./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.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 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:32:32,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:32:32,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:32:32,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:32:32,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:32:32,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:32:32,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:32:32,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:32:32,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:32:32,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:32:32,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:32:32,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:32:32,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:32:32,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:32:32,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:32:32,368 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:32:32,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:32:32,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:32:32,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:32:32,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:32:32,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:32:32,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:32:32,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:32:32,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:32:32,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:32:32,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:32:32,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:32:32,393 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:32:32,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:32:32,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:32:32,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:32:32,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:32:32,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:32:32,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:32:32,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:32:32,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:32:32,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:32:32,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:32:32,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:32:32,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:32:32,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:32:32,403 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:32:32,430 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:32:32,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:32:32,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:32:32,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:32:32,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:32:32,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:32:32,434 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:32:32,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:32:32,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:32:32,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:32:32,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:32:32,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:32:32,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:32:32,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:32:32,436 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:32:32,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:32:32,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:32:32,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:32:32,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:32:32,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:32:32,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:32:32,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:32:32,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:32:32,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:32:32,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:32:32,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:32:32,439 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:32:32,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:32:32,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:32:32,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 [2021-11-06 14:32:32,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:32:32,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:32:32,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:32:32,690 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:32:32,691 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:32:32,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-06 14:32:32,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7afc5aae/183efaf7c8fb4a8d8e218dcf64f5e41e/FLAG33d3f1755 [2021-11-06 14:32:33,341 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:32:33,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-06 14:32:33,374 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7afc5aae/183efaf7c8fb4a8d8e218dcf64f5e41e/FLAG33d3f1755 [2021-11-06 14:32:33,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7afc5aae/183efaf7c8fb4a8d8e218dcf64f5e41e [2021-11-06 14:32:33,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:32:33,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:32:33,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:32:33,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:32:33,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:32:33,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:32:33" (1/1) ... [2021-11-06 14:32:33,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a89c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:33, skipping insertion in model container [2021-11-06 14:32:33,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:32:33" (1/1) ... [2021-11-06 14:32:33,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:32:33,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:32:34,394 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-06 14:32:34,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:32:34,724 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:32:34,834 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-11-06 14:32:34,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:32:34,973 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:32:34,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34 WrapperNode [2021-11-06 14:32:34,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:32:34,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:32:34,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:32:34,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:32:34,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,022 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:32:35,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:32:35,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:32:35,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:32:35,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:32:35,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:32:35,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:32:35,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:32:35,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (1/1) ... [2021-11-06 14:32:35,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:32:35,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:35,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 14:32:35,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 14:32:35,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:32:35,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:32:35,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:32:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:32:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:32:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:32:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:32:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:32:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:32:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:32:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:32:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:32:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:32:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:32:35,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:32:37,118 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:32:37,118 INFO L299 CfgBuilder]: Removed 198 assume(true) statements. [2021-11-06 14:32:37,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:32:37 BoogieIcfgContainer [2021-11-06 14:32:37,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:32:37,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:32:37,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:32:37,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:32:37,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:32:33" (1/3) ... [2021-11-06 14:32:37,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de0ef53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:32:37, skipping insertion in model container [2021-11-06 14:32:37,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:32:34" (2/3) ... [2021-11-06 14:32:37,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de0ef53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:32:37, skipping insertion in model container [2021-11-06 14:32:37,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:32:37" (3/3) ... [2021-11-06 14:32:37,130 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-11-06 14:32:37,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:32:37,138 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:32:37,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:32:37,190 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 14:32:37,190 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:32:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 296 states, 294 states have (on average 1.5374149659863945) internal successors, (452), 295 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-06 14:32:37,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:37,215 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:37,215 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:37,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1448866139, now seen corresponding path program 1 times [2021-11-06 14:32:37,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:37,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598319257] [2021-11-06 14:32:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:37,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:32:37,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:37,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598319257] [2021-11-06 14:32:37,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598319257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:37,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:37,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:32:37,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672415494] [2021-11-06 14:32:37,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:32:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:32:37,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:37,584 INFO L87 Difference]: Start difference. First operand has 296 states, 294 states have (on average 1.5374149659863945) internal successors, (452), 295 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:37,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:37,800 INFO L93 Difference]: Finished difference Result 849 states and 1306 transitions. [2021-11-06 14:32:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:32:37,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-06 14:32:37,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:37,815 INFO L225 Difference]: With dead ends: 849 [2021-11-06 14:32:37,815 INFO L226 Difference]: Without dead ends: 548 [2021-11-06 14:32:37,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-06 14:32:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2021-11-06 14:32:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.4625228519195612) internal successors, (800), 547 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 800 transitions. [2021-11-06 14:32:37,877 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 800 transitions. Word has length 18 [2021-11-06 14:32:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:37,878 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 800 transitions. [2021-11-06 14:32:37,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:37,878 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 800 transitions. [2021-11-06 14:32:37,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-06 14:32:37,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:37,880 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] [2021-11-06 14:32:37,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:32:37,880 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1026177985, now seen corresponding path program 1 times [2021-11-06 14:32:37,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:37,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736783608] [2021-11-06 14:32:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:37,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:32:37,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:37,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736783608] [2021-11-06 14:32:37,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736783608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:37,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:37,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:32:37,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135863715] [2021-11-06 14:32:37,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:32:37,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:37,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:32:38,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:38,001 INFO L87 Difference]: Start difference. First operand 548 states and 800 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:38,121 INFO L93 Difference]: Finished difference Result 1085 states and 1586 transitions. [2021-11-06 14:32:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:32:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-11-06 14:32:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:38,127 INFO L225 Difference]: With dead ends: 1085 [2021-11-06 14:32:38,127 INFO L226 Difference]: Without dead ends: 547 [2021-11-06 14:32:38,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:38,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-06 14:32:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 547. [2021-11-06 14:32:38,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.4578754578754578) internal successors, (796), 546 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 796 transitions. [2021-11-06 14:32:38,182 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 796 transitions. Word has length 23 [2021-11-06 14:32:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:38,183 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 796 transitions. [2021-11-06 14:32:38,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 796 transitions. [2021-11-06 14:32:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-06 14:32:38,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:38,188 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:38,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:32:38,189 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:38,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1235790266, now seen corresponding path program 1 times [2021-11-06 14:32:38,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:38,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925669905] [2021-11-06 14:32:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:38,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:32:38,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:38,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925669905] [2021-11-06 14:32:38,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925669905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:38,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:38,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:32:38,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078294871] [2021-11-06 14:32:38,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:32:38,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:32:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:38,362 INFO L87 Difference]: Start difference. First operand 547 states and 796 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:38,478 INFO L93 Difference]: Finished difference Result 1619 states and 2363 transitions. [2021-11-06 14:32:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:32:38,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 34 [2021-11-06 14:32:38,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:38,484 INFO L225 Difference]: With dead ends: 1619 [2021-11-06 14:32:38,484 INFO L226 Difference]: Without dead ends: 1078 [2021-11-06 14:32:38,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:32:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-11-06 14:32:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1062. [2021-11-06 14:32:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.4608859566446748) internal successors, (1550), 1061 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1550 transitions. [2021-11-06 14:32:38,558 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1550 transitions. Word has length 34 [2021-11-06 14:32:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:38,559 INFO L470 AbstractCegarLoop]: Abstraction has 1062 states and 1550 transitions. [2021-11-06 14:32:38,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1550 transitions. [2021-11-06 14:32:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 14:32:38,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:38,569 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:38,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:32:38,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:38,570 INFO L85 PathProgramCache]: Analyzing trace with hash -523857681, now seen corresponding path program 1 times [2021-11-06 14:32:38,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:38,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517386248] [2021-11-06 14:32:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:38,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:32:38,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:38,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517386248] [2021-11-06 14:32:38,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517386248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:38,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:38,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:32:38,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276381831] [2021-11-06 14:32:38,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:32:38,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:38,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:32:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:38,682 INFO L87 Difference]: Start difference. First operand 1062 states and 1550 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:38,733 INFO L93 Difference]: Finished difference Result 1659 states and 2416 transitions. [2021-11-06 14:32:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:32:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-06 14:32:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:38,737 INFO L225 Difference]: With dead ends: 1659 [2021-11-06 14:32:38,737 INFO L226 Difference]: Without dead ends: 607 [2021-11-06 14:32:38,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:38,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-06 14:32:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 593. [2021-11-06 14:32:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.4527027027027026) internal successors, (860), 592 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 860 transitions. [2021-11-06 14:32:38,759 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 860 transitions. Word has length 65 [2021-11-06 14:32:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:38,759 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 860 transitions. [2021-11-06 14:32:38,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 860 transitions. [2021-11-06 14:32:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 14:32:38,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:38,762 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:38,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:32:38,763 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:38,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:38,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1036238733, now seen corresponding path program 2 times [2021-11-06 14:32:38,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:38,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907741003] [2021-11-06 14:32:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:38,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:32:38,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:38,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907741003] [2021-11-06 14:32:38,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907741003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:38,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:38,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:32:38,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951235874] [2021-11-06 14:32:38,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:32:38,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:38,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:32:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:38,903 INFO L87 Difference]: Start difference. First operand 593 states and 860 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:39,026 INFO L93 Difference]: Finished difference Result 2560 states and 3739 transitions. [2021-11-06 14:32:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:32:39,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-06 14:32:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:39,037 INFO L225 Difference]: With dead ends: 2560 [2021-11-06 14:32:39,037 INFO L226 Difference]: Without dead ends: 1990 [2021-11-06 14:32:39,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2021-11-06 14:32:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 601. [2021-11-06 14:32:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.4466666666666668) internal successors, (868), 600 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 868 transitions. [2021-11-06 14:32:39,073 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 868 transitions. Word has length 65 [2021-11-06 14:32:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:39,074 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 868 transitions. [2021-11-06 14:32:39,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 868 transitions. [2021-11-06 14:32:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 14:32:39,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:39,077 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:39,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:32:39,078 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1608905898, now seen corresponding path program 1 times [2021-11-06 14:32:39,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:39,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478155444] [2021-11-06 14:32:39,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:39,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:32:39,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:39,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478155444] [2021-11-06 14:32:39,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478155444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:39,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:39,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-06 14:32:39,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330792855] [2021-11-06 14:32:39,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:32:39,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:39,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:32:39,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:32:39,246 INFO L87 Difference]: Start difference. First operand 601 states and 868 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:39,581 INFO L93 Difference]: Finished difference Result 2406 states and 3502 transitions. [2021-11-06 14:32:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 14:32:39,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 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 68 [2021-11-06 14:32:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:39,591 INFO L225 Difference]: With dead ends: 2406 [2021-11-06 14:32:39,592 INFO L226 Difference]: Without dead ends: 1828 [2021-11-06 14:32:39,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-06 14:32:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-11-06 14:32:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 609. [2021-11-06 14:32:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.4342105263157894) internal successors, (872), 608 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 872 transitions. [2021-11-06 14:32:39,635 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 872 transitions. Word has length 68 [2021-11-06 14:32:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:39,636 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 872 transitions. [2021-11-06 14:32:39,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 872 transitions. [2021-11-06 14:32:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-06 14:32:39,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:39,638 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:39,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:32:39,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:39,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:39,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1582440401, now seen corresponding path program 1 times [2021-11-06 14:32:39,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:39,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145940987] [2021-11-06 14:32:39,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:39,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 14:32:39,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:39,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145940987] [2021-11-06 14:32:39,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145940987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:39,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:39,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:32:39,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241842664] [2021-11-06 14:32:39,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:32:39,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:39,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:32:39,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:39,775 INFO L87 Difference]: Start difference. First operand 609 states and 872 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:39,806 INFO L93 Difference]: Finished difference Result 1210 states and 1735 transitions. [2021-11-06 14:32:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:32:39,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-06 14:32:39,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:39,810 INFO L225 Difference]: With dead ends: 1210 [2021-11-06 14:32:39,810 INFO L226 Difference]: Without dead ends: 610 [2021-11-06 14:32:39,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-06 14:32:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-11-06 14:32:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 1.4334975369458127) internal successors, (873), 609 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 873 transitions. [2021-11-06 14:32:39,842 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 873 transitions. Word has length 70 [2021-11-06 14:32:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:39,842 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 873 transitions. [2021-11-06 14:32:39,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 873 transitions. [2021-11-06 14:32:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-06 14:32:39,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:39,844 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:39,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:32:39,845 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1273317856, now seen corresponding path program 1 times [2021-11-06 14:32:39,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:39,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675039237] [2021-11-06 14:32:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:39,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:32:40,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:40,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675039237] [2021-11-06 14:32:40,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675039237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:40,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:40,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-06 14:32:40,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244866269] [2021-11-06 14:32:40,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:32:40,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:40,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:32:40,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:32:40,321 INFO L87 Difference]: Start difference. First operand 610 states and 873 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:41,614 INFO L93 Difference]: Finished difference Result 2812 states and 4066 transitions. [2021-11-06 14:32:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-06 14:32:41,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 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 71 [2021-11-06 14:32:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:41,625 INFO L225 Difference]: With dead ends: 2812 [2021-11-06 14:32:41,625 INFO L226 Difference]: Without dead ends: 2226 [2021-11-06 14:32:41,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-11-06 14:32:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-11-06 14:32:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 638. [2021-11-06 14:32:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 1.4207221350078494) internal successors, (905), 637 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:41,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 905 transitions. [2021-11-06 14:32:41,698 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 905 transitions. Word has length 71 [2021-11-06 14:32:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:41,698 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 905 transitions. [2021-11-06 14:32:41,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 905 transitions. [2021-11-06 14:32:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-06 14:32:41,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:41,700 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:41,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:32:41,701 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:41,701 INFO L85 PathProgramCache]: Analyzing trace with hash -207364913, now seen corresponding path program 1 times [2021-11-06 14:32:41,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:41,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570434285] [2021-11-06 14:32:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:41,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:32:41,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:41,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570434285] [2021-11-06 14:32:41,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570434285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:41,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:41,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:32:41,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872137080] [2021-11-06 14:32:41,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:32:41,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:32:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:41,803 INFO L87 Difference]: Start difference. First operand 638 states and 905 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:41,925 INFO L93 Difference]: Finished difference Result 1536 states and 2187 transitions. [2021-11-06 14:32:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:32:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 77 [2021-11-06 14:32:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:41,932 INFO L225 Difference]: With dead ends: 1536 [2021-11-06 14:32:41,932 INFO L226 Difference]: Without dead ends: 1222 [2021-11-06 14:32:41,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-11-06 14:32:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 642. [2021-11-06 14:32:41,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.4180967238689548) internal successors, (909), 641 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:41,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 909 transitions. [2021-11-06 14:32:41,996 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 909 transitions. Word has length 77 [2021-11-06 14:32:41,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:41,997 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 909 transitions. [2021-11-06 14:32:41,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 909 transitions. [2021-11-06 14:32:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 14:32:42,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:42,004 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:42,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:32:42,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1597670354, now seen corresponding path program 1 times [2021-11-06 14:32:42,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:42,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648521475] [2021-11-06 14:32:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:42,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:32:42,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:42,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648521475] [2021-11-06 14:32:42,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648521475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:42,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:42,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:32:42,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741922261] [2021-11-06 14:32:42,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:32:42,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:32:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:42,135 INFO L87 Difference]: Start difference. First operand 642 states and 909 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:42,355 INFO L93 Difference]: Finished difference Result 1538 states and 2184 transitions. [2021-11-06 14:32:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:32:42,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-06 14:32:42,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:42,360 INFO L225 Difference]: With dead ends: 1538 [2021-11-06 14:32:42,360 INFO L226 Difference]: Without dead ends: 920 [2021-11-06 14:32:42,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-06 14:32:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 636. [2021-11-06 14:32:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 1.4125984251968504) internal successors, (897), 635 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 897 transitions. [2021-11-06 14:32:42,418 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 897 transitions. Word has length 79 [2021-11-06 14:32:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:42,419 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 897 transitions. [2021-11-06 14:32:42,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 897 transitions. [2021-11-06 14:32:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 14:32:42,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:42,421 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:42,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 14:32:42,422 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1802324330, now seen corresponding path program 1 times [2021-11-06 14:32:42,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:42,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507511644] [2021-11-06 14:32:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:42,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:32:42,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:42,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507511644] [2021-11-06 14:32:42,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507511644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:42,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:42,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:32:42,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750423388] [2021-11-06 14:32:42,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:32:42,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:42,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:32:42,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:42,567 INFO L87 Difference]: Start difference. First operand 636 states and 897 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:42,663 INFO L93 Difference]: Finished difference Result 1519 states and 2148 transitions. [2021-11-06 14:32:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:32:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 84 [2021-11-06 14:32:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:42,668 INFO L225 Difference]: With dead ends: 1519 [2021-11-06 14:32:42,668 INFO L226 Difference]: Without dead ends: 907 [2021-11-06 14:32:42,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:32:42,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-11-06 14:32:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 630. [2021-11-06 14:32:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 1.4069952305246423) internal successors, (885), 629 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:42,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 885 transitions. [2021-11-06 14:32:42,730 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 885 transitions. Word has length 84 [2021-11-06 14:32:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:42,730 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 885 transitions. [2021-11-06 14:32:42,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 885 transitions. [2021-11-06 14:32:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 14:32:42,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:42,732 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:42,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 14:32:42,733 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash 457259670, now seen corresponding path program 1 times [2021-11-06 14:32:42,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:42,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077683003] [2021-11-06 14:32:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:42,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:32:42,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:42,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077683003] [2021-11-06 14:32:42,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077683003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:32:42,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:32:42,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:32:42,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291573773] [2021-11-06 14:32:42,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:32:42,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:32:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:32:42,935 INFO L87 Difference]: Start difference. First operand 630 states and 885 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:43,085 INFO L93 Difference]: Finished difference Result 1515 states and 2138 transitions. [2021-11-06 14:32:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:32:43,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 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 84 [2021-11-06 14:32:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:43,090 INFO L225 Difference]: With dead ends: 1515 [2021-11-06 14:32:43,090 INFO L226 Difference]: Without dead ends: 909 [2021-11-06 14:32:43,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:32:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-11-06 14:32:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 632. [2021-11-06 14:32:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 1.4057052297939778) internal successors, (887), 631 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:43,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 887 transitions. [2021-11-06 14:32:43,161 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 887 transitions. Word has length 84 [2021-11-06 14:32:43,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:43,161 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 887 transitions. [2021-11-06 14:32:43,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:43,162 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 887 transitions. [2021-11-06 14:32:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-06 14:32:43,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:43,163 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:43,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 14:32:43,164 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:43,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1486510631, now seen corresponding path program 1 times [2021-11-06 14:32:43,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:43,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592042751] [2021-11-06 14:32:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:43,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:32:43,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:43,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592042751] [2021-11-06 14:32:43,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592042751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:43,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076102121] [2021-11-06 14:32:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:43,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:43,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:43,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 14:32:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 14:32:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:44,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:32:44,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076102121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:44,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:32:44,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-06 14:32:44,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419431585] [2021-11-06 14:32:44,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-06 14:32:44,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:44,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-06 14:32:44,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-06 14:32:44,034 INFO L87 Difference]: Start difference. First operand 632 states and 887 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:44,581 INFO L93 Difference]: Finished difference Result 2972 states and 4181 transitions. [2021-11-06 14:32:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 14:32:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-06 14:32:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:44,591 INFO L225 Difference]: With dead ends: 2972 [2021-11-06 14:32:44,591 INFO L226 Difference]: Without dead ends: 2364 [2021-11-06 14:32:44,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:32:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-11-06 14:32:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 644. [2021-11-06 14:32:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 1.401244167962675) internal successors, (901), 643 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 901 transitions. [2021-11-06 14:32:44,665 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 901 transitions. Word has length 85 [2021-11-06 14:32:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:44,665 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 901 transitions. [2021-11-06 14:32:44,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:44,666 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 901 transitions. [2021-11-06 14:32:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-06 14:32:44,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:44,667 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:44,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:44,887 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,SelfDestructingSolverStorable12 [2021-11-06 14:32:44,887 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1365505865, now seen corresponding path program 1 times [2021-11-06 14:32:44,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:44,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66428504] [2021-11-06 14:32:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:44,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:32:45,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:45,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66428504] [2021-11-06 14:32:45,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66428504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:45,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114958605] [2021-11-06 14:32:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:45,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:45,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:45,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 14:32:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:32:48,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:32:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:32:49,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114958605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:49,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:32:49,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-06 14:32:49,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852197670] [2021-11-06 14:32:49,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 14:32:49,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:32:49,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 14:32:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-06 14:32:49,248 INFO L87 Difference]: Start difference. First operand 644 states and 901 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:32:49,516 INFO L93 Difference]: Finished difference Result 1543 states and 2170 transitions. [2021-11-06 14:32:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 14:32:49,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 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 87 [2021-11-06 14:32:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:32:49,521 INFO L225 Difference]: With dead ends: 1543 [2021-11-06 14:32:49,521 INFO L226 Difference]: Without dead ends: 923 [2021-11-06 14:32:49,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:32:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-11-06 14:32:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 646. [2021-11-06 14:32:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 1.4) internal successors, (903), 645 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 903 transitions. [2021-11-06 14:32:49,590 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 903 transitions. Word has length 87 [2021-11-06 14:32:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:32:49,590 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 903 transitions. [2021-11-06 14:32:49,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:32:49,591 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 903 transitions. [2021-11-06 14:32:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-06 14:32:49,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:32:49,592 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:32:49,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 14:32:49,819 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,SelfDestructingSolverStorable13 [2021-11-06 14:32:49,820 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:32:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:32:49,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2009358872, now seen corresponding path program 2 times [2021-11-06 14:32:49,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:32:49,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337570627] [2021-11-06 14:32:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:32:49,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:32:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:32:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:32:50,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:32:50,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337570627] [2021-11-06 14:32:50,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337570627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:32:50,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660181815] [2021-11-06 14:32:50,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:32:50,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:32:50,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:32:50,172 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:32:50,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 14:33:02,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:33:02,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 14:33:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:33:03,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660181815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:03,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:33:03,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-06 14:33:03,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153602708] [2021-11-06 14:33:03,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 14:33:03,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 14:33:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:33:03,287 INFO L87 Difference]: Start difference. First operand 646 states and 903 transitions. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:03,704 INFO L93 Difference]: Finished difference Result 1547 states and 2174 transitions. [2021-11-06 14:33:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 14:33:03,705 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-06 14:33:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:03,709 INFO L225 Difference]: With dead ends: 1547 [2021-11-06 14:33:03,709 INFO L226 Difference]: Without dead ends: 925 [2021-11-06 14:33:03,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:33:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-11-06 14:33:03,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 648. [2021-11-06 14:33:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.3987635239567233) internal successors, (905), 647 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 905 transitions. [2021-11-06 14:33:03,791 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 905 transitions. Word has length 88 [2021-11-06 14:33:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:03,791 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 905 transitions. [2021-11-06 14:33:03,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 905 transitions. [2021-11-06 14:33:03,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 14:33:03,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:03,793 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:03,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:04,019 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 14:33:04,019 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:04,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash 493965609, now seen corresponding path program 3 times [2021-11-06 14:33:04,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:04,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039040920] [2021-11-06 14:33:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:04,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:33:04,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:04,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039040920] [2021-11-06 14:33:04,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039040920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:04,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248038002] [2021-11-06 14:33:04,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:33:04,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:04,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:04,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:04,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 14:33:05,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 14:33:05,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 14:33:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:05,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-06 14:33:05,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-06 14:33:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-06 14:33:06,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248038002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:33:06,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:33:06,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-06 14:33:06,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561773644] [2021-11-06 14:33:06,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:33:06,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:33:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-06 14:33:06,033 INFO L87 Difference]: Start difference. First operand 648 states and 905 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:07,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:07,324 INFO L93 Difference]: Finished difference Result 1436 states and 2033 transitions. [2021-11-06 14:33:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:33:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-06 14:33:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:07,328 INFO L225 Difference]: With dead ends: 1436 [2021-11-06 14:33:07,329 INFO L226 Difference]: Without dead ends: 812 [2021-11-06 14:33:07,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-06 14:33:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-06 14:33:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 656. [2021-11-06 14:33:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 655 states have (on average 1.4) internal successors, (917), 655 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 917 transitions. [2021-11-06 14:33:07,389 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 917 transitions. Word has length 89 [2021-11-06 14:33:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:07,389 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 917 transitions. [2021-11-06 14:33:07,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 917 transitions. [2021-11-06 14:33:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 14:33:07,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:07,391 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:07,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:07,620 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 14:33:07,620 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:07,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1534620501, now seen corresponding path program 1 times [2021-11-06 14:33:07,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:07,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945661605] [2021-11-06 14:33:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:07,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:33:08,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:08,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945661605] [2021-11-06 14:33:08,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945661605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:08,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81099541] [2021-11-06 14:33:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:08,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:08,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:08,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 14:33:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 14:33:11,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:33:11,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81099541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:11,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:33:11,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-06 14:33:11,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458008953] [2021-11-06 14:33:11,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 14:33:11,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 14:33:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-06 14:33:11,713 INFO L87 Difference]: Start difference. First operand 656 states and 917 transitions. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:12,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:12,328 INFO L93 Difference]: Finished difference Result 1567 states and 2202 transitions. [2021-11-06 14:33:12,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 14:33:12,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-06 14:33:12,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:12,333 INFO L225 Difference]: With dead ends: 1567 [2021-11-06 14:33:12,333 INFO L226 Difference]: Without dead ends: 935 [2021-11-06 14:33:12,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-06 14:33:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-06 14:33:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 658. [2021-11-06 14:33:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.3987823439878235) internal successors, (919), 657 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 919 transitions. [2021-11-06 14:33:12,408 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 919 transitions. Word has length 89 [2021-11-06 14:33:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:12,408 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 919 transitions. [2021-11-06 14:33:12,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 919 transitions. [2021-11-06 14:33:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 14:33:12,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:12,410 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:12,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:12,619 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 14:33:12,620 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1995212554, now seen corresponding path program 2 times [2021-11-06 14:33:12,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:12,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181378890] [2021-11-06 14:33:12,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:12,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:33:12,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:12,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181378890] [2021-11-06 14:33:12,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181378890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:12,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948502859] [2021-11-06 14:33:12,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 14:33:12,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:12,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:12,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:12,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 14:33:17,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 14:33:17,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 14:33:17,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-06 14:33:17,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:33:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:33:17,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948502859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:17,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 14:33:17,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-06 14:33:17,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228339719] [2021-11-06 14:33:17,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 14:33:17,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:33:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 14:33:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-06 14:33:17,989 INFO L87 Difference]: Start difference. First operand 658 states and 919 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:33:18,565 INFO L93 Difference]: Finished difference Result 1571 states and 2206 transitions. [2021-11-06 14:33:18,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 14:33:18,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 14:33:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:33:18,569 INFO L225 Difference]: With dead ends: 1571 [2021-11-06 14:33:18,569 INFO L226 Difference]: Without dead ends: 937 [2021-11-06 14:33:18,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-06 14:33:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-11-06 14:33:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 660. [2021-11-06 14:33:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 1.3975720789074355) internal successors, (921), 659 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 921 transitions. [2021-11-06 14:33:18,631 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 921 transitions. Word has length 90 [2021-11-06 14:33:18,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:33:18,631 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 921 transitions. [2021-11-06 14:33:18,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:33:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 921 transitions. [2021-11-06 14:33:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-06 14:33:18,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:33:18,633 INFO L513 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:33:18,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 14:33:18,850 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 14:33:18,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:33:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:33:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 906302987, now seen corresponding path program 3 times [2021-11-06 14:33:18,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:33:18,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959519644] [2021-11-06 14:33:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:33:18,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:33:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:33:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:33:19,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:33:19,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959519644] [2021-11-06 14:33:19,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959519644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:33:19,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501719135] [2021-11-06 14:33:19,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 14:33:19,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:33:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:33:19,186 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 14:33:19,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15