/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/ntdrivers/kbfiltr.i.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:11:21,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:11:21,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:11:21,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 04:11:21,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 04:11:21,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 04:11:21,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 04:11:21,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 04:11:21,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 04:11:21,681 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 04:11:21,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 04:11:21,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 04:11:21,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 04:11:21,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 04:11:21,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 04:11:21,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 04:11:21,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 04:11:21,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 04:11:21,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 04:11:21,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 04:11:21,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 04:11:21,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 04:11:21,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 04:11:21,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 04:11:21,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 04:11:21,708 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 04:11:21,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 04:11:21,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 04:11:21,710 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 04:11:21,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-01-10 04:11:21,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:11:21,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:11:21,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:11:21,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 04:11:21,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:11:21,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:11:21,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:11:21,746 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:11:21,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:11:21,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:11:21,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:11:21,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:11:21,748 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:11:21,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:11:21,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:11:21,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:11:21,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:11:21,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:11:21,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:11:21,749 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:11:21,749 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:11:21,749 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:11:21,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:11:21,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:11:21,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:11:21,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:11:21,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:11:21,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:11:21,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:11:21,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:11:21,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:11:21,750 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:11:21,750 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:11:21,750 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:11:21,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:11:21,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:11:21,751 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:11:21,751 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:11:21,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:11:21,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:11:21,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:11:21,964 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:11:21,966 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:11:21,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ntdrivers/kbfiltr.i.cil-2.c [2022-01-10 04:11:22,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676eb0a69/1863775f2d9a4b6fa9f99e42c098be90/FLAG10f734a1e [2022-01-10 04:11:22,652 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:11:22,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers/kbfiltr.i.cil-2.c [2022-01-10 04:11:22,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676eb0a69/1863775f2d9a4b6fa9f99e42c098be90/FLAG10f734a1e [2022-01-10 04:11:23,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/676eb0a69/1863775f2d9a4b6fa9f99e42c098be90 [2022-01-10 04:11:23,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:11:23,024 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:11:23,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:11:23,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:11:23,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:11:23,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:11:23" (1/1) ... [2022-01-10 04:11:23,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2213128a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:23, skipping insertion in model container [2022-01-10 04:11:23,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:11:23" (1/1) ... [2022-01-10 04:11:23,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:11:23,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:11:23,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers/kbfiltr.i.cil-2.c[62209,62222] [2022-01-10 04:11:23,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:11:23,812 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 04:11:23,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:11:23,886 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers/kbfiltr.i.cil-2.c[62209,62222] [2022-01-10 04:11:23,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:11:23,998 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:11:24,040 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ntdrivers/kbfiltr.i.cil-2.c[62209,62222] [2022-01-10 04:11:24,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:11:24,159 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:11:24,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24 WrapperNode [2022-01-10 04:11:24,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:11:24,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:11:24,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:11:24,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:11:24,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,263 INFO L137 Inliner]: procedures = 117, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1052 [2022-01-10 04:11:24,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:11:24,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:11:24,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:11:24,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:11:24,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:11:24,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:11:24,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:11:24,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:11:24,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (1/1) ... [2022-01-10 04:11:24,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:11:24,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:11:24,421 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) [2022-01-10 04:11:24,447 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 [2022-01-10 04:11:24,461 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2022-01-10 04:11:24,461 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2022-01-10 04:11:24,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-01-10 04:11:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-01-10 04:11:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 04:11:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-01-10 04:11:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-01-10 04:11:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-01-10 04:11:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-01-10 04:11:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-01-10 04:11:24,462 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-01-10 04:11:24,462 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-01-10 04:11:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-01-10 04:11:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-01-10 04:11:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-01-10 04:11:24,463 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-01-10 04:11:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 04:11:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:11:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 04:11:24,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-01-10 04:11:24,464 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2022-01-10 04:11:24,464 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 04:11:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:11:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-01-10 04:11:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:11:24,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:11:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2022-01-10 04:11:24,465 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2022-01-10 04:11:24,801 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:11:24,804 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:11:25,045 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 04:11:25,074 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-01-10 04:11:25,075 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-01-10 04:11:25,077 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 04:11:25,079 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 04:11:25,081 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 04:11:25,084 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 04:11:25,086 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 04:11:25,089 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 04:11:25,090 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-01-10 04:11:35,581 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume false; [2022-01-10 04:11:35,581 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume !false; [2022-01-10 04:11:35,581 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##36: assume !false; [2022-01-10 04:11:35,581 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume false; [2022-01-10 04:11:35,581 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##157: assume !false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##156: assume false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##114: assume !false; [2022-01-10 04:11:35,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##113: assume false; [2022-01-10 04:11:35,652 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:11:35,665 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:11:35,666 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 04:11:35,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:11:35 BoogieIcfgContainer [2022-01-10 04:11:35,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:11:35,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:11:35,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:11:35,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:11:35,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:11:23" (1/3) ... [2022-01-10 04:11:35,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258f6065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:11:35, skipping insertion in model container [2022-01-10 04:11:35,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:24" (2/3) ... [2022-01-10 04:11:35,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258f6065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:11:35, skipping insertion in model container [2022-01-10 04:11:35,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:11:35" (3/3) ... [2022-01-10 04:11:35,676 INFO L111 eAbstractionObserver]: Analyzing ICFG kbfiltr.i.cil-2.c [2022-01-10 04:11:35,680 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:11:35,680 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:11:35,720 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:11:35,726 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 [2022-01-10 04:11:35,726 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:11:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 239 states, 201 states have (on average 1.572139303482587) internal successors, (316), 219 states have internal predecessors, (316), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-01-10 04:11:35,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 04:11:35,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:35,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:35,749 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:35,753 INFO L85 PathProgramCache]: Analyzing trace with hash -660511916, now seen corresponding path program 1 times [2022-01-10 04:11:35,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:35,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074571103] [2022-01-10 04:11:35,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:35,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:35,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:11:35,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 04:11:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:36,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 04:11:36,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:11:36,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:36,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:36,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074571103] [2022-01-10 04:11:36,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074571103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:36,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:36,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 04:11:36,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875520064] [2022-01-10 04:11:36,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:36,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 04:11:36,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:36,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 04:11:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:11:36,546 INFO L87 Difference]: Start difference. First operand has 239 states, 201 states have (on average 1.572139303482587) internal successors, (316), 219 states have internal predecessors, (316), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:36,641 INFO L93 Difference]: Finished difference Result 472 states and 755 transitions. [2022-01-10 04:11:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 04:11:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 04:11:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:36,668 INFO L225 Difference]: With dead ends: 472 [2022-01-10 04:11:36,668 INFO L226 Difference]: Without dead ends: 231 [2022-01-10 04:11:36,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 04:11:36,676 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:36,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-10 04:11:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-01-10 04:11:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.5128205128205128) internal successors, (295), 211 states have internal predecessors, (295), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 04:11:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 339 transitions. [2022-01-10 04:11:36,761 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 339 transitions. Word has length 16 [2022-01-10 04:11:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:36,762 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 339 transitions. [2022-01-10 04:11:36,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 339 transitions. [2022-01-10 04:11:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 04:11:36,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:36,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:36,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 04:11:36,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:11:36,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1247317930, now seen corresponding path program 1 times [2022-01-10 04:11:36,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:36,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018426627] [2022-01-10 04:11:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:36,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:36,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:36,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:11:36,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 04:11:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:37,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:11:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:11:37,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:37,774 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:37,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018426627] [2022-01-10 04:11:37,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018426627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:37,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:37,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 04:11:37,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476264125] [2022-01-10 04:11:37,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:37,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:11:37,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:37,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:11:37,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:11:37,777 INFO L87 Difference]: Start difference. First operand 231 states and 339 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:39,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:11:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:40,137 INFO L93 Difference]: Finished difference Result 248 states and 360 transitions. [2022-01-10 04:11:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 04:11:40,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 04:11:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:40,140 INFO L225 Difference]: With dead ends: 248 [2022-01-10 04:11:40,140 INFO L226 Difference]: Without dead ends: 231 [2022-01-10 04:11:40,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 04:11:40,142 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 249 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:40,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 737 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 04:11:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-10 04:11:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-01-10 04:11:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.5076923076923077) internal successors, (294), 211 states have internal predecessors, (294), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 04:11:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 338 transitions. [2022-01-10 04:11:40,169 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 338 transitions. Word has length 16 [2022-01-10 04:11:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:40,169 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 338 transitions. [2022-01-10 04:11:40,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 338 transitions. [2022-01-10 04:11:40,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 04:11:40,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:40,172 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] [2022-01-10 04:11:40,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 04:11:40,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:11:40,395 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1034619550, now seen corresponding path program 1 times [2022-01-10 04:11:40,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:40,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928214779] [2022-01-10 04:11:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:40,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:40,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:40,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:11:40,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 04:11:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:41,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:11:41,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:11:41,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:41,518 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:41,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928214779] [2022-01-10 04:11:41,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928214779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:41,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:41,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 04:11:41,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869065629] [2022-01-10 04:11:41,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:41,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:11:41,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:41,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:11:41,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:11:41,521 INFO L87 Difference]: Start difference. First operand 231 states and 338 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:43,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:11:43,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:43,705 INFO L93 Difference]: Finished difference Result 450 states and 662 transitions. [2022-01-10 04:11:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 04:11:43,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 04:11:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:43,729 INFO L225 Difference]: With dead ends: 450 [2022-01-10 04:11:43,729 INFO L226 Difference]: Without dead ends: 239 [2022-01-10 04:11:43,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 04:11:43,731 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 20 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:43,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 997 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 04:11:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-10 04:11:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2022-01-10 04:11:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 197 states have (on average 1.50253807106599) internal successors, (296), 213 states have internal predecessors, (296), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 04:11:43,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 340 transitions. [2022-01-10 04:11:43,745 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 340 transitions. Word has length 28 [2022-01-10 04:11:43,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:43,746 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 340 transitions. [2022-01-10 04:11:43,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:43,746 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 340 transitions. [2022-01-10 04:11:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 04:11:43,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:43,753 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] [2022-01-10 04:11:43,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 04:11:43,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:11:43,970 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1646498398, now seen corresponding path program 1 times [2022-01-10 04:11:43,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:43,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075183373] [2022-01-10 04:11:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:43,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:43,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:43,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:11:43,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 04:11:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:44,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 04:11:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:11:45,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:45,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:45,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075183373] [2022-01-10 04:11:45,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075183373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:45,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:45,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 04:11:45,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345233777] [2022-01-10 04:11:45,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:45,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 04:11:45,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 04:11:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 04:11:45,184 INFO L87 Difference]: Start difference. First operand 233 states and 340 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:47,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:11:49,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:11:51,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:11:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:51,870 INFO L93 Difference]: Finished difference Result 453 states and 664 transitions. [2022-01-10 04:11:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 04:11:51,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 04:11:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:51,872 INFO L225 Difference]: With dead ends: 453 [2022-01-10 04:11:51,872 INFO L226 Difference]: Without dead ends: 230 [2022-01-10 04:11:51,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-10 04:11:51,874 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 9 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:51,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1659 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time] [2022-01-10 04:11:51,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-10 04:11:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-01-10 04:11:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 194 states have (on average 1.5) internal successors, (291), 210 states have internal predecessors, (291), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 04:11:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 335 transitions. [2022-01-10 04:11:51,888 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 335 transitions. Word has length 28 [2022-01-10 04:11:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:51,888 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 335 transitions. [2022-01-10 04:11:51,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 335 transitions. [2022-01-10 04:11:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 04:11:51,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:51,889 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] [2022-01-10 04:11:51,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 04:11:52,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:11:52,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash 806678510, now seen corresponding path program 1 times [2022-01-10 04:11:52,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:52,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341972655] [2022-01-10 04:11:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:52,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:52,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:52,131 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:11:52,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 04:11:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:11:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:11:53,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:53,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341972655] [2022-01-10 04:11:53,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341972655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:53,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:53,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:53,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404389134] [2022-01-10 04:11:53,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:53,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:53,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:53,747 INFO L87 Difference]: Start difference. First operand 230 states and 335 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:53,803 INFO L93 Difference]: Finished difference Result 447 states and 656 transitions. [2022-01-10 04:11:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-10 04:11:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:53,807 INFO L225 Difference]: With dead ends: 447 [2022-01-10 04:11:53,807 INFO L226 Difference]: Without dead ends: 231 [2022-01-10 04:11:53,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:53,809 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 0 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:53,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 666 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-10 04:11:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-01-10 04:11:53,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.4974358974358974) internal successors, (292), 211 states have internal predecessors, (292), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 04:11:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 336 transitions. [2022-01-10 04:11:53,828 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 336 transitions. Word has length 33 [2022-01-10 04:11:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:53,828 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 336 transitions. [2022-01-10 04:11:53,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:53,828 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 336 transitions. [2022-01-10 04:11:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 04:11:53,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:53,829 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] [2022-01-10 04:11:53,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 04:11:54,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:11:54,036 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash -130899567, now seen corresponding path program 1 times [2022-01-10 04:11:54,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:54,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515010838] [2022-01-10 04:11:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:54,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:54,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:54,038 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:11:54,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 04:11:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 04:11:55,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:11:55,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:11:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:11:56,249 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:56,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515010838] [2022-01-10 04:11:56,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515010838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:11:56,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:11:56,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 04:11:56,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287741535] [2022-01-10 04:11:56,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:11:56,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 04:11:56,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:56,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 04:11:56,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 04:11:56,252 INFO L87 Difference]: Start difference. First operand 231 states and 336 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:56,556 INFO L93 Difference]: Finished difference Result 450 states and 661 transitions. [2022-01-10 04:11:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 04:11:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-10 04:11:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:56,562 INFO L225 Difference]: With dead ends: 450 [2022-01-10 04:11:56,562 INFO L226 Difference]: Without dead ends: 234 [2022-01-10 04:11:56,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 04:11:56,564 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 0 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:56,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1330 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 04:11:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-10 04:11:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-01-10 04:11:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 198 states have (on average 1.4898989898989898) internal successors, (295), 214 states have internal predecessors, (295), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 04:11:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 339 transitions. [2022-01-10 04:11:56,574 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 339 transitions. Word has length 34 [2022-01-10 04:11:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:56,574 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 339 transitions. [2022-01-10 04:11:56,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 339 transitions. [2022-01-10 04:11:56,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 04:11:56,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:56,575 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:56,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 04:11:56,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:11:56,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:56,777 INFO L85 PathProgramCache]: Analyzing trace with hash 583385262, now seen corresponding path program 2 times [2022-01-10 04:11:56,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:56,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952398758] [2022-01-10 04:11:56,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:11:56,778 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:56,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:56,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:11:56,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 04:11:58,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 04:11:58,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:11:58,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 04:11:58,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 04:11:59,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:59,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:59,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952398758] [2022-01-10 04:11:59,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952398758] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:59,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:59,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 04:11:59,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237498840] [2022-01-10 04:11:59,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:59,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 04:11:59,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 04:11:59,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:11:59,226 INFO L87 Difference]: Start difference. First operand 234 states and 339 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:12:01,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:12:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:12:02,363 INFO L93 Difference]: Finished difference Result 355 states and 505 transitions. [2022-01-10 04:12:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 04:12:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 04:12:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:12:02,366 INFO L225 Difference]: With dead ends: 355 [2022-01-10 04:12:02,366 INFO L226 Difference]: Without dead ends: 300 [2022-01-10 04:12:02,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 04:12:02,367 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 563 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:12:02,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 428 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 117 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-01-10 04:12:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-10 04:12:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 284. [2022-01-10 04:12:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 247 states have (on average 1.4210526315789473) internal successors, (351), 250 states have internal predecessors, (351), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 18 states have call successors, (27) [2022-01-10 04:12:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 404 transitions. [2022-01-10 04:12:02,382 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 404 transitions. Word has length 37 [2022-01-10 04:12:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:12:02,382 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 404 transitions. [2022-01-10 04:12:02,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:12:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 404 transitions. [2022-01-10 04:12:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-10 04:12:02,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:12:02,383 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:12:02,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 04:12:02,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:12:02,607 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:12:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:12:02,608 INFO L85 PathProgramCache]: Analyzing trace with hash 98716961, now seen corresponding path program 1 times [2022-01-10 04:12:02,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:12:02,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883738693] [2022-01-10 04:12:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:12:02,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:12:02,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:12:02,611 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:12:02,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 04:12:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:12:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1874 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 04:12:04,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:12:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:12:04,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:12:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 04:12:06,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:12:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883738693] [2022-01-10 04:12:06,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883738693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:12:06,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:12:06,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 04:12:06,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182650254] [2022-01-10 04:12:06,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:12:06,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 04:12:06,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:12:06,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 04:12:06,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 04:12:06,320 INFO L87 Difference]: Start difference. First operand 284 states and 404 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:12:08,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:12:08,185 INFO L93 Difference]: Finished difference Result 556 states and 800 transitions. [2022-01-10 04:12:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 04:12:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-10 04:12:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:12:08,191 INFO L225 Difference]: With dead ends: 556 [2022-01-10 04:12:08,191 INFO L226 Difference]: Without dead ends: 290 [2022-01-10 04:12:08,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 04:12:08,193 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 0 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 04:12:08,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2242 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 04:12:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-10 04:12:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-01-10 04:12:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 253 states have (on average 1.4110671936758894) internal successors, (357), 256 states have internal predecessors, (357), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 18 states have call successors, (27) [2022-01-10 04:12:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 410 transitions. [2022-01-10 04:12:08,208 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 410 transitions. Word has length 39 [2022-01-10 04:12:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:12:08,208 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 410 transitions. [2022-01-10 04:12:08,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:12:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 410 transitions. [2022-01-10 04:12:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 04:12:08,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:12:08,211 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:12:08,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 04:12:08,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:12:08,414 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:12:08,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:12:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1817458111, now seen corresponding path program 2 times [2022-01-10 04:12:08,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:12:08,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539915081] [2022-01-10 04:12:08,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:12:08,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:12:08,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:12:08,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:12:08,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 04:12:09,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 04:12:09,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:12:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:12:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:12:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-10 04:12:10,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:12:10,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:12:10,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539915081] [2022-01-10 04:12:10,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539915081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:12:10,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:12:10,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:12:10,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237627738] [2022-01-10 04:12:10,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:12:10,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:12:10,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:12:10,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:12:10,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:12:10,196 INFO L87 Difference]: Start difference. First operand 290 states and 410 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:12:12,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 04:12:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:12:12,274 INFO L93 Difference]: Finished difference Result 389 states and 545 transitions. [2022-01-10 04:12:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:12:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-10 04:12:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:12:12,277 INFO L225 Difference]: With dead ends: 389 [2022-01-10 04:12:12,277 INFO L226 Difference]: Without dead ends: 291 [2022-01-10 04:12:12,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:12:12,278 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 0 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 04:12:12,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 640 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 04:12:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-10 04:12:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-01-10 04:12:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 254 states have (on average 1.4094488188976377) internal successors, (358), 257 states have internal predecessors, (358), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 18 states have call successors, (27) [2022-01-10 04:12:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 411 transitions. [2022-01-10 04:12:12,291 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 411 transitions. Word has length 45 [2022-01-10 04:12:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:12:12,291 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 411 transitions. [2022-01-10 04:12:12,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:12:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 411 transitions. [2022-01-10 04:12:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 04:12:12,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:12:12,292 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:12:12,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-01-10 04:12:12,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:12:12,500 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:12:12,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:12:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash -790623670, now seen corresponding path program 1 times [2022-01-10 04:12:12,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:12:12,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161104415] [2022-01-10 04:12:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:12:12,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:12:12,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:12:12,503 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:12:12,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 04:12:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:12:14,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 04:12:14,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:12:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 04:12:16,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 04:12:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 04:12:20,325 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:12:20,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161104415] [2022-01-10 04:12:20,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161104415] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 04:12:20,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 04:12:20,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 04:12:20,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789051782] [2022-01-10 04:12:20,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 04:12:20,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 04:12:20,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:12:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 04:12:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 04:12:20,327 INFO L87 Difference]: Start difference. First operand 291 states and 411 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:12:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:12:30,024 INFO L93 Difference]: Finished difference Result 570 states and 820 transitions. [2022-01-10 04:12:30,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 04:12:30,026 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-01-10 04:12:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:12:30,028 INFO L225 Difference]: With dead ends: 570 [2022-01-10 04:12:30,028 INFO L226 Difference]: Without dead ends: 303 [2022-01-10 04:12:30,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 04:12:30,030 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 0 mSDsluCounter, 3840 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4162 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 04:12:30,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 4162 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 04:12:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-10 04:12:30,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-01-10 04:12:30,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 266 states have (on average 1.3909774436090225) internal successors, (370), 269 states have internal predecessors, (370), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 18 states have call successors, (27) [2022-01-10 04:12:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 423 transitions. [2022-01-10 04:12:30,047 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 423 transitions. Word has length 46 [2022-01-10 04:12:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:12:30,048 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 423 transitions. [2022-01-10 04:12:30,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:12:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 423 transitions. [2022-01-10 04:12:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-10 04:12:30,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:12:30,049 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:12:30,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 04:12:30,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 04:12:30,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:12:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:12:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 906518538, now seen corresponding path program 2 times [2022-01-10 04:12:30,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:12:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054618809] [2022-01-10 04:12:30,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 04:12:30,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:12:30,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:12:30,270 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 04:12:30,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 04:12:31,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 04:12:31,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 04:12:32,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 04:12:32,060 INFO L286 TraceCheckSpWp]: Computing forward predicates...