/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_NONE.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:09:30,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:09:30,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:09:30,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 00:09:30,969 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 00:09:30,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 00:09:30,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 00:09:30,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 00:09:30,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 00:09:30,981 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 00:09:30,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 00:09:30,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 00:09:30,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:09:30,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:09:30,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:09:30,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:09:30,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:09:30,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:09:30,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:09:30,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:09:30,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:09:30,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:09:30,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:09:30,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:09:30,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 00:09:30,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 00:09:30,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 00:09:30,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 00:09:30,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 00:09:30,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 00:09:31,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 00:09:31,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 00:09:31,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 00:09:31,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 00:09:31,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 00:09:31,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 00:09:31,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 00:09:31,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 00:09:31,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:09:31,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:09:31,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:09:31,005 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-11 00:09:31,027 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:09:31,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:09:31,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:09:31,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:09:31,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:09:31,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:09:31,029 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:09:31,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:09:31,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:09:31,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:09:31,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:09:31,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:09:31,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:09:31,030 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:09:31,030 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:09:31,030 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:09:31,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:09:31,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:09:31,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:09:31,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:09:31,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:09:31,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:09:31,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:09:31,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:09:31,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:09:31,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:09:31,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:09:31,031 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:09:31,032 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:09:31,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:09:31,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:09:31,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:09:31,033 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:09:31,033 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:09:31,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:09:31,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:09:31,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:09:31,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:09:31,252 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:09:31,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci04.c [2022-01-11 00:09:31,325 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a159538a/fcc03c1c16e245f2b68b151fa6e79a0f/FLAG550c920b3 [2022-01-11 00:09:31,704 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:09:31,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci04.c [2022-01-11 00:09:31,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a159538a/fcc03c1c16e245f2b68b151fa6e79a0f/FLAG550c920b3 [2022-01-11 00:09:31,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a159538a/fcc03c1c16e245f2b68b151fa6e79a0f [2022-01-11 00:09:31,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:09:31,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:09:31,728 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:09:31,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:09:31,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:09:31,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701bab60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31, skipping insertion in model container [2022-01-11 00:09:31,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,738 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:09:31,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:09:31,901 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/Fibonacci04.c[780,793] [2022-01-11 00:09:31,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:09:31,914 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:09:31,929 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/Fibonacci04.c[780,793] [2022-01-11 00:09:31,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:09:31,943 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:09:31,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31 WrapperNode [2022-01-11 00:09:31,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:09:31,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:09:31,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:09:31,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:09:31,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,968 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-01-11 00:09:31,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:09:31,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:09:31,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:09:31,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:09:31,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:31,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:09:31,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:09:31,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:09:31,995 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:09:31,995 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (1/1) ... [2022-01-11 00:09:32,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:09:32,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:09:32,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 00:09:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2022-01-11 00:09:32,061 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2022-01-11 00:09:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:09:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:09:32,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:09:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:09:32,055 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 00:09:32,110 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:09:32,111 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:09:32,240 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:09:32,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:09:32,246 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:09:32,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:09:32 BoogieIcfgContainer [2022-01-11 00:09:32,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:09:32,249 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:09:32,249 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:09:32,250 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:09:32,252 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:09:32" (1/1) ... [2022-01-11 00:09:32,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:09:32 BasicIcfg [2022-01-11 00:09:32,315 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:09:32,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:09:32,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:09:32,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:09:32,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:09:31" (1/4) ... [2022-01-11 00:09:32,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dc8bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:09:32, skipping insertion in model container [2022-01-11 00:09:32,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:09:31" (2/4) ... [2022-01-11 00:09:32,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dc8bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:09:32, skipping insertion in model container [2022-01-11 00:09:32,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:09:32" (3/4) ... [2022-01-11 00:09:32,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dc8bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:09:32, skipping insertion in model container [2022-01-11 00:09:32,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:09:32" (4/4) ... [2022-01-11 00:09:32,320 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci04.cTransformedIcfg [2022-01-11 00:09:32,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:09:32,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:09:32,375 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:09:32,381 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 00:09:32,381 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:09:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 00:09:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:09:32,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:09:32,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:09:32,404 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:09:32,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:09:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash 831073435, now seen corresponding path program 1 times [2022-01-11 00:09:32,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:09:32,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822921704] [2022-01-11 00:09:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:09:32,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:09:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:09:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:32,710 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 00:09:32,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:09:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822921704] [2022-01-11 00:09:32,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822921704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:09:32,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:09:32,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:09:32,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26378386] [2022-01-11 00:09:32,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:09:32,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:09:32,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:09:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:09:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:09:32,745 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) 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 00:09:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:09:32,856 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-01-11 00:09:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:09:32,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 00:09:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:09:32,872 INFO L225 Difference]: With dead ends: 30 [2022-01-11 00:09:32,872 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 00:09:32,876 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 00:09:32,881 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:09:32,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 38 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:09:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 00:09:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 00:09:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:09:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:09:32,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 00:09:32,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:09:32,924 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:09:32,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) 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 00:09:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:09:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:09:32,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:09:32,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:09:32,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:09:32,927 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:09:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:09:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash 901827128, now seen corresponding path program 1 times [2022-01-11 00:09:32,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:09:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720763792] [2022-01-11 00:09:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:09:32,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:09:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:32,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:09:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:33,018 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 00:09:33,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:09:33,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720763792] [2022-01-11 00:09:33,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720763792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:09:33,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:09:33,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:09:33,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611112516] [2022-01-11 00:09:33,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:09:33,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:09:33,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:09:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:09:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:09:33,022 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:09:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:09:33,073 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 00:09:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:09:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-11 00:09:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:09:33,075 INFO L225 Difference]: With dead ends: 23 [2022-01-11 00:09:33,075 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 00:09:33,079 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 00:09:33,080 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:09:33,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:09:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 00:09:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 00:09:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:09:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:09:33,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 00:09:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:09:33,092 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:09:33,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:09:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:09:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:09:33,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:09:33,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:09:33,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:09:33,099 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:09:33,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:09:33,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1720611576, now seen corresponding path program 1 times [2022-01-11 00:09:33,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:09:33,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520817080] [2022-01-11 00:09:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:09:33,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:09:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:33,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:09:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:33,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:33,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:09:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:09:33,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:09:33,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520817080] [2022-01-11 00:09:33,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520817080] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:09:33,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721012356] [2022-01-11 00:09:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:09:33,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:09:33,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:09:33,400 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 00:09:33,401 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 00:09:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:33,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-11 00:09:33,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:09:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:09:33,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:09:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:09:33,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721012356] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:09:33,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:09:33,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 7] total 18 [2022-01-11 00:09:33,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488490313] [2022-01-11 00:09:33,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:09:33,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 00:09:33,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:09:33,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 00:09:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-01-11 00:09:33,919 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-11 00:09:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:09:34,408 INFO L93 Difference]: Finished difference Result 37 states and 61 transitions. [2022-01-11 00:09:34,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 00:09:34,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 22 [2022-01-11 00:09:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:09:34,410 INFO L225 Difference]: With dead ends: 37 [2022-01-11 00:09:34,410 INFO L226 Difference]: Without dead ends: 31 [2022-01-11 00:09:34,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-01-11 00:09:34,411 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 00:09:34,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 63 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 00:09:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-11 00:09:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-11 00:09:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2022-01-11 00:09:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 48 transitions. [2022-01-11 00:09:34,418 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 48 transitions. Word has length 22 [2022-01-11 00:09:34,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:09:34,419 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 48 transitions. [2022-01-11 00:09:34,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-11 00:09:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 48 transitions. [2022-01-11 00:09:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 00:09:34,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:09:34,421 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:09:34,461 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 00:09:34,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:09:34,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:09:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:09:34,636 INFO L85 PathProgramCache]: Analyzing trace with hash -454623176, now seen corresponding path program 1 times [2022-01-11 00:09:34,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:09:34,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8522401] [2022-01-11 00:09:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:09:34,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:09:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:34,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:09:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:34,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:34,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:34,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:09:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:34,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:09:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:34,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:35,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:35,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:09:35,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:35,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:09:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:09:35,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:09:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8522401] [2022-01-11 00:09:35,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8522401] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:09:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245242770] [2022-01-11 00:09:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:09:35,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:09:35,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:09:35,033 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 00:09:35,065 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 00:09:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:35,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:09:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:09:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 70 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-11 00:09:35,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:09:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:09:35,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245242770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:09:35,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:09:35,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 23 [2022-01-11 00:09:35,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629094726] [2022-01-11 00:09:35,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:09:35,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-11 00:09:35,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:09:35,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-11 00:09:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-01-11 00:09:35,907 INFO L87 Difference]: Start difference. First operand 29 states and 48 transitions. Second operand has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-11 00:09:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:09:36,209 INFO L93 Difference]: Finished difference Result 89 states and 214 transitions. [2022-01-11 00:09:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 00:09:36,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) Word has length 61 [2022-01-11 00:09:36,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:09:36,212 INFO L225 Difference]: With dead ends: 89 [2022-01-11 00:09:36,212 INFO L226 Difference]: Without dead ends: 61 [2022-01-11 00:09:36,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2022-01-11 00:09:36,214 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:09:36,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 125 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:09:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-11 00:09:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2022-01-11 00:09:36,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 10 states have return successors, (60), 15 states have call predecessors, (60), 10 states have call successors, (60) [2022-01-11 00:09:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2022-01-11 00:09:36,226 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 61 [2022-01-11 00:09:36,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:09:36,226 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2022-01-11 00:09:36,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 12 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-01-11 00:09:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2022-01-11 00:09:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-11 00:09:36,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:09:36,230 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:09:36,253 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 00:09:36,447 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,SelfDestructingSolverStorable3 [2022-01-11 00:09:36,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:09:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:09:36,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1918261480, now seen corresponding path program 2 times [2022-01-11 00:09:36,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:09:36,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987217876] [2022-01-11 00:09:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:09:36,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:09:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:09:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:09:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:09:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:09:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:09:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:09:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:36,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:09:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 49 proven. 108 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-01-11 00:09:37,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:09:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987217876] [2022-01-11 00:09:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987217876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:09:37,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587586731] [2022-01-11 00:09:37,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:09:37,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:09:37,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:09:37,006 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 00:09:37,007 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 00:09:37,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:09:37,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:09:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:09:37,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:09:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-01-11 00:09:38,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:09:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 42 proven. 95 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2022-01-11 00:09:39,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587586731] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:09:39,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:09:39,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 11] total 28 [2022-01-11 00:09:39,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350867283] [2022-01-11 00:09:39,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:09:39,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-11 00:09:39,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:09:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-11 00:09:39,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-11 00:09:39,562 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand has 28 states, 23 states have (on average 2.217391304347826) internal successors, (51), 27 states have internal predecessors, (51), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-11 00:09:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:09:40,566 INFO L93 Difference]: Finished difference Result 115 states and 272 transitions. [2022-01-11 00:09:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-11 00:09:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 2.217391304347826) internal successors, (51), 27 states have internal predecessors, (51), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) Word has length 83 [2022-01-11 00:09:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:09:40,569 INFO L225 Difference]: With dead ends: 115 [2022-01-11 00:09:40,569 INFO L226 Difference]: Without dead ends: 58 [2022-01-11 00:09:40,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 174 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=935, Unknown=0, NotChecked=0, Total=1190 [2022-01-11 00:09:40,574 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-11 00:09:40,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 129 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-11 00:09:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-11 00:09:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2022-01-11 00:09:40,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 8 states have return successors, (23), 11 states have call predecessors, (23), 7 states have call successors, (23) [2022-01-11 00:09:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2022-01-11 00:09:40,584 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 83 [2022-01-11 00:09:40,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:09:40,584 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2022-01-11 00:09:40,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 2.217391304347826) internal successors, (51), 27 states have internal predecessors, (51), 11 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2022-01-11 00:09:40,584 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2022-01-11 00:09:40,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-11 00:09:40,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:09:40,591 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:09:40,611 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 00:09:40,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:09:40,792 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:09:40,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:09:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1217827112, now seen corresponding path program 3 times [2022-01-11 00:09:40,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:09:40,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927734218] [2022-01-11 00:09:40,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:09:40,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:09:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:40,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:09:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:09:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:09:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:09:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:09:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:09:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:09:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-11 00:09:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:09:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:09:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:09:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:09:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:09:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:09:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:09:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-11 00:09:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:09:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 221 proven. 529 refuted. 0 times theorem prover too weak. 1400 trivial. 0 not checked. [2022-01-11 00:09:41,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:09:41,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927734218] [2022-01-11 00:09:41,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927734218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:09:41,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370195864] [2022-01-11 00:09:41,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 00:09:41,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:09:41,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:09:41,825 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 00:09:41,826 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 00:09:42,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-11 00:09:42,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:09:42,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-11 00:09:42,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:09:54,192 WARN L228 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 4485 DAG size of output: 3872 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)