./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.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 3e9c6ba87a54868dec599f719996df2badd1b08d2641eaf7156cfe2e5d004f90 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 14:11:30,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 14:11:30,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 14:11:30,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 14:11:30,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 14:11:30,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 14:11:30,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 14:11:30,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 14:11:30,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 14:11:30,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 14:11:30,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 14:11:30,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 14:11:30,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 14:11:30,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 14:11:30,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 14:11:30,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 14:11:30,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 14:11:30,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 14:11:30,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 14:11:30,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 14:11:30,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 14:11:30,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 14:11:30,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 14:11:30,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 14:11:30,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 14:11:30,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 14:11:30,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 14:11:30,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 14:11:30,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 14:11:30,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 14:11:30,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 14:11:30,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 14:11:30,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 14:11:30,248 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 14:11:30,249 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 14:11:30,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 14:11:30,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 14:11:30,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 14:11:30,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 14:11:30,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 14:11:30,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 14:11:30,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 14:11:30,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 14:11:30,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 14:11:30,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 14:11:30,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 14:11:30,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 14:11:30,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 14:11:30,268 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 14:11:30,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 14:11:30,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 14:11:30,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 14:11:30,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 14:11:30,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 14:11:30,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 14:11:30,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 14:11:30,270 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 14:11:30,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 14:11:30,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 14:11:30,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 14:11:30,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 14:11:30,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 14:11:30,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 14:11:30,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 14:11:30,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 14:11:30,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 14:11:30,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 14:11:30,271 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 14:11:30,271 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 14:11:30,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 14:11:30,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 14:11:30,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e9c6ba87a54868dec599f719996df2badd1b08d2641eaf7156cfe2e5d004f90 [2021-11-07 14:11:30,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 14:11:30,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 14:11:30,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 14:11:30,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 14:11:30,483 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 14:11:30,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i [2021-11-07 14:11:30,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc1148df/9059f08cfa6a4990805469d10b6e75a8/FLAGedbf44c4d [2021-11-07 14:11:31,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 14:11:31,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i [2021-11-07 14:11:31,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc1148df/9059f08cfa6a4990805469d10b6e75a8/FLAGedbf44c4d [2021-11-07 14:11:31,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc1148df/9059f08cfa6a4990805469d10b6e75a8 [2021-11-07 14:11:31,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 14:11:31,270 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 14:11:31,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 14:11:31,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 14:11:31,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 14:11:31,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:31" (1/1) ... [2021-11-07 14:11:31,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d84df51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:31, skipping insertion in model container [2021-11-07 14:11:31,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:31" (1/1) ... [2021-11-07 14:11:31,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 14:11:31,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 14:11:32,283 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i[206964,206977] [2021-11-07 14:11:32,311 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-07 14:11:32,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 14:11:32,351 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 14:11:32,546 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i[206964,206977] [2021-11-07 14:11:32,552 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-07 14:11:32,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 14:11:32,638 INFO L208 MainTranslator]: Completed translation [2021-11-07 14:11:32,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32 WrapperNode [2021-11-07 14:11:32,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 14:11:32,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 14:11:32,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 14:11:32,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 14:11:32,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:32,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:32,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 14:11:32,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 14:11:32,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 14:11:32,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 14:11:32,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:32,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:32,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:32,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:33,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:33,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:33,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:33,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 14:11:33,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 14:11:33,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 14:11:33,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 14:11:33,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (1/1) ... [2021-11-07 14:11:33,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 14:11:33,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 14:11:33,285 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) [2021-11-07 14:11:33,306 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 [2021-11-07 14:11:33,316 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 14:11:33,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 14:11:33,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 14:11:33,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 14:11:33,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 14:11:33,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 14:11:58,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 14:11:58,272 INFO L299 CfgBuilder]: Removed 1852 assume(true) statements. [2021-11-07 14:11:58,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:58 BoogieIcfgContainer [2021-11-07 14:11:58,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 14:11:58,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 14:11:58,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 14:11:58,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 14:11:58,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:11:31" (1/3) ... [2021-11-07 14:11:58,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78bd2e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:58, skipping insertion in model container [2021-11-07 14:11:58,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32" (2/3) ... [2021-11-07 14:11:58,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78bd2e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:58, skipping insertion in model container [2021-11-07 14:11:58,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:58" (3/3) ... [2021-11-07 14:11:58,280 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--iio--accel--kxcjk-1013.ko-entry_point.cil.out.i [2021-11-07 14:11:58,283 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 14:11:58,284 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 14:11:58,336 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 14:11:58,341 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 [2021-11-07 14:11:58,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 14:11:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 2066 states, 2064 states have (on average 1.43265503875969) internal successors, (2957), 2065 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:11:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 14:11:58,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:11:58,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 14:11:58,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:11:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:11:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash -192666553, now seen corresponding path program 1 times [2021-11-07 14:11:58,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:11:58,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755902831] [2021-11-07 14:11:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:11:58,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:11:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:11:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 14:11:58,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:11:58,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755902831] [2021-11-07 14:11:58,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755902831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:11:58,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 14:11:58,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 14:11:58,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199499462] [2021-11-07 14:11:58,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:11:58,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 14:11:58,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:11:59,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 14:11:59,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 14:11:59,032 INFO L87 Difference]: Start difference. First operand has 2066 states, 2064 states have (on average 1.43265503875969) internal successors, (2957), 2065 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 59.0) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:11:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:11:59,159 INFO L93 Difference]: Finished difference Result 4128 states and 5909 transitions. [2021-11-07 14:11:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 14:11:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 59.0) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-07 14:11:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:11:59,181 INFO L225 Difference]: With dead ends: 4128 [2021-11-07 14:11:59,181 INFO L226 Difference]: Without dead ends: 2043 [2021-11-07 14:11:59,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 14:11:59,194 INFO L933 BasicCegarLoop]: 2931 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2931 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 14:11:59,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 23.17ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 14:11:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-11-07 14:11:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 2043. [2021-11-07 14:11:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2043 states, 2042 states have (on average 1.4147894221351616) internal successors, (2889), 2042 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:11:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2043 states to 2043 states and 2889 transitions. [2021-11-07 14:11:59,288 INFO L78 Accepts]: Start accepts. Automaton has 2043 states and 2889 transitions. Word has length 118 [2021-11-07 14:11:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:11:59,288 INFO L470 AbstractCegarLoop]: Abstraction has 2043 states and 2889 transitions. [2021-11-07 14:11:59,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 59.0) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:11:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2043 states and 2889 transitions. [2021-11-07 14:11:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 14:11:59,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:11:59,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 14:11:59,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 14:11:59,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:11:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:11:59,292 INFO L85 PathProgramCache]: Analyzing trace with hash 687142361, now seen corresponding path program 1 times [2021-11-07 14:11:59,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:11:59,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047104729] [2021-11-07 14:11:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:11:59,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:11:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:11:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 14:11:59,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:11:59,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047104729] [2021-11-07 14:11:59,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047104729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:11:59,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 14:11:59,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 14:11:59,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538852109] [2021-11-07 14:11:59,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:11:59,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 14:11:59,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:11:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 14:11:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 14:11:59,625 INFO L87 Difference]: Start difference. First operand 2043 states and 2889 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:01,697 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 14:12:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:01,890 INFO L93 Difference]: Finished difference Result 5897 states and 8399 transitions. [2021-11-07 14:12:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 14:12:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-07 14:12:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:01,904 INFO L225 Difference]: With dead ends: 5897 [2021-11-07 14:12:01,904 INFO L226 Difference]: Without dead ends: 3955 [2021-11-07 14:12:01,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.43ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 14:12:01,909 INFO L933 BasicCegarLoop]: 2886 mSDtfsCounter, 2726 mSDsluCounter, 2875 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2087.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2726 SdHoareTripleChecker+Valid, 5761 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.85ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2170.39ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:01,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2726 Valid, 5761 Invalid, 15 Unknown, 0 Unchecked, 8.85ms Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2170.39ms Time] [2021-11-07 14:12:01,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2021-11-07 14:12:01,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3955. [2021-11-07 14:12:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3955 states, 3954 states have (on average 1.422862923621649) internal successors, (5626), 3954 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3955 states to 3955 states and 5626 transitions. [2021-11-07 14:12:01,985 INFO L78 Accepts]: Start accepts. Automaton has 3955 states and 5626 transitions. Word has length 118 [2021-11-07 14:12:01,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:01,986 INFO L470 AbstractCegarLoop]: Abstraction has 3955 states and 5626 transitions. [2021-11-07 14:12:01,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3955 states and 5626 transitions. [2021-11-07 14:12:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 14:12:01,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:01,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 14:12:01,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 14:12:01,989 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 104069193, now seen corresponding path program 1 times [2021-11-07 14:12:01,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:01,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585258681] [2021-11-07 14:12:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:01,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 14:12:02,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:02,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585258681] [2021-11-07 14:12:02,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585258681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:02,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 14:12:02,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 14:12:02,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738393715] [2021-11-07 14:12:02,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:02,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 14:12:02,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:02,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 14:12:02,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 14:12:02,265 INFO L87 Difference]: Start difference. First operand 3955 states and 5626 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:02,370 INFO L93 Difference]: Finished difference Result 7809 states and 11133 transitions. [2021-11-07 14:12:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 14:12:02,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-11-07 14:12:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:02,394 INFO L225 Difference]: With dead ends: 7809 [2021-11-07 14:12:02,395 INFO L226 Difference]: Without dead ends: 7805 [2021-11-07 14:12:02,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.64ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 14:12:02,399 INFO L933 BasicCegarLoop]: 2897 mSDtfsCounter, 2766 mSDsluCounter, 2768 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2766 SdHoareTripleChecker+Valid, 5665 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.93ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:02,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2766 Valid, 5665 Invalid, 3 Unknown, 0 Unchecked, 7.17ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 5.93ms Time] [2021-11-07 14:12:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2021-11-07 14:12:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7805. [2021-11-07 14:12:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7805 states, 7804 states have (on average 1.425807278318811) internal successors, (11127), 7804 states have internal predecessors, (11127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7805 states to 7805 states and 11127 transitions. [2021-11-07 14:12:02,610 INFO L78 Accepts]: Start accepts. Automaton has 7805 states and 11127 transitions. Word has length 122 [2021-11-07 14:12:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:02,612 INFO L470 AbstractCegarLoop]: Abstraction has 7805 states and 11127 transitions. [2021-11-07 14:12:02,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7805 states and 11127 transitions. [2021-11-07 14:12:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 14:12:02,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:02,622 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-07 14:12:02,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 14:12:02,623 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:02,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2130557170, now seen corresponding path program 1 times [2021-11-07 14:12:02,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:02,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025704099] [2021-11-07 14:12:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:02,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 14:12:02,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:02,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025704099] [2021-11-07 14:12:02,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025704099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:02,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 14:12:02,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 14:12:02,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123390535] [2021-11-07 14:12:02,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:02,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 14:12:02,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 14:12:02,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 14:12:02,844 INFO L87 Difference]: Start difference. First operand 7805 states and 11127 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:03,137 INFO L93 Difference]: Finished difference Result 22269 states and 31890 transitions. [2021-11-07 14:12:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 14:12:03,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2021-11-07 14:12:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:03,196 INFO L225 Difference]: With dead ends: 22269 [2021-11-07 14:12:03,197 INFO L226 Difference]: Without dead ends: 14565 [2021-11-07 14:12:03,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.05ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 14:12:03,214 INFO L933 BasicCegarLoop]: 2895 mSDtfsCounter, 2548 mSDsluCounter, 2761 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2548 SdHoareTripleChecker+Valid, 5656 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.49ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.13ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:03,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2548 Valid, 5656 Invalid, 11 Unknown, 0 Unchecked, 6.49ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 67.13ms Time] [2021-11-07 14:12:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14565 states. [2021-11-07 14:12:03,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14565 to 14561. [2021-11-07 14:12:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14561 states, 14560 states have (on average 1.4337225274725274) internal successors, (20875), 14560 states have internal predecessors, (20875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14561 states to 14561 states and 20875 transitions. [2021-11-07 14:12:03,575 INFO L78 Accepts]: Start accepts. Automaton has 14561 states and 20875 transitions. Word has length 180 [2021-11-07 14:12:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:03,576 INFO L470 AbstractCegarLoop]: Abstraction has 14561 states and 20875 transitions. [2021-11-07 14:12:03,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 14561 states and 20875 transitions. [2021-11-07 14:12:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-07 14:12:03,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:03,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 14:12:03,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 14:12:03,592 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:03,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1298696450, now seen corresponding path program 1 times [2021-11-07 14:12:03,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:03,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991815858] [2021-11-07 14:12:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:03,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:03,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:03,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991815858] [2021-11-07 14:12:03,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991815858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 14:12:03,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142894131] [2021-11-07 14:12:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:03,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 14:12:03,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 14:12:03,884 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) [2021-11-07 14:12:03,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 14:12:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:04,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 4202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 14:12:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 14:12:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:05,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 14:12:05,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142894131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:05,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 14:12:05,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-07 14:12:05,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162518591] [2021-11-07 14:12:05,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:05,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 14:12:05,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:05,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 14:12:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 14:12:05,338 INFO L87 Difference]: Start difference. First operand 14561 states and 20875 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:06,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:06,457 INFO L93 Difference]: Finished difference Result 70545 states and 101387 transitions. [2021-11-07 14:12:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 14:12:06,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 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 218 [2021-11-07 14:12:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:06,593 INFO L225 Difference]: With dead ends: 70545 [2021-11-07 14:12:06,594 INFO L226 Difference]: Without dead ends: 56085 [2021-11-07 14:12:06,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.34ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 14:12:06,639 INFO L933 BasicCegarLoop]: 5490 mSDtfsCounter, 10208 mSDsluCounter, 10872 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10208 SdHoareTripleChecker+Valid, 16362 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.06ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 74.53ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:06,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10208 Valid, 16362 Invalid, 42 Unknown, 0 Unchecked, 22.06ms Time], IncrementalHoareTripleChecker [13 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 74.53ms Time] [2021-11-07 14:12:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56085 states. [2021-11-07 14:12:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56085 to 14569. [2021-11-07 14:12:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14569 states, 14568 states have (on average 1.433484349258649) internal successors, (20883), 14568 states have internal predecessors, (20883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:07,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14569 states to 14569 states and 20883 transitions. [2021-11-07 14:12:07,344 INFO L78 Accepts]: Start accepts. Automaton has 14569 states and 20883 transitions. Word has length 218 [2021-11-07 14:12:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:07,344 INFO L470 AbstractCegarLoop]: Abstraction has 14569 states and 20883 transitions. [2021-11-07 14:12:07,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:07,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14569 states and 20883 transitions. [2021-11-07 14:12:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-07 14:12:07,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:07,361 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 14:12:07,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 14:12:07,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 14:12:07,572 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1413250717, now seen corresponding path program 1 times [2021-11-07 14:12:07,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:07,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242294003] [2021-11-07 14:12:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:07,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:07,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:07,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242294003] [2021-11-07 14:12:07,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242294003] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 14:12:07,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695643415] [2021-11-07 14:12:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:07,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 14:12:07,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 14:12:07,876 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) [2021-11-07 14:12:07,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 14:12:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:08,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 4484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 14:12:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 14:12:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:09,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 14:12:09,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695643415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:09,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 14:12:09,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-07 14:12:09,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557014188] [2021-11-07 14:12:09,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:09,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 14:12:09,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:09,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 14:12:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 14:12:09,212 INFO L87 Difference]: Start difference. First operand 14569 states and 20883 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:10,620 INFO L93 Difference]: Finished difference Result 68709 states and 98555 transitions. [2021-11-07 14:12:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 14:12:10,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 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 245 [2021-11-07 14:12:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:10,838 INFO L225 Difference]: With dead ends: 68709 [2021-11-07 14:12:10,838 INFO L226 Difference]: Without dead ends: 54241 [2021-11-07 14:12:10,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.25ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 14:12:10,866 INFO L933 BasicCegarLoop]: 9707 mSDtfsCounter, 5207 mSDsluCounter, 10205 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5207 SdHoareTripleChecker+Valid, 19912 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.53ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 518.91ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:10,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5207 Valid, 19912 Invalid, 344 Unknown, 0 Unchecked, 21.53ms Time], IncrementalHoareTripleChecker [62 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 518.91ms Time] [2021-11-07 14:12:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54241 states. [2021-11-07 14:12:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54241 to 14585. [2021-11-07 14:12:11,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14585 states, 14584 states have (on average 1.4330087767416346) internal successors, (20899), 14584 states have internal predecessors, (20899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14585 states to 14585 states and 20899 transitions. [2021-11-07 14:12:11,504 INFO L78 Accepts]: Start accepts. Automaton has 14585 states and 20899 transitions. Word has length 245 [2021-11-07 14:12:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:11,504 INFO L470 AbstractCegarLoop]: Abstraction has 14585 states and 20899 transitions. [2021-11-07 14:12:11,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 4 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 14585 states and 20899 transitions. [2021-11-07 14:12:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-11-07 14:12:11,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:11,519 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 14:12:11,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 14:12:11,735 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,SelfDestructingSolverStorable5 [2021-11-07 14:12:11,736 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1161637369, now seen corresponding path program 1 times [2021-11-07 14:12:11,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:11,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607795718] [2021-11-07 14:12:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:11,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:12,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:12,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607795718] [2021-11-07 14:12:12,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607795718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 14:12:12,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106348889] [2021-11-07 14:12:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:12,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 14:12:12,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 14:12:12,009 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) [2021-11-07 14:12:12,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 14:12:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 4542 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 14:12:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 14:12:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:13,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 14:12:13,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106348889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:13,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 14:12:13,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-07 14:12:13,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126370624] [2021-11-07 14:12:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:13,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 14:12:13,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:13,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 14:12:13,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 14:12:13,337 INFO L87 Difference]: Start difference. First operand 14585 states and 20899 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:14,435 INFO L93 Difference]: Finished difference Result 70817 states and 101699 transitions. [2021-11-07 14:12:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 14:12:14,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 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 253 [2021-11-07 14:12:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:14,537 INFO L225 Difference]: With dead ends: 70817 [2021-11-07 14:12:14,538 INFO L226 Difference]: Without dead ends: 56333 [2021-11-07 14:12:14,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.89ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 14:12:14,576 INFO L933 BasicCegarLoop]: 10575 mSDtfsCounter, 5231 mSDsluCounter, 10860 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5231 SdHoareTripleChecker+Valid, 21435 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.94ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 139.83ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:14,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5231 Valid, 21435 Invalid, 75 Unknown, 0 Unchecked, 13.94ms Time], IncrementalHoareTripleChecker [14 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 139.83ms Time] [2021-11-07 14:12:14,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56333 states. [2021-11-07 14:12:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56333 to 14593. [2021-11-07 14:12:15,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14593 states, 14592 states have (on average 1.4327713815789473) internal successors, (20907), 14592 states have internal predecessors, (20907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14593 states to 14593 states and 20907 transitions. [2021-11-07 14:12:15,252 INFO L78 Accepts]: Start accepts. Automaton has 14593 states and 20907 transitions. Word has length 253 [2021-11-07 14:12:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:15,254 INFO L470 AbstractCegarLoop]: Abstraction has 14593 states and 20907 transitions. [2021-11-07 14:12:15,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 14593 states and 20907 transitions. [2021-11-07 14:12:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-07 14:12:15,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:15,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-11-07 14:12:15,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 14:12:15,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 14:12:15,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1223929376, now seen corresponding path program 1 times [2021-11-07 14:12:15,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:15,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399323974] [2021-11-07 14:12:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:15,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:15,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:15,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399323974] [2021-11-07 14:12:15,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399323974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 14:12:15,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221632626] [2021-11-07 14:12:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:15,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 14:12:15,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 14:12:15,745 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) [2021-11-07 14:12:15,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 14:12:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:16,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 4572 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 14:12:16,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 14:12:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:17,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 14:12:17,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221632626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:17,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 14:12:17,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-07 14:12:17,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265798150] [2021-11-07 14:12:17,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:17,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 14:12:17,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:17,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 14:12:17,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 14:12:17,131 INFO L87 Difference]: Start difference. First operand 14593 states and 20907 transitions. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:19,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 14:12:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:20,364 INFO L93 Difference]: Finished difference Result 43579 states and 62484 transitions. [2021-11-07 14:12:20,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 14:12:20,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 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 255 [2021-11-07 14:12:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:20,422 INFO L225 Difference]: With dead ends: 43579 [2021-11-07 14:12:20,423 INFO L226 Difference]: Without dead ends: 43575 [2021-11-07 14:12:20,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.67ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 14:12:20,433 INFO L933 BasicCegarLoop]: 5630 mSDtfsCounter, 5494 mSDsluCounter, 5630 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2106.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5494 SdHoareTripleChecker+Valid, 11260 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.93ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2197.04ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:20,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5494 Valid, 11260 Invalid, 70 Unknown, 0 Unchecked, 13.93ms Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 1 Unknown, 0 Unchecked, 2197.04ms Time] [2021-11-07 14:12:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43575 states. [2021-11-07 14:12:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43575 to 43141. [2021-11-07 14:12:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43141 states, 43140 states have (on average 1.4353963838664812) internal successors, (61923), 43140 states have internal predecessors, (61923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43141 states to 43141 states and 61923 transitions. [2021-11-07 14:12:21,684 INFO L78 Accepts]: Start accepts. Automaton has 43141 states and 61923 transitions. Word has length 255 [2021-11-07 14:12:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:21,684 INFO L470 AbstractCegarLoop]: Abstraction has 43141 states and 61923 transitions. [2021-11-07 14:12:21,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:21,685 INFO L276 IsEmpty]: Start isEmpty. Operand 43141 states and 61923 transitions. [2021-11-07 14:12:21,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-07 14:12:21,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:21,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-11-07 14:12:21,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 14:12:21,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 14:12:21,939 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:21,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1076893214, now seen corresponding path program 1 times [2021-11-07 14:12:21,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:21,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889954295] [2021-11-07 14:12:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:21,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:22,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:22,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889954295] [2021-11-07 14:12:22,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889954295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:22,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 14:12:22,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 14:12:22,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925334071] [2021-11-07 14:12:22,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:22,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 14:12:22,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 14:12:22,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 14:12:22,368 INFO L87 Difference]: Start difference. First operand 43141 states and 61923 transitions. Second operand has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:30,129 INFO L93 Difference]: Finished difference Result 295057 states and 424287 transitions. [2021-11-07 14:12:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 14:12:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 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 255 [2021-11-07 14:12:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:30,943 INFO L225 Difference]: With dead ends: 295057 [2021-11-07 14:12:30,943 INFO L226 Difference]: Without dead ends: 252017 [2021-11-07 14:12:31,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.68ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-07 14:12:31,066 INFO L933 BasicCegarLoop]: 8210 mSDtfsCounter, 24058 mSDsluCounter, 40483 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24058 SdHoareTripleChecker+Valid, 48693 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.12ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.94ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:31,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24058 Valid, 48693 Invalid, 98 Unknown, 0 Unchecked, 37.12ms Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 192.94ms Time] [2021-11-07 14:12:31,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252017 states. [2021-11-07 14:12:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252017 to 43201. [2021-11-07 14:12:34,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43201 states, 43200 states have (on average 1.4350694444444445) internal successors, (61995), 43200 states have internal predecessors, (61995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43201 states to 43201 states and 61995 transitions. [2021-11-07 14:12:34,417 INFO L78 Accepts]: Start accepts. Automaton has 43201 states and 61995 transitions. Word has length 255 [2021-11-07 14:12:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:34,417 INFO L470 AbstractCegarLoop]: Abstraction has 43201 states and 61995 transitions. [2021-11-07 14:12:34,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 35.0) internal successors, (245), 7 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 43201 states and 61995 transitions. [2021-11-07 14:12:34,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-07 14:12:34,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:34,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-11-07 14:12:34,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 14:12:34,454 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash -294914084, now seen corresponding path program 1 times [2021-11-07 14:12:34,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:34,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524422672] [2021-11-07 14:12:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:34,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:35,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:35,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524422672] [2021-11-07 14:12:35,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524422672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:35,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 14:12:35,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 14:12:35,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442097768] [2021-11-07 14:12:35,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:35,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 14:12:35,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 14:12:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 14:12:35,016 INFO L87 Difference]: Start difference. First operand 43201 states and 61995 transitions. Second operand has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 14:12:40,497 INFO L93 Difference]: Finished difference Result 169729 states and 243987 transitions. [2021-11-07 14:12:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 14:12:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 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 255 [2021-11-07 14:12:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 14:12:40,757 INFO L225 Difference]: With dead ends: 169729 [2021-11-07 14:12:40,757 INFO L226 Difference]: Without dead ends: 126629 [2021-11-07 14:12:40,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.58ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 14:12:40,816 INFO L933 BasicCegarLoop]: 5554 mSDtfsCounter, 10310 mSDsluCounter, 13955 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10310 SdHoareTripleChecker+Valid, 19509 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.77ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.24ms IncrementalHoareTripleChecker+Time [2021-11-07 14:12:40,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10310 Valid, 19509 Invalid, 58 Unknown, 0 Unchecked, 17.77ms Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 180.24ms Time] [2021-11-07 14:12:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126629 states. [2021-11-07 14:12:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126629 to 43237. [2021-11-07 14:12:43,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43237 states, 43236 states have (on average 1.434707188454066) internal successors, (62031), 43236 states have internal predecessors, (62031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43237 states to 43237 states and 62031 transitions. [2021-11-07 14:12:43,722 INFO L78 Accepts]: Start accepts. Automaton has 43237 states and 62031 transitions. Word has length 255 [2021-11-07 14:12:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 14:12:43,722 INFO L470 AbstractCegarLoop]: Abstraction has 43237 states and 62031 transitions. [2021-11-07 14:12:43,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 14:12:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43237 states and 62031 transitions. [2021-11-07 14:12:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-07 14:12:43,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 14:12:43,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 14:12:43,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 14:12:43,754 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 14:12:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 14:12:43,754 INFO L85 PathProgramCache]: Analyzing trace with hash -675431404, now seen corresponding path program 1 times [2021-11-07 14:12:43,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 14:12:43,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536843872] [2021-11-07 14:12:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 14:12:43,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 14:12:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 14:12:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 14:12:44,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 14:12:44,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536843872] [2021-11-07 14:12:44,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536843872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 14:12:44,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 14:12:44,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 14:12:44,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365991234] [2021-11-07 14:12:44,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 14:12:44,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 14:12:44,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 14:12:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 14:12:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 14:12:44,026 INFO L87 Difference]: Start difference. First operand 43237 states and 62031 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)