./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.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 26d71a6766df17a2d23a86b348a9251fef4bcae90cf6020641e74c486ac2b1eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:29:45,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:29:45,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:29:45,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:29:45,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:29:45,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:29:45,202 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:29:45,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:29:45,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:29:45,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:29:45,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:29:45,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:29:45,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:29:45,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:29:45,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:29:45,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:29:45,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:29:45,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:29:45,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:29:45,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:29:45,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:29:45,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:29:45,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:29:45,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:29:45,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:29:45,240 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:29:45,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:29:45,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:29:45,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:29:45,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:29:45,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:29:45,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:29:45,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:29:45,243 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:29:45,244 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:29:45,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:29:45,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:29:45,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:29:45,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:29:45,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:29:45,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:29:45,251 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:29:45,279 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:29:45,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:29:45,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:29:45,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:29:45,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:29:45,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:29:45,283 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:29:45,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:29:45,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:29:45,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:29:45,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:29:45,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:29:45,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:29:45,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:29:45,285 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:29:45,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:29:45,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:29:45,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:29:45,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:29:45,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:29:45,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:29:45,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:29:45,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:29:45,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:29:45,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:29:45,286 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:29:45,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:29:45,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:29:45,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:29:45,287 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26d71a6766df17a2d23a86b348a9251fef4bcae90cf6020641e74c486ac2b1eb [2021-11-06 14:29:45,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:29:45,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:29:45,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:29:45,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:29:45,518 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:29:45,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i [2021-11-06 14:29:45,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65fa72de/a71b1a729d8d46c68f05e9d442baa88c/FLAGa02311305 [2021-11-06 14:29:46,191 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:29:46,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i [2021-11-06 14:29:46,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65fa72de/a71b1a729d8d46c68f05e9d442baa88c/FLAGa02311305 [2021-11-06 14:29:46,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d65fa72de/a71b1a729d8d46c68f05e9d442baa88c [2021-11-06 14:29:46,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:29:46,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:29:46,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:29:46,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:29:46,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:29:46,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:29:46" (1/1) ... [2021-11-06 14:29:46,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3b5441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:46, skipping insertion in model container [2021-11-06 14:29:46,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:29:46" (1/1) ... [2021-11-06 14:29:46,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:29:46,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:29:47,559 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i[172824,172837] [2021-11-06 14:29:48,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:29:48,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:29:48,569 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i[172824,172837] [2021-11-06 14:29:48,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:29:48,834 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:29:48,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48 WrapperNode [2021-11-06 14:29:48,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:29:48,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:29:48,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:29:48,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:29:48,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:48,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:29:49,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:29:49,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:29:49,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:29:49,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:29:49,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:29:49,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:29:49,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:29:49,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (1/1) ... [2021-11-06 14:29:49,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:29:49,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:29:49,793 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 14:29:49,824 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 14:29:49,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:29:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:29:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-06 14:29:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:29:49,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:29:49,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:29:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 14:29:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:29:49,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:29:49,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:30:04,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:30:04,965 INFO L299 CfgBuilder]: Removed 3362 assume(true) statements. [2021-11-06 14:30:04,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:30:04 BoogieIcfgContainer [2021-11-06 14:30:04,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:30:04,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:30:04,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:30:04,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:30:04,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:29:46" (1/3) ... [2021-11-06 14:30:04,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61303db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:30:04, skipping insertion in model container [2021-11-06 14:30:04,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:29:48" (2/3) ... [2021-11-06 14:30:04,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61303db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:30:04, skipping insertion in model container [2021-11-06 14:30:04,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:30:04" (3/3) ... [2021-11-06 14:30:04,981 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--smsc--smsc9420.ko-entry_point.cil.out.i [2021-11-06 14:30:04,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:30:04,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:30:05,046 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:30:05,050 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 14:30:05,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:30:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 2776 states, 2774 states have (on average 1.3193943763518385) internal successors, (3660), 2775 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states 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 14:30:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-06 14:30:05,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:05,109 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:30:05,109 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:05,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1461368549, now seen corresponding path program 1 times [2021-11-06 14:30:05,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:05,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678730705] [2021-11-06 14:30:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:05,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:05,625 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 14:30:05,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:05,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678730705] [2021-11-06 14:30:05,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678730705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:05,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:05,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:30:05,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726967471] [2021-11-06 14:30:05,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:05,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:05,645 INFO L87 Difference]: Start difference. First operand has 2776 states, 2774 states have (on average 1.3193943763518385) internal successors, (3660), 2775 states have internal predecessors, (3660), 0 states have call successors, (0), 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 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 14:30:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:08,075 INFO L93 Difference]: Finished difference Result 8175 states and 10779 transitions. [2021-11-06 14:30:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:08,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-11-06 14:30:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:08,102 INFO L225 Difference]: With dead ends: 8175 [2021-11-06 14:30:08,102 INFO L226 Difference]: Without dead ends: 5234 [2021-11-06 14:30:08,111 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 14:30:08,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5234 states. [2021-11-06 14:30:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5234 to 5234. [2021-11-06 14:30:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.2799541372061916) internal successors, (6698), 5233 states have internal predecessors, (6698), 0 states have call successors, (0), 0 states 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 14:30:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6698 transitions. [2021-11-06 14:30:08,283 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6698 transitions. Word has length 37 [2021-11-06 14:30:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:08,283 INFO L470 AbstractCegarLoop]: Abstraction has 5234 states and 6698 transitions. [2021-11-06 14:30:08,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states 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 14:30:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6698 transitions. [2021-11-06 14:30:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-06 14:30:08,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:08,287 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:30:08,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:30:08,288 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:08,289 INFO L85 PathProgramCache]: Analyzing trace with hash 891006068, now seen corresponding path program 1 times [2021-11-06 14:30:08,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:08,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425515727] [2021-11-06 14:30:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:08,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:08,504 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 14:30:08,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:08,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425515727] [2021-11-06 14:30:08,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425515727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:08,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:08,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:30:08,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726243985] [2021-11-06 14:30:08,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:30:08,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:08,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:30:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:30:08,507 INFO L87 Difference]: Start difference. First operand 5234 states and 6698 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:08,842 INFO L93 Difference]: Finished difference Result 15510 states and 19881 transitions. [2021-11-06 14:30:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:30:08,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-06 14:30:08,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:08,877 INFO L225 Difference]: With dead ends: 15510 [2021-11-06 14:30:08,878 INFO L226 Difference]: Without dead ends: 10367 [2021-11-06 14:30:08,890 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 14:30:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10367 states. [2021-11-06 14:30:09,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10367 to 10367. [2021-11-06 14:30:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10367 states, 10366 states have (on average 1.280918387034536) internal successors, (13278), 10366 states have internal predecessors, (13278), 0 states have call successors, (0), 0 states 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 14:30:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10367 states to 10367 states and 13278 transitions. [2021-11-06 14:30:09,109 INFO L78 Accepts]: Start accepts. Automaton has 10367 states and 13278 transitions. Word has length 43 [2021-11-06 14:30:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:09,109 INFO L470 AbstractCegarLoop]: Abstraction has 10367 states and 13278 transitions. [2021-11-06 14:30:09,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:09,110 INFO L276 IsEmpty]: Start isEmpty. Operand 10367 states and 13278 transitions. [2021-11-06 14:30:09,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-06 14:30:09,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:09,127 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:30:09,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:30:09,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash 32581807, now seen corresponding path program 1 times [2021-11-06 14:30:09,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:09,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302445328] [2021-11-06 14:30:09,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:09,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:30:09,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:09,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302445328] [2021-11-06 14:30:09,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302445328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:09,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:09,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:30:09,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960247758] [2021-11-06 14:30:09,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:09,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:09,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:09,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:09,338 INFO L87 Difference]: Start difference. First operand 10367 states and 13278 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 14:30:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:09,921 INFO L93 Difference]: Finished difference Result 26159 states and 33612 transitions. [2021-11-06 14:30:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:09,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-11-06 14:30:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:09,979 INFO L225 Difference]: With dead ends: 26159 [2021-11-06 14:30:09,979 INFO L226 Difference]: Without dead ends: 15887 [2021-11-06 14:30:09,996 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 14:30:10,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15887 states. [2021-11-06 14:30:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15887 to 15209. [2021-11-06 14:30:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15209 states, 15208 states have (on average 1.284784324039979) internal successors, (19539), 15208 states have internal predecessors, (19539), 0 states have call successors, (0), 0 states 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 14:30:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15209 states to 15209 states and 19539 transitions. [2021-11-06 14:30:10,346 INFO L78 Accepts]: Start accepts. Automaton has 15209 states and 19539 transitions. Word has length 201 [2021-11-06 14:30:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:10,348 INFO L470 AbstractCegarLoop]: Abstraction has 15209 states and 19539 transitions. [2021-11-06 14:30:10,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states 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 14:30:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 15209 states and 19539 transitions. [2021-11-06 14:30:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-06 14:30:10,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:10,361 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:30:10,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:30:10,362 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1781732763, now seen corresponding path program 1 times [2021-11-06 14:30:10,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:10,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812297507] [2021-11-06 14:30:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:10,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:30:10,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:10,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812297507] [2021-11-06 14:30:10,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812297507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:10,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:10,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:30:10,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733284477] [2021-11-06 14:30:10,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:10,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:10,570 INFO L87 Difference]: Start difference. First operand 15209 states and 19539 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 14:30:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:11,041 INFO L93 Difference]: Finished difference Result 38949 states and 50191 transitions. [2021-11-06 14:30:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:11,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 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 216 [2021-11-06 14:30:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:11,096 INFO L225 Difference]: With dead ends: 38949 [2021-11-06 14:30:11,096 INFO L226 Difference]: Without dead ends: 23835 [2021-11-06 14:30:11,119 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 14:30:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23835 states. [2021-11-06 14:30:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23835 to 23829. [2021-11-06 14:30:11,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23829 states, 23828 states have (on average 1.2902887359409099) internal successors, (30745), 23828 states have internal predecessors, (30745), 0 states have call successors, (0), 0 states 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 14:30:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23829 states to 23829 states and 30745 transitions. [2021-11-06 14:30:11,580 INFO L78 Accepts]: Start accepts. Automaton has 23829 states and 30745 transitions. Word has length 216 [2021-11-06 14:30:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:11,581 INFO L470 AbstractCegarLoop]: Abstraction has 23829 states and 30745 transitions. [2021-11-06 14:30:11,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states 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 14:30:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 23829 states and 30745 transitions. [2021-11-06 14:30:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-06 14:30:11,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:11,600 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:11,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:30:11,600 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:11,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2130056462, now seen corresponding path program 1 times [2021-11-06 14:30:11,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:11,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356583792] [2021-11-06 14:30:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:11,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:30:11,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:11,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356583792] [2021-11-06 14:30:11,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356583792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:11,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:11,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:30:11,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131182884] [2021-11-06 14:30:11,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:11,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:11,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:11,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:11,792 INFO L87 Difference]: Start difference. First operand 23829 states and 30745 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 14:30:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:14,505 INFO L93 Difference]: Finished difference Result 56277 states and 72763 transitions. [2021-11-06 14:30:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:14,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 233 [2021-11-06 14:30:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:14,588 INFO L225 Difference]: With dead ends: 56277 [2021-11-06 14:30:14,589 INFO L226 Difference]: Without dead ends: 32543 [2021-11-06 14:30:14,626 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 14:30:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32543 states. [2021-11-06 14:30:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32543 to 32537. [2021-11-06 14:30:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32537 states, 32536 states have (on average 1.2930599950823702) internal successors, (42071), 32536 states have internal predecessors, (42071), 0 states have call successors, (0), 0 states 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 14:30:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32537 states to 32537 states and 42071 transitions. [2021-11-06 14:30:15,408 INFO L78 Accepts]: Start accepts. Automaton has 32537 states and 42071 transitions. Word has length 233 [2021-11-06 14:30:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:15,410 INFO L470 AbstractCegarLoop]: Abstraction has 32537 states and 42071 transitions. [2021-11-06 14:30:15,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 14:30:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 32537 states and 42071 transitions. [2021-11-06 14:30:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-06 14:30:15,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:15,441 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:30:15,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:30:15,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash -727705278, now seen corresponding path program 1 times [2021-11-06 14:30:15,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:15,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400814513] [2021-11-06 14:30:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:15,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:30:15,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:15,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400814513] [2021-11-06 14:30:15,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400814513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:15,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:15,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:30:15,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428580163] [2021-11-06 14:30:15,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:30:15,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:30:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:30:15,665 INFO L87 Difference]: Start difference. First operand 32537 states and 42071 transitions. Second operand has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 14:30:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:18,601 INFO L93 Difference]: Finished difference Result 74721 states and 96673 transitions. [2021-11-06 14:30:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:30:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 0 states have call successors, (0), 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 248 [2021-11-06 14:30:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:18,680 INFO L225 Difference]: With dead ends: 74721 [2021-11-06 14:30:18,680 INFO L226 Difference]: Without dead ends: 42279 [2021-11-06 14:30:18,730 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 14:30:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42279 states. [2021-11-06 14:30:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42279 to 32545. [2021-11-06 14:30:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32545 states, 32544 states have (on average 1.2928650442477876) internal successors, (42075), 32544 states have internal predecessors, (42075), 0 states have call successors, (0), 0 states 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 14:30:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32545 states to 32545 states and 42075 transitions. [2021-11-06 14:30:19,570 INFO L78 Accepts]: Start accepts. Automaton has 32545 states and 42075 transitions. Word has length 248 [2021-11-06 14:30:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:19,572 INFO L470 AbstractCegarLoop]: Abstraction has 32545 states and 42075 transitions. [2021-11-06 14:30:19,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.5) internal successors, (242), 4 states have internal predecessors, (242), 0 states have call successors, (0), 0 states 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 14:30:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32545 states and 42075 transitions. [2021-11-06 14:30:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-06 14:30:19,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:19,612 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:19,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:30:19,613 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:19,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1244825967, now seen corresponding path program 1 times [2021-11-06 14:30:19,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:19,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102881460] [2021-11-06 14:30:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:19,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 14:30:19,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:19,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102881460] [2021-11-06 14:30:19,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102881460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:19,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:19,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:30:19,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312236443] [2021-11-06 14:30:19,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:19,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:19,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:19,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:19,873 INFO L87 Difference]: Start difference. First operand 32545 states and 42075 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:20,617 INFO L93 Difference]: Finished difference Result 65043 states and 84100 transitions. [2021-11-06 14:30:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:20,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 318 [2021-11-06 14:30:20,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:20,678 INFO L225 Difference]: With dead ends: 65043 [2021-11-06 14:30:20,679 INFO L226 Difference]: Without dead ends: 32593 [2021-11-06 14:30:20,721 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 14:30:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32593 states. [2021-11-06 14:30:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32593 to 32549. [2021-11-06 14:30:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32549 states, 32548 states have (on average 1.2928290524763426) internal successors, (42079), 32548 states have internal predecessors, (42079), 0 states have call successors, (0), 0 states 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 14:30:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32549 states to 32549 states and 42079 transitions. [2021-11-06 14:30:21,515 INFO L78 Accepts]: Start accepts. Automaton has 32549 states and 42079 transitions. Word has length 318 [2021-11-06 14:30:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:21,515 INFO L470 AbstractCegarLoop]: Abstraction has 32549 states and 42079 transitions. [2021-11-06 14:30:21,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:30:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32549 states and 42079 transitions. [2021-11-06 14:30:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2021-11-06 14:30:21,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:21,543 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:21,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:30:21,544 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1114219471, now seen corresponding path program 1 times [2021-11-06 14:30:21,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:21,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587637810] [2021-11-06 14:30:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:21,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:30:21,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:21,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587637810] [2021-11-06 14:30:21,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587637810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:21,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807023833] [2021-11-06 14:30:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:21,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:21,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:21,840 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 14:30:21,843 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 14:30:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:23,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 5012 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:30:23,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:30:23,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807023833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:23,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:30:23,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 14:30:23,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360569809] [2021-11-06 14:30:23,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:23,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:23,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:23,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:30:23,863 INFO L87 Difference]: Start difference. First operand 32549 states and 42079 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 14:30:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:24,863 INFO L93 Difference]: Finished difference Result 75199 states and 97694 transitions. [2021-11-06 14:30:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 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 318 [2021-11-06 14:30:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:24,939 INFO L225 Difference]: With dead ends: 75199 [2021-11-06 14:30:24,939 INFO L226 Difference]: Without dead ends: 42745 [2021-11-06 14:30:24,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:30:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42745 states. [2021-11-06 14:30:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42745 to 42063. [2021-11-06 14:30:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42063 states, 42062 states have (on average 1.298749465075365) internal successors, (54628), 42062 states have internal predecessors, (54628), 0 states have call successors, (0), 0 states 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 14:30:25,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42063 states to 42063 states and 54628 transitions. [2021-11-06 14:30:25,892 INFO L78 Accepts]: Start accepts. Automaton has 42063 states and 54628 transitions. Word has length 318 [2021-11-06 14:30:25,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:25,893 INFO L470 AbstractCegarLoop]: Abstraction has 42063 states and 54628 transitions. [2021-11-06 14:30:25,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 14:30:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 42063 states and 54628 transitions. [2021-11-06 14:30:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-06 14:30:25,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:25,930 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:25,960 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 14:30:26,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:26,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1782540335, now seen corresponding path program 1 times [2021-11-06 14:30:26,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:26,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462354428] [2021-11-06 14:30:26,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:26,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 14:30:26,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:26,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462354428] [2021-11-06 14:30:26,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462354428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:26,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:26,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:30:26,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190735415] [2021-11-06 14:30:26,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:26,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:26,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:26,579 INFO L87 Difference]: Start difference. First operand 42063 states and 54628 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 14:30:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:27,789 INFO L93 Difference]: Finished difference Result 95019 states and 123595 transitions. [2021-11-06 14:30:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 333 [2021-11-06 14:30:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:27,914 INFO L225 Difference]: With dead ends: 95019 [2021-11-06 14:30:27,914 INFO L226 Difference]: Without dead ends: 53051 [2021-11-06 14:30:27,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 14:30:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53051 states. [2021-11-06 14:30:29,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53051 to 53045. [2021-11-06 14:30:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53045 states, 53044 states have (on average 1.301636377347108) internal successors, (69044), 53044 states have internal predecessors, (69044), 0 states have call successors, (0), 0 states 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 14:30:29,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53045 states to 53045 states and 69044 transitions. [2021-11-06 14:30:29,202 INFO L78 Accepts]: Start accepts. Automaton has 53045 states and 69044 transitions. Word has length 333 [2021-11-06 14:30:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:29,202 INFO L470 AbstractCegarLoop]: Abstraction has 53045 states and 69044 transitions. [2021-11-06 14:30:29,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states 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 14:30:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 53045 states and 69044 transitions. [2021-11-06 14:30:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-06 14:30:29,246 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:29,247 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:29,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:30:29,247 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash -867384119, now seen corresponding path program 1 times [2021-11-06 14:30:29,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:29,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176977560] [2021-11-06 14:30:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:29,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-06 14:30:29,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:29,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176977560] [2021-11-06 14:30:29,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176977560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 14:30:29,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843048977] [2021-11-06 14:30:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:29,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:29,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:29,670 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 14:30:29,696 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 14:30:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:30,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 5063 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:30:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-06 14:30:31,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843048977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:31,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 14:30:31,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 14:30:31,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135962734] [2021-11-06 14:30:31,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:31,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:31,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:31,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:30:31,518 INFO L87 Difference]: Start difference. First operand 53045 states and 69044 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 14:30:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:33,130 INFO L93 Difference]: Finished difference Result 147437 states and 192626 transitions. [2021-11-06 14:30:33,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:33,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 337 [2021-11-06 14:30:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:33,278 INFO L225 Difference]: With dead ends: 147437 [2021-11-06 14:30:33,278 INFO L226 Difference]: Without dead ends: 94487 [2021-11-06 14:30:33,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:30:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94487 states. [2021-11-06 14:30:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94487 to 53073. [2021-11-06 14:30:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53073 states, 53072 states have (on average 1.3014772384684956) internal successors, (69072), 53072 states have internal predecessors, (69072), 0 states have call successors, (0), 0 states 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 14:30:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53073 states to 53073 states and 69072 transitions. [2021-11-06 14:30:34,701 INFO L78 Accepts]: Start accepts. Automaton has 53073 states and 69072 transitions. Word has length 337 [2021-11-06 14:30:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:34,702 INFO L470 AbstractCegarLoop]: Abstraction has 53073 states and 69072 transitions. [2021-11-06 14:30:34,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 14:30:34,702 INFO L276 IsEmpty]: Start isEmpty. Operand 53073 states and 69072 transitions. [2021-11-06 14:30:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-06 14:30:34,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:34,894 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:34,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-06 14:30:35,110 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,SelfDestructingSolverStorable9 [2021-11-06 14:30:35,111 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 55783307, now seen corresponding path program 1 times [2021-11-06 14:30:35,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:35,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132962219] [2021-11-06 14:30:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:35,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:35,227 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:30:35,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955871679] [2021-11-06 14:30:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:35,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:35,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:35,244 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 14:30:35,292 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 14:30:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:36,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 5062 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 14:30:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-06 14:30:37,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132962219] [2021-11-06 14:30:37,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:30:37,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955871679] [2021-11-06 14:30:37,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955871679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:37,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:37,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:30:37,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293588001] [2021-11-06 14:30:37,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:37,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:37,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:37,259 INFO L87 Difference]: Start difference. First operand 53073 states and 69072 transitions. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 14:30:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:39,442 INFO L93 Difference]: Finished difference Result 158021 states and 205772 transitions. [2021-11-06 14:30:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:39,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 337 [2021-11-06 14:30:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:39,696 INFO L225 Difference]: With dead ends: 158021 [2021-11-06 14:30:39,696 INFO L226 Difference]: Without dead ends: 105043 [2021-11-06 14:30:39,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 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 14:30:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105043 states. [2021-11-06 14:30:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105043 to 53129. [2021-11-06 14:30:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53129 states, 53128 states have (on average 1.3011594639361541) internal successors, (69128), 53128 states have internal predecessors, (69128), 0 states have call successors, (0), 0 states 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 14:30:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53129 states to 53129 states and 69128 transitions. [2021-11-06 14:30:41,945 INFO L78 Accepts]: Start accepts. Automaton has 53129 states and 69128 transitions. Word has length 337 [2021-11-06 14:30:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:41,946 INFO L470 AbstractCegarLoop]: Abstraction has 53129 states and 69128 transitions. [2021-11-06 14:30:41,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 14:30:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 53129 states and 69128 transitions. [2021-11-06 14:30:41,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-06 14:30:41,989 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:41,989 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:42,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-06 14:30:42,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:42,212 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash -733347065, now seen corresponding path program 1 times [2021-11-06 14:30:42,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:42,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775413765] [2021-11-06 14:30:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:42,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:42,416 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:30:42,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608974985] [2021-11-06 14:30:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:42,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:42,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:42,418 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 14:30:42,445 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 14:30:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:43,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 5075 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:30:43,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-06 14:30:45,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:45,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775413765] [2021-11-06 14:30:45,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:30:45,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608974985] [2021-11-06 14:30:45,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608974985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:45,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:45,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:30:45,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219485377] [2021-11-06 14:30:45,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:45,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:45,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:45,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:45,500 INFO L87 Difference]: Start difference. First operand 53129 states and 69128 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 14:30:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:30:48,061 INFO L93 Difference]: Finished difference Result 159113 states and 207004 transitions. [2021-11-06 14:30:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:30:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 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 339 [2021-11-06 14:30:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:30:48,285 INFO L225 Difference]: With dead ends: 159113 [2021-11-06 14:30:48,285 INFO L226 Difference]: Without dead ends: 106079 [2021-11-06 14:30:48,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 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 14:30:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106079 states. [2021-11-06 14:30:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106079 to 93977. [2021-11-06 14:30:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93977 states, 93976 states have (on average 1.31000468204648) internal successors, (123109), 93976 states have internal predecessors, (123109), 0 states have call successors, (0), 0 states 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 14:30:51,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93977 states to 93977 states and 123109 transitions. [2021-11-06 14:30:51,271 INFO L78 Accepts]: Start accepts. Automaton has 93977 states and 123109 transitions. Word has length 339 [2021-11-06 14:30:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:30:51,272 INFO L470 AbstractCegarLoop]: Abstraction has 93977 states and 123109 transitions. [2021-11-06 14:30:51,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 2 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 14:30:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 93977 states and 123109 transitions. [2021-11-06 14:30:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-06 14:30:51,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:30:51,361 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:30:51,389 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 14:30:51,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:51,576 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:30:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:30:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 989257328, now seen corresponding path program 1 times [2021-11-06 14:30:51,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:30:51,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271693835] [2021-11-06 14:30:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:51,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:30:51,688 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-06 14:30:51,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708738932] [2021-11-06 14:30:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:30:51,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 14:30:51,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:30:51,690 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 14:30:51,691 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 14:30:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:30:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 5076 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 14:30:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 14:30:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-06 14:30:55,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:30:55,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271693835] [2021-11-06 14:30:55,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-06 14:30:55,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708738932] [2021-11-06 14:30:55,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708738932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:30:55,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:30:55,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 14:30:55,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654267411] [2021-11-06 14:30:55,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:30:55,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:30:55,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:30:55,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:30:55,066 INFO L87 Difference]: Start difference. First operand 93977 states and 123109 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)