/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 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 15:24:24,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:24:24,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:24:24,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:24:24,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:24:24,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:24:24,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:24:24,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:24:24,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:24:24,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:24:24,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:24:24,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:24:24,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:24:24,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:24:24,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:24:24,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:24:24,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:24:24,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:24:24,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:24:24,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:24:24,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:24:24,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:24:24,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:24:24,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:24:24,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 15:24:24,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 15:24:24,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 15:24:24,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 15:24:24,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 15:24:24,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 15:24:24,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 15:24:24,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 15:24:24,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 15:24:24,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 15:24:24,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 15:24:24,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 15:24:24,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 15:24:24,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 15:24:24,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:24:24,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:24:24,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:24:24,673 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 15:24:24,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:24:24,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:24:24,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:24:24,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:24:24,689 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:24:24,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:24:24,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:24:24,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:24:24,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:24:24,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:24:24,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:24:24,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:24:24,691 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:24:24,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:24:24,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:24:24,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:24:24,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:24:24,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:24:24,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:24:24,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:24:24,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:24:24,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:24:24,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:24:24,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:24:24,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:24:24,694 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:24:24,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-21 15:24:24,694 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 -> 2 [2020-07-21 15:24:25,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:24:25,033 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:24:25,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:24:25,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:24:25,042 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:24:25,043 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-07-21 15:24:25,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2adf093/04c51b65d53f4ae3b3f16cf93580390e/FLAG93bc2f509 [2020-07-21 15:24:26,002 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:24:26,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-07-21 15:24:26,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2adf093/04c51b65d53f4ae3b3f16cf93580390e/FLAG93bc2f509 [2020-07-21 15:24:26,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e2adf093/04c51b65d53f4ae3b3f16cf93580390e [2020-07-21 15:24:26,502 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:24:26,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:24:26,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:24:26,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:24:26,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:24:26,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:24:26" (1/1) ... [2020-07-21 15:24:26,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ef371f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:26, skipping insertion in model container [2020-07-21 15:24:26,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:24:26" (1/1) ... [2020-07-21 15:24:26,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:24:26,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:24:28,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:24:28,326 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:24:28,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:24:28,721 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:24:28,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28 WrapperNode [2020-07-21 15:24:28,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:24:28,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:24:28,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:24:28,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:24:28,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (1/1) ... [2020-07-21 15:24:28,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (1/1) ... [2020-07-21 15:24:28,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (1/1) ... [2020-07-21 15:24:28,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (1/1) ... [2020-07-21 15:24:28,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (1/1) ... [2020-07-21 15:24:28,931 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (1/1) ... [2020-07-21 15:24:28,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (1/1) ... [2020-07-21 15:24:28,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:24:28,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:24:28,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:24:28,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:24:28,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (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 15:24:29,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:24:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:24:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2020-07-21 15:24:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2020-07-21 15:24:29,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2020-07-21 15:24:29,071 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromio [2020-07-21 15:24:29,072 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2020-07-21 15:24:29,073 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2020-07-21 15:24:29,073 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2020-07-21 15:24:29,074 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-07-21 15:24:29,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-07-21 15:24:29,074 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-07-21 15:24:29,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 15:24:29,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-07-21 15:24:29,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-07-21 15:24:29,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2020-07-21 15:24:29,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2020-07-21 15:24:29,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-07-21 15:24:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-07-21 15:24:29,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-07-21 15:24:29,082 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2020-07-21 15:24:29,082 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2020-07-21 15:24:29,083 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_probe [2020-07-21 15:24:29,083 INFO L138 BoogieDeclarations]: Found implementation of procedure check_mirror [2020-07-21 15:24:29,083 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_found [2020-07-21 15:24:29,083 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_command [2020-07-21 15:24:29,084 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_status [2020-07-21 15:24:29,084 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_setmask [2020-07-21 15:24:29,084 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_reset [2020-07-21 15:24:29,085 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_to_card [2020-07-21 15:24:29,085 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_from_card [2020-07-21 15:24:29,086 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_init [2020-07-21 15:24:29,086 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_exit [2020-07-21 15:24:29,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2020-07-21 15:24:29,087 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2020-07-21 15:24:29,087 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2020-07-21 15:24:29,087 INFO L138 BoogieDeclarations]: Found implementation of procedure choose_interrupt_1 [2020-07-21 15:24:29,087 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2020-07-21 15:24:29,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:24:29,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq_5 [2020-07-21 15:24:29,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_6 [2020-07-21 15:24:29,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_7 [2020-07-21 15:24:29,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-07-21 15:24:29,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2020-07-21 15:24:29,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2020-07-21 15:24:29,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2020-07-21 15:24:29,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2020-07-21 15:24:29,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2020-07-21 15:24:29,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2020-07-21 15:24:29,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2020-07-21 15:24:29,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2020-07-21 15:24:29,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2020-07-21 15:24:29,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-07-21 15:24:29,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2020-07-21 15:24:29,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2020-07-21 15:24:29,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2020-07-21 15:24:29,092 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_arcdev [2020-07-21 15:24:29,093 INFO L138 BoogieDeclarations]: Found implementation of procedure arcnet_interrupt [2020-07-21 15:24:29,093 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2020-07-21 15:24:29,094 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2020-07-21 15:24:29,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2020-07-21 15:24:29,095 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2020-07-21 15:24:29,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-07-21 15:24:29,095 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2020-07-21 15:24:29,095 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_off [2020-07-21 15:24:29,096 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_on [2020-07-21 15:24:29,096 INFO L138 BoogieDeclarations]: Found implementation of procedure register_netdev [2020-07-21 15:24:29,096 INFO L138 BoogieDeclarations]: Found implementation of procedure request_threaded_irq [2020-07-21 15:24:29,097 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2020-07-21 15:24:29,097 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-07-21 15:24:29,097 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-07-21 15:24:29,098 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-21 15:24:29,098 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2020-07-21 15:24:29,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:24:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2020-07-21 15:24:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-21 15:24:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-07-21 15:24:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2020-07-21 15:24:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2020-07-21 15:24:29,101 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2020-07-21 15:24:29,102 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2020-07-21 15:24:29,102 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2020-07-21 15:24:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2020-07-21 15:24:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2020-07-21 15:24:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromio [2020-07-21 15:24:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2020-07-21 15:24:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2020-07-21 15:24:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2020-07-21 15:24:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2020-07-21 15:24:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-07-21 15:24:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-07-21 15:24:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-07-21 15:24:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-07-21 15:24:29,106 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-07-21 15:24:29,107 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-07-21 15:24:29,107 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 15:24:29,108 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 15:24:29,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:24:29,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-07-21 15:24:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 15:24:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 15:24:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 15:24:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-21 15:24:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2020-07-21 15:24:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2020-07-21 15:24:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-07-21 15:24:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-07-21 15:24:29,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-07-21 15:24:29,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-07-21 15:24:29,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2020-07-21 15:24:29,112 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2020-07-21 15:24:29,112 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2020-07-21 15:24:29,112 INFO L130 BoogieDeclarations]: Found specification of procedure choose_interrupt_1 [2020-07-21 15:24:29,112 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2020-07-21 15:24:29,113 INFO L130 BoogieDeclarations]: Found specification of procedure request_threaded_irq [2020-07-21 15:24:29,113 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2020-07-21 15:24:29,113 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq_5 [2020-07-21 15:24:29,114 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2020-07-21 15:24:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_6 [2020-07-21 15:24:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_7 [2020-07-21 15:24:29,115 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_on [2020-07-21 15:24:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_off [2020-07-21 15:24:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2020-07-21 15:24:29,116 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2020-07-21 15:24:29,117 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2020-07-21 15:24:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure register_netdev [2020-07-21 15:24:29,118 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2020-07-21 15:24:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure arcnet_interrupt [2020-07-21 15:24:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_arcdev [2020-07-21 15:24:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_found [2020-07-21 15:24:29,119 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_command [2020-07-21 15:24:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_status [2020-07-21 15:24:29,120 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_setmask [2020-07-21 15:24:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_reset [2020-07-21 15:24:29,121 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_to_card [2020-07-21 15:24:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_from_card [2020-07-21 15:24:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_probe [2020-07-21 15:24:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 15:24:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 15:24:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 15:24:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 15:24:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 15:24:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 15:24:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure check_mirror [2020-07-21 15:24:29,127 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_init [2020-07-21 15:24:29,134 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_exit [2020-07-21 15:24:29,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-07-21 15:24:29,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-07-21 15:24:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:24:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-07-21 15:24:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2020-07-21 15:24:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2020-07-21 15:24:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2020-07-21 15:24:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2020-07-21 15:24:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2020-07-21 15:24:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2020-07-21 15:24:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2020-07-21 15:24:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2020-07-21 15:24:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2020-07-21 15:24:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 15:24:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:24:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 15:24:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:24:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-07-21 15:24:29,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-07-21 15:24:29,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-07-21 15:24:29,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-07-21 15:24:30,133 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-07-21 15:24:30,139 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2020-07-21 15:24:34,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:24:34,061 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 15:24:34,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:24:34 BoogieIcfgContainer [2020-07-21 15:24:34,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:24:34,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:24:34,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:24:34,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:24:34,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:24:26" (1/3) ... [2020-07-21 15:24:34,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221e7c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:24:34, skipping insertion in model container [2020-07-21 15:24:34,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:24:28" (2/3) ... [2020-07-21 15:24:34,080 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221e7c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:24:34, skipping insertion in model container [2020-07-21 15:24:34,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:24:34" (3/3) ... [2020-07-21 15:24:34,082 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 15:24:34,095 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:24:34,106 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:24:34,125 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:24:34,160 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:24:34,160 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:24:34,160 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:24:34,161 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:24:34,161 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:24:34,161 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:24:34,161 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:24:34,161 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:24:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states. [2020-07-21 15:24:34,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 15:24:34,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:24:34,212 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 15:24:34,212 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:24:34,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:24:34,219 INFO L82 PathProgramCache]: Analyzing trace with hash 915174829, now seen corresponding path program 1 times [2020-07-21 15:24:34,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:24:34,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049031929] [2020-07-21 15:24:34,230 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 15:24:35,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:24:35,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:24:35,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 15:24:35,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:24:35,541 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 15:24:35,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:24:35,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049031929] [2020-07-21 15:24:35,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:24:35,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 15:24:35,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289402006] [2020-07-21 15:24:35,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 15:24:35,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:24:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 15:24:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 15:24:35,568 INFO L87 Difference]: Start difference. First operand 599 states. Second operand 3 states. [2020-07-21 15:24:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:24:35,779 INFO L93 Difference]: Finished difference Result 1133 states and 1613 transitions. [2020-07-21 15:24:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 15:24:35,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-07-21 15:24:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:24:35,803 INFO L225 Difference]: With dead ends: 1133 [2020-07-21 15:24:35,803 INFO L226 Difference]: Without dead ends: 590 [2020-07-21 15:24:35,815 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 15:24:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-07-21 15:24:35,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2020-07-21 15:24:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-21 15:24:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 814 transitions. [2020-07-21 15:24:35,946 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 814 transitions. Word has length 26 [2020-07-21 15:24:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:24:35,947 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 814 transitions. [2020-07-21 15:24:35,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 15:24:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 814 transitions. [2020-07-21 15:24:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 15:24:35,956 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:24:35,957 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 15:24:36,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:24:36,171 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:24:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:24:36,172 INFO L82 PathProgramCache]: Analyzing trace with hash 568046743, now seen corresponding path program 1 times [2020-07-21 15:24:36,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:24:36,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220529781] [2020-07-21 15:24:36,173 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 15:24:37,086 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:24:37,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:24:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 1546 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:24:37,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:24:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:24:37,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:24:37,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220529781] [2020-07-21 15:24:37,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:24:37,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 15:24:37,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782162069] [2020-07-21 15:24:37,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 15:24:37,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:24:37,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 15:24:37,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 15:24:37,115 INFO L87 Difference]: Start difference. First operand 590 states and 814 transitions. Second operand 3 states. [2020-07-21 15:24:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:24:37,156 INFO L93 Difference]: Finished difference Result 1170 states and 1620 transitions. [2020-07-21 15:24:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 15:24:37,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-07-21 15:24:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:24:37,163 INFO L225 Difference]: With dead ends: 1170 [2020-07-21 15:24:37,163 INFO L226 Difference]: Without dead ends: 590 [2020-07-21 15:24:37,167 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 15:24:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-07-21 15:24:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2020-07-21 15:24:37,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-07-21 15:24:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 813 transitions. [2020-07-21 15:24:37,210 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 813 transitions. Word has length 38 [2020-07-21 15:24:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:24:37,211 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 813 transitions. [2020-07-21 15:24:37,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 15:24:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 813 transitions. [2020-07-21 15:24:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 15:24:37,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:24:37,214 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 15:24:37,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:24:37,428 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:24:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:24:37,429 INFO L82 PathProgramCache]: Analyzing trace with hash -100070499, now seen corresponding path program 1 times [2020-07-21 15:24:37,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:24:37,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258037206] [2020-07-21 15:24:37,430 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 15:24:38,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:24:38,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:24:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:24:38,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:24:38,171 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 15:24:38,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:24:38,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258037206] [2020-07-21 15:24:38,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:24:38,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 15:24:38,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917591417] [2020-07-21 15:24:38,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 15:24:38,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:24:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 15:24:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 15:24:38,175 INFO L87 Difference]: Start difference. First operand 590 states and 813 transitions. Second operand 4 states. [2020-07-21 15:24:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:24:39,979 INFO L93 Difference]: Finished difference Result 1730 states and 2395 transitions. [2020-07-21 15:24:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 15:24:39,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-07-21 15:24:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:24:39,989 INFO L225 Difference]: With dead ends: 1730 [2020-07-21 15:24:39,989 INFO L226 Difference]: Without dead ends: 1150 [2020-07-21 15:24:39,992 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 15:24:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2020-07-21 15:24:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1094. [2020-07-21 15:24:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-07-21 15:24:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1525 transitions. [2020-07-21 15:24:40,084 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1525 transitions. Word has length 60 [2020-07-21 15:24:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:24:40,085 INFO L479 AbstractCegarLoop]: Abstraction has 1094 states and 1525 transitions. [2020-07-21 15:24:40,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 15:24:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1525 transitions. [2020-07-21 15:24:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 15:24:40,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:24:40,092 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 15:24:40,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:24:40,300 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:24:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:24:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash -494437285, now seen corresponding path program 1 times [2020-07-21 15:24:40,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:24:40,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867199816] [2020-07-21 15:24:40,306 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 15:24:41,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:24:41,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:24:41,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:24:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:24:41,068 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 15:24:41,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:24:41,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867199816] [2020-07-21 15:24:41,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:24:41,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 15:24:41,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370369505] [2020-07-21 15:24:41,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 15:24:41,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:24:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 15:24:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 15:24:41,071 INFO L87 Difference]: Start difference. First operand 1094 states and 1525 transitions. Second operand 3 states. [2020-07-21 15:24:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:24:41,139 INFO L93 Difference]: Finished difference Result 1104 states and 1533 transitions. [2020-07-21 15:24:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 15:24:41,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-07-21 15:24:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:24:41,148 INFO L225 Difference]: With dead ends: 1104 [2020-07-21 15:24:41,149 INFO L226 Difference]: Without dead ends: 1099 [2020-07-21 15:24:41,150 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 15:24:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2020-07-21 15:24:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1094. [2020-07-21 15:24:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2020-07-21 15:24:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1523 transitions. [2020-07-21 15:24:41,202 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1523 transitions. Word has length 60 [2020-07-21 15:24:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:24:41,203 INFO L479 AbstractCegarLoop]: Abstraction has 1094 states and 1523 transitions. [2020-07-21 15:24:41,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 15:24:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1523 transitions. [2020-07-21 15:24:41,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 15:24:41,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:24:41,232 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 15:24:41,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:24:41,440 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:24:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:24:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash -437178983, now seen corresponding path program 1 times [2020-07-21 15:24:41,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:24:41,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603286374] [2020-07-21 15:24:41,443 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 15:24:42,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:24:42,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:24:42,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:24:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:24:42,138 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 15:24:42,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:24:42,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603286374] [2020-07-21 15:24:42,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:24:42,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 15:24:42,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607048143] [2020-07-21 15:24:42,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 15:24:42,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:24:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 15:24:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 15:24:42,141 INFO L87 Difference]: Start difference. First operand 1094 states and 1523 transitions. Second operand 3 states. [2020-07-21 15:24:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:24:42,223 INFO L93 Difference]: Finished difference Result 2182 states and 3047 transitions. [2020-07-21 15:24:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 15:24:42,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 60 [2020-07-21 15:24:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:24:42,233 INFO L225 Difference]: With dead ends: 2182 [2020-07-21 15:24:42,234 INFO L226 Difference]: Without dead ends: 1098 [2020-07-21 15:24:42,239 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 15:24:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2020-07-21 15:24:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1098. [2020-07-21 15:24:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-07-21 15:24:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1527 transitions. [2020-07-21 15:24:42,299 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1527 transitions. Word has length 60 [2020-07-21 15:24:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:24:42,300 INFO L479 AbstractCegarLoop]: Abstraction has 1098 states and 1527 transitions. [2020-07-21 15:24:42,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 15:24:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1527 transitions. [2020-07-21 15:24:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 15:24:42,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:24:42,304 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 15:24:42,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:24:42,517 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:24:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:24:42,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1237303988, now seen corresponding path program 1 times [2020-07-21 15:24:42,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:24:42,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793522102] [2020-07-21 15:24:42,518 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 15:24:43,236 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:24:43,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:24:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 15:24:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:24:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:24:43,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:24:43,442 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 15:24:43,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793522102] [2020-07-21 15:24:43,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:24:43,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 15:24:43,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200713382] [2020-07-21 15:24:43,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 15:24:43,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:24:43,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 15:24:43,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 15:24:43,447 INFO L87 Difference]: Start difference. First operand 1098 states and 1527 transitions. Second operand 6 states. [2020-07-21 15:24:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:24:43,556 INFO L93 Difference]: Finished difference Result 2198 states and 3067 transitions. [2020-07-21 15:24:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:24:43,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-07-21 15:24:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:24:43,566 INFO L225 Difference]: With dead ends: 2198 [2020-07-21 15:24:43,566 INFO L226 Difference]: Without dead ends: 1110 [2020-07-21 15:24:43,571 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 15:24:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2020-07-21 15:24:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2020-07-21 15:24:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1110 states. [2020-07-21 15:24:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1539 transitions. [2020-07-21 15:24:43,626 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1539 transitions. Word has length 62 [2020-07-21 15:24:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:24:43,626 INFO L479 AbstractCegarLoop]: Abstraction has 1110 states and 1539 transitions. [2020-07-21 15:24:43,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 15:24:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1539 transitions. [2020-07-21 15:24:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:24:43,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:24:43,628 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 15:24:43,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:24:43,843 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:24:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:24:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1548296581, now seen corresponding path program 2 times [2020-07-21 15:24:43,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:24:43,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265306751] [2020-07-21 15:24:43,846 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 15:24:44,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:24:44,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:24:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 15:24:44,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:24:44,574 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 15:24:44,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:24:44,814 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 15:24:44,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265306751] [2020-07-21 15:24:44,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:24:44,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 15:24:44,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492237514] [2020-07-21 15:24:44,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 15:24:44,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:24:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 15:24:44,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-07-21 15:24:44,817 INFO L87 Difference]: Start difference. First operand 1110 states and 1539 transitions. Second operand 12 states. [2020-07-21 15:24:49,256 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2020-07-21 15:24:51,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:24:51,539 INFO L93 Difference]: Finished difference Result 2234 states and 3109 transitions. [2020-07-21 15:24:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 15:24:51,540 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-07-21 15:24:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:24:51,549 INFO L225 Difference]: With dead ends: 2234 [2020-07-21 15:24:51,549 INFO L226 Difference]: Without dead ends: 1134 [2020-07-21 15:24:51,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2020-07-21 15:24:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2020-07-21 15:24:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1134. [2020-07-21 15:24:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1134 states. [2020-07-21 15:24:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1563 transitions. [2020-07-21 15:24:51,617 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1563 transitions. Word has length 68 [2020-07-21 15:24:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:24:51,617 INFO L479 AbstractCegarLoop]: Abstraction has 1134 states and 1563 transitions. [2020-07-21 15:24:51,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 15:24:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1563 transitions. [2020-07-21 15:24:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 15:24:51,619 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:24:51,619 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 15:24:51,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:24:51,833 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:24:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:24:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1070658329, now seen corresponding path program 3 times [2020-07-21 15:24:51,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:24:51,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483638255] [2020-07-21 15:24:51,835 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 15:24:52,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:24:52,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:24:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1003 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 15:24:52,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:24:52,691 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 15:24:52,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:24:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 108 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 15:24:57,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483638255] [2020-07-21 15:24:57,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:24:57,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-21 15:24:57,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833119754] [2020-07-21 15:24:57,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 15:24:57,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:24:57,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 15:24:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=384, Unknown=2, NotChecked=0, Total=552 [2020-07-21 15:24:57,410 INFO L87 Difference]: Start difference. First operand 1134 states and 1563 transitions. Second operand 24 states. [2020-07-21 15:25:00,380 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-21 15:25:05,300 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-21 15:25:12,965 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-21 15:25:17,867 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-21 15:25:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:25:32,537 INFO L93 Difference]: Finished difference Result 2306 states and 3193 transitions. [2020-07-21 15:25:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 15:25:32,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 80 [2020-07-21 15:25:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:25:32,550 INFO L225 Difference]: With dead ends: 2306 [2020-07-21 15:25:32,551 INFO L226 Difference]: Without dead ends: 1182 [2020-07-21 15:25:32,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=405, Invalid=710, Unknown=7, NotChecked=0, Total=1122 [2020-07-21 15:25:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2020-07-21 15:25:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1182. [2020-07-21 15:25:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2020-07-21 15:25:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1611 transitions. [2020-07-21 15:25:32,631 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1611 transitions. Word has length 80 [2020-07-21 15:25:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:25:32,632 INFO L479 AbstractCegarLoop]: Abstraction has 1182 states and 1611 transitions. [2020-07-21 15:25:32,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 15:25:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1611 transitions. [2020-07-21 15:25:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-21 15:25:32,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:25:32,635 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 15:25:32,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:25:32,850 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:25:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:25:32,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1070029483, now seen corresponding path program 4 times [2020-07-21 15:25:32,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:25:32,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972810563] [2020-07-21 15:25:32,851 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 15:25:33,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:25:33,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:25:33,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 15:25:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:25:33,993 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 15:25:33,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:25:54,427 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 15:25:54,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972810563] [2020-07-21 15:25:54,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:25:54,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-21 15:25:54,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446217320] [2020-07-21 15:25:54,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-21 15:25:54,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:25:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-21 15:25:54,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1730, Unknown=9, NotChecked=0, Total=2256 [2020-07-21 15:25:54,431 INFO L87 Difference]: Start difference. First operand 1182 states and 1611 transitions. Second operand 48 states. [2020-07-21 15:26:00,695 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 31 DAG size of output: 11 [2020-07-21 15:26:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:26:06,757 INFO L93 Difference]: Finished difference Result 2390 states and 3271 transitions. [2020-07-21 15:26:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 15:26:06,758 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-07-21 15:26:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:26:06,769 INFO L225 Difference]: With dead ends: 2390 [2020-07-21 15:26:06,769 INFO L226 Difference]: Without dead ends: 1218 [2020-07-21 15:26:06,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=748, Invalid=2211, Unknown=11, NotChecked=0, Total=2970 [2020-07-21 15:26:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2020-07-21 15:26:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1218. [2020-07-21 15:26:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2020-07-21 15:26:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1647 transitions. [2020-07-21 15:26:06,841 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1647 transitions. Word has length 104 [2020-07-21 15:26:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:26:06,841 INFO L479 AbstractCegarLoop]: Abstraction has 1218 states and 1647 transitions. [2020-07-21 15:26:06,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-21 15:26:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1647 transitions. [2020-07-21 15:26:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 15:26:06,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:26:06,845 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 15:26:07,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:26:07,060 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:26:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:26:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash -779930338, now seen corresponding path program 5 times [2020-07-21 15:26:07,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:26:07,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499198130] [2020-07-21 15:26:07,065 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