./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--unix--unix.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5f08f0f0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--unix--unix.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fe313da0c6b218ced50e4197dc755b81036d59e37c56d6141b10ae8e848ca9fd --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5f08f0f [2021-11-05 16:53:34,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-05 16:53:34,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-05 16:53:34,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-05 16:53:34,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-05 16:53:34,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-05 16:53:34,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-05 16:53:34,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-05 16:53:34,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-05 16:53:34,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-05 16:53:34,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-05 16:53:34,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-05 16:53:34,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-05 16:53:34,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-05 16:53:34,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-05 16:53:34,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-05 16:53:34,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-05 16:53:34,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-05 16:53:34,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-05 16:53:34,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-05 16:53:34,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-05 16:53:34,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-05 16:53:34,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-05 16:53:34,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-05 16:53:34,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-05 16:53:34,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-05 16:53:34,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-05 16:53:34,733 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-05 16:53:34,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-05 16:53:34,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-05 16:53:34,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-05 16:53:34,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-05 16:53:34,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-05 16:53:34,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-05 16:53:34,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-05 16:53:34,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-05 16:53:34,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-05 16:53:34,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-05 16:53:34,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-05 16:53:34,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-05 16:53:34,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-05 16:53:34,742 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-05 16:53:34,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-05 16:53:34,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-05 16:53:34,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-05 16:53:34,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-05 16:53:34,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-05 16:53:34,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-05 16:53:34,785 INFO L138 SettingsManager]: * Use SBE=true [2021-11-05 16:53:34,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-05 16:53:34,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-05 16:53:34,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-05 16:53:34,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-05 16:53:34,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-05 16:53:34,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-05 16:53:34,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-05 16:53:34,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-05 16:53:34,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-05 16:53:34,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-05 16:53:34,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-05 16:53:34,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-05 16:53:34,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:53:34,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-05 16:53:34,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-05 16:53:34,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-05 16:53:34,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-05 16:53:34,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-05 16:53:34,789 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-05 16:53:34,789 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-05 16:53:34,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-05 16:53:34,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-05 16:53:34,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe313da0c6b218ced50e4197dc755b81036d59e37c56d6141b10ae8e848ca9fd [2021-11-05 16:53:35,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-05 16:53:35,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-05 16:53:35,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-05 16:53:35,117 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-05 16:53:35,118 INFO L275 PluginConnector]: CDTParser initialized [2021-11-05 16:53:35,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--unix--unix.ko-entry_point.cil.out.i [2021-11-05 16:53:35,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93678e40/afbccd47c95843fdb57b3dd5fb9c92b0/FLAGd3f94e932 [2021-11-05 16:53:36,014 INFO L306 CDTParser]: Found 1 translation units. [2021-11-05 16:53:36,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--unix--unix.ko-entry_point.cil.out.i [2021-11-05 16:53:36,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93678e40/afbccd47c95843fdb57b3dd5fb9c92b0/FLAGd3f94e932 [2021-11-05 16:53:36,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d93678e40/afbccd47c95843fdb57b3dd5fb9c92b0 [2021-11-05 16:53:36,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-05 16:53:36,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-05 16:53:36,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-05 16:53:36,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-05 16:53:36,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-05 16:53:36,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:53:36" (1/1) ... [2021-11-05 16:53:36,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e8c2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:36, skipping insertion in model container [2021-11-05 16:53:36,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.11 04:53:36" (1/1) ... [2021-11-05 16:53:36,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-05 16:53:36,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-05 16:53:37,211 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [5693] [2021-11-05 16:53:37,212 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [5694-5695] [2021-11-05 16:53:37,647 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--unix--unix.ko-entry_point.cil.out.i[183417,183430] [2021-11-05 16:53:38,830 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-05 16:53:38,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:53:38,914 INFO L203 MainTranslator]: Completed pre-run [2021-11-05 16:53:39,015 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [5693] [2021-11-05 16:53:39,016 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [5694-5695] [2021-11-05 16:53:39,028 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--unix--unix.ko-entry_point.cil.out.i[183417,183430] [2021-11-05 16:53:39,472 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-05 16:53:39,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-05 16:53:39,643 INFO L208 MainTranslator]: Completed translation [2021-11-05 16:53:39,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39 WrapperNode [2021-11-05 16:53:39,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-05 16:53:39,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-05 16:53:39,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-05 16:53:39,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-05 16:53:39,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:39,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:41,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-05 16:53:41,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-05 16:53:41,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-05 16:53:41,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-05 16:53:41,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:41,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:41,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:41,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:42,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:42,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:42,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:43,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-05 16:53:43,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-05 16:53:43,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-05 16:53:43,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-05 16:53:43,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (1/1) ... [2021-11-05 16:53:43,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-05 16:53:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:53:43,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-05 16:53:43,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-05 16:53:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-05 16:53:43,155 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-05 16:53:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-05 16:53:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-05 16:53:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-05 16:53:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure unix_release_sock [2021-11-05 16:53:43,156 INFO L138 BoogieDeclarations]: Found implementation of procedure unix_release_sock [2021-11-05 16:53:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-05 16:53:43,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-05 16:53:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-05 16:53:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-05 16:53:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-05 16:53:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-05 16:53:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-05 16:53:43,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-05 16:53:43,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-05 16:53:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-05 16:53:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-05 16:53:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-05 16:53:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-05 16:53:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-05 16:53:43,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-05 16:54:06,543 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-05 16:54:06,544 INFO L299 CfgBuilder]: Removed 16976 assume(true) statements. [2021-11-05 16:54:06,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:54:06 BoogieIcfgContainer [2021-11-05 16:54:06,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-05 16:54:06,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-05 16:54:06,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-05 16:54:06,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-05 16:54:06,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.11 04:53:36" (1/3) ... [2021-11-05 16:54:06,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74db68c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:54:06, skipping insertion in model container [2021-11-05 16:54:06,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.11 04:53:39" (2/3) ... [2021-11-05 16:54:06,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74db68c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.11 04:54:06, skipping insertion in model container [2021-11-05 16:54:06,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.11 04:54:06" (3/3) ... [2021-11-05 16:54:06,561 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-net--unix--unix.ko-entry_point.cil.out.i [2021-11-05 16:54:06,565 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-05 16:54:06,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-05 16:54:06,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-05 16:54:06,641 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-05 16:54:06,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-05 16:54:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 12450 states, 12431 states have (on average 1.4146086396910948) internal successors, (17585), 12444 states have internal predecessors, (17585), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-05 16:54:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-05 16:54:06,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:54:06,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:54:06,828 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-05 16:54:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:54:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1034210886, now seen corresponding path program 1 times [2021-11-05 16:54:06,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:54:06,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682987149] [2021-11-05 16:54:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:06,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:54:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:54:07,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:54:07,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682987149] [2021-11-05 16:54:07,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682987149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:54:07,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:54:07,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:54:07,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136806052] [2021-11-05 16:54:07,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:54:07,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:54:07,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:54:07,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:54:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:07,552 INFO L87 Difference]: Start difference. First operand has 12450 states, 12431 states have (on average 1.4146086396910948) internal successors, (17585), 12444 states have internal predecessors, (17585), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:54:08,419 INFO L93 Difference]: Finished difference Result 33694 states and 47646 transitions. [2021-11-05 16:54:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:54:08,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-05 16:54:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:54:08,549 INFO L225 Difference]: With dead ends: 33694 [2021-11-05 16:54:08,549 INFO L226 Difference]: Without dead ends: 21094 [2021-11-05 16:54:08,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.54ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:08,620 INFO L933 BasicCegarLoop]: 17428 mSDtfsCounter, 12638 mSDsluCounter, 17087 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12638 SdHoareTripleChecker+Valid, 34515 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 79.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.04ms IncrementalHoareTripleChecker+Time [2021-11-05 16:54:08,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12638 Valid, 34515 Invalid, 56 Unknown, 0 Unchecked, 79.72ms Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 123.04ms Time] [2021-11-05 16:54:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21094 states. [2021-11-05 16:54:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21094 to 20931. [2021-11-05 16:54:09,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20931 states, 20907 states have (on average 1.4010618453149664) internal successors, (29292), 20921 states have internal predecessors, (29292), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-05 16:54:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20931 states to 20931 states and 29314 transitions. [2021-11-05 16:54:09,747 INFO L78 Accepts]: Start accepts. Automaton has 20931 states and 29314 transitions. Word has length 82 [2021-11-05 16:54:09,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:54:09,749 INFO L470 AbstractCegarLoop]: Abstraction has 20931 states and 29314 transitions. [2021-11-05 16:54:09,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 20931 states and 29314 transitions. [2021-11-05 16:54:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-05 16:54:09,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:54:09,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:54:09,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-05 16:54:09,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-05 16:54:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:54:09,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2021014327, now seen corresponding path program 1 times [2021-11-05 16:54:09,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:54:09,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174698771] [2021-11-05 16:54:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:09,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:54:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:54:09,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:54:09,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174698771] [2021-11-05 16:54:09,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174698771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:54:09,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:54:09,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:54:09,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656371551] [2021-11-05 16:54:09,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:54:09,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:54:09,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:54:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:54:09,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:09,970 INFO L87 Difference]: Start difference. First operand 20931 states and 29314 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:54:10,945 INFO L93 Difference]: Finished difference Result 55529 states and 77909 transitions. [2021-11-05 16:54:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:54:10,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-05 16:54:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:54:11,091 INFO L225 Difference]: With dead ends: 55529 [2021-11-05 16:54:11,092 INFO L226 Difference]: Without dead ends: 34853 [2021-11-05 16:54:11,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.71ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:11,285 INFO L933 BasicCegarLoop]: 21935 mSDtfsCounter, 12429 mSDsluCounter, 16917 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12429 SdHoareTripleChecker+Valid, 38852 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.24ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.46ms IncrementalHoareTripleChecker+Time [2021-11-05 16:54:11,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12429 Valid, 38852 Invalid, 56 Unknown, 0 Unchecked, 50.24ms Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 93.46ms Time] [2021-11-05 16:54:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34853 states. [2021-11-05 16:54:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34853 to 34782. [2021-11-05 16:54:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34782 states, 34749 states have (on average 1.4035224035224034) internal successors, (48771), 34765 states have internal predecessors, (48771), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-05 16:54:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34782 states to 34782 states and 48807 transitions. [2021-11-05 16:54:12,259 INFO L78 Accepts]: Start accepts. Automaton has 34782 states and 48807 transitions. Word has length 83 [2021-11-05 16:54:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:54:12,266 INFO L470 AbstractCegarLoop]: Abstraction has 34782 states and 48807 transitions. [2021-11-05 16:54:12,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:12,267 INFO L276 IsEmpty]: Start isEmpty. Operand 34782 states and 48807 transitions. [2021-11-05 16:54:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-05 16:54:12,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:54:12,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:54:12,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-05 16:54:12,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-05 16:54:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:54:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1164295681, now seen corresponding path program 1 times [2021-11-05 16:54:12,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:54:12,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795045472] [2021-11-05 16:54:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:12,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:54:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:54:12,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:54:12,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795045472] [2021-11-05 16:54:12,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795045472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:54:12,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:54:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:54:12,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077644174] [2021-11-05 16:54:12,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:54:12,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:54:12,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:54:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:54:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:12,489 INFO L87 Difference]: Start difference. First operand 34782 states and 48807 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:54:13,688 INFO L93 Difference]: Finished difference Result 87943 states and 123567 transitions. [2021-11-05 16:54:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:54:13,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-05 16:54:13,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:54:13,899 INFO L225 Difference]: With dead ends: 87943 [2021-11-05 16:54:13,899 INFO L226 Difference]: Without dead ends: 53416 [2021-11-05 16:54:13,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.37ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:13,990 INFO L933 BasicCegarLoop]: 28605 mSDtfsCounter, 12002 mSDsluCounter, 16917 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12002 SdHoareTripleChecker+Valid, 45522 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.81ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.26ms IncrementalHoareTripleChecker+Time [2021-11-05 16:54:13,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12002 Valid, 45522 Invalid, 56 Unknown, 0 Unchecked, 43.81ms Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 88.26ms Time] [2021-11-05 16:54:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53416 states. [2021-11-05 16:54:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53416 to 53402. [2021-11-05 16:54:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53402 states, 53357 states have (on average 1.4052139363157599) internal successors, (74978), 53375 states have internal predecessors, (74978), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-05 16:54:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53402 states to 53402 states and 75032 transitions. [2021-11-05 16:54:15,734 INFO L78 Accepts]: Start accepts. Automaton has 53402 states and 75032 transitions. Word has length 89 [2021-11-05 16:54:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:54:15,737 INFO L470 AbstractCegarLoop]: Abstraction has 53402 states and 75032 transitions. [2021-11-05 16:54:15,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 53402 states and 75032 transitions. [2021-11-05 16:54:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-05 16:54:15,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:54:15,754 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:54:15,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-05 16:54:15,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-05 16:54:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:54:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1334107731, now seen corresponding path program 1 times [2021-11-05 16:54:15,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:54:15,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641422080] [2021-11-05 16:54:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:15,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:54:15,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:54:16,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:54:16,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641422080] [2021-11-05 16:54:16,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641422080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:54:16,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:54:16,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-05 16:54:16,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686887013] [2021-11-05 16:54:16,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:54:16,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:54:16,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:54:16,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:54:16,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:16,084 INFO L87 Difference]: Start difference. First operand 53402 states and 75032 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:54:17,828 INFO L93 Difference]: Finished difference Result 82828 states and 117761 transitions. [2021-11-05 16:54:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:54:17,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-05 16:54:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:54:18,290 INFO L225 Difference]: With dead ends: 82828 [2021-11-05 16:54:18,291 INFO L226 Difference]: Without dead ends: 82806 [2021-11-05 16:54:18,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.79ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:18,325 INFO L933 BasicCegarLoop]: 23292 mSDtfsCounter, 13880 mSDsluCounter, 12115 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 407.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13880 SdHoareTripleChecker+Valid, 35407 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.15ms SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 505.08ms IncrementalHoareTripleChecker+Time [2021-11-05 16:54:18,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13880 Valid, 35407 Invalid, 464 Unknown, 0 Unchecked, 33.15ms Time], IncrementalHoareTripleChecker [213 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 505.08ms Time] [2021-11-05 16:54:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82806 states. [2021-11-05 16:54:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82806 to 63005. [2021-11-05 16:54:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63005 states, 62960 states have (on average 1.4061467598475221) internal successors, (88531), 62978 states have internal predecessors, (88531), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-05 16:54:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63005 states to 63005 states and 88585 transitions. [2021-11-05 16:54:20,166 INFO L78 Accepts]: Start accepts. Automaton has 63005 states and 88585 transitions. Word has length 149 [2021-11-05 16:54:20,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:54:20,168 INFO L470 AbstractCegarLoop]: Abstraction has 63005 states and 88585 transitions. [2021-11-05 16:54:20,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 63005 states and 88585 transitions. [2021-11-05 16:54:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-05 16:54:20,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:54:20,197 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:54:20,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-05 16:54:20,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-05 16:54:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:54:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1674999198, now seen corresponding path program 1 times [2021-11-05 16:54:20,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:54:20,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119194421] [2021-11-05 16:54:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:20,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:54:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-05 16:54:20,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:54:20,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119194421] [2021-11-05 16:54:20,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119194421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:54:20,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-05 16:54:20,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-05 16:54:20,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173051932] [2021-11-05 16:54:20,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:54:20,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-05 16:54:20,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:54:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-05 16:54:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:20,409 INFO L87 Difference]: Start difference. First operand 63005 states and 88585 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:22,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:54:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:54:24,925 INFO L93 Difference]: Finished difference Result 188497 states and 265173 transitions. [2021-11-05 16:54:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-05 16:54:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-05 16:54:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:54:25,371 INFO L225 Difference]: With dead ends: 188497 [2021-11-05 16:54:25,372 INFO L226 Difference]: Without dead ends: 125747 [2021-11-05 16:54:25,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.64ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-05 16:54:25,517 INFO L933 BasicCegarLoop]: 34198 mSDtfsCounter, 16967 mSDsluCounter, 17248 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2036.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16967 SdHoareTripleChecker+Valid, 51446 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 226.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2089.43ms IncrementalHoareTripleChecker+Time [2021-11-05 16:54:25,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16967 Valid, 51446 Invalid, 7 Unknown, 0 Unchecked, 226.51ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2089.43ms Time] [2021-11-05 16:54:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125747 states. [2021-11-05 16:54:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125747 to 63013. [2021-11-05 16:54:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63013 states, 62968 states have (on average 1.4060951594460678) internal successors, (88539), 62986 states have internal predecessors, (88539), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-05 16:54:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63013 states to 63013 states and 88593 transitions. [2021-11-05 16:54:27,932 INFO L78 Accepts]: Start accepts. Automaton has 63013 states and 88593 transitions. Word has length 165 [2021-11-05 16:54:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:54:27,933 INFO L470 AbstractCegarLoop]: Abstraction has 63013 states and 88593 transitions. [2021-11-05 16:54:27,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 63013 states and 88593 transitions. [2021-11-05 16:54:27,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-05 16:54:27,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:54:27,961 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:54:27,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-05 16:54:27,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-05 16:54:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:54:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1540985692, now seen corresponding path program 1 times [2021-11-05 16:54:27,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:54:27,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857185825] [2021-11-05 16:54:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:27,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:54:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:54:28,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:54:28,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857185825] [2021-11-05 16:54:28,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857185825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:54:28,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736744138] [2021-11-05 16:54:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:28,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:54:28,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:54:28,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:54:28,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-05 16:54:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:29,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 3275 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-05 16:54:29,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:54:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-05 16:54:30,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-05 16:54:30,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736744138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-05 16:54:30,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-05 16:54:30,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-11-05 16:54:30,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728228437] [2021-11-05 16:54:30,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-05 16:54:30,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-05 16:54:30,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:54:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-05 16:54:30,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-11-05 16:54:30,150 INFO L87 Difference]: Start difference. First operand 63013 states and 88593 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:32,182 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:54:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-05 16:54:33,939 INFO L93 Difference]: Finished difference Result 125837 states and 176985 transitions. [2021-11-05 16:54:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-05 16:54:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-11-05 16:54:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-05 16:54:34,080 INFO L225 Difference]: With dead ends: 125837 [2021-11-05 16:54:34,080 INFO L226 Difference]: Without dead ends: 62999 [2021-11-05 16:54:34,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.59ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-05 16:54:34,167 INFO L933 BasicCegarLoop]: 17251 mSDtfsCounter, 6 mSDsluCounter, 51748 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2042.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68999 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.60ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2120.79ms IncrementalHoareTripleChecker+Time [2021-11-05 16:54:34,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 68999 Invalid, 18 Unknown, 0 Unchecked, 41.60ms Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 2120.79ms Time] [2021-11-05 16:54:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62999 states. [2021-11-05 16:54:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62999 to 62901. [2021-11-05 16:54:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62901 states, 62856 states have (on average 1.4063096601756395) internal successors, (88395), 62874 states have internal predecessors, (88395), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-05 16:54:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62901 states to 62901 states and 88449 transitions. [2021-11-05 16:54:35,962 INFO L78 Accepts]: Start accepts. Automaton has 62901 states and 88449 transitions. Word has length 165 [2021-11-05 16:54:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-05 16:54:35,962 INFO L470 AbstractCegarLoop]: Abstraction has 62901 states and 88449 transitions. [2021-11-05 16:54:35,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 62901 states and 88449 transitions. [2021-11-05 16:54:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-05 16:54:35,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-05 16:54:35,985 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-05 16:54:36,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-05 16:54:36,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-05 16:54:36,197 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-05 16:54:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-05 16:54:36,197 INFO L85 PathProgramCache]: Analyzing trace with hash -402126144, now seen corresponding path program 1 times [2021-11-05 16:54:36,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-05 16:54:36,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504150058] [2021-11-05 16:54:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:36,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-05 16:54:36,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:54:36,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-05 16:54:36,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504150058] [2021-11-05 16:54:36,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504150058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-05 16:54:36,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086087406] [2021-11-05 16:54:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-05 16:54:36,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-05 16:54:36,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-05 16:54:36,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-05 16:54:36,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-05 16:54:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-05 16:54:42,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 3300 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-05 16:54:42,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-05 16:54:44,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-05 16:54:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:54:44,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-05 16:54:44,211 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-05 16:54:44,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-05 16:54:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-05 16:54:45,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086087406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-05 16:54:45,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-05 16:54:45,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 20 [2021-11-05 16:54:45,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568810979] [2021-11-05 16:54:45,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-05 16:54:45,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-05 16:54:45,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-05 16:54:45,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-05 16:54:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-05 16:54:45,037 INFO L87 Difference]: Start difference. First operand 62901 states and 88449 transitions. Second operand has 21 states, 21 states have (on average 10.666666666666666) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-05 16:54:47,071 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:54:49,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:54:51,190 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:54:53,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-05 16:54:55,302 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []