021-11-06 16:19:56,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states. [2021-11-06 16:19:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 5008. [2021-11-06 16:19:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5008 states, 5007 states have (on average 1.182344717395646) internal successors, (5920), 5007 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5008 states to 5008 states and 5920 transitions. [2021-11-06 16:19:56,340 INFO L78 Accepts]: Start accepts. Automaton has 5008 states and 5920 transitions. Word has length 132 [2021-11-06 16:19:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:56,340 INFO L470 AbstractCegarLoop]: Abstraction has 5008 states and 5920 transitions. [2021-11-06 16:19:56,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 5008 states and 5920 transitions. [2021-11-06 16:19:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-06 16:19:56,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:56,345 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:56,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 16:19:56,345 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:56,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1410439605, now seen corresponding path program 1 times [2021-11-06 16:19:56,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:56,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519631144] [2021-11-06 16:19:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:56,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 16:19:56,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:56,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519631144] [2021-11-06 16:19:56,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519631144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:56,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:56,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:56,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374675713] [2021-11-06 16:19:56,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:56,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:56,406 INFO L87 Difference]: Start difference. First operand 5008 states and 5920 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:56,542 INFO L93 Difference]: Finished difference Result 7251 states and 8582 transitions. [2021-11-06 16:19:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:56,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-11-06 16:19:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:56,546 INFO L225 Difference]: With dead ends: 7251 [2021-11-06 16:19:56,546 INFO L226 Difference]: Without dead ends: 2270 [2021-11-06 16:19:56,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-11-06 16:19:56,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2270. [2021-11-06 16:19:56,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 1.1868664609960335) internal successors, (2693), 2269 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 2693 transitions. [2021-11-06 16:19:56,604 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 2693 transitions. Word has length 132 [2021-11-06 16:19:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:56,605 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 2693 transitions. [2021-11-06 16:19:56,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 2693 transitions. [2021-11-06 16:19:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-06 16:19:56,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:56,608 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:56,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 16:19:56,608 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:56,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1635296256, now seen corresponding path program 1 times [2021-11-06 16:19:56,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:56,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022793416] [2021-11-06 16:19:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:56,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 16:19:56,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:56,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022793416] [2021-11-06 16:19:56,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022793416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:56,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:56,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 16:19:56,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951836253] [2021-11-06 16:19:56,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:56,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:56,713 INFO L87 Difference]: Start difference. First operand 2270 states and 2693 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:56,866 INFO L93 Difference]: Finished difference Result 6408 states and 7639 transitions. [2021-11-06 16:19:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-06 16:19:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:56,873 INFO L225 Difference]: With dead ends: 6408 [2021-11-06 16:19:56,873 INFO L226 Difference]: Without dead ends: 4303 [2021-11-06 16:19:56,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4303 states. [2021-11-06 16:19:57,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4303 to 4118. [2021-11-06 16:19:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4118 states, 4117 states have (on average 1.1977167840660676) internal successors, (4931), 4117 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 4931 transitions. [2021-11-06 16:19:57,038 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 4931 transitions. Word has length 160 [2021-11-06 16:19:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:57,038 INFO L470 AbstractCegarLoop]: Abstraction has 4118 states and 4931 transitions. [2021-11-06 16:19:57,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 4931 transitions. [2021-11-06 16:19:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-06 16:19:57,045 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:57,045 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:57,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 16:19:57,046 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:57,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1756946129, now seen corresponding path program 1 times [2021-11-06 16:19:57,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:57,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695343560] [2021-11-06 16:19:57,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:57,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 16:19:57,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:57,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695343560] [2021-11-06 16:19:57,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695343560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:57,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:57,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 16:19:57,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885717744] [2021-11-06 16:19:57,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:19:57,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:57,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:19:57,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:57,184 INFO L87 Difference]: Start difference. First operand 4118 states and 4931 transitions. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:57,489 INFO L93 Difference]: Finished difference Result 12139 states and 14543 transitions. [2021-11-06 16:19:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:19:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-11-06 16:19:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:57,501 INFO L225 Difference]: With dead ends: 12139 [2021-11-06 16:19:57,501 INFO L226 Difference]: Without dead ends: 8099 [2021-11-06 16:19:57,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:19:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2021-11-06 16:19:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 4118. [2021-11-06 16:19:57,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4118 states, 4117 states have (on average 1.1974738887539471) internal successors, (4930), 4117 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 4930 transitions. [2021-11-06 16:19:57,641 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 4930 transitions. Word has length 171 [2021-11-06 16:19:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:57,642 INFO L470 AbstractCegarLoop]: Abstraction has 4118 states and 4930 transitions. [2021-11-06 16:19:57,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 4930 transitions. [2021-11-06 16:19:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-06 16:19:57,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:57,646 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:57,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 16:19:57,647 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:57,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1882887501, now seen corresponding path program 1 times [2021-11-06 16:19:57,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:57,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346829179] [2021-11-06 16:19:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:57,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-06 16:19:57,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:57,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346829179] [2021-11-06 16:19:57,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346829179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:57,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:57,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 16:19:57,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574581064] [2021-11-06 16:19:57,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:19:57,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:57,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:19:57,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:57,840 INFO L87 Difference]: Start difference. First operand 4118 states and 4930 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:57,970 INFO L93 Difference]: Finished difference Result 8220 states and 9847 transitions. [2021-11-06 16:19:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:19:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-06 16:19:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:57,977 INFO L225 Difference]: With dead ends: 8220 [2021-11-06 16:19:57,977 INFO L226 Difference]: Without dead ends: 4122 [2021-11-06 16:19:57,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 16:19:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-11-06 16:19:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 4122. [2021-11-06 16:19:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 1.1972822130550838) internal successors, (4934), 4121 states have internal predecessors, (4934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 4934 transitions. [2021-11-06 16:19:58,154 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 4934 transitions. Word has length 173 [2021-11-06 16:19:58,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:58,154 INFO L470 AbstractCegarLoop]: Abstraction has 4122 states and 4934 transitions. [2021-11-06 16:19:58,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 4934 transitions. [2021-11-06 16:19:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-06 16:19:58,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:58,159 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:58,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 16:19:58,160 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1725654031, now seen corresponding path program 1 times [2021-11-06 16:19:58,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:58,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437065765] [2021-11-06 16:19:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:58,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 16:19:58,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:58,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437065765] [2021-11-06 16:19:58,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437065765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:19:58,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570282049] [2021-11-06 16:19:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:58,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:19:58,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:19:58,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:19:58,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 16:19:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:58,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 16:19:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:19:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 16:19:59,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570282049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:59,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 16:19:59,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 16:19:59,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545659468] [2021-11-06 16:19:59,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:19:59,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:19:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:19:59,094 INFO L87 Difference]: Start difference. First operand 4122 states and 4934 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:19:59,359 INFO L93 Difference]: Finished difference Result 8090 states and 9696 transitions. [2021-11-06 16:19:59,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:19:59,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-06 16:19:59,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:19:59,366 INFO L225 Difference]: With dead ends: 8090 [2021-11-06 16:19:59,366 INFO L226 Difference]: Without dead ends: 4131 [2021-11-06 16:19:59,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-06 16:19:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-11-06 16:19:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4119. [2021-11-06 16:19:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4119 states, 4118 states have (on average 1.1971830985915493) internal successors, (4930), 4118 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4119 states to 4119 states and 4930 transitions. [2021-11-06 16:19:59,533 INFO L78 Accepts]: Start accepts. Automaton has 4119 states and 4930 transitions. Word has length 177 [2021-11-06 16:19:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:19:59,534 INFO L470 AbstractCegarLoop]: Abstraction has 4119 states and 4930 transitions. [2021-11-06 16:19:59,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:19:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4119 states and 4930 transitions. [2021-11-06 16:19:59,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-06 16:19:59,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:19:59,539 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:19:59,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 16:19:59,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-06 16:19:59,771 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:19:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:19:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1599541828, now seen corresponding path program 1 times [2021-11-06 16:19:59,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:19:59,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474982707] [2021-11-06 16:19:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:19:59,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:19:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:19:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-06 16:19:59,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:19:59,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474982707] [2021-11-06 16:19:59,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474982707] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:19:59,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 16:19:59,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 16:19:59,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815810857] [2021-11-06 16:19:59,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:19:59,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:19:59,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:19:59,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:19:59,943 INFO L87 Difference]: Start difference. First operand 4119 states and 4930 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:00,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:00,087 INFO L93 Difference]: Finished difference Result 8100 states and 9705 transitions. [2021-11-06 16:20:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:20:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 235 [2021-11-06 16:20:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:00,094 INFO L225 Difference]: With dead ends: 8100 [2021-11-06 16:20:00,094 INFO L226 Difference]: Without dead ends: 4119 [2021-11-06 16:20:00,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:20:00,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-11-06 16:20:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 4119. [2021-11-06 16:20:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4119 states, 4118 states have (on average 1.1969402622632346) internal successors, (4929), 4118 states have internal predecessors, (4929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4119 states to 4119 states and 4929 transitions. [2021-11-06 16:20:00,255 INFO L78 Accepts]: Start accepts. Automaton has 4119 states and 4929 transitions. Word has length 235 [2021-11-06 16:20:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:00,256 INFO L470 AbstractCegarLoop]: Abstraction has 4119 states and 4929 transitions. [2021-11-06 16:20:00,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:00,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4119 states and 4929 transitions. [2021-11-06 16:20:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-06 16:20:00,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:00,262 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:00,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 16:20:00,262 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:00,263 INFO L85 PathProgramCache]: Analyzing trace with hash -850421976, now seen corresponding path program 1 times [2021-11-06 16:20:00,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:00,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314266574] [2021-11-06 16:20:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:00,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 16:20:00,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:00,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314266574] [2021-11-06 16:20:00,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314266574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:00,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677386877] [2021-11-06 16:20:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:00,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:00,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:00,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:00,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 16:20:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:01,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 16:20:01,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 16:20:01,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677386877] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:01,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:01,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 16:20:01,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340831105] [2021-11-06 16:20:01,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 16:20:01,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 16:20:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:20:01,955 INFO L87 Difference]: Start difference. First operand 4119 states and 4929 transitions. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:02,158 INFO L93 Difference]: Finished difference Result 8221 states and 9844 transitions. [2021-11-06 16:20:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 16:20:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 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 237 [2021-11-06 16:20:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:02,165 INFO L225 Difference]: With dead ends: 8221 [2021-11-06 16:20:02,165 INFO L226 Difference]: Without dead ends: 4123 [2021-11-06 16:20:02,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 16:20:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-11-06 16:20:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 4123. [2021-11-06 16:20:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 4122 states have (on average 1.1967491508976225) internal successors, (4933), 4122 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 4933 transitions. [2021-11-06 16:20:02,292 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 4933 transitions. Word has length 237 [2021-11-06 16:20:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:02,292 INFO L470 AbstractCegarLoop]: Abstraction has 4123 states and 4933 transitions. [2021-11-06 16:20:02,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 4933 transitions. [2021-11-06 16:20:02,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-06 16:20:02,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:02,297 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:02,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:02,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:02,521 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:02,521 INFO L85 PathProgramCache]: Analyzing trace with hash -529309910, now seen corresponding path program 2 times [2021-11-06 16:20:02,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:02,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715328898] [2021-11-06 16:20:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:02,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-06 16:20:02,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:02,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715328898] [2021-11-06 16:20:02,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715328898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:02,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106630734] [2021-11-06 16:20:02,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 16:20:02,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:02,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:02,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:02,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 16:20:03,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 16:20:03,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 16:20:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 16:20:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:03,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-06 16:20:03,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106630734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 16:20:03,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 16:20:03,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-06 16:20:03,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137303804] [2021-11-06 16:20:03,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 16:20:03,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:03,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 16:20:03,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:20:03,772 INFO L87 Difference]: Start difference. First operand 4123 states and 4933 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:03,939 INFO L93 Difference]: Finished difference Result 8218 states and 9837 transitions. [2021-11-06 16:20:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 16:20:03,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 241 [2021-11-06 16:20:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:03,946 INFO L225 Difference]: With dead ends: 8218 [2021-11-06 16:20:03,947 INFO L226 Difference]: Without dead ends: 4125 [2021-11-06 16:20:03,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:20:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-11-06 16:20:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 4125. [2021-11-06 16:20:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4125 states, 4124 states have (on average 1.1966537342386032) internal successors, (4935), 4124 states have internal predecessors, (4935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4125 states to 4125 states and 4935 transitions. [2021-11-06 16:20:04,067 INFO L78 Accepts]: Start accepts. Automaton has 4125 states and 4935 transitions. Word has length 241 [2021-11-06 16:20:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:04,067 INFO L470 AbstractCegarLoop]: Abstraction has 4125 states and 4935 transitions. [2021-11-06 16:20:04,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4125 states and 4935 transitions. [2021-11-06 16:20:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-06 16:20:04,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:04,072 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:04,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:04,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-06 16:20:04,291 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:04,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:04,291 INFO L85 PathProgramCache]: Analyzing trace with hash 853407402, now seen corresponding path program 1 times [2021-11-06 16:20:04,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:04,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142599857] [2021-11-06 16:20:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:04,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-06 16:20:04,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:04,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142599857] [2021-11-06 16:20:04,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142599857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:04,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275898666] [2021-11-06 16:20:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:04,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:04,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:04,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 16:20:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:05,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-06 16:20:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-06 16:20:05,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275898666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:05,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:05,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 16:20:05,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267189883] [2021-11-06 16:20:05,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 16:20:05,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:05,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 16:20:05,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:20:05,928 INFO L87 Difference]: Start difference. First operand 4125 states and 4935 transitions. Second operand has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:06,232 INFO L93 Difference]: Finished difference Result 8232 states and 9855 transitions. [2021-11-06 16:20:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 16:20:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 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 243 [2021-11-06 16:20:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:06,238 INFO L225 Difference]: With dead ends: 8232 [2021-11-06 16:20:06,239 INFO L226 Difference]: Without dead ends: 4129 [2021-11-06 16:20:06,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 16:20:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2021-11-06 16:20:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4129. [2021-11-06 16:20:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4129 states, 4128 states have (on average 1.1964631782945736) internal successors, (4939), 4128 states have internal predecessors, (4939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 4939 transitions. [2021-11-06 16:20:06,417 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 4939 transitions. Word has length 243 [2021-11-06 16:20:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:06,418 INFO L470 AbstractCegarLoop]: Abstraction has 4129 states and 4939 transitions. [2021-11-06 16:20:06,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 4939 transitions. [2021-11-06 16:20:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-06 16:20:06,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:06,424 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:06,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:06,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-06 16:20:06,647 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1221638492, now seen corresponding path program 2 times [2021-11-06 16:20:06,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:06,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980939394] [2021-11-06 16:20:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:06,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-06 16:20:06,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:06,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980939394] [2021-11-06 16:20:06,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980939394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:06,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363145683] [2021-11-06 16:20:06,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 16:20:06,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:06,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:06,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:06,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 16:20:08,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 16:20:08,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 16:20:08,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 16:20:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-06 16:20:08,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363145683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:08,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:08,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 16:20:08,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74455062] [2021-11-06 16:20:08,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 16:20:08,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:08,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 16:20:08,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:20:08,983 INFO L87 Difference]: Start difference. First operand 4129 states and 4939 transitions. Second operand has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:09,206 INFO L93 Difference]: Finished difference Result 8239 states and 9862 transitions. [2021-11-06 16:20:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 16:20:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 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 247 [2021-11-06 16:20:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:09,214 INFO L225 Difference]: With dead ends: 8239 [2021-11-06 16:20:09,214 INFO L226 Difference]: Without dead ends: 4133 [2021-11-06 16:20:09,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-06 16:20:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-11-06 16:20:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 4133. [2021-11-06 16:20:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4132 states have (on average 1.196272991287512) internal successors, (4943), 4132 states have internal predecessors, (4943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 4943 transitions. [2021-11-06 16:20:09,379 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 4943 transitions. Word has length 247 [2021-11-06 16:20:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:09,380 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 4943 transitions. [2021-11-06 16:20:09,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.0) internal successors, (231), 7 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 4943 transitions. [2021-11-06 16:20:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-06 16:20:09,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:09,387 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:09,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:09,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-06 16:20:09,608 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:09,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1370638186, now seen corresponding path program 3 times [2021-11-06 16:20:09,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:09,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740974837] [2021-11-06 16:20:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:09,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-06 16:20:09,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:09,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740974837] [2021-11-06 16:20:09,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740974837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:09,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109734544] [2021-11-06 16:20:09,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 16:20:09,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:09,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:09,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:09,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 16:20:11,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 16:20:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 16:20:12,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 16:20:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-06 16:20:12,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109734544] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:12,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:12,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-11-06 16:20:12,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173550690] [2021-11-06 16:20:12,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 16:20:12,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 16:20:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-06 16:20:12,472 INFO L87 Difference]: Start difference. First operand 4133 states and 4943 transitions. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:12,811 INFO L93 Difference]: Finished difference Result 8248 states and 9873 transitions. [2021-11-06 16:20:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 16:20:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 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 251 [2021-11-06 16:20:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:12,818 INFO L225 Difference]: With dead ends: 8248 [2021-11-06 16:20:12,819 INFO L226 Difference]: Without dead ends: 4139 [2021-11-06 16:20:12,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-06 16:20:12,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-11-06 16:20:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 4139. [2021-11-06 16:20:12,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 1.19598840019333) internal successors, (4949), 4138 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 4949 transitions. [2021-11-06 16:20:12,938 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 4949 transitions. Word has length 251 [2021-11-06 16:20:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:12,938 INFO L470 AbstractCegarLoop]: Abstraction has 4139 states and 4949 transitions. [2021-11-06 16:20:12,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 4949 transitions. [2021-11-06 16:20:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-06 16:20:12,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:12,947 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:12,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:13,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:13,158 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:13,158 INFO L85 PathProgramCache]: Analyzing trace with hash 666642344, now seen corresponding path program 4 times [2021-11-06 16:20:13,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:13,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460516537] [2021-11-06 16:20:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:13,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-06 16:20:13,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:13,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460516537] [2021-11-06 16:20:13,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460516537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:13,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527677632] [2021-11-06 16:20:13,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 16:20:13,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:13,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:13,445 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:13,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 16:20:14,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 16:20:14,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 16:20:14,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2596 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 16:20:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 16:20:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-06 16:20:15,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527677632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:15,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 16:20:15,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-11-06 16:20:15,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152426465] [2021-11-06 16:20:15,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 16:20:15,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 16:20:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 16:20:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-06 16:20:15,318 INFO L87 Difference]: Start difference. First operand 4139 states and 4949 transitions. Second operand has 15 states, 15 states have (on average 16.466666666666665) internal successors, (247), 15 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 16:20:15,647 INFO L93 Difference]: Finished difference Result 8265 states and 9892 transitions. [2021-11-06 16:20:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 16:20:15,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 16.466666666666665) internal successors, (247), 15 states have internal predecessors, (247), 0 states have call successors, (0), 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 257 [2021-11-06 16:20:15,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 16:20:15,657 INFO L225 Difference]: With dead ends: 8265 [2021-11-06 16:20:15,657 INFO L226 Difference]: Without dead ends: 4151 [2021-11-06 16:20:15,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-06 16:20:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-11-06 16:20:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 4145. [2021-11-06 16:20:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 1.1957046332046333) internal successors, (4955), 4144 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 4955 transitions. [2021-11-06 16:20:15,777 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 4955 transitions. Word has length 257 [2021-11-06 16:20:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 16:20:15,777 INFO L470 AbstractCegarLoop]: Abstraction has 4145 states and 4955 transitions. [2021-11-06 16:20:15,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.466666666666665) internal successors, (247), 15 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 16:20:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 4955 transitions. [2021-11-06 16:20:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-06 16:20:15,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 16:20:15,782 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 16:20:15,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 16:20:15,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:16,000 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 16:20:16,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 16:20:16,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1860043606, now seen corresponding path program 5 times [2021-11-06 16:20:16,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 16:20:16,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106749330] [2021-11-06 16:20:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 16:20:16,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 16:20:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 16:20:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-06 16:20:16,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 16:20:16,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106749330] [2021-11-06 16:20:16,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106749330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 16:20:16,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888014838] [2021-11-06 16:20:16,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 16:20:16,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 16:20:16,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 16:20:16,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 16:20:16,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process Killed by 15