/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_LAZY.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:22:58,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:22:58,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:22:58,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 18:22:58,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 18:22:58,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 18:22:58,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 18:22:58,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 18:22:58,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 18:22:58,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 18:22:58,582 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 18:22:58,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 18:22:58,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:22:58,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:22:58,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:22:58,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:22:58,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:22:58,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:22:58,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:22:58,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:22:58,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:22:58,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:22:58,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:22:58,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:22:58,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 18:22:58,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 18:22:58,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 18:22:58,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 18:22:58,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 18:22:58,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 18:22:58,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 18:22:58,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 18:22:58,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 18:22:58,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 18:22:58,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 18:22:58,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 18:22:58,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 18:22:58,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 18:22:58,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:22:58,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:22:58,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:22:58,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 18:22:58,657 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:22:58,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:22:58,658 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:22:58,658 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:22:58,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:22:58,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:22:58,659 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:22:58,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:22:58,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:22:58,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:22:58,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:22:58,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:22:58,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:22:58,660 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:22:58,660 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:22:58,660 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:22:58,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:22:58,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:22:58,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:22:58,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:22:58,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:22:58,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:22:58,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:22:58,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:22:58,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:22:58,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:22:58,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:22:58,662 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:22:58,662 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:22:58,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:22:58,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:22:58,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:22:58,663 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:22:58,663 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:22:58,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:22:58,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:22:58,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:22:58,902 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:22:58,904 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:22:58,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2022-01-10 18:22:58,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d76afb60/1ffe91a41cb942c297a09bf9d3fa50fd/FLAGb11e38976 [2022-01-10 18:22:59,326 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:22:59,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2022-01-10 18:22:59,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d76afb60/1ffe91a41cb942c297a09bf9d3fa50fd/FLAGb11e38976 [2022-01-10 18:22:59,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d76afb60/1ffe91a41cb942c297a09bf9d3fa50fd [2022-01-10 18:22:59,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:22:59,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:22:59,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:22:59,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:22:59,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:22:59,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ef3fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59, skipping insertion in model container [2022-01-10 18:22:59,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:22:59,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:22:59,917 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c[947,960] [2022-01-10 18:22:59,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:22:59,928 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:22:59,940 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c[947,960] [2022-01-10 18:22:59,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:22:59,951 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:22:59,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59 WrapperNode [2022-01-10 18:22:59,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:22:59,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:22:59,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:22:59,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:22:59,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,979 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 18:22:59,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:22:59,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:22:59,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:22:59,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:22:59,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:22:59,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:22:59,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:22:59,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:22:59,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:22:59,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (1/1) ... [2022-01-10 18:23:00,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:23:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:00,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 18:23:00,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 18:23:00,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:23:00,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:23:00,062 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-10 18:23:00,062 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-10 18:23:00,063 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-10 18:23:00,063 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-10 18:23:00,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:23:00,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:23:00,121 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:23:00,123 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:23:00,264 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:23:00,270 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:23:00,270 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:23:00,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:00 BoogieIcfgContainer [2022-01-10 18:23:00,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:23:00,272 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:23:00,272 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:23:00,273 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:23:00,276 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:00" (1/1) ... [2022-01-10 18:23:00,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:23:00 BasicIcfg [2022-01-10 18:23:00,374 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:23:00,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:23:00,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:23:00,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:23:00,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:22:59" (1/4) ... [2022-01-10 18:23:00,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a79e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:23:00, skipping insertion in model container [2022-01-10 18:23:00,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:59" (2/4) ... [2022-01-10 18:23:00,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a79e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:23:00, skipping insertion in model container [2022-01-10 18:23:00,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:23:00" (3/4) ... [2022-01-10 18:23:00,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a79e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:23:00, skipping insertion in model container [2022-01-10 18:23:00,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:23:00" (4/4) ... [2022-01-10 18:23:00,401 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.cTransformedIcfg [2022-01-10 18:23:00,405 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:23:00,405 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:23:00,460 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:23:00,474 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 18:23:00,475 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:23:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 18:23:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:23:00,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:00,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:00,495 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-10 18:23:00,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:00,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415576252] [2022-01-10 18:23:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:00,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:23:00,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:00,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415576252] [2022-01-10 18:23:00,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415576252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:00,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:00,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:23:00,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363951143] [2022-01-10 18:23:00,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:00,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:23:00,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:00,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:23:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:23:00,814 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:23:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:00,848 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-10 18:23:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:23:00,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 18:23:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:00,859 INFO L225 Difference]: With dead ends: 41 [2022-01-10 18:23:00,859 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 18:23:00,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:23:00,864 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:00,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 118 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 18:23:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 18:23:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 18:23:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:23:00,906 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-10 18:23:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:00,907 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:23:00,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:23:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:23:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 18:23:00,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:00,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:00,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:23:00,909 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-10 18:23:00,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:00,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436614609] [2022-01-10 18:23:00,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:00,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 18:23:00,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:00,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436614609] [2022-01-10 18:23:00,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436614609] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:00,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:00,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:23:00,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492775675] [2022-01-10 18:23:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:00,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:23:00,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:23:00,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:23:00,978 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:23:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:01,054 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-10 18:23:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:23:01,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 18:23:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:01,055 INFO L225 Difference]: With dead ends: 31 [2022-01-10 18:23:01,055 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 18:23:01,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:23:01,057 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:01,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 18:23:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 18:23:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 18:23:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:23:01,064 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-10 18:23:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:01,065 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:23:01,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:23:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:23:01,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:23:01,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:01,066 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:01,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:23:01,067 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-10 18:23:01,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:01,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131848690] [2022-01-10 18:23:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:01,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:23:01,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:01,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131848690] [2022-01-10 18:23:01,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131848690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:01,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659418742] [2022-01-10 18:23:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:01,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:01,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:01,372 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) [2022-01-10 18:23:01,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 18:23:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:23:01,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:23:01,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659418742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:01,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:23:01,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-01-10 18:23:01,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028141864] [2022-01-10 18:23:01,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:01,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:23:01,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:01,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:23:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:23:01,689 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:23:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:01,725 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-01-10 18:23:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:23:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-10 18:23:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:01,727 INFO L225 Difference]: With dead ends: 38 [2022-01-10 18:23:01,727 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 18:23:01,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-10 18:23:01,729 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:01,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 184 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:01,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 18:23:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-10 18:23:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-10 18:23:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 18:23:01,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-10 18:23:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:01,737 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 18:23:01,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:23:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 18:23:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 18:23:01,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:01,739 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] [2022-01-10 18:23:01,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:01,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:01,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:01,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1726490069, now seen corresponding path program 1 times [2022-01-10 18:23:01,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:01,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214777528] [2022-01-10 18:23:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:01,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:01,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:23:02,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:02,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214777528] [2022-01-10 18:23:02,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214777528] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:02,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:23:02,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 18:23:02,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515827828] [2022-01-10 18:23:02,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:02,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 18:23:02,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:02,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 18:23:02,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 18:23:02,086 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:23:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:02,196 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-01-10 18:23:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:23:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-10 18:23:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:02,206 INFO L225 Difference]: With dead ends: 41 [2022-01-10 18:23:02,206 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 18:23:02,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-10 18:23:02,212 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:02,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:23:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 18:23:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-10 18:23:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-01-10 18:23:02,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2022-01-10 18:23:02,220 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 23 [2022-01-10 18:23:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:02,220 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2022-01-10 18:23:02,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 18:23:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2022-01-10 18:23:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 18:23:02,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:02,222 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 18:23:02,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 18:23:02,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:02,223 INFO L85 PathProgramCache]: Analyzing trace with hash -312577904, now seen corresponding path program 1 times [2022-01-10 18:23:02,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:02,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332212380] [2022-01-10 18:23:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:02,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:23:02,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332212380] [2022-01-10 18:23:02,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332212380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635415940] [2022-01-10 18:23:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:02,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:02,688 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) [2022-01-10 18:23:02,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 18:23:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 18:23:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:03,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 18:23:03,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:23:03,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635415940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:23:03,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:23:03,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2022-01-10 18:23:03,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030259969] [2022-01-10 18:23:03,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:23:03,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 18:23:03,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:03,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 18:23:03,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:23:03,066 INFO L87 Difference]: Start difference. First operand 32 states and 47 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:23:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:03,110 INFO L93 Difference]: Finished difference Result 50 states and 78 transitions. [2022-01-10 18:23:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 18:23:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-01-10 18:23:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:03,113 INFO L225 Difference]: With dead ends: 50 [2022-01-10 18:23:03,113 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 18:23:03,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-10 18:23:03,114 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:03,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 192 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:23:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 18:23:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-01-10 18:23:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-10 18:23:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2022-01-10 18:23:03,136 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 34 [2022-01-10 18:23:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:03,137 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2022-01-10 18:23:03,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 18:23:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2022-01-10 18:23:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 18:23:03,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:03,142 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1] [2022-01-10 18:23:03,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:03,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:03,365 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:03,366 INFO L85 PathProgramCache]: Analyzing trace with hash 176289166, now seen corresponding path program 1 times [2022-01-10 18:23:03,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:03,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697839782] [2022-01-10 18:23:03,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:03,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:23:03,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697839782] [2022-01-10 18:23:03,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697839782] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984822816] [2022-01-10 18:23:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:03,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:03,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:03,671 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) [2022-01-10 18:23:03,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 18:23:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:03,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:03,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:23:03,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:23:04,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984822816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:04,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:04,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 22 [2022-01-10 18:23:04,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447900973] [2022-01-10 18:23:04,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:04,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 18:23:04,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 18:23:04,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:23:04,491 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 18:23:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:05,098 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2022-01-10 18:23:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 18:23:05,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 35 [2022-01-10 18:23:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:05,101 INFO L225 Difference]: With dead ends: 99 [2022-01-10 18:23:05,101 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 18:23:05,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-01-10 18:23:05,103 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:05,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 312 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 18:23:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 18:23:05,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2022-01-10 18:23:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 11 states have return successors, (41), 15 states have call predecessors, (41), 9 states have call successors, (41) [2022-01-10 18:23:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 84 transitions. [2022-01-10 18:23:05,119 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 84 transitions. Word has length 35 [2022-01-10 18:23:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:05,119 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 84 transitions. [2022-01-10 18:23:05,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-10 18:23:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 84 transitions. [2022-01-10 18:23:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 18:23:05,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:05,121 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1] [2022-01-10 18:23:05,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:05,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:05,335 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1759393138, now seen corresponding path program 2 times [2022-01-10 18:23:05,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:05,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898286358] [2022-01-10 18:23:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:05,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:23:05,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898286358] [2022-01-10 18:23:05,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898286358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383421238] [2022-01-10 18:23:05,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:23:05,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:05,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:05,535 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:05,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 18:23:05,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:23:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:05,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:23:05,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:06,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:23:06,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383421238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:06,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:06,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-10 18:23:06,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645849873] [2022-01-10 18:23:06,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:06,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 18:23:06,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:06,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 18:23:06,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-10 18:23:06,425 INFO L87 Difference]: Start difference. First operand 51 states and 84 transitions. Second operand has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 18:23:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:06,963 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2022-01-10 18:23:06,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:23:06,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 35 [2022-01-10 18:23:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:06,965 INFO L225 Difference]: With dead ends: 141 [2022-01-10 18:23:06,965 INFO L226 Difference]: Without dead ends: 74 [2022-01-10 18:23:06,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-10 18:23:06,967 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:06,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 231 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 18:23:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-10 18:23:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2022-01-10 18:23:06,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 11 states have call successors, (11), 4 states have call predecessors, (11), 14 states have return successors, (48), 18 states have call predecessors, (48), 11 states have call successors, (48) [2022-01-10 18:23:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2022-01-10 18:23:06,978 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 35 [2022-01-10 18:23:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:06,978 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2022-01-10 18:23:06,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 18:23:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2022-01-10 18:23:06,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:23:06,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:06,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:07,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:07,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:07,200 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash 94684969, now seen corresponding path program 1 times [2022-01-10 18:23:07,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85684703] [2022-01-10 18:23:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:07,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:23:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:23:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:23:07,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85684703] [2022-01-10 18:23:07,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85684703] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030736553] [2022-01-10 18:23:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:07,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:07,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:07,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:07,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 18:23:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:07,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:23:07,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:23:07,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 18:23:08,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030736553] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:08,204 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:08,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-10 18:23:08,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775944374] [2022-01-10 18:23:08,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:08,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 18:23:08,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:08,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 18:23:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-10 18:23:08,206 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:23:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:08,568 INFO L93 Difference]: Finished difference Result 154 states and 294 transitions. [2022-01-10 18:23:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:23:08,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 47 [2022-01-10 18:23:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:08,570 INFO L225 Difference]: With dead ends: 154 [2022-01-10 18:23:08,570 INFO L226 Difference]: Without dead ends: 89 [2022-01-10 18:23:08,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:23:08,571 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:08,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 237 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:23:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-10 18:23:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-01-10 18:23:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 14 states have call successors, (14), 5 states have call predecessors, (14), 17 states have return successors, (66), 23 states have call predecessors, (66), 14 states have call successors, (66) [2022-01-10 18:23:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 135 transitions. [2022-01-10 18:23:08,584 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 135 transitions. Word has length 47 [2022-01-10 18:23:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:08,584 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 135 transitions. [2022-01-10 18:23:08,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:23:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 135 transitions. [2022-01-10 18:23:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 18:23:08,586 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:08,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:08,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:08,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:08,802 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1359840148, now seen corresponding path program 1 times [2022-01-10 18:23:08,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:08,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865127620] [2022-01-10 18:23:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:08,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:08,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:09,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:09,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:09,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-10 18:23:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 18:23:09,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865127620] [2022-01-10 18:23:09,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865127620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:09,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796889925] [2022-01-10 18:23:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:09,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:09,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:09,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:09,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 18:23:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 18:23:09,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 18:23:09,637 INFO L328 TraceCheckSpWp]: Computing backward predicates...