/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:41:03,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:41:03,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:41:03,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:41:03,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:41:03,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:41:03,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:41:03,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:41:03,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:41:03,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:41:03,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:41:03,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:41:03,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:41:03,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:41:03,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:41:03,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:41:03,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:41:03,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:41:03,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:41:03,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:41:03,286 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:41:03,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:41:03,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:41:03,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:41:03,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 21:41:03,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 21:41:03,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 21:41:03,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 21:41:03,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 21:41:03,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 21:41:03,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:41:03,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:41:03,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:41:03,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:41:03,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:41:03,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:41:03,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:41:03,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:41:03,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:41:03,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:41:03,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:41:03,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2020-07-21 21:41:03,335 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:41:03,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:41:03,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:41:03,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:41:03,338 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:41:03,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:41:03,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:41:03,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:41:03,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:41:03,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:41:03,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:41:03,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:41:03,341 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:41:03,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:41:03,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:41:03,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:41:03,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:41:03,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:41:03,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:41:03,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:41:03,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:41:03,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:41:03,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:41:03,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:03,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:41:03,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:41:03,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-21 21:41:03,344 INFO L138 SettingsManager]: * To the following directory=dump/ Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 21:41:03,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:41:03,641 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:41:03,645 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:41:03,649 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:41:03,650 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:41:03,651 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-07-21 21:41:03,726 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea225cdc/fef077f545be465e8f44e3c93e592f22/FLAGc1a4e5679 [2020-07-21 21:41:04,532 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:41:04,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-07-21 21:41:04,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea225cdc/fef077f545be465e8f44e3c93e592f22/FLAGc1a4e5679 [2020-07-21 21:41:05,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea225cdc/fef077f545be465e8f44e3c93e592f22 [2020-07-21 21:41:05,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:41:05,091 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:41:05,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:41:05,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:41:05,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:41:05,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:41:05" (1/1) ... [2020-07-21 21:41:05,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118b3e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:05, skipping insertion in model container [2020-07-21 21:41:05,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:41:05" (1/1) ... [2020-07-21 21:41:05,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:41:05,225 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:41:06,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:41:06,883 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:41:07,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:41:07,217 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:41:07,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07 WrapperNode [2020-07-21 21:41:07,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:41:07,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:41:07,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:41:07,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:41:07,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (1/1) ... [2020-07-21 21:41:07,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (1/1) ... [2020-07-21 21:41:07,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (1/1) ... [2020-07-21 21:41:07,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (1/1) ... [2020-07-21 21:41:07,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (1/1) ... [2020-07-21 21:41:07,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (1/1) ... [2020-07-21 21:41:07,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (1/1) ... [2020-07-21 21:41:07,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:41:07,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:41:07,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:41:07,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:41:07,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:41:07,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:41:07,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:41:07,507 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2020-07-21 21:41:07,507 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2020-07-21 21:41:07,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2020-07-21 21:41:07,508 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromio [2020-07-21 21:41:07,508 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2020-07-21 21:41:07,508 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2020-07-21 21:41:07,508 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2020-07-21 21:41:07,509 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-07-21 21:41:07,509 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-07-21 21:41:07,509 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-07-21 21:41:07,509 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:41:07,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-07-21 21:41:07,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-07-21 21:41:07,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2020-07-21 21:41:07,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2020-07-21 21:41:07,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-07-21 21:41:07,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-07-21 21:41:07,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-07-21 21:41:07,512 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2020-07-21 21:41:07,512 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2020-07-21 21:41:07,512 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_probe [2020-07-21 21:41:07,512 INFO L138 BoogieDeclarations]: Found implementation of procedure check_mirror [2020-07-21 21:41:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_found [2020-07-21 21:41:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_command [2020-07-21 21:41:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_status [2020-07-21 21:41:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_setmask [2020-07-21 21:41:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_reset [2020-07-21 21:41:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_to_card [2020-07-21 21:41:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_from_card [2020-07-21 21:41:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_init [2020-07-21 21:41:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_exit [2020-07-21 21:41:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2020-07-21 21:41:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2020-07-21 21:41:07,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2020-07-21 21:41:07,515 INFO L138 BoogieDeclarations]: Found implementation of procedure choose_interrupt_1 [2020-07-21 21:41:07,515 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2020-07-21 21:41:07,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:41:07,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq_5 [2020-07-21 21:41:07,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_6 [2020-07-21 21:41:07,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_7 [2020-07-21 21:41:07,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-07-21 21:41:07,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2020-07-21 21:41:07,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2020-07-21 21:41:07,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2020-07-21 21:41:07,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2020-07-21 21:41:07,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2020-07-21 21:41:07,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2020-07-21 21:41:07,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2020-07-21 21:41:07,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2020-07-21 21:41:07,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2020-07-21 21:41:07,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-07-21 21:41:07,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2020-07-21 21:41:07,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2020-07-21 21:41:07,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2020-07-21 21:41:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_arcdev [2020-07-21 21:41:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure arcnet_interrupt [2020-07-21 21:41:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2020-07-21 21:41:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2020-07-21 21:41:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2020-07-21 21:41:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2020-07-21 21:41:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-07-21 21:41:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2020-07-21 21:41:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_off [2020-07-21 21:41:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_on [2020-07-21 21:41:07,520 INFO L138 BoogieDeclarations]: Found implementation of procedure register_netdev [2020-07-21 21:41:07,521 INFO L138 BoogieDeclarations]: Found implementation of procedure request_threaded_irq [2020-07-21 21:41:07,521 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2020-07-21 21:41:07,521 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-07-21 21:41:07,521 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-07-21 21:41:07,521 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-21 21:41:07,522 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2020-07-21 21:41:07,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:41:07,522 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2020-07-21 21:41:07,522 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-21 21:41:07,522 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-07-21 21:41:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2020-07-21 21:41:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2020-07-21 21:41:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2020-07-21 21:41:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2020-07-21 21:41:07,523 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2020-07-21 21:41:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2020-07-21 21:41:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2020-07-21 21:41:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromio [2020-07-21 21:41:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2020-07-21 21:41:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2020-07-21 21:41:07,524 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2020-07-21 21:41:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2020-07-21 21:41:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-07-21 21:41:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-07-21 21:41:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-07-21 21:41:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-07-21 21:41:07,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 21:41:07,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-21 21:41:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2020-07-21 21:41:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2020-07-21 21:41:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-07-21 21:41:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-07-21 21:41:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-07-21 21:41:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-07-21 21:41:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2020-07-21 21:41:07,527 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2020-07-21 21:41:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2020-07-21 21:41:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure choose_interrupt_1 [2020-07-21 21:41:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2020-07-21 21:41:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure request_threaded_irq [2020-07-21 21:41:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2020-07-21 21:41:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq_5 [2020-07-21 21:41:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2020-07-21 21:41:07,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_6 [2020-07-21 21:41:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_7 [2020-07-21 21:41:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_on [2020-07-21 21:41:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_off [2020-07-21 21:41:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2020-07-21 21:41:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2020-07-21 21:41:07,529 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2020-07-21 21:41:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure register_netdev [2020-07-21 21:41:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2020-07-21 21:41:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure arcnet_interrupt [2020-07-21 21:41:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_arcdev [2020-07-21 21:41:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_found [2020-07-21 21:41:07,530 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_command [2020-07-21 21:41:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_status [2020-07-21 21:41:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_setmask [2020-07-21 21:41:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_reset [2020-07-21 21:41:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_to_card [2020-07-21 21:41:07,531 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_from_card [2020-07-21 21:41:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_probe [2020-07-21 21:41:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 21:41:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 21:41:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 21:41:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 21:41:07,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 21:41:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 21:41:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure check_mirror [2020-07-21 21:41:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_init [2020-07-21 21:41:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_exit [2020-07-21 21:41:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-07-21 21:41:07,533 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-07-21 21:41:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:41:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-07-21 21:41:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2020-07-21 21:41:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2020-07-21 21:41:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2020-07-21 21:41:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2020-07-21 21:41:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2020-07-21 21:41:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2020-07-21 21:41:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2020-07-21 21:41:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2020-07-21 21:41:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2020-07-21 21:41:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 21:41:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:41:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 21:41:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:41:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-07-21 21:41:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-07-21 21:41:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-07-21 21:41:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-07-21 21:41:08,465 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-07-21 21:41:08,471 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2020-07-21 21:41:12,339 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:41:12,339 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 21:41:12,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:41:12 BoogieIcfgContainer [2020-07-21 21:41:12,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:41:12,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:41:12,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:41:12,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:41:12,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:41:05" (1/3) ... [2020-07-21 21:41:12,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdfe9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:41:12, skipping insertion in model container [2020-07-21 21:41:12,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:41:07" (2/3) ... [2020-07-21 21:41:12,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bdfe9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:41:12, skipping insertion in model container [2020-07-21 21:41:12,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:41:12" (3/3) ... [2020-07-21 21:41:12,357 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-07-21 21:41:12,368 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:41:12,378 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 21:41:12,393 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 21:41:12,422 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:41:12,423 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:41:12,423 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:41:12,423 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:41:12,423 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:41:12,423 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:41:12,424 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:41:12,424 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:41:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states. [2020-07-21 21:41:12,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 21:41:12,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:41:12,467 INFO L422 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] [2020-07-21 21:41:12,467 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:41:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:41:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash 915174829, now seen corresponding path program 1 times [2020-07-21 21:41:12,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:41:12,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998169511] [2020-07-21 21:41:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:13,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:41:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:41:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:41:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:41:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:13,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:41:13,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998169511] [2020-07-21 21:41:13,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:41:13,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:41:13,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186304274] [2020-07-21 21:41:13,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:41:13,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:41:13,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:41:13,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:41:13,685 INFO L87 Difference]: Start difference. First operand 599 states. Second operand 3 states. [2020-07-21 21:41:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:41:13,937 INFO L93 Difference]: Finished difference Result 1133 states and 1613 transitions. [2020-07-21 21:41:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:41:13,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 21:41:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:41:13,962 INFO L225 Difference]: With dead ends: 1133 [2020-07-21 21:41:13,962 INFO L226 Difference]: Without dead ends: 590 [2020-07-21 21:41:13,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:41:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-07-21 21:41:14,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2020-07-21 21:41:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-21 21:41:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 814 transitions. [2020-07-21 21:41:14,086 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 814 transitions. Word has length 26 [2020-07-21 21:41:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:41:14,087 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 814 transitions. [2020-07-21 21:41:14,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:41:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 814 transitions. [2020-07-21 21:41:14,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 21:41:14,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:41:14,090 INFO L422 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] [2020-07-21 21:41:14,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:14,304 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:41:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:41:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash 568046743, now seen corresponding path program 1 times [2020-07-21 21:41:14,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:41:14,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542037668] [2020-07-21 21:41:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:15,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:41:15,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:41:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 872 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:41:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:41:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:15,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:41:15,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542037668] [2020-07-21 21:41:15,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:41:15,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:41:15,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315962370] [2020-07-21 21:41:15,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:41:15,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:41:15,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:41:15,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:41:15,153 INFO L87 Difference]: Start difference. First operand 590 states and 814 transitions. Second operand 3 states. [2020-07-21 21:41:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:41:15,190 INFO L93 Difference]: Finished difference Result 1170 states and 1620 transitions. [2020-07-21 21:41:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:41:15,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-21 21:41:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:41:15,195 INFO L225 Difference]: With dead ends: 1170 [2020-07-21 21:41:15,196 INFO L226 Difference]: Without dead ends: 590 [2020-07-21 21:41:15,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:41:15,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-07-21 21:41:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2020-07-21 21:41:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-21 21:41:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 813 transitions. [2020-07-21 21:41:15,233 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 813 transitions. Word has length 38 [2020-07-21 21:41:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:41:15,234 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 813 transitions. [2020-07-21 21:41:15,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:41:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 813 transitions. [2020-07-21 21:41:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 21:41:15,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:41:15,237 INFO L422 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] [2020-07-21 21:41:15,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:15,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:41:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:41:15,453 INFO L82 PathProgramCache]: Analyzing trace with hash -100070499, now seen corresponding path program 1 times [2020-07-21 21:41:15,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:41:15,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220573728] [2020-07-21 21:41:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:16,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:41:16,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:41:16,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:41:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:41:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:16,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:41:16,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220573728] [2020-07-21 21:41:16,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:41:16,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:41:16,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874820080] [2020-07-21 21:41:16,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:41:16,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:41:16,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:41:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:41:16,151 INFO L87 Difference]: Start difference. First operand 590 states and 813 transitions. Second operand 3 states. [2020-07-21 21:41:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:41:16,207 INFO L93 Difference]: Finished difference Result 600 states and 821 transitions. [2020-07-21 21:41:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:41:16,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-07-21 21:41:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:41:16,211 INFO L225 Difference]: With dead ends: 600 [2020-07-21 21:41:16,212 INFO L226 Difference]: Without dead ends: 595 [2020-07-21 21:41:16,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:41:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-07-21 21:41:16,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 590. [2020-07-21 21:41:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-21 21:41:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 812 transitions. [2020-07-21 21:41:16,241 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 812 transitions. Word has length 60 [2020-07-21 21:41:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:41:16,242 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 812 transitions. [2020-07-21 21:41:16,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:41:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 812 transitions. [2020-07-21 21:41:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 21:41:16,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:41:16,245 INFO L422 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] [2020-07-21 21:41:16,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:16,459 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:41:16,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:41:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash -42812197, now seen corresponding path program 1 times [2020-07-21 21:41:16,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:41:16,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064673019] [2020-07-21 21:41:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:17,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:41:17,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:41:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:41:17,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:41:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:17,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:41:17,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064673019] [2020-07-21 21:41:17,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:41:17,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:41:17,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465661241] [2020-07-21 21:41:17,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:41:17,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:41:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:41:17,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:41:17,126 INFO L87 Difference]: Start difference. First operand 590 states and 812 transitions. Second operand 4 states. [2020-07-21 21:41:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:41:19,483 INFO L93 Difference]: Finished difference Result 1730 states and 2392 transitions. [2020-07-21 21:41:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:41:19,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-21 21:41:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:41:19,496 INFO L225 Difference]: With dead ends: 1730 [2020-07-21 21:41:19,496 INFO L226 Difference]: Without dead ends: 1150 [2020-07-21 21:41:19,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:41:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2020-07-21 21:41:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1094. [2020-07-21 21:41:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-07-21 21:41:19,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1523 transitions. [2020-07-21 21:41:19,597 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1523 transitions. Word has length 60 [2020-07-21 21:41:19,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:41:19,599 INFO L479 AbstractCegarLoop]: Abstraction has 1094 states and 1523 transitions. [2020-07-21 21:41:19,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:41:19,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1523 transitions. [2020-07-21 21:41:19,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 21:41:19,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:41:19,605 INFO L422 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] [2020-07-21 21:41:19,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:19,807 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:41:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:41:19,808 INFO L82 PathProgramCache]: Analyzing trace with hash -437178983, now seen corresponding path program 1 times [2020-07-21 21:41:19,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:41:19,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857628984] [2020-07-21 21:41:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:20,383 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:41:20,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:41:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:41:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:41:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:20,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:41:20,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857628984] [2020-07-21 21:41:20,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:41:20,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:41:20,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467252833] [2020-07-21 21:41:20,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:41:20,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:41:20,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:41:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:41:20,417 INFO L87 Difference]: Start difference. First operand 1094 states and 1523 transitions. Second operand 3 states. [2020-07-21 21:41:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:41:20,483 INFO L93 Difference]: Finished difference Result 2182 states and 3047 transitions. [2020-07-21 21:41:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:41:20,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-07-21 21:41:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:41:20,490 INFO L225 Difference]: With dead ends: 2182 [2020-07-21 21:41:20,491 INFO L226 Difference]: Without dead ends: 1098 [2020-07-21 21:41:20,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:41:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2020-07-21 21:41:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1098. [2020-07-21 21:41:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-07-21 21:41:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1527 transitions. [2020-07-21 21:41:20,558 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1527 transitions. Word has length 60 [2020-07-21 21:41:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:41:20,559 INFO L479 AbstractCegarLoop]: Abstraction has 1098 states and 1527 transitions. [2020-07-21 21:41:20,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:41:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1527 transitions. [2020-07-21 21:41:20,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 21:41:20,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:41:20,561 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 21:41:20,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:20,776 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:41:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:41:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1237303988, now seen corresponding path program 1 times [2020-07-21 21:41:20,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:41:20,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639162053] [2020-07-21 21:41:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:21,355 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:41:21,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:41:21,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:41:21,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:41:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:21,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 21:41:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:21,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639162053] [2020-07-21 21:41:21,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 21:41:21,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 21:41:21,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297424400] [2020-07-21 21:41:21,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 21:41:21,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:41:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 21:41:21,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:41:21,531 INFO L87 Difference]: Start difference. First operand 1098 states and 1527 transitions. Second operand 6 states. [2020-07-21 21:41:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:41:23,713 INFO L93 Difference]: Finished difference Result 2198 states and 3067 transitions. [2020-07-21 21:41:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 21:41:23,714 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-07-21 21:41:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:41:23,721 INFO L225 Difference]: With dead ends: 2198 [2020-07-21 21:41:23,721 INFO L226 Difference]: Without dead ends: 1110 [2020-07-21 21:41:23,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 21:41:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2020-07-21 21:41:23,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2020-07-21 21:41:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1110 states. [2020-07-21 21:41:23,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1539 transitions. [2020-07-21 21:41:23,784 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1539 transitions. Word has length 62 [2020-07-21 21:41:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:41:23,785 INFO L479 AbstractCegarLoop]: Abstraction has 1110 states and 1539 transitions. [2020-07-21 21:41:23,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 21:41:23,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1539 transitions. [2020-07-21 21:41:23,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 21:41:23,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:41:23,787 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:41:24,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:24,001 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:41:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:41:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1548296581, now seen corresponding path program 2 times [2020-07-21 21:41:24,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:41:24,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811796687] [2020-07-21 21:41:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:24,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:41:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:41:24,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 21:41:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:41:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:24,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 21:41:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:27,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811796687] [2020-07-21 21:41:27,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 21:41:27,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 21:41:27,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225618177] [2020-07-21 21:41:28,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 21:41:28,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:41:28,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 21:41:28,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=85, Unknown=1, NotChecked=0, Total=132 [2020-07-21 21:41:28,001 INFO L87 Difference]: Start difference. First operand 1110 states and 1539 transitions. Second operand 12 states. [2020-07-21 21:41:28,223 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 21:41:30,374 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-21 21:41:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:41:30,616 INFO L93 Difference]: Finished difference Result 2234 states and 3109 transitions. [2020-07-21 21:41:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:41:30,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-07-21 21:41:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:41:30,628 INFO L225 Difference]: With dead ends: 2234 [2020-07-21 21:41:30,628 INFO L226 Difference]: Without dead ends: 1134 [2020-07-21 21:41:30,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=94, Invalid=145, Unknown=1, NotChecked=0, Total=240 [2020-07-21 21:41:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2020-07-21 21:41:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2020-07-21 21:41:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1134 states. [2020-07-21 21:41:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1563 transitions. [2020-07-21 21:41:30,703 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1563 transitions. Word has length 68 [2020-07-21 21:41:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:41:30,705 INFO L479 AbstractCegarLoop]: Abstraction has 1134 states and 1563 transitions. [2020-07-21 21:41:30,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 21:41:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1563 transitions. [2020-07-21 21:41:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 21:41:30,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:41:30,708 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:41:30,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:30,923 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:41:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:41:30,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1070658329, now seen corresponding path program 3 times [2020-07-21 21:41:30,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:41:30,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920643966] [2020-07-21 21:41:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:41:31,468 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:41:31,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:41:31,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 21:41:31,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:41:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:31,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 21:41:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 106 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:41:40,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920643966] [2020-07-21 21:41:40,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 21:41:40,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 21:41:40,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044492023] [2020-07-21 21:41:40,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 21:41:40,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:41:40,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 21:41:40,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=382, Unknown=4, NotChecked=0, Total=552 [2020-07-21 21:41:40,473 INFO L87 Difference]: Start difference. First operand 1134 states and 1563 transitions. Second operand 24 states. [2020-07-21 21:41:49,463 WARN L193 SmtUtils]: Spent 8.64 s on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 21:41:52,497 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 21:41:53,216 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 21:41:54,299 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 21:41:55,487 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 21:42:00,075 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 21:42:04,496 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 26 DAG size of output: 11 [2020-07-21 21:42:07,445 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-21 21:42:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:42:16,081 INFO L93 Difference]: Finished difference Result 2306 states and 3193 transitions. [2020-07-21 21:42:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 21:42:16,082 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 80 [2020-07-21 21:42:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:42:16,089 INFO L225 Difference]: With dead ends: 2306 [2020-07-21 21:42:16,089 INFO L226 Difference]: Without dead ends: 1182 [2020-07-21 21:42:16,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=405, Invalid=712, Unknown=5, NotChecked=0, Total=1122 [2020-07-21 21:42:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2020-07-21 21:42:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2020-07-21 21:42:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2020-07-21 21:42:16,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1611 transitions. [2020-07-21 21:42:16,141 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1611 transitions. Word has length 80 [2020-07-21 21:42:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:42:16,141 INFO L479 AbstractCegarLoop]: Abstraction has 1182 states and 1611 transitions. [2020-07-21 21:42:16,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 21:42:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1611 transitions. [2020-07-21 21:42:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-21 21:42:16,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:42:16,143 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:42:16,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:42:16,358 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:42:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:42:16,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1070029483, now seen corresponding path program 4 times [2020-07-21 21:42:16,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:42:16,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464555339] [2020-07-21 21:42:16,359 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:42:16,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:42:16,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:42:16,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 21:42:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:42:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:42:17,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 21:42:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 502 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:42:39,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464555339] [2020-07-21 21:42:39,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 21:42:39,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 21:42:39,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267115789] [2020-07-21 21:42:39,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 21:42:39,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:42:39,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 21:42:39,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1729, Unknown=10, NotChecked=0, Total=2256 [2020-07-21 21:42:39,567 INFO L87 Difference]: Start difference. First operand 1182 states and 1611 transitions. Second operand 48 states. [2020-07-21 21:42:40,866 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 21:42:41,757 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-21 21:43:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:43:05,834 INFO L93 Difference]: Finished difference Result 2390 states and 3271 transitions. [2020-07-21 21:43:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 21:43:05,835 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-07-21 21:43:05,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:43:05,842 INFO L225 Difference]: With dead ends: 2390 [2020-07-21 21:43:05,843 INFO L226 Difference]: Without dead ends: 1218 [2020-07-21 21:43:05,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=746, Invalid=2210, Unknown=14, NotChecked=0, Total=2970 [2020-07-21 21:43:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2020-07-21 21:43:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1218. [2020-07-21 21:43:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2020-07-21 21:43:05,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1647 transitions. [2020-07-21 21:43:05,906 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1647 transitions. Word has length 104 [2020-07-21 21:43:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:43:05,907 INFO L479 AbstractCegarLoop]: Abstraction has 1218 states and 1647 transitions. [2020-07-21 21:43:05,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 21:43:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1647 transitions. [2020-07-21 21:43:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 21:43:05,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:43:05,909 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:43:06,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:43:06,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:43:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:43:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash -779930338, now seen corresponding path program 5 times [2020-07-21 21:43:06,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:43:06,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164938368] [2020-07-21 21:43:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in