/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/eca-rers2012/Problem14_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 04:35:40,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 04:35:40,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 04:35:40,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 04:35:40,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 04:35:40,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 04:35:40,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 04:35:40,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 04:35:40,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 04:35:40,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 04:35:40,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 04:35:40,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 04:35:40,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 04:35:40,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 04:35:40,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 04:35:40,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 04:35:40,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 04:35:40,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 04:35:40,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 04:35:40,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 04:35:40,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 04:35:40,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 04:35:40,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 04:35:40,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 04:35:40,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 04:35:40,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 04:35:40,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 04:35:40,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 04:35:40,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 04:35:40,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 04:35:40,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 04:35:40,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 04:35:40,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 04:35:40,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 04:35:40,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 04:35:40,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 04:35:40,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 04:35:40,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 04:35:40,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 04:35:40,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 04:35:40,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 04:35:40,260 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 04:35:40,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 04:35:40,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 04:35:40,285 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 04:35:40,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 04:35:40,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 04:35:40,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 04:35:40,287 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 04:35:40,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 04:35:40,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 04:35:40,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 04:35:40,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 04:35:40,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 04:35:40,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 04:35:40,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 04:35:40,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 04:35:40,289 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 04:35:40,289 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 04:35:40,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 04:35:40,290 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 04:35:40,290 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 04:35:40,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 04:35:40,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 04:35:40,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 04:35:40,291 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 04:35:40,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 04:35:40,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 04:35:40,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 04:35:40,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 04:35:40,493 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 04:35:40,494 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 04:35:40,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52.c [2022-01-11 04:35:40,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babd13789/f5a9be6a3b244a2ea3f7826d50630f8f/FLAGdf13696ae [2022-01-11 04:35:40,958 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 04:35:40,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52.c [2022-01-11 04:35:40,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babd13789/f5a9be6a3b244a2ea3f7826d50630f8f/FLAGdf13696ae [2022-01-11 04:35:40,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/babd13789/f5a9be6a3b244a2ea3f7826d50630f8f [2022-01-11 04:35:40,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 04:35:40,992 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 04:35:40,993 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 04:35:40,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 04:35:40,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 04:35:40,996 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 04:35:40" (1/1) ... [2022-01-11 04:35:40,997 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ad65d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:40, skipping insertion in model container [2022-01-11 04:35:40,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 04:35:40" (1/1) ... [2022-01-11 04:35:41,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 04:35:41,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 04:35:41,215 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52.c[2478,2491] [2022-01-11 04:35:41,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 04:35:41,386 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 04:35:41,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52.c[2478,2491] [2022-01-11 04:35:41,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 04:35:41,511 INFO L208 MainTranslator]: Completed translation [2022-01-11 04:35:41,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41 WrapperNode [2022-01-11 04:35:41,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 04:35:41,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 04:35:41,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 04:35:41,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 04:35:41,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,593 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2022-01-11 04:35:41,594 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 04:35:41,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 04:35:41,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 04:35:41,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 04:35:41,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 04:35:41,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 04:35:41,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 04:35:41,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 04:35:41,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (1/1) ... [2022-01-11 04:35:41,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 04:35:41,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 04:35:41,690 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 04:35:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 04:35:41,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 04:35:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 04:35:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 04:35:41,707 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 04:35:41,773 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 04:35:41,774 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 04:35:43,771 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 04:35:43,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 04:35:43,777 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-11 04:35:43,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 04:35:43 BoogieIcfgContainer [2022-01-11 04:35:43,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 04:35:43,780 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 04:35:43,780 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 04:35:43,781 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 04:35:43,783 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 04:35:43" (1/1) ... [2022-01-11 04:35:44,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 04:35:44 BasicIcfg [2022-01-11 04:35:44,042 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 04:35:44,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 04:35:44,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 04:35:44,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 04:35:44,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 04:35:40" (1/4) ... [2022-01-11 04:35:44,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e3f397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 04:35:44, skipping insertion in model container [2022-01-11 04:35:44,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 04:35:41" (2/4) ... [2022-01-11 04:35:44,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e3f397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 04:35:44, skipping insertion in model container [2022-01-11 04:35:44,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 04:35:43" (3/4) ... [2022-01-11 04:35:44,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e3f397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 04:35:44, skipping insertion in model container [2022-01-11 04:35:44,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 04:35:44" (4/4) ... [2022-01-11 04:35:44,048 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label52.cTransformedIcfg [2022-01-11 04:35:44,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 04:35:44,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 04:35:44,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 04:35:44,093 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 04:35:44,093 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 04:35:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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 04:35:44,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 04:35:44,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 04:35:44,113 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] [2022-01-11 04:35:44,113 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 04:35:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 04:35:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -136447777, now seen corresponding path program 1 times [2022-01-11 04:35:44,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 04:35:44,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553715922] [2022-01-11 04:35:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 04:35:44,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 04:35:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 04:35:44,332 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 04:35:44,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 04:35:44,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553715922] [2022-01-11 04:35:44,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553715922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 04:35:44,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 04:35:44,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 04:35:44,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091320680] [2022-01-11 04:35:44,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 04:35:44,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 04:35:44,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 04:35:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 04:35:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 04:35:44,372 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 04:35:46,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:35:48,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:35:50,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:35:53,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:35:55,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:35:57,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:35:59,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:01,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:03,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:06,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:08,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:10,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:12,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:14,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:16,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:18,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:21,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:23,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:25,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:27,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:29,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:31,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:33,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:36,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:38,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:40,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:42,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:44,747 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:46,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:49,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:51,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:53,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:55,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:57,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:36:59,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-01-11 04:37:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 04:37:00,050 INFO L93 Difference]: Finished difference Result 669 states and 1200 transitions. [2022-01-11 04:37:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-11 04:37:00,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 22 [2022-01-11 04:37:00,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 04:37:00,060 INFO L225 Difference]: With dead ends: 669 [2022-01-11 04:37:00,060 INFO L226 Difference]: Without dead ends: 360 [2022-01-11 04:37:00,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 04:37:00,064 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 83 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.6s IncrementalHoareTripleChecker+Time [2022-01-11 04:37:00,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 77 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 553 Invalid, 35 Unknown, 0 Unchecked, 75.6s Time] [2022-01-11 04:37:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-11 04:37:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-11 04:37:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.6378830083565459) internal successors, (588), 359 states have internal predecessors, (588), 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 04:37:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 588 transitions. [2022-01-11 04:37:00,121 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 588 transitions. Word has length 22 [2022-01-11 04:37:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 04:37:00,121 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 588 transitions. [2022-01-11 04:37:00,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 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 04:37:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 588 transitions. [2022-01-11 04:37:00,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-11 04:37:00,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 04:37:00,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 04:37:00,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 04:37:00,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 04:37:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 04:37:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash 284726585, now seen corresponding path program 1 times [2022-01-11 04:37:00,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 04:37:00,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972301335] [2022-01-11 04:37:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 04:37:00,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 04:37:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 04:37:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 04:37:00,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 04:37:00,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972301335] [2022-01-11 04:37:00,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972301335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 04:37:00,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 04:37:00,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 04:37:00,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775503160] [2022-01-11 04:37:00,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 04:37:00,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-11 04:37:00,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 04:37:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-11 04:37:00,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-11 04:37:00,306 INFO L87 Difference]: Start difference. First operand 360 states and 588 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 04:37:02,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []