/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 06:01:19,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 06:01:19,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 06:01:19,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 06:01:19,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 06:01:19,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 06:01:19,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 06:01:19,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 06:01:19,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 06:01:19,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 06:01:19,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 06:01:19,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 06:01:19,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 06:01:19,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 06:01:19,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 06:01:19,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 06:01:19,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 06:01:19,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 06:01:19,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 06:01:19,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 06:01:19,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 06:01:19,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 06:01:19,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 06:01:19,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 06:01:19,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 06:01:19,225 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 06:01:19,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 06:01:19,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 06:01:19,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 06:01:19,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 06:01:19,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 06:01:19,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 06:01:19,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 06:01:19,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 06:01:19,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 06:01:19,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 06:01:19,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 06:01:19,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 06:01:19,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 06:01:19,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 06:01:19,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 06:01:19,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 06:01:19,263 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 06:01:19,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 06:01:19,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 06:01:19,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 06:01:19,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 06:01:19,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 06:01:19,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 06:01:19,265 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 06:01:19,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 06:01:19,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 06:01:19,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 06:01:19,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 06:01:19,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 06:01:19,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:01:19,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 06:01:19,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 06:01:19,266 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 06:01:19,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 06:01:19,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 06:01:19,267 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 06:01:19,269 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 06:01:19,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 06:01:19,269 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 06:01:19,269 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 06:01:19,270 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 06:01:19,270 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 06:01:19,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 06:01:19,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 06:01:19,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 06:01:19,492 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 06:01:19,493 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 06:01:19,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2022-01-11 06:01:19,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39216e5a3/73d204974c874aa7b2846845b84374e3/FLAGd939c73b5 [2022-01-11 06:01:19,937 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 06:01:19,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-1.c [2022-01-11 06:01:19,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39216e5a3/73d204974c874aa7b2846845b84374e3/FLAGd939c73b5 [2022-01-11 06:01:19,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39216e5a3/73d204974c874aa7b2846845b84374e3 [2022-01-11 06:01:19,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 06:01:19,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 06:01:19,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 06:01:19,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 06:01:19,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 06:01:19,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:01:19" (1/1) ... [2022-01-11 06:01:19,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73685019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:19, skipping insertion in model container [2022-01-11 06:01:19,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:01:19" (1/1) ... [2022-01-11 06:01:19,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 06:01:19,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:01:20,091 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/id_i15_o15-1.c[454,467] [2022-01-11 06:01:20,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:01:20,106 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 06:01:20,116 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/id_i15_o15-1.c[454,467] [2022-01-11 06:01:20,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:01:20,127 INFO L208 MainTranslator]: Completed translation [2022-01-11 06:01:20,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20 WrapperNode [2022-01-11 06:01:20,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 06:01:20,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 06:01:20,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 06:01:20,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 06:01:20,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,153 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-01-11 06:01:20,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 06:01:20,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 06:01:20,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 06:01:20,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 06:01:20,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 06:01:20,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 06:01:20,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 06:01:20,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 06:01:20,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:01:20,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:20,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 06:01:20,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 06:01:20,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 06:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 06:01:20,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 06:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 06:01:20,220 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-11 06:01:20,220 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-11 06:01:20,275 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 06:01:20,276 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 06:01:20,372 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 06:01:20,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 06:01:20,376 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 06:01:20,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:01:20 BoogieIcfgContainer [2022-01-11 06:01:20,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 06:01:20,378 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 06:01:20,378 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 06:01:20,379 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 06:01:20,390 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:01:20 BasicIcfg [2022-01-11 06:01:20,431 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 06:01:20,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 06:01:20,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 06:01:20,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 06:01:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 06:01:19" (1/4) ... [2022-01-11 06:01:20,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fb706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:01:20, skipping insertion in model container [2022-01-11 06:01:20,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20" (2/4) ... [2022-01-11 06:01:20,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fb706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 06:01:20, skipping insertion in model container [2022-01-11 06:01:20,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:01:20" (3/4) ... [2022-01-11 06:01:20,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12fb706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 06:01:20, skipping insertion in model container [2022-01-11 06:01:20,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:01:20" (4/4) ... [2022-01-11 06:01:20,443 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.cTransformedIcfg [2022-01-11 06:01:20,447 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 06:01:20,447 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 06:01:20,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 06:01:20,508 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 06:01:20,509 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 06:01:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 06:01:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 06:01:20,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:20,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:20,524 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times [2022-01-11 06:01:20,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:20,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167642747] [2022-01-11 06:01:20,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:20,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:20,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:01:20,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:20,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167642747] [2022-01-11 06:01:20,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167642747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:01:20,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:01:20,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:01:20,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830746094] [2022-01-11 06:01:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:01:20,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:01:20,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:01:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:01:20,788 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-01-11 06:01:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:20,843 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-11 06:01:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:01:20,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2022-01-11 06:01:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:20,853 INFO L225 Difference]: With dead ends: 25 [2022-01-11 06:01:20,853 INFO L226 Difference]: Without dead ends: 15 [2022-01-11 06:01:20,856 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 [2022-01-11 06:01:20,862 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:20,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:01:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-11 06:01:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-11 06:01:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 06:01:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-11 06:01:20,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-11 06:01:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:20,900 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-11 06:01:20,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2022-01-11 06:01:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-11 06:01:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 06:01:20,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:20,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:20,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:01:20,902 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:20,903 INFO L85 PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times [2022-01-11 06:01:20,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330823901] [2022-01-11 06:01:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:20,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:20,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 06:01:21,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330823901] [2022-01-11 06:01:21,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330823901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791126787] [2022-01-11 06:01:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:21,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:21,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:01:21,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 06:01:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 06:01:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 06:01:21,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 06:01:21,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791126787] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:21,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:21,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-11 06:01:21,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151085106] [2022-01-11 06:01:21,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:21,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 06:01:21,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 06:01:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-11 06:01:21,585 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-11 06:01:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:21,722 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-11 06:01:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 06:01:21,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 16 [2022-01-11 06:01:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:21,723 INFO L225 Difference]: With dead ends: 22 [2022-01-11 06:01:21,723 INFO L226 Difference]: Without dead ends: 18 [2022-01-11 06:01:21,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-01-11 06:01:21,725 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:21,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 55 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:01:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-11 06:01:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-11 06:01:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-11 06:01:21,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-11 06:01:21,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-11 06:01:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:21,729 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-11 06:01:21,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-11 06:01:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-11 06:01:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 06:01:21,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:21,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:21,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 06:01:21,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:21,946 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:21,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:21,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1495575968, now seen corresponding path program 2 times [2022-01-11 06:01:21,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:21,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700497881] [2022-01-11 06:01:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:21,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:22,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:22,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 06:01:22,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700497881] [2022-01-11 06:01:22,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700497881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:22,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658654913] [2022-01-11 06:01:22,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:01:22,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:22,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:22,151 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:01:22,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 06:01:22,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:01:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:01:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-11 06:01:22,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 06:01:22,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658654913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:22,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:22,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-01-11 06:01:22,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523782231] [2022-01-11 06:01:22,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:22,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 06:01:22,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 06:01:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-11 06:01:22,773 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-11 06:01:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:22,899 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-11 06:01:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 06:01:22,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-01-11 06:01:22,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:22,901 INFO L225 Difference]: With dead ends: 25 [2022-01-11 06:01:22,901 INFO L226 Difference]: Without dead ends: 21 [2022-01-11 06:01:22,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-11 06:01:22,902 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:22,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 106 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:01:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-11 06:01:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-11 06:01:22,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-11 06:01:22,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-11 06:01:22,906 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-11 06:01:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:22,906 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-11 06:01:22,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 20 states have internal predecessors, (35), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-11 06:01:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-11 06:01:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-11 06:01:22,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:22,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:22,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 06:01:23,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-11 06:01:23,141 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 3 times [2022-01-11 06:01:23,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436201871] [2022-01-11 06:01:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:23,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 06:01:23,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:23,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436201871] [2022-01-11 06:01:23,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436201871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:23,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175301107] [2022-01-11 06:01:23,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 06:01:23,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:23,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:01:23,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 06:01:23,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 06:01:23,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:23,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 06:01:23,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 06:01:23,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 06:01:24,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175301107] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:24,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:24,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2022-01-11 06:01:24,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480340209] [2022-01-11 06:01:24,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:24,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 06:01:24,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 06:01:24,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-11 06:01:24,129 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-11 06:01:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:24,300 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-11 06:01:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 06:01:24,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 28 [2022-01-11 06:01:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:24,302 INFO L225 Difference]: With dead ends: 28 [2022-01-11 06:01:24,302 INFO L226 Difference]: Without dead ends: 24 [2022-01-11 06:01:24,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-11 06:01:24,304 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:24,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 88 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:01:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-11 06:01:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-11 06:01:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-11 06:01:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-11 06:01:24,316 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-01-11 06:01:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:24,316 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-11 06:01:24,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-01-11 06:01:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-11 06:01:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 06:01:24,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:24,319 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:24,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-11 06:01:24,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:24,536 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash -41530752, now seen corresponding path program 4 times [2022-01-11 06:01:24,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665629489] [2022-01-11 06:01:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:24,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:24,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:24,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:24,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:24,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 06:01:24,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:24,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665629489] [2022-01-11 06:01:24,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665629489] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:24,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332810450] [2022-01-11 06:01:24,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 06:01:24,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:24,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:24,758 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) [2022-01-11 06:01:24,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 06:01:24,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 06:01:24,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 06:01:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 06:01:25,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-11 06:01:26,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332810450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:26,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:26,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 22 [2022-01-11 06:01:26,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527309170] [2022-01-11 06:01:26,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:26,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-11 06:01:26,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-11 06:01:26,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-11 06:01:26,210 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-11 06:01:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:26,562 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-01-11 06:01:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 06:01:26,564 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 34 [2022-01-11 06:01:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:26,565 INFO L225 Difference]: With dead ends: 31 [2022-01-11 06:01:26,565 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 06:01:26,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-01-11 06:01:26,566 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:26,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 134 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 06:01:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 06:01:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-11 06:01:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-11 06:01:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-11 06:01:26,574 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-01-11 06:01:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:26,574 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-11 06:01:26,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 22 states have internal predecessors, (40), 7 states have call successors, (7), 1 states have call predecessors, (7), 10 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-01-11 06:01:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-11 06:01:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-11 06:01:26,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:26,576 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:26,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-11 06:01:26,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:26,794 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:26,795 INFO L85 PathProgramCache]: Analyzing trace with hash -10048123, now seen corresponding path program 5 times [2022-01-11 06:01:26,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:26,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482870011] [2022-01-11 06:01:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:26,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:26,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:26,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:26,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:26,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:26,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:26,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-11 06:01:26,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482870011] [2022-01-11 06:01:26,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482870011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62017246] [2022-01-11 06:01:26,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 06:01:26,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:26,997 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) [2022-01-11 06:01:27,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 06:01:27,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-11 06:01:27,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-11 06:01:27,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-11 06:01:27,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-11 06:01:29,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62017246] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:29,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:29,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 25 [2022-01-11 06:01:29,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52300322] [2022-01-11 06:01:29,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:29,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-11 06:01:29,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-11 06:01:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-11 06:01:29,192 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-11 06:01:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:29,530 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-01-11 06:01:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 06:01:29,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 40 [2022-01-11 06:01:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:29,532 INFO L225 Difference]: With dead ends: 34 [2022-01-11 06:01:29,532 INFO L226 Difference]: Without dead ends: 30 [2022-01-11 06:01:29,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-01-11 06:01:29,539 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:29,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 181 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 06:01:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-11 06:01:29,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-11 06:01:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-11 06:01:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-11 06:01:29,549 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-01-11 06:01:29,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:29,551 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-11 06:01:29,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 25 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2022-01-11 06:01:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-11 06:01:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 06:01:29,553 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:29,553 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:29,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 06:01:29,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:29,768 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1028064608, now seen corresponding path program 6 times [2022-01-11 06:01:29,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:29,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777599357] [2022-01-11 06:01:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:29,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:29,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:29,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:29,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:29,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:29,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:29,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-11 06:01:30,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:30,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777599357] [2022-01-11 06:01:30,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777599357] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:30,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755313213] [2022-01-11 06:01:30,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-11 06:01:30,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:30,066 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) [2022-01-11 06:01:30,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 06:01:30,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-11 06:01:30,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:30,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-11 06:01:30,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-11 06:01:30,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-11 06:01:31,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755313213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:31,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:31,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 28 [2022-01-11 06:01:31,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153916776] [2022-01-11 06:01:31,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:31,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 06:01:31,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:31,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 06:01:31,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-11 06:01:31,762 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-11 06:01:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:32,061 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-11 06:01:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:01:32,062 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) Word has length 46 [2022-01-11 06:01:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:32,062 INFO L225 Difference]: With dead ends: 37 [2022-01-11 06:01:32,062 INFO L226 Difference]: Without dead ends: 33 [2022-01-11 06:01:32,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 06:01:32,063 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 136 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:32,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 187 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:01:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-11 06:01:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-11 06:01:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-11 06:01:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-11 06:01:32,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-01-11 06:01:32,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:32,067 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-11 06:01:32,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 28 states have internal predecessors, (52), 9 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (16), 13 states have call predecessors, (16), 9 states have call successors, (16) [2022-01-11 06:01:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-11 06:01:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-11 06:01:32,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:32,067 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:32,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 06:01:32,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:32,276 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1798148635, now seen corresponding path program 7 times [2022-01-11 06:01:32,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:32,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530339287] [2022-01-11 06:01:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:32,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-11 06:01:32,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:32,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530339287] [2022-01-11 06:01:32,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530339287] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:32,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840465637] [2022-01-11 06:01:32,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-11 06:01:32,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:32,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:32,533 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:01:32,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 06:01:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-11 06:01:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 17 proven. 87 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-11 06:01:33,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-11 06:01:41,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840465637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:41,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:41,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 19] total 35 [2022-01-11 06:01:41,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025811280] [2022-01-11 06:01:41,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:41,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-11 06:01:41,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-11 06:01:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 06:01:41,898 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-11 06:01:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:42,364 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-01-11 06:01:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-11 06:01:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) Word has length 52 [2022-01-11 06:01:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:42,367 INFO L225 Difference]: With dead ends: 40 [2022-01-11 06:01:42,367 INFO L226 Difference]: Without dead ends: 36 [2022-01-11 06:01:42,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2022-01-11 06:01:42,389 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:42,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 263 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 06:01:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-11 06:01:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-11 06:01:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-11 06:01:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-11 06:01:42,399 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-01-11 06:01:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:42,401 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-11 06:01:42,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.0) internal successors, (64), 35 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 18 states have return successors, (21), 17 states have call predecessors, (21), 11 states have call successors, (21) [2022-01-11 06:01:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-11 06:01:42,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-11 06:01:42,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:42,404 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:42,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-11 06:01:42,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:42,605 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:42,606 INFO L85 PathProgramCache]: Analyzing trace with hash 718365376, now seen corresponding path program 8 times [2022-01-11 06:01:42,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:42,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259193245] [2022-01-11 06:01:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:42,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-01-11 06:01:43,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259193245] [2022-01-11 06:01:43,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259193245] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811079414] [2022-01-11 06:01:43,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:01:43,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:43,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:43,029 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 06:01:43,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-11 06:01:43,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:01:43,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-11 06:01:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates...