/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/list-properties/list_search-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 05:19:00,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 05:19:00,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 05:19:00,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 05:19:00,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 05:19:00,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 05:19:00,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 05:19:00,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 05:19:00,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 05:19:00,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 05:19:00,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 05:19:00,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 05:19:00,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 05:19:00,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 05:19:00,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 05:19:00,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 05:19:00,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 05:19:00,334 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 05:19:00,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 05:19:00,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 05:19:00,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 05:19:00,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 05:19:00,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 05:19:00,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 05:19:00,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 05:19:00,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 05:19:00,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 05:19:00,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 05:19:00,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 05:19:00,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 05:19:00,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 05:19:00,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 05:19:00,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 05:19:00,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 05:19:00,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 05:19:00,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 05:19:00,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 05:19:00,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 05:19:00,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 05:19:00,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 05:19:00,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 05:19:00,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 05:19:00,386 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 05:19:00,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 05:19:00,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 05:19:00,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 05:19:00,388 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 05:19:00,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 05:19:00,388 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 05:19:00,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 05:19:00,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 05:19:00,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 05:19:00,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 05:19:00,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 05:19:00,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 05:19:00,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 05:19:00,389 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 05:19:00,389 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 05:19:00,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 05:19:00,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 05:19:00,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 05:19:00,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 05:19:00,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 05:19:00,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:19:00,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 05:19:00,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 05:19:00,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 05:19:00,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 05:19:00,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 05:19:00,391 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 05:19:00,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 05:19:00,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 05:19:00,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 05:19:00,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 05:19:00,392 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 05:19:00,392 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 05:19:00,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 05:19:00,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 05:19:00,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 05:19:00,611 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 05:19:00,611 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 05:19:00,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-2.i [2022-01-11 05:19:00,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abb40d3d/71339be20ae74ebca1445e3fe5ed7a7f/FLAG8bc83c3d3 [2022-01-11 05:19:01,106 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 05:19:01,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i [2022-01-11 05:19:01,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abb40d3d/71339be20ae74ebca1445e3fe5ed7a7f/FLAG8bc83c3d3 [2022-01-11 05:19:01,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5abb40d3d/71339be20ae74ebca1445e3fe5ed7a7f [2022-01-11 05:19:01,476 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 05:19:01,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 05:19:01,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 05:19:01,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 05:19:01,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 05:19:01,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:01,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28738163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01, skipping insertion in model container [2022-01-11 05:19:01,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:01,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 05:19:01,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:19:01,684 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i[813,826] [2022-01-11 05:19:01,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:19:01,843 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-11 05:19:01,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 05:19:01,850 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i[813,826] [2022-01-11 05:19:01,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:19:01,876 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 05:19:01,888 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i[813,826] [2022-01-11 05:19:01,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 05:19:01,963 INFO L208 MainTranslator]: Completed translation [2022-01-11 05:19:01,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01 WrapperNode [2022-01-11 05:19:01,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 05:19:01,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 05:19:01,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 05:19:01,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 05:19:01,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:01,998 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,020 INFO L137 Inliner]: procedures = 229, calls = 29, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 149 [2022-01-11 05:19:02,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 05:19:02,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 05:19:02,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 05:19:02,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 05:19:02,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 05:19:02,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 05:19:02,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 05:19:02,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 05:19:02,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (1/1) ... [2022-01-11 05:19:02,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 05:19:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:19:02,094 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) [2022-01-11 05:19:02,099 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 [2022-01-11 05:19:02,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 05:19:02,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-11 05:19:02,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 05:19:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 05:19:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 05:19:02,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-11 05:19:02,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 05:19:02,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-11 05:19:02,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 05:19:02,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 05:19:02,195 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 05:19:02,196 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 05:19:02,584 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 05:19:02,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 05:19:02,589 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-11 05:19:02,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:19:02 BoogieIcfgContainer [2022-01-11 05:19:02,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 05:19:02,591 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 05:19:02,591 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 05:19:02,592 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 05:19:02,594 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:19:02" (1/1) ... [2022-01-11 05:19:02,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:19:02 BasicIcfg [2022-01-11 05:19:02,688 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 05:19:02,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 05:19:02,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 05:19:02,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 05:19:02,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 05:19:01" (1/4) ... [2022-01-11 05:19:02,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a180d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:19:02, skipping insertion in model container [2022-01-11 05:19:02,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 05:19:01" (2/4) ... [2022-01-11 05:19:02,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a180d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 05:19:02, skipping insertion in model container [2022-01-11 05:19:02,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 05:19:02" (3/4) ... [2022-01-11 05:19:02,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a180d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 05:19:02, skipping insertion in model container [2022-01-11 05:19:02,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 05:19:02" (4/4) ... [2022-01-11 05:19:02,693 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-2.iTransformedIcfg [2022-01-11 05:19:02,697 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 05:19:02,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 05:19:02,733 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 05:19:02,737 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 [2022-01-11 05:19:02,737 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 05:19:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-11 05:19:02,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:02,750 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] [2022-01-11 05:19:02,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1722702889, now seen corresponding path program 1 times [2022-01-11 05:19:02,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:02,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232598977] [2022-01-11 05:19:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:02,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:03,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232598977] [2022-01-11 05:19:03,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232598977] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:19:03,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:19:03,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 05:19:03,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496252186] [2022-01-11 05:19:03,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:19:03,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 05:19:03,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 05:19:03,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 05:19:03,065 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:03,238 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2022-01-11 05:19:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 05:19:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-11 05:19:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:03,250 INFO L225 Difference]: With dead ends: 71 [2022-01-11 05:19:03,250 INFO L226 Difference]: Without dead ends: 24 [2022-01-11 05:19:03,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:19:03,263 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:03,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 41 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 05:19:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-11 05:19:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-11 05:19:03,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-11 05:19:03,295 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2022-01-11 05:19:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:03,295 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-11 05:19:03,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,296 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-11 05:19:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 05:19:03,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:03,297 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] [2022-01-11 05:19:03,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 05:19:03,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:03,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1704052781, now seen corresponding path program 1 times [2022-01-11 05:19:03,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:03,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395890000] [2022-01-11 05:19:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:03,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:03,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:03,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395890000] [2022-01-11 05:19:03,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395890000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:19:03,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:19:03,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 05:19:03,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558009037] [2022-01-11 05:19:03,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:19:03,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 05:19:03,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 05:19:03,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 05:19:03,507 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:03,747 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-01-11 05:19:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 05:19:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-11 05:19:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:03,748 INFO L225 Difference]: With dead ends: 34 [2022-01-11 05:19:03,748 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 05:19:03,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-11 05:19:03,749 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:03,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 05:19:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 05:19:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 05:19:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-11 05:19:03,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2022-01-11 05:19:03,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:03,755 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-11 05:19:03,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:03,755 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-11 05:19:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 05:19:03,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:03,756 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] [2022-01-11 05:19:03,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 05:19:03,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:03,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:03,757 INFO L85 PathProgramCache]: Analyzing trace with hash -638489484, now seen corresponding path program 1 times [2022-01-11 05:19:03,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:03,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246900786] [2022-01-11 05:19:03,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:03,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:19:04,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:04,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246900786] [2022-01-11 05:19:04,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246900786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:19:04,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:19:04,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-11 05:19:04,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485488652] [2022-01-11 05:19:04,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:19:04,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 05:19:04,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 05:19:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-11 05:19:04,249 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:04,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:04,937 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-01-11 05:19:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 05:19:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-11 05:19:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:04,938 INFO L225 Difference]: With dead ends: 39 [2022-01-11 05:19:04,938 INFO L226 Difference]: Without dead ends: 34 [2022-01-11 05:19:04,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-11 05:19:04,939 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:04,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 51 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 05:19:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-11 05:19:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-01-11 05:19:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-11 05:19:04,944 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 24 [2022-01-11 05:19:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:04,944 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-11 05:19:04,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-11 05:19:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-11 05:19:04,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:04,945 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] [2022-01-11 05:19:04,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 05:19:04,945 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash -609860333, now seen corresponding path program 1 times [2022-01-11 05:19:04,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:04,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504249782] [2022-01-11 05:19:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:04,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:19:05,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504249782] [2022-01-11 05:19:05,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504249782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 05:19:05,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 05:19:05,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 05:19:05,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900443549] [2022-01-11 05:19:05,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 05:19:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 05:19:05,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 05:19:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-11 05:19:05,050 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:05,228 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-11 05:19:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 05:19:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-11 05:19:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:05,229 INFO L225 Difference]: With dead ends: 36 [2022-01-11 05:19:05,229 INFO L226 Difference]: Without dead ends: 28 [2022-01-11 05:19:05,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-11 05:19:05,230 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:05,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 05:19:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-11 05:19:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-11 05:19:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:05,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-11 05:19:05,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2022-01-11 05:19:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:05,235 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-11 05:19:05,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-11 05:19:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-11 05:19:05,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:05,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:05,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 05:19:05,236 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1966048170, now seen corresponding path program 1 times [2022-01-11 05:19:05,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:05,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529041452] [2022-01-11 05:19:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:05,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:19:06,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:06,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529041452] [2022-01-11 05:19:06,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529041452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:19:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90332719] [2022-01-11 05:19:06,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:06,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:19:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:19:06,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:19:06,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 05:19:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:06,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-11 05:19:06,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:19:06,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-11 05:19:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:19:06,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:19:06,708 INFO L353 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-01-11 05:19:06,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 28 [2022-01-11 05:19:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:19:06,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90332719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:19:06,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:19:06,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 22 [2022-01-11 05:19:06,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566841942] [2022-01-11 05:19:06,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:19:06,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-11 05:19:06,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:06,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-11 05:19:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-11 05:19:06,741 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:08,915 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-01-11 05:19:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-11 05:19:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-11 05:19:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:08,917 INFO L225 Difference]: With dead ends: 46 [2022-01-11 05:19:08,918 INFO L226 Difference]: Without dead ends: 38 [2022-01-11 05:19:08,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2022-01-11 05:19:08,919 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 173 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:08,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 90 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-11 05:19:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-11 05:19:08,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-01-11 05:19:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-11 05:19:08,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 27 [2022-01-11 05:19:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:08,925 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-11 05:19:08,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-11 05:19:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-11 05:19:08,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:08,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:08,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 05:19:09,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:19:09,144 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:09,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:09,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1994677321, now seen corresponding path program 1 times [2022-01-11 05:19:09,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:09,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840393232] [2022-01-11 05:19:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:09,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:19:09,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840393232] [2022-01-11 05:19:09,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840393232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:19:09,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285800578] [2022-01-11 05:19:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:09,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:19:09,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:19:09,622 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:19:09,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 05:19:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-11 05:19:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:19:10,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 05:19:10,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-01-11 05:19:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 05:19:10,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:19:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 05:19:10,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285800578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:19:10,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:19:10,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 12] total 26 [2022-01-11 05:19:10,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805134255] [2022-01-11 05:19:10,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:19:10,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-11 05:19:10,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-11 05:19:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-01-11 05:19:10,691 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:11,521 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-01-11 05:19:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 05:19:11,522 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-11 05:19:11,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:11,522 INFO L225 Difference]: With dead ends: 45 [2022-01-11 05:19:11,522 INFO L226 Difference]: Without dead ends: 33 [2022-01-11 05:19:11,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2022-01-11 05:19:11,524 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:11,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 82 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 05:19:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-11 05:19:11,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-11 05:19:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-11 05:19:11,529 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2022-01-11 05:19:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:11,529 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-11 05:19:11,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-11 05:19:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-11 05:19:11,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:11,530 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:11,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 05:19:11,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-11 05:19:11,741 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash -127484116, now seen corresponding path program 2 times [2022-01-11 05:19:11,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:11,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584874517] [2022-01-11 05:19:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:11,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 05:19:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 05:19:12,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 05:19:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584874517] [2022-01-11 05:19:12,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584874517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 05:19:12,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300035608] [2022-01-11 05:19:12,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 05:19:12,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:19:12,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 05:19:12,631 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 05:19:12,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 05:19:14,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 05:19:14,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 05:19:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-11 05:19:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 05:19:14,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-11 05:19:14,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 05:19:14,174 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-11 05:19:14,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2022-01-11 05:19:14,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-01-11 05:19:14,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-01-11 05:19:14,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-11 05:19:14,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-01-11 05:19:14,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-11 05:19:14,461 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-11 05:19:14,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 18 [2022-01-11 05:19:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:19:14,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 05:19:14,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:19:14,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-11 05:19:15,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:19:15,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-01-11 05:19:15,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:19:15,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 57 [2022-01-11 05:19:15,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-11 05:19:15,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2022-01-11 05:19:15,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-11 05:19:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-11 05:19:15,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300035608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 05:19:15,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 05:19:15,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 37 [2022-01-11 05:19:15,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249354406] [2022-01-11 05:19:15,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 05:19:15,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-11 05:19:15,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 05:19:15,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-11 05:19:15,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1222, Unknown=2, NotChecked=0, Total=1332 [2022-01-11 05:19:15,544 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 05:19:17,567 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-01-11 05:19:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-11 05:19:17,568 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-11 05:19:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 05:19:17,568 INFO L225 Difference]: With dead ends: 52 [2022-01-11 05:19:17,569 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 05:19:17,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=356, Invalid=2504, Unknown=2, NotChecked=0, Total=2862 [2022-01-11 05:19:17,570 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-11 05:19:17,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 140 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 297 Invalid, 0 Unknown, 90 Unchecked, 0.9s Time] [2022-01-11 05:19:17,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 05:19:17,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-11 05:19:17,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-01-11 05:19:17,576 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 31 [2022-01-11 05:19:17,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 05:19:17,577 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-01-11 05:19:17,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 05:19:17,577 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-01-11 05:19:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 05:19:17,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 05:19:17,577 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 05:19:17,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-11 05:19:17,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 05:19:17,784 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 05:19:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 05:19:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1273251607, now seen corresponding path program 3 times [2022-01-11 05:19:17,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 05:19:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626795981] [2022-01-11 05:19:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 05:19:17,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 05:19:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat