/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 12:50:07,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 12:50:07,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 12:50:07,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 12:50:07,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 12:50:07,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 12:50:07,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 12:50:07,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 12:50:07,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 12:50:07,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 12:50:07,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 12:50:07,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 12:50:07,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 12:50:07,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 12:50:07,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 12:50:07,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 12:50:07,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 12:50:07,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 12:50:07,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 12:50:07,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 12:50:07,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 12:50:07,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 12:50:07,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 12:50:07,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 12:50:07,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 12:50:07,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 12:50:07,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 12:50:07,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 12:50:07,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 12:50:07,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 12:50:07,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 12:50:07,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 12:50:07,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 12:50:07,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 12:50:07,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 12:50:07,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 12:50:07,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 12:50:07,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 12:50:07,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 12:50:07,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 12:50:07,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 12:50:07,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 12:50:07,746 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 12:50:07,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 12:50:07,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 12:50:07,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 12:50:07,749 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 12:50:07,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 12:50:07,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 12:50:07,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 12:50:07,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 12:50:07,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 12:50:07,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 12:50:07,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 12:50:07,750 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 12:50:07,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 12:50:07,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 12:50:07,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 12:50:07,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 12:50:07,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 12:50:07,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 12:50:07,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 12:50:07,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 12:50:07,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 12:50:07,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 12:50:07,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 12:50:07,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 12:50:07,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 12:50:08,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 12:50:08,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 12:50:08,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 12:50:08,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 12:50:08,149 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 12:50:08,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i [2020-12-22 12:50:08,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed1c86cf1/2ad2e044a2924cc1a29e0fb8daeeeacb/FLAGbd0259fa0 [2020-12-22 12:50:09,494 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 12:50:09,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i [2020-12-22 12:50:09,548 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed1c86cf1/2ad2e044a2924cc1a29e0fb8daeeeacb/FLAGbd0259fa0 [2020-12-22 12:50:09,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed1c86cf1/2ad2e044a2924cc1a29e0fb8daeeeacb [2020-12-22 12:50:09,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 12:50:09,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 12:50:09,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 12:50:09,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 12:50:09,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 12:50:09,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:50:09" (1/1) ... [2020-12-22 12:50:09,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1efa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:09, skipping insertion in model container [2020-12-22 12:50:09,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:50:09" (1/1) ... [2020-12-22 12:50:09,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 12:50:09,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 12:50:12,620 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i[265597,265610] [2020-12-22 12:50:12,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 12:50:12,884 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 12:50:13,494 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i[265597,265610] [2020-12-22 12:50:13,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 12:50:14,402 INFO L208 MainTranslator]: Completed translation [2020-12-22 12:50:14,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14 WrapperNode [2020-12-22 12:50:14,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 12:50:14,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 12:50:14,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 12:50:14,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 12:50:14,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:14,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:17,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 12:50:17,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 12:50:17,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 12:50:17,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 12:50:17,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:17,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:19,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:19,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:21,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:21,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:22,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (1/1) ... [2020-12-22 12:50:23,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 12:50:23,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 12:50:23,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 12:50:23,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 12:50:23,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (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 [2020-12-22 12:50:23,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 12:50:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 12:50:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure free_smi_msg_list [2020-12-22 12:50:23,162 INFO L138 BoogieDeclarations]: Found implementation of procedure free_smi_msg_list [2020-12-22 12:50:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 12:50:23,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 12:50:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2020-12-22 12:50:23,163 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2020-12-22 12:50:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 12:50:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 12:50:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2020-12-22 12:50:23,163 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 12:50:23,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 12:50:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure intf_free [2020-12-22 12:50:23,164 INFO L138 BoogieDeclarations]: Found implementation of procedure intf_free [2020-12-22 12:50:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 12:50:23,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 12:50:23,164 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2020-12-22 12:50:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2020-12-22 12:50:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2020-12-22 12:50:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 12:50:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 12:50:23,165 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_free_smi_msg [2020-12-22 12:50:23,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_free_smi_msg [2020-12-22 12:50:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 12:50:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 12:50:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 12:50:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure clean_up_interface_data [2020-12-22 12:50:23,166 INFO L138 BoogieDeclarations]: Found implementation of procedure clean_up_interface_data [2020-12-22 12:50:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 12:50:23,166 INFO L130 BoogieDeclarations]: Found specification of procedure free_recv_msg_list [2020-12-22 12:50:23,167 INFO L138 BoogieDeclarations]: Found implementation of procedure free_recv_msg_list [2020-12-22 12:50:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 12:50:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure ipmi_free_recv_msg [2020-12-22 12:50:23,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ipmi_free_recv_msg [2020-12-22 12:50:23,167 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-12-22 12:53:43,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 12:53:43,397 INFO L299 CfgBuilder]: Removed 11838 assume(true) statements. [2020-12-22 12:53:43,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:53:43 BoogieIcfgContainer [2020-12-22 12:53:43,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 12:53:43,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 12:53:43,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 12:53:43,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 12:53:43,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:50:09" (1/3) ... [2020-12-22 12:53:43,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2619bdd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:53:43, skipping insertion in model container [2020-12-22 12:53:43,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:50:14" (2/3) ... [2020-12-22 12:53:43,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2619bdd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:53:43, skipping insertion in model container [2020-12-22 12:53:43,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:53:43" (3/3) ... [2020-12-22 12:53:43,422 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--char--ipmi--ipmi_msghandler.ko-main.cil.out.i [2020-12-22 12:53:43,430 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 12:53:43,440 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-22 12:53:43,462 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-22 12:53:43,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 12:53:43,539 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 12:53:43,540 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 12:53:43,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 12:53:43,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 12:53:43,540 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 12:53:43,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 12:53:43,540 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 12:53:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14304 states. [2020-12-22 12:53:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 12:53:43,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:53:43,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 12:53:43,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, clean_up_interface_dataErr1ASSERT_VIOLATIONERROR_FUNCTION, clean_up_interface_dataErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:53:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:53:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash 840024965, now seen corresponding path program 1 times [2020-12-22 12:53:43,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:53:43,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068303088] [2020-12-22 12:53:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:53:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:53:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 12:53:44,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068303088] [2020-12-22 12:53:44,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:53:44,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 12:53:44,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866121256] [2020-12-22 12:53:44,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 12:53:44,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:53:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 12:53:44,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:53:44,592 INFO L87 Difference]: Start difference. First operand 14304 states. Second operand 3 states. [2020-12-22 12:53:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:53:48,191 INFO L93 Difference]: Finished difference Result 42849 states and 63684 transitions. [2020-12-22 12:53:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 12:53:48,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 12:53:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:53:48,422 INFO L225 Difference]: With dead ends: 42849 [2020-12-22 12:53:48,427 INFO L226 Difference]: Without dead ends: 28544 [2020-12-22 12:53:48,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:53:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28544 states. [2020-12-22 12:53:49,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28544 to 28540. [2020-12-22 12:53:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28540 states. [2020-12-22 12:53:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28540 states to 28540 states and 41981 transitions. [2020-12-22 12:53:50,054 INFO L78 Accepts]: Start accepts. Automaton has 28540 states and 41981 transitions. Word has length 14 [2020-12-22 12:53:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:53:50,055 INFO L481 AbstractCegarLoop]: Abstraction has 28540 states and 41981 transitions. [2020-12-22 12:53:50,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 12:53:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 28540 states and 41981 transitions. [2020-12-22 12:53:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 12:53:50,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:53:50,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 12:53:50,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 12:53:50,061 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, clean_up_interface_dataErr1ASSERT_VIOLATIONERROR_FUNCTION, clean_up_interface_dataErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:53:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:53:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1940844664, now seen corresponding path program 1 times [2020-12-22 12:53:50,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:53:50,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609641158] [2020-12-22 12:53:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:53:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:53:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 12:53:50,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609641158] [2020-12-22 12:53:50,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:53:50,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 12:53:50,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944376455] [2020-12-22 12:53:50,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 12:53:50,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:53:50,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 12:53:50,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:53:50,369 INFO L87 Difference]: Start difference. First operand 28540 states and 41981 transitions. Second operand 3 states. [2020-12-22 12:53:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:53:52,055 INFO L93 Difference]: Finished difference Result 85591 states and 125909 transitions. [2020-12-22 12:53:52,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 12:53:52,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-22 12:53:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:53:52,291 INFO L225 Difference]: With dead ends: 85591 [2020-12-22 12:53:52,291 INFO L226 Difference]: Without dead ends: 57054 [2020-12-22 12:53:52,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:53:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57054 states. [2020-12-22 12:53:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57054 to 57026. [2020-12-22 12:53:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57026 states. [2020-12-22 12:53:54,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57026 states to 57026 states and 83904 transitions. [2020-12-22 12:53:54,473 INFO L78 Accepts]: Start accepts. Automaton has 57026 states and 83904 transitions. Word has length 17 [2020-12-22 12:53:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:53:54,474 INFO L481 AbstractCegarLoop]: Abstraction has 57026 states and 83904 transitions. [2020-12-22 12:53:54,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 12:53:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 57026 states and 83904 transitions. [2020-12-22 12:53:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 12:53:54,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:53:54,486 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 12:53:54,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 12:53:54,491 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, clean_up_interface_dataErr1ASSERT_VIOLATIONERROR_FUNCTION, clean_up_interface_dataErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:53:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:53:54,492 INFO L82 PathProgramCache]: Analyzing trace with hash -545448925, now seen corresponding path program 1 times [2020-12-22 12:53:54,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:53:54,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224129552] [2020-12-22 12:53:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:53:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:53:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 12:53:54,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224129552] [2020-12-22 12:53:54,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:53:54,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 12:53:54,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839252987] [2020-12-22 12:53:54,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 12:53:54,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:53:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 12:53:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 12:53:55,000 INFO L87 Difference]: Start difference. First operand 57026 states and 83904 transitions. Second operand 4 states. [2020-12-22 12:53:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 12:53:59,279 INFO L93 Difference]: Finished difference Result 99809 states and 146849 transitions. [2020-12-22 12:53:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 12:53:59,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-22 12:53:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 12:53:59,538 INFO L225 Difference]: With dead ends: 99809 [2020-12-22 12:53:59,539 INFO L226 Difference]: Without dead ends: 42786 [2020-12-22 12:53:59,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 12:53:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42786 states. [2020-12-22 12:54:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42786 to 42786. [2020-12-22 12:54:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42786 states. [2020-12-22 12:54:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42786 states to 42786 states and 62944 transitions. [2020-12-22 12:54:01,395 INFO L78 Accepts]: Start accepts. Automaton has 42786 states and 62944 transitions. Word has length 19 [2020-12-22 12:54:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 12:54:01,395 INFO L481 AbstractCegarLoop]: Abstraction has 42786 states and 62944 transitions. [2020-12-22 12:54:01,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 12:54:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42786 states and 62944 transitions. [2020-12-22 12:54:01,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 12:54:01,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 12:54:01,400 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 12:54:01,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 12:54:01,400 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, clean_up_interface_dataErr1ASSERT_VIOLATIONERROR_FUNCTION, clean_up_interface_dataErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 12:54:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 12:54:01,401 INFO L82 PathProgramCache]: Analyzing trace with hash 578835819, now seen corresponding path program 1 times [2020-12-22 12:54:01,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 12:54:01,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646539008] [2020-12-22 12:54:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 12:54:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 12:54:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 12:54:01,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646539008] [2020-12-22 12:54:01,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 12:54:01,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 12:54:01,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489466150] [2020-12-22 12:54:01,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 12:54:01,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 12:54:01,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 12:54:01,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 12:54:01,840 INFO L87 Difference]: Start difference. First operand 42786 states and 62944 transitions. Second operand 3 states.