/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_i10_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 06:01:19,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 06:01:19,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 06:01:19,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 06:01:19,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 06:01:19,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 06:01:19,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 06:01:19,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 06:01:19,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 06:01:19,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 06:01:19,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 06:01:19,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 06:01:19,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 06:01:19,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 06:01:19,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 06:01:19,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 06:01:19,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 06:01:19,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 06:01:19,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 06:01:19,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 06:01:19,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 06:01:19,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 06:01:19,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 06:01:19,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 06:01:19,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 06:01:19,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 06:01:19,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 06:01:19,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 06:01:19,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 06:01:19,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 06:01:19,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 06:01:19,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 06:01:19,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 06:01:19,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 06:01:19,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 06:01:19,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 06:01:19,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 06:01:19,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 06:01:19,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 06:01:19,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 06:01:19,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 06:01:19,360 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 06:01:19,376 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 06:01:19,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 06:01:19,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 06:01:19,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 06:01:19,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 06:01:19,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 06:01:19,377 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 06:01:19,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 06:01:19,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 06:01:19,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 06:01:19,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 06:01:19,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 06:01:19,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 06:01:19,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:01:19,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 06:01:19,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 06:01:19,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 06:01:19,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 06:01:19,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 06:01:19,380 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 06:01:19,380 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 06:01:19,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 06:01:19,380 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 06:01:19,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 06:01:19,380 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 06:01:19,381 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 06:01:19,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 06:01:19,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 06:01:19,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 06:01:19,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 06:01:19,637 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 06:01:19,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2022-01-11 06:01:19,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ccec2385/b6dc0cf6018e421c90345216bd9cb6dc/FLAGf3a418d5d [2022-01-11 06:01:20,262 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 06:01:20,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-2.c [2022-01-11 06:01:20,271 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ccec2385/b6dc0cf6018e421c90345216bd9cb6dc/FLAGf3a418d5d [2022-01-11 06:01:20,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ccec2385/b6dc0cf6018e421c90345216bd9cb6dc [2022-01-11 06:01:20,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 06:01:20,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 06:01:20,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 06:01:20,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 06:01:20,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 06:01:20,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9d5c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20, skipping insertion in model container [2022-01-11 06:01:20,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 06:01:20" (1/1) ... [2022-01-11 06:01:20,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 06:01:20,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 06:01:20,525 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_i10_o10-2.c[454,467] [2022-01-11 06:01:20,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:01:20,580 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 06:01:20,596 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_i10_o10-2.c[454,467] [2022-01-11 06:01:20,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 06:01:20,636 INFO L208 MainTranslator]: Completed translation [2022-01-11 06:01:20,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 06:01:20 WrapperNode [2022-01-11 06:01:20,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 06:01:20,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 06:01:20,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 06:01:20,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 06:01:20,644 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 06:01:20,663 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 06:01:20,694 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2022-01-11 06:01:20,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 06:01:20,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 06:01:20,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 06:01:20,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 06:01:20,700 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 06:01:20,700 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 06:01:20,703 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 06:01:20,703 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 06:01:20,706 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 06:01:20,707 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 06:01:20,711 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 06:01:20,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 06:01:20,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 06:01:20,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 06:01:20,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 06:01:20,720 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 06:01:20,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 06:01:20,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:20,754 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 06:01:20,757 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 06:01:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 06:01:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 06:01:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 06:01:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 06:01:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-01-11 06:01:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-01-11 06:01:20,836 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 06:01:20,837 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 06:01:20,902 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 06:01:20,906 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 06:01:20,906 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 06:01:20,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 06:01:20 BoogieIcfgContainer [2022-01-11 06:01:20,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 06:01:20,908 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 06:01:20,908 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 06:01:20,909 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 06:01:20,910 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 06:01:20,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 06:01:20 BasicIcfg [2022-01-11 06:01:20,962 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 06:01:20,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 06:01:20,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 06:01:20,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 06:01:20,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 06:01:20" (1/4) ... [2022-01-11 06:01:20,965 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c133d90 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 06:01:20,966 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 06:01:20,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c133d90 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 06:01:20,966 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 06:01:20,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c133d90 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 06:01:20,966 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 06:01:20,967 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.cTransformedIcfg [2022-01-11 06:01:20,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 06:01:20,970 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 06:01:20,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 06:01:21,002 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 06:01:21,002 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 06:01:21,012 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 06:01:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 06:01:21,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:21,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:21,015 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:21,019 INFO L85 PathProgramCache]: Analyzing trace with hash 534385216, now seen corresponding path program 1 times [2022-01-11 06:01:21,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:21,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760570618] [2022-01-11 06:01:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:21,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 06:01:21,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:21,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760570618] [2022-01-11 06:01:21,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760570618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 06:01:21,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 06:01:21,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 06:01:21,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277785693] [2022-01-11 06:01:21,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 06:01:21,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 06:01:21,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:21,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 06:01:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 06:01:21,205 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 06:01:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:21,270 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-11 06:01:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 06:01:21,273 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 06:01:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:21,278 INFO L225 Difference]: With dead ends: 25 [2022-01-11 06:01:21,278 INFO L226 Difference]: Without dead ends: 15 [2022-01-11 06:01:21,282 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 06:01:21,286 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 06:01:21,287 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 06:01:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-11 06:01:21,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-11 06:01:21,314 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 06:01:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-01-11 06:01:21,316 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-01-11 06:01:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:21,317 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-01-11 06:01:21,318 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 06:01:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-01-11 06:01:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-11 06:01:21,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:21,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:21,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 06:01:21,321 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:21,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:21,322 INFO L85 PathProgramCache]: Analyzing trace with hash 38585541, now seen corresponding path program 1 times [2022-01-11 06:01:21,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:21,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694750536] [2022-01-11 06:01:21,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:21,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,530 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 06:01:21,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:21,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694750536] [2022-01-11 06:01:21,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694750536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:21,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083121678] [2022-01-11 06:01:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:21,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:21,533 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 06:01:21,534 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 06:01:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 06:01:21,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:21,680 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 06:01:21,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:21,901 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 06:01:21,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083121678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:21,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:21,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-11 06:01:21,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406732468] [2022-01-11 06:01:21,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:21,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 06:01:21,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 06:01:21,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-11 06:01:21,904 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 06:01:21,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:21,953 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-11 06:01:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 06:01:21,954 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 06:01:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:21,955 INFO L225 Difference]: With dead ends: 22 [2022-01-11 06:01:21,955 INFO L226 Difference]: Without dead ends: 18 [2022-01-11 06:01:21,955 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 06:01:21,956 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:21,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 55 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 06:01:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-11 06:01:21,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-11 06:01:21,959 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 06:01:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-11 06:01:21,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-01-11 06:01:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:21,960 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-11 06:01:21,960 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 06:01:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-11 06:01:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 06:01:21,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:21,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:21,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 06:01:22,182 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 06:01:22,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:22,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1495575968, now seen corresponding path program 2 times [2022-01-11 06:01:22,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:22,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517368185] [2022-01-11 06:01:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:22,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:22,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:22,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:22,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:22,434 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 06:01:22,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:22,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517368185] [2022-01-11 06:01:22,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517368185] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:22,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26433628] [2022-01-11 06:01:22,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:01:22,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:22,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:22,448 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 06:01:22,451 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 06:01:22,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:01:22,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:22,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 06:01:22,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:22,659 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 06:01:22,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:23,250 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 06:01:23,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26433628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:23,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:23,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-01-11 06:01:23,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668249688] [2022-01-11 06:01:23,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:23,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 06:01:23,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 06:01:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-01-11 06:01:23,253 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 06:01:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:23,414 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-01-11 06:01:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 06:01:23,414 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 06:01:23,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:23,415 INFO L225 Difference]: With dead ends: 25 [2022-01-11 06:01:23,415 INFO L226 Difference]: Without dead ends: 21 [2022-01-11 06:01:23,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-11 06:01:23,417 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 06:01:23,417 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 06:01:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-11 06:01:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-11 06:01:23,421 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 06:01:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-11 06:01:23,422 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-01-11 06:01:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:23,422 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-11 06:01:23,422 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 06:01:23,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-11 06:01:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-11 06:01:23,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:23,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:23,456 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 06:01:23,624 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 06:01:23,624 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash -278563547, now seen corresponding path program 3 times [2022-01-11 06:01:23,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:23,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406786697] [2022-01-11 06:01:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:23,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:23,896 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 06:01:23,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:23,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406786697] [2022-01-11 06:01:23,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406786697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:23,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517996961] [2022-01-11 06:01:23,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 06:01:23,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:23,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:23,900 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 06:01:23,937 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 06:01:23,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 06:01:23,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:23,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 06:01:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:24,263 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 06:01:24,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:25,271 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 06:01:25,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517996961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:25,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:25,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2022-01-11 06:01:25,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778599981] [2022-01-11 06:01:25,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:25,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 06:01:25,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 06:01:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-11 06:01:25,274 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 06:01:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:25,477 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-01-11 06:01:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 06:01:25,478 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 06:01:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:25,479 INFO L225 Difference]: With dead ends: 28 [2022-01-11 06:01:25,479 INFO L226 Difference]: Without dead ends: 24 [2022-01-11 06:01:25,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-01-11 06:01:25,480 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 06:01:25,481 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 06:01:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-11 06:01:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-11 06:01:25,484 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 06:01:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-11 06:01:25,485 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-01-11 06:01:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:25,485 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-11 06:01:25,485 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 06:01:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-11 06:01:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 06:01:25,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:25,486 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:25,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 06:01:25,687 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 06:01:25,687 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash -41530752, now seen corresponding path program 4 times [2022-01-11 06:01:25,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:25,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917129323] [2022-01-11 06:01:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:25,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:25,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:25,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:25,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:25,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:25,884 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 06:01:25,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:25,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917129323] [2022-01-11 06:01:25,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917129323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:25,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836128593] [2022-01-11 06:01:25,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 06:01:25,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:25,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:25,886 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 06:01:25,887 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 06:01:25,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 06:01:25,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 06:01:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:26,280 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 06:01:26,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:27,288 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 06:01:27,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836128593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:27,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:27,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 22 [2022-01-11 06:01:27,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709144067] [2022-01-11 06:01:27,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:27,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-11 06:01:27,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-11 06:01:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-01-11 06:01:27,290 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 06:01:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:27,504 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-01-11 06:01:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 06:01:27,505 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 06:01:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:27,506 INFO L225 Difference]: With dead ends: 31 [2022-01-11 06:01:27,506 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 06:01:27,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-01-11 06:01:27,507 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, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:27,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 134 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 06:01:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 06:01:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-11 06:01:27,511 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 06:01:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-11 06:01:27,512 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-01-11 06:01:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:27,512 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-11 06:01:27,512 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 06:01:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-11 06:01:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-11 06:01:27,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:27,517 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:27,535 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 06:01:27,721 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 06:01:27,721 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:27,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:27,722 INFO L85 PathProgramCache]: Analyzing trace with hash -10048123, now seen corresponding path program 5 times [2022-01-11 06:01:27,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:27,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290596096] [2022-01-11 06:01:27,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:27,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:27,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:27,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:27,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:27,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:28,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:28,129 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 06:01:28,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:28,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290596096] [2022-01-11 06:01:28,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290596096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:28,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607384954] [2022-01-11 06:01:28,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 06:01:28,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:28,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:28,131 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 06:01:28,167 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 06:01:28,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-11 06:01:28,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-11 06:01:28,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:28,556 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 06:01:28,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:29,895 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 06:01:29,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607384954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:29,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:29,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 25 [2022-01-11 06:01:29,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811789185] [2022-01-11 06:01:29,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:29,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-11 06:01:29,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:29,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-11 06:01:29,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-11 06:01:29,898 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 06:01:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:30,260 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-01-11 06:01:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 06:01:30,261 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 06:01:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:30,262 INFO L225 Difference]: With dead ends: 34 [2022-01-11 06:01:30,262 INFO L226 Difference]: Without dead ends: 30 [2022-01-11 06:01:30,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2022-01-11 06:01:30,263 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 06:01:30,263 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 06:01:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-11 06:01:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-11 06:01:30,267 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 06:01:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-11 06:01:30,268 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-01-11 06:01:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:30,268 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-11 06:01:30,268 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 06:01:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-11 06:01:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-11 06:01:30,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:30,269 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:30,297 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 06:01:30,478 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 06:01:30,479 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:30,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:30,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1028064608, now seen corresponding path program 6 times [2022-01-11 06:01:30,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:30,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904177642] [2022-01-11 06:01:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:30,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:30,744 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 06:01:30,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:30,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904177642] [2022-01-11 06:01:30,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904177642] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:30,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184023972] [2022-01-11 06:01:30,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-11 06:01:30,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:30,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:30,747 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 06:01:30,772 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 06:01:30,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-11 06:01:30,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-11 06:01:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:31,188 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 06:01:31,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:32,380 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 06:01:32,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184023972] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:32,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:32,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 28 [2022-01-11 06:01:32,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679659438] [2022-01-11 06:01:32,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:32,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 06:01:32,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:32,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 06:01:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-11 06:01:32,383 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 06:01:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:32,616 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-01-11 06:01:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 06:01:32,616 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 06:01:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:32,617 INFO L225 Difference]: With dead ends: 37 [2022-01-11 06:01:32,617 INFO L226 Difference]: Without dead ends: 33 [2022-01-11 06:01:32,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 06:01:32,618 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 06:01:32,618 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 06:01:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-11 06:01:32,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-11 06:01:32,621 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 06:01:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-11 06:01:32,622 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-01-11 06:01:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-11 06:01:32,622 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 06:01:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-11 06:01:32,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-11 06:01:32,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:32,623 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:32,641 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 06:01:32,823 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 06:01:32,824 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:32,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:32,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1798148635, now seen corresponding path program 7 times [2022-01-11 06:01:32,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:32,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805510677] [2022-01-11 06:01:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:32,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:32,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:33,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:33,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:33,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:33,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:33,119 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 06:01:33,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:33,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805510677] [2022-01-11 06:01:33,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805510677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:33,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105659525] [2022-01-11 06:01:33,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-11 06:01:33,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:33,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:33,121 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 06:01:33,148 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 06:01:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-11 06:01:33,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 06:01:33,880 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 06:01:33,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 06:01:41,528 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 06:01:41,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105659525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 06:01:41,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 06:01:41,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 19] total 35 [2022-01-11 06:01:41,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298394187] [2022-01-11 06:01:41,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 06:01:41,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-11 06:01:41,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 06:01:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-11 06:01:41,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 06:01:41,531 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 06:01:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 06:01:42,194 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-01-11 06:01:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-11 06:01:42,194 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 06:01:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 06:01:42,195 INFO L225 Difference]: With dead ends: 40 [2022-01-11 06:01:42,195 INFO L226 Difference]: Without dead ends: 36 [2022-01-11 06:01:42,196 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 06:01:42,197 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 06:01:42,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 263 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 06:01:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-11 06:01:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-11 06:01:42,200 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 06:01:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-01-11 06:01:42,201 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-01-11 06:01:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 06:01:42,201 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-01-11 06:01:42,201 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 06:01:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-01-11 06:01:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-11 06:01:42,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 06:01:42,202 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 06:01:42,233 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 06:01:42,419 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 06:01:42,420 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 06:01:42,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 06:01:42,420 INFO L85 PathProgramCache]: Analyzing trace with hash 718365376, now seen corresponding path program 8 times [2022-01-11 06:01:42,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 06:01:42,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450895904] [2022-01-11 06:01:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 06:01:42,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 06:01:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 06:01:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 06:01:42,850 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 06:01:42,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 06:01:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450895904] [2022-01-11 06:01:42,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450895904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 06:01:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350758329] [2022-01-11 06:01:42,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 06:01:42,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 06:01:42,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 06:01:42,852 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 06:01:42,879 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 06:01:43,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 06:01:43,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 06:01:43,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjunts are in the unsatisfiable core [2022-01-11 06:01:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates...