/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 NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 [2020-07-20 16:06:59,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:06:59,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:06:59,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:06:59,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:06:59,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:06:59,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:06:59,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:06:59,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:06:59,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:06:59,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:06:59,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:06:59,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:06:59,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:06:59,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:06:59,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:06:59,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:06:59,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:06:59,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:06:59,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:06:59,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:06:59,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:06:59,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:06:59,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:06:59,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 16:06:59,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 16:06:59,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 16:06:59,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 16:06:59,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 16:06:59,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 16:06:59,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 16:06:59,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 16:06:59,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 16:06:59,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 16:06:59,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 16:06:59,416 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 16:06:59,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 16:06:59,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 16:06:59,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:06:59,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:06:59,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:06:59,419 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 [2020-07-20 16:06:59,433 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:06:59,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:06:59,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:06:59,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:06:59,435 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:06:59,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:06:59,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:06:59,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:06:59,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:06:59,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:06:59,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:06:59,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:06:59,437 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:06:59,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:06:59,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:06:59,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:06:59,438 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:06:59,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:06:59,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:06:59,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:06:59,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:06:59,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:06:59,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:06:59,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:06:59,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:06:59,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:06:59,440 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-20 16:06:59,440 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 -> NUM_FUNCTIONS 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 -> 4 [2020-07-20 16:06:59,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:06:59,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:06:59,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:06:59,734 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:06:59,734 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:06:59,735 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-07-20 16:06:59,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f28381d6/694a1ec7d15b483097f690be39e0b1c7/FLAG1a08e5fcf [2020-07-20 16:07:00,629 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:07:00,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-07-20 16:07:00,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f28381d6/694a1ec7d15b483097f690be39e0b1c7/FLAG1a08e5fcf [2020-07-20 16:07:01,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f28381d6/694a1ec7d15b483097f690be39e0b1c7 [2020-07-20 16:07:01,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:07:01,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:07:01,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:07:01,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:07:01,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:07:01,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:07:01" (1/1) ... [2020-07-20 16:07:01,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c4ac0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:01, skipping insertion in model container [2020-07-20 16:07:01,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:07:01" (1/1) ... [2020-07-20 16:07:01,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:07:01,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:07:02,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:07:02,782 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:07:03,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:07:03,131 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:07:03,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03 WrapperNode [2020-07-20 16:07:03,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:07:03,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:07:03,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:07:03,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:07:03,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (1/1) ... [2020-07-20 16:07:03,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (1/1) ... [2020-07-20 16:07:03,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (1/1) ... [2020-07-20 16:07:03,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (1/1) ... [2020-07-20 16:07:03,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (1/1) ... [2020-07-20 16:07:03,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (1/1) ... [2020-07-20 16:07:03,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (1/1) ... [2020-07-20 16:07:03,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:07:03,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:07:03,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:07:03,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:07:03,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (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 [2020-07-20 16:07:03,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:07:03,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:07:03,477 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2020-07-20 16:07:03,477 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2020-07-20 16:07:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2020-07-20 16:07:03,478 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromio [2020-07-20 16:07:03,479 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2020-07-20 16:07:03,480 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2020-07-20 16:07:03,480 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2020-07-20 16:07:03,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-07-20 16:07:03,481 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-07-20 16:07:03,481 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-07-20 16:07:03,484 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 16:07:03,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-07-20 16:07:03,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-07-20 16:07:03,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2020-07-20 16:07:03,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2020-07-20 16:07:03,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-07-20 16:07:03,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-07-20 16:07:03,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-07-20 16:07:03,490 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2020-07-20 16:07:03,491 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2020-07-20 16:07:03,491 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_probe [2020-07-20 16:07:03,491 INFO L138 BoogieDeclarations]: Found implementation of procedure check_mirror [2020-07-20 16:07:03,491 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_found [2020-07-20 16:07:03,491 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_command [2020-07-20 16:07:03,492 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_status [2020-07-20 16:07:03,492 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_setmask [2020-07-20 16:07:03,492 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_reset [2020-07-20 16:07:03,492 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_to_card [2020-07-20 16:07:03,492 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_from_card [2020-07-20 16:07:03,492 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_init [2020-07-20 16:07:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_exit [2020-07-20 16:07:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2020-07-20 16:07:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2020-07-20 16:07:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2020-07-20 16:07:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure choose_interrupt_1 [2020-07-20 16:07:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2020-07-20 16:07:03,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:07:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq_5 [2020-07-20 16:07:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_6 [2020-07-20 16:07:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_7 [2020-07-20 16:07:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-07-20 16:07:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2020-07-20 16:07:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2020-07-20 16:07:03,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2020-07-20 16:07:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2020-07-20 16:07:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2020-07-20 16:07:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2020-07-20 16:07:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2020-07-20 16:07:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2020-07-20 16:07:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2020-07-20 16:07:03,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-07-20 16:07:03,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2020-07-20 16:07:03,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2020-07-20 16:07:03,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2020-07-20 16:07:03,496 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_arcdev [2020-07-20 16:07:03,496 INFO L138 BoogieDeclarations]: Found implementation of procedure arcnet_interrupt [2020-07-20 16:07:03,497 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2020-07-20 16:07:03,497 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2020-07-20 16:07:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2020-07-20 16:07:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2020-07-20 16:07:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-07-20 16:07:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2020-07-20 16:07:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_off [2020-07-20 16:07:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_on [2020-07-20 16:07:03,498 INFO L138 BoogieDeclarations]: Found implementation of procedure register_netdev [2020-07-20 16:07:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure request_threaded_irq [2020-07-20 16:07:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2020-07-20 16:07:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-07-20 16:07:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-07-20 16:07:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-20 16:07:03,499 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2020-07-20 16:07:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:07:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2020-07-20 16:07:03,500 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-20 16:07:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-07-20 16:07:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2020-07-20 16:07:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2020-07-20 16:07:03,501 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2020-07-20 16:07:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2020-07-20 16:07:03,502 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2020-07-20 16:07:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2020-07-20 16:07:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2020-07-20 16:07:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromio [2020-07-20 16:07:03,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2020-07-20 16:07:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2020-07-20 16:07:03,504 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2020-07-20 16:07:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2020-07-20 16:07:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-07-20 16:07:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-07-20 16:07:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-07-20 16:07:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-07-20 16:07:03,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-07-20 16:07:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-07-20 16:07:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 16:07:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 16:07:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:07:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-07-20 16:07:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 16:07:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 16:07:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 16:07:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-20 16:07:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2020-07-20 16:07:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2020-07-20 16:07:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-07-20 16:07:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-07-20 16:07:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-07-20 16:07:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-07-20 16:07:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2020-07-20 16:07:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2020-07-20 16:07:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2020-07-20 16:07:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure choose_interrupt_1 [2020-07-20 16:07:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2020-07-20 16:07:03,510 INFO L130 BoogieDeclarations]: Found specification of procedure request_threaded_irq [2020-07-20 16:07:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2020-07-20 16:07:03,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq_5 [2020-07-20 16:07:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2020-07-20 16:07:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_6 [2020-07-20 16:07:03,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_7 [2020-07-20 16:07:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_on [2020-07-20 16:07:03,513 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_off [2020-07-20 16:07:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2020-07-20 16:07:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2020-07-20 16:07:03,514 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2020-07-20 16:07:03,515 INFO L130 BoogieDeclarations]: Found specification of procedure register_netdev [2020-07-20 16:07:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2020-07-20 16:07:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure arcnet_interrupt [2020-07-20 16:07:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_arcdev [2020-07-20 16:07:03,516 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_found [2020-07-20 16:07:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_command [2020-07-20 16:07:03,517 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_status [2020-07-20 16:07:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_setmask [2020-07-20 16:07:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_reset [2020-07-20 16:07:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_to_card [2020-07-20 16:07:03,528 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_from_card [2020-07-20 16:07:03,528 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_probe [2020-07-20 16:07:03,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 16:07:03,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 16:07:03,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 16:07:03,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 16:07:03,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 16:07:03,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 16:07:03,532 INFO L130 BoogieDeclarations]: Found specification of procedure check_mirror [2020-07-20 16:07:03,533 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_init [2020-07-20 16:07:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_exit [2020-07-20 16:07:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-07-20 16:07:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-07-20 16:07:03,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:07:03,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-07-20 16:07:03,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2020-07-20 16:07:03,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2020-07-20 16:07:03,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2020-07-20 16:07:03,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2020-07-20 16:07:03,543 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2020-07-20 16:07:03,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2020-07-20 16:07:03,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2020-07-20 16:07:03,545 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2020-07-20 16:07:03,546 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2020-07-20 16:07:03,546 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 16:07:03,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:07:03,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 16:07:03,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:07:03,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-07-20 16:07:03,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-07-20 16:07:03,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-07-20 16:07:03,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-07-20 16:07:04,414 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-07-20 16:07:04,420 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2020-07-20 16:07:08,038 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:07:08,038 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 16:07:08,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:07:08 BoogieIcfgContainer [2020-07-20 16:07:08,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:07:08,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:07:08,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:07:08,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:07:08,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:07:01" (1/3) ... [2020-07-20 16:07:08,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237c6abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:07:08, skipping insertion in model container [2020-07-20 16:07:08,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:07:03" (2/3) ... [2020-07-20 16:07:08,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237c6abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:07:08, skipping insertion in model container [2020-07-20 16:07:08,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:07:08" (3/3) ... [2020-07-20 16:07:08,061 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-07-20 16:07:08,071 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:07:08,083 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:07:08,097 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:07:08,133 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:07:08,133 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:07:08,133 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:07:08,133 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:07:08,133 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:07:08,133 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:07:08,134 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:07:08,134 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:07:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states. [2020-07-20 16:07:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 16:07:08,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:07:08,193 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] [2020-07-20 16:07:08,194 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:07:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:07:08,201 INFO L82 PathProgramCache]: Analyzing trace with hash 915174829, now seen corresponding path program 1 times [2020-07-20 16:07:08,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:07:08,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472012051] [2020-07-20 16:07:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 16:07:09,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 16:07:09,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:07:09,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 16:07:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:07:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:09,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:07:09,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472012051] [2020-07-20 16:07:09,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:07:09,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 16:07:09,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586764504] [2020-07-20 16:07:09,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 16:07:09,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:07:09,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 16:07:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 16:07:09,330 INFO L87 Difference]: Start difference. First operand 599 states. Second operand 3 states. [2020-07-20 16:07:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:07:09,499 INFO L93 Difference]: Finished difference Result 1133 states and 1613 transitions. [2020-07-20 16:07:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 16:07:09,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-20 16:07:09,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:07:09,536 INFO L225 Difference]: With dead ends: 1133 [2020-07-20 16:07:09,537 INFO L226 Difference]: Without dead ends: 590 [2020-07-20 16:07:09,555 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 [2020-07-20 16:07:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-07-20 16:07:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2020-07-20 16:07:09,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-20 16:07:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 814 transitions. [2020-07-20 16:07:09,696 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 814 transitions. Word has length 26 [2020-07-20 16:07:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:07:09,697 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 814 transitions. [2020-07-20 16:07:09,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 16:07:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 814 transitions. [2020-07-20 16:07:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 16:07:09,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:07:09,700 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] [2020-07-20 16:07:09,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:07:09,915 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:07:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:07:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash 568046743, now seen corresponding path program 1 times [2020-07-20 16:07:09,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:07:09,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577820663] [2020-07-20 16:07:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 16:07:10,858 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 16:07:10,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:07:10,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:07:10,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:07:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:10,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:07:10,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577820663] [2020-07-20 16:07:10,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:07:10,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 16:07:10,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874922547] [2020-07-20 16:07:10,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 16:07:10,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:07:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 16:07:10,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 16:07:10,891 INFO L87 Difference]: Start difference. First operand 590 states and 814 transitions. Second operand 3 states. [2020-07-20 16:07:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:07:10,929 INFO L93 Difference]: Finished difference Result 1170 states and 1620 transitions. [2020-07-20 16:07:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 16:07:10,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-20 16:07:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:07:10,934 INFO L225 Difference]: With dead ends: 1170 [2020-07-20 16:07:10,934 INFO L226 Difference]: Without dead ends: 590 [2020-07-20 16:07:10,937 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 [2020-07-20 16:07:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-07-20 16:07:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2020-07-20 16:07:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-20 16:07:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 813 transitions. [2020-07-20 16:07:10,974 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 813 transitions. Word has length 38 [2020-07-20 16:07:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:07:10,975 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 813 transitions. [2020-07-20 16:07:10,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 16:07:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 813 transitions. [2020-07-20 16:07:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-20 16:07:10,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:07:10,978 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] [2020-07-20 16:07:11,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:07:11,193 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:07:11,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:07:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash -100070499, now seen corresponding path program 1 times [2020-07-20 16:07:11,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:07:11,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535012521] [2020-07-20 16:07:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 16:07:12,961 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:07:12,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:07:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:07:12,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:07:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:13,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:07:13,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535012521] [2020-07-20 16:07:13,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:07:13,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 16:07:13,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577910968] [2020-07-20 16:07:13,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 16:07:13,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:07:13,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 16:07:13,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 16:07:13,029 INFO L87 Difference]: Start difference. First operand 590 states and 813 transitions. Second operand 4 states. [2020-07-20 16:07:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:07:14,925 INFO L93 Difference]: Finished difference Result 1730 states and 2395 transitions. [2020-07-20 16:07:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 16:07:14,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-20 16:07:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:07:14,937 INFO L225 Difference]: With dead ends: 1730 [2020-07-20 16:07:14,937 INFO L226 Difference]: Without dead ends: 1150 [2020-07-20 16:07:14,945 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 [2020-07-20 16:07:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2020-07-20 16:07:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1094. [2020-07-20 16:07:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-07-20 16:07:15,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1525 transitions. [2020-07-20 16:07:15,053 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1525 transitions. Word has length 60 [2020-07-20 16:07:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:07:15,055 INFO L479 AbstractCegarLoop]: Abstraction has 1094 states and 1525 transitions. [2020-07-20 16:07:15,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 16:07:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1525 transitions. [2020-07-20 16:07:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-20 16:07:15,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:07:15,068 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] [2020-07-20 16:07:15,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:07:15,269 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:07:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:07:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash -494437285, now seen corresponding path program 1 times [2020-07-20 16:07:15,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:07:15,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37822653] [2020-07-20 16:07:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 16:07:18,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:07:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:07:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:07:18,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:07:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:18,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:07:18,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37822653] [2020-07-20 16:07:18,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:07:18,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 16:07:18,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940144667] [2020-07-20 16:07:18,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 16:07:18,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:07:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 16:07:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 16:07:18,114 INFO L87 Difference]: Start difference. First operand 1094 states and 1525 transitions. Second operand 3 states. [2020-07-20 16:07:18,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:07:18,214 INFO L93 Difference]: Finished difference Result 1104 states and 1533 transitions. [2020-07-20 16:07:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 16:07:18,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-07-20 16:07:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:07:18,225 INFO L225 Difference]: With dead ends: 1104 [2020-07-20 16:07:18,226 INFO L226 Difference]: Without dead ends: 1099 [2020-07-20 16:07:18,232 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 [2020-07-20 16:07:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-07-20 16:07:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1094. [2020-07-20 16:07:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-07-20 16:07:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1523 transitions. [2020-07-20 16:07:18,296 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1523 transitions. Word has length 60 [2020-07-20 16:07:18,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:07:18,296 INFO L479 AbstractCegarLoop]: Abstraction has 1094 states and 1523 transitions. [2020-07-20 16:07:18,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 16:07:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1523 transitions. [2020-07-20 16:07:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-20 16:07:18,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:07:18,298 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] [2020-07-20 16:07:18,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:07:18,504 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:07:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:07:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash -437178983, now seen corresponding path program 1 times [2020-07-20 16:07:18,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:07:18,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790802826] [2020-07-20 16:07:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 16:07:21,299 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:07:21,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:07:21,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 16:07:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:07:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:21,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:07:21,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790802826] [2020-07-20 16:07:21,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:07:21,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 16:07:21,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584895359] [2020-07-20 16:07:21,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 16:07:21,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:07:21,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 16:07:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 16:07:21,364 INFO L87 Difference]: Start difference. First operand 1094 states and 1523 transitions. Second operand 3 states. [2020-07-20 16:07:21,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:07:21,461 INFO L93 Difference]: Finished difference Result 2182 states and 3047 transitions. [2020-07-20 16:07:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 16:07:21,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-07-20 16:07:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:07:21,470 INFO L225 Difference]: With dead ends: 2182 [2020-07-20 16:07:21,470 INFO L226 Difference]: Without dead ends: 1098 [2020-07-20 16:07:21,477 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 [2020-07-20 16:07:21,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2020-07-20 16:07:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1098. [2020-07-20 16:07:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-07-20 16:07:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1527 transitions. [2020-07-20 16:07:21,533 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1527 transitions. Word has length 60 [2020-07-20 16:07:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:07:21,533 INFO L479 AbstractCegarLoop]: Abstraction has 1098 states and 1527 transitions. [2020-07-20 16:07:21,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 16:07:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1527 transitions. [2020-07-20 16:07:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 16:07:21,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:07:21,538 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] [2020-07-20 16:07:21,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:07:21,753 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:07:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:07:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1237303988, now seen corresponding path program 1 times [2020-07-20 16:07:21,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:07:21,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630476308] [2020-07-20 16:07:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 16:07:23,236 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:07:23,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:07:23,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 16:07:23,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:07:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:23,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:07:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:23,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630476308] [2020-07-20 16:07:23,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:07:23,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 16:07:23,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741628555] [2020-07-20 16:07:23,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:07:23,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:07:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:07:23,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:07:23,439 INFO L87 Difference]: Start difference. First operand 1098 states and 1527 transitions. Second operand 6 states. [2020-07-20 16:07:25,551 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 16:07:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:07:25,624 INFO L93 Difference]: Finished difference Result 2198 states and 3067 transitions. [2020-07-20 16:07:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:07:25,625 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-07-20 16:07:25,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:07:25,632 INFO L225 Difference]: With dead ends: 2198 [2020-07-20 16:07:25,632 INFO L226 Difference]: Without dead ends: 1110 [2020-07-20 16:07:25,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:07:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2020-07-20 16:07:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2020-07-20 16:07:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1110 states. [2020-07-20 16:07:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1539 transitions. [2020-07-20 16:07:25,699 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1539 transitions. Word has length 62 [2020-07-20 16:07:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:07:25,699 INFO L479 AbstractCegarLoop]: Abstraction has 1110 states and 1539 transitions. [2020-07-20 16:07:25,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:07:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1539 transitions. [2020-07-20 16:07:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 16:07:25,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:07:25,701 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] [2020-07-20 16:07:25,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:07:25,915 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:07:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:07:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1548296581, now seen corresponding path program 2 times [2020-07-20 16:07:25,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:07:25,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143840537] [2020-07-20 16:07:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 16:07:30,283 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:07:30,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:07:30,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 16:07:30,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:07:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:30,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:07:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:30,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143840537] [2020-07-20 16:07:30,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:07:30,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 16:07:30,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298274994] [2020-07-20 16:07:30,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 16:07:30,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:07:30,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 16:07:30,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-07-20 16:07:30,586 INFO L87 Difference]: Start difference. First operand 1110 states and 1539 transitions. Second operand 12 states. [2020-07-20 16:07:34,453 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 16:07:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:07:36,081 INFO L93 Difference]: Finished difference Result 2234 states and 3109 transitions. [2020-07-20 16:07:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:07:36,082 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-07-20 16:07:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:07:36,090 INFO L225 Difference]: With dead ends: 2234 [2020-07-20 16:07:36,090 INFO L226 Difference]: Without dead ends: 1134 [2020-07-20 16:07:36,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2020-07-20 16:07:36,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2020-07-20 16:07:36,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2020-07-20 16:07:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1134 states. [2020-07-20 16:07:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1563 transitions. [2020-07-20 16:07:36,144 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1563 transitions. Word has length 68 [2020-07-20 16:07:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:07:36,144 INFO L479 AbstractCegarLoop]: Abstraction has 1134 states and 1563 transitions. [2020-07-20 16:07:36,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 16:07:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1563 transitions. [2020-07-20 16:07:36,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-20 16:07:36,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:07:36,146 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] [2020-07-20 16:07:36,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:07:36,361 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:07:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:07:36,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1070658329, now seen corresponding path program 3 times [2020-07-20 16:07:36,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:07:36,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657608523] [2020-07-20 16:07:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 16:07:45,886 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:07:45,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:07:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 16:07:45,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:07:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:46,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:07:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 104 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 16:07:55,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657608523] [2020-07-20 16:07:55,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:07:55,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-20 16:07:55,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079971347] [2020-07-20 16:07:55,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 16:07:55,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:07:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 16:07:55,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=382, Unknown=4, NotChecked=0, Total=552 [2020-07-20 16:07:55,021 INFO L87 Difference]: Start difference. First operand 1134 states and 1563 transitions. Second operand 24 states. [2020-07-20 16:07:55,617 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-20 16:07:56,809 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-20 16:08:01,544 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-20 16:08:09,438 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-20 16:08:19,517 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-20 16:08:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:08:36,585 INFO L93 Difference]: Finished difference Result 2306 states and 3193 transitions. [2020-07-20 16:08:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 16:08:36,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 80 [2020-07-20 16:08:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:08:36,598 INFO L225 Difference]: With dead ends: 2306 [2020-07-20 16:08:36,599 INFO L226 Difference]: Without dead ends: 1182 [2020-07-20 16:08:36,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 45.9s TimeCoverageRelationStatistics Valid=406, Invalid=708, Unknown=8, NotChecked=0, Total=1122 [2020-07-20 16:08:36,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2020-07-20 16:08:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2020-07-20 16:08:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2020-07-20 16:08:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1611 transitions. [2020-07-20 16:08:36,670 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1611 transitions. Word has length 80 [2020-07-20 16:08:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:08:36,670 INFO L479 AbstractCegarLoop]: Abstraction has 1182 states and 1611 transitions. [2020-07-20 16:08:36,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 16:08:36,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1611 transitions. [2020-07-20 16:08:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-20 16:08:36,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:08:36,673 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] [2020-07-20 16:08:36,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:08:36,888 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:08:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:08:36,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1070029483, now seen corresponding path program 4 times [2020-07-20 16:08:36,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:08:36,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668242118] [2020-07-20 16:08:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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