/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/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 02:03:32,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 02:03:32,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 02:03:32,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 02:03:32,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 02:03:32,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 02:03:32,944 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 02:03:32,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 02:03:32,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 02:03:32,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 02:03:32,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 02:03:32,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 02:03:32,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 02:03:32,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 02:03:32,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 02:03:32,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 02:03:32,952 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 02:03:32,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 02:03:32,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 02:03:32,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 02:03:32,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 02:03:32,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-11 02:03:32,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-11 02:03:32,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-11 02:03:32,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-11 02:03:32,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-11 02:03:32,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-11 02:03:32,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-11 02:03:32,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-11 02:03:32,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-11 02:03:32,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 02:03:32,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 02:03:32,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 02:03:32,958 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 02:03:32,984 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 02:03:32,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 02:03:32,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 02:03:32,989 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 02:03:32,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 02:03:32,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 02:03:32,990 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 02:03:32,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 02:03:32,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 02:03:32,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 02:03:32,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 02:03:32,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 02:03:32,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 02:03:32,990 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 02:03:32,991 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 02:03:32,991 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 02:03:32,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 02:03:32,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 02:03:32,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 02:03:32,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 02:03:32,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 02:03:32,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:03:32,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 02:03:32,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 02:03:32,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 02:03:32,992 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 02:03:32,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 02:03:32,992 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 02:03:32,992 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 02:03:32,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 02:03:32,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 02:03:32,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 02:03:32,993 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 02:03:32,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 02:03:33,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 02:03:33,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 02:03:33,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 02:03:33,191 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 02:03:33,192 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 02:03:33,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2022-01-11 02:03:33,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc48bbaa/54d6aa7637954cf9a1af416318efcc00/FLAG4bd156e4e [2022-01-11 02:03:33,590 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 02:03:33,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2022-01-11 02:03:33,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc48bbaa/54d6aa7637954cf9a1af416318efcc00/FLAG4bd156e4e [2022-01-11 02:03:34,036 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fc48bbaa/54d6aa7637954cf9a1af416318efcc00 [2022-01-11 02:03:34,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 02:03:34,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 02:03:34,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 02:03:34,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 02:03:34,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 02:03:34,057 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,058 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21cf472a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34, skipping insertion in model container [2022-01-11 02:03:34,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 02:03:34,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 02:03:34,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i[893,906] [2022-01-11 02:03:34,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:03:34,210 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 02:03:34,217 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i[893,906] [2022-01-11 02:03:34,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 02:03:34,228 INFO L208 MainTranslator]: Completed translation [2022-01-11 02:03:34,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34 WrapperNode [2022-01-11 02:03:34,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 02:03:34,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 02:03:34,229 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 02:03:34,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 02:03:34,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,247 INFO L137 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2022-01-11 02:03:34,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 02:03:34,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 02:03:34,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 02:03:34,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 02:03:34,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 02:03:34,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 02:03:34,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 02:03:34,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 02:03:34,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 02:03:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:03:34,304 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 02:03:34,318 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 02:03:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 02:03:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 02:03:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 02:03:34,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 02:03:34,379 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 02:03:34,380 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 02:03:34,485 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 02:03:34,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 02:03:34,488 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-11 02:03:34,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:03:34 BoogieIcfgContainer [2022-01-11 02:03:34,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 02:03:34,490 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 02:03:34,490 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 02:03:34,491 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 02:03:34,493 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:03:34" (1/1) ... [2022-01-11 02:03:34,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:03:34 BasicIcfg [2022-01-11 02:03:34,532 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 02:03:34,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 02:03:34,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 02:03:34,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 02:03:34,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 02:03:34" (1/4) ... [2022-01-11 02:03:34,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:03:34, skipping insertion in model container [2022-01-11 02:03:34,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 02:03:34" (2/4) ... [2022-01-11 02:03:34,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 02:03:34, skipping insertion in model container [2022-01-11 02:03:34,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 02:03:34" (3/4) ... [2022-01-11 02:03:34,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71b0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 02:03:34, skipping insertion in model container [2022-01-11 02:03:34,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 02:03:34" (4/4) ... [2022-01-11 02:03:34,537 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.iTransformedIcfg [2022-01-11 02:03:34,540 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 02:03:34,540 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-01-11 02:03:34,565 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 02:03:34,569 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 02:03:34,570 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-11 02:03:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 02:03:34,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:34,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:34,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash -104049936, now seen corresponding path program 1 times [2022-01-11 02:03:34,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:34,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761304132] [2022-01-11 02:03:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:34,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:34,766 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 02:03:34,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:34,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761304132] [2022-01-11 02:03:34,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761304132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:03:34,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:03:34,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 02:03:34,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528229746] [2022-01-11 02:03:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:03:34,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 02:03:34,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 02:03:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 02:03:34,797 INFO L87 Difference]: Start difference. First operand has 28 states, 24 states have (on average 1.625) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:34,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:34,927 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2022-01-11 02:03:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 02:03:34,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-11 02:03:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:34,935 INFO L225 Difference]: With dead ends: 84 [2022-01-11 02:03:34,935 INFO L226 Difference]: Without dead ends: 45 [2022-01-11 02:03:34,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 02:03:34,939 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:34,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 79 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:03:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-11 02:03:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2022-01-11 02:03:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-11 02:03:34,962 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 10 [2022-01-11 02:03:34,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:34,962 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-11 02:03:34,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-11 02:03:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 02:03:34,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:34,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:34,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 02:03:34,963 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:34,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1069388591, now seen corresponding path program 1 times [2022-01-11 02:03:34,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:34,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000442264] [2022-01-11 02:03:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:34,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:35,094 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 02:03:35,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:35,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000442264] [2022-01-11 02:03:35,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000442264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:03:35,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:03:35,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 02:03:35,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141096377] [2022-01-11 02:03:35,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:03:35,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 02:03:35,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:35,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 02:03:35,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-11 02:03:35,097 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:35,321 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2022-01-11 02:03:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 02:03:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-11 02:03:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:35,327 INFO L225 Difference]: With dead ends: 114 [2022-01-11 02:03:35,327 INFO L226 Difference]: Without dead ends: 112 [2022-01-11 02:03:35,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-11 02:03:35,331 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 88 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:35,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 139 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:03:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-11 02:03:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 38. [2022-01-11 02:03:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-01-11 02:03:35,343 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 11 [2022-01-11 02:03:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:35,343 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-01-11 02:03:35,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-01-11 02:03:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 02:03:35,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:35,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:35,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 02:03:35,344 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:35,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1207704876, now seen corresponding path program 1 times [2022-01-11 02:03:35,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:35,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865567283] [2022-01-11 02:03:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:35,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:35,497 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 02:03:35,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:35,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865567283] [2022-01-11 02:03:35,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865567283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:03:35,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:03:35,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 02:03:35,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635613901] [2022-01-11 02:03:35,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:03:35,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 02:03:35,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 02:03:35,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 02:03:35,499 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:35,574 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-01-11 02:03:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 02:03:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-11 02:03:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:35,576 INFO L225 Difference]: With dead ends: 50 [2022-01-11 02:03:35,577 INFO L226 Difference]: Without dead ends: 48 [2022-01-11 02:03:35,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-11 02:03:35,582 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:35,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 48 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:03:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-11 02:03:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-01-11 02:03:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-01-11 02:03:35,598 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 12 [2022-01-11 02:03:35,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:35,598 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-01-11 02:03:35,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-01-11 02:03:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-11 02:03:35,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:35,599 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:35,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 02:03:35,599 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:35,601 INFO L85 PathProgramCache]: Analyzing trace with hash -514403498, now seen corresponding path program 1 times [2022-01-11 02:03:35,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:35,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830372552] [2022-01-11 02:03:35,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:35,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 02:03:35,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830372552] [2022-01-11 02:03:35,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830372552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:03:35,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:03:35,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 02:03:35,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236830117] [2022-01-11 02:03:35,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:03:35,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 02:03:35,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 02:03:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 02:03:35,672 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:35,898 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2022-01-11 02:03:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 02:03:35,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-11 02:03:35,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:35,899 INFO L225 Difference]: With dead ends: 101 [2022-01-11 02:03:35,900 INFO L226 Difference]: Without dead ends: 99 [2022-01-11 02:03:35,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-11 02:03:35,906 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:35,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 94 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 02:03:35,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-11 02:03:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 39. [2022-01-11 02:03:35,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-01-11 02:03:35,924 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 14 [2022-01-11 02:03:35,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:35,925 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-01-11 02:03:35,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:35,925 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-01-11 02:03:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-11 02:03:35,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:35,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:35,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 02:03:35,926 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:35,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1941774442, now seen corresponding path program 1 times [2022-01-11 02:03:35,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:35,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825094555] [2022-01-11 02:03:35,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:35,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:35,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:35,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825094555] [2022-01-11 02:03:35,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825094555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:03:35,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:03:35,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 02:03:35,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256919504] [2022-01-11 02:03:35,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:03:35,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 02:03:35,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:35,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 02:03:35,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 02:03:35,996 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:36,047 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2022-01-11 02:03:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 02:03:36,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-11 02:03:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:36,048 INFO L225 Difference]: With dead ends: 52 [2022-01-11 02:03:36,048 INFO L226 Difference]: Without dead ends: 50 [2022-01-11 02:03:36,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 02:03:36,048 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:36,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:03:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-11 02:03:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2022-01-11 02:03:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-01-11 02:03:36,062 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 14 [2022-01-11 02:03:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:36,063 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-01-11 02:03:36,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-01-11 02:03:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 02:03:36,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:36,070 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:36,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-11 02:03:36,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:36,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:36,071 INFO L85 PathProgramCache]: Analyzing trace with hash -65496247, now seen corresponding path program 1 times [2022-01-11 02:03:36,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:36,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561544981] [2022-01-11 02:03:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:36,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:36,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:36,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561544981] [2022-01-11 02:03:36,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561544981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:03:36,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 02:03:36,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 02:03:36,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16971851] [2022-01-11 02:03:36,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:03:36,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 02:03:36,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 02:03:36,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 02:03:36,157 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:36,256 INFO L93 Difference]: Finished difference Result 112 states and 141 transitions. [2022-01-11 02:03:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 02:03:36,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-11 02:03:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:36,257 INFO L225 Difference]: With dead ends: 112 [2022-01-11 02:03:36,257 INFO L226 Difference]: Without dead ends: 80 [2022-01-11 02:03:36,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-11 02:03:36,259 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:36,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 56 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:03:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-11 02:03:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 41. [2022-01-11 02:03:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:36,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-01-11 02:03:36,274 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 15 [2022-01-11 02:03:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:36,274 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-01-11 02:03:36,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-01-11 02:03:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 02:03:36,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:36,275 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:36,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-11 02:03:36,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash 895501831, now seen corresponding path program 1 times [2022-01-11 02:03:36,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:36,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712849706] [2022-01-11 02:03:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:36,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:36,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:36,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712849706] [2022-01-11 02:03:36,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712849706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:03:36,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039086518] [2022-01-11 02:03:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:36,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:03:36,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:03:36,392 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 02:03:36,393 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 02:03:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:36,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 02:03:36,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:03:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:36,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:03:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:38,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039086518] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:03:38,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:03:38,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 16 [2022-01-11 02:03:38,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033034566] [2022-01-11 02:03:38,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:03:38,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-11 02:03:38,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-11 02:03:38,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-11 02:03:38,509 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:40,941 INFO L93 Difference]: Finished difference Result 173 states and 217 transitions. [2022-01-11 02:03:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-11 02:03:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-11 02:03:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:40,943 INFO L225 Difference]: With dead ends: 173 [2022-01-11 02:03:40,943 INFO L226 Difference]: Without dead ends: 171 [2022-01-11 02:03:40,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2022-01-11 02:03:40,944 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 341 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:40,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 135 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-11 02:03:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-11 02:03:40,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 41. [2022-01-11 02:03:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2022-01-11 02:03:40,969 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 15 [2022-01-11 02:03:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:40,969 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2022-01-11 02:03:40,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2022-01-11 02:03:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 02:03:40,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:40,970 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:40,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 02:03:41,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:03:41,183 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:41,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:41,184 INFO L85 PathProgramCache]: Analyzing trace with hash 465342101, now seen corresponding path program 1 times [2022-01-11 02:03:41,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:41,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305205962] [2022-01-11 02:03:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:41,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:41,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:41,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305205962] [2022-01-11 02:03:41,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305205962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:03:41,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400550243] [2022-01-11 02:03:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:41,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:03:41,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:03:41,300 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 02:03:41,308 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 02:03:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:41,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-11 02:03:41,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:03:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:41,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:03:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:41,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400550243] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:03:41,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:03:41,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 17 [2022-01-11 02:03:41,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734118252] [2022-01-11 02:03:41,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:03:41,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-11 02:03:41,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:41,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-11 02:03:41,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-11 02:03:41,903 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:43,410 INFO L93 Difference]: Finished difference Result 158 states and 196 transitions. [2022-01-11 02:03:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-11 02:03:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-11 02:03:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:43,415 INFO L225 Difference]: With dead ends: 158 [2022-01-11 02:03:43,415 INFO L226 Difference]: Without dead ends: 156 [2022-01-11 02:03:43,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=444, Invalid=1196, Unknown=0, NotChecked=0, Total=1640 [2022-01-11 02:03:43,416 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 319 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:43,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 107 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 02:03:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-11 02:03:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 33. [2022-01-11 02:03:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:43,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-11 02:03:43,436 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 18 [2022-01-11 02:03:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:43,436 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-11 02:03:43,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-11 02:03:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-11 02:03:43,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:43,440 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:43,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-11 02:03:43,642 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,SelfDestructingSolverStorable7 [2022-01-11 02:03:43,642 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:43,643 INFO L85 PathProgramCache]: Analyzing trace with hash -170053086, now seen corresponding path program 1 times [2022-01-11 02:03:43,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:43,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394606772] [2022-01-11 02:03:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:43,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:43,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:43,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394606772] [2022-01-11 02:03:43,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394606772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:03:43,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383495323] [2022-01-11 02:03:43,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:43,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:03:43,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:03:43,800 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 02:03:43,819 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 02:03:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-11 02:03:43,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:03:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:44,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 02:03:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:44,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383495323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 02:03:44,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 02:03:44,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-01-11 02:03:44,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306807929] [2022-01-11 02:03:44,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 02:03:44,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 02:03:44,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:44,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 02:03:44,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-01-11 02:03:44,282 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:45,722 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2022-01-11 02:03:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-11 02:03:45,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-11 02:03:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:45,723 INFO L225 Difference]: With dead ends: 138 [2022-01-11 02:03:45,723 INFO L226 Difference]: Without dead ends: 123 [2022-01-11 02:03:45,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2022-01-11 02:03:45,726 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:45,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 175 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 02:03:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-11 02:03:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 50. [2022-01-11 02:03:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-01-11 02:03:45,756 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2022-01-11 02:03:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:45,756 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-01-11 02:03:45,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-01-11 02:03:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 02:03:45,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:45,757 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:45,775 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 02:03:45,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:03:45,963 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2017333844, now seen corresponding path program 1 times [2022-01-11 02:03:45,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:45,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418746098] [2022-01-11 02:03:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:45,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:45,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 02:03:46,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:46,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418746098] [2022-01-11 02:03:46,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418746098] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:03:46,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146816539] [2022-01-11 02:03:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:46,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:03:46,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:03:46,062 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 02:03:46,063 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 02:03:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:46,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-11 02:03:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 02:03:46,204 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:46,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 02:03:46,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146816539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 02:03:46,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 02:03:46,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-01-11 02:03:46,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153163697] [2022-01-11 02:03:46,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 02:03:46,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 02:03:46,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 02:03:46,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 02:03:46,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-11 02:03:46,206 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:46,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 02:03:46,275 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-01-11 02:03:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 02:03:46,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-11 02:03:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 02:03:46,277 INFO L225 Difference]: With dead ends: 72 [2022-01-11 02:03:46,277 INFO L226 Difference]: Without dead ends: 50 [2022-01-11 02:03:46,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-11 02:03:46,278 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 02:03:46,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 02:03:46,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-11 02:03:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-01-11 02:03:46,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-01-11 02:03:46,307 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 23 [2022-01-11 02:03:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 02:03:46,307 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-01-11 02:03:46,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 02:03:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-01-11 02:03:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-11 02:03:46,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 02:03:46,309 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 02:03:46,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 02:03:46,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:03:46,519 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 02:03:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 02:03:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash -267723150, now seen corresponding path program 2 times [2022-01-11 02:03:46,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 02:03:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427015647] [2022-01-11 02:03:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 02:03:46,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 02:03:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 02:03:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 02:03:46,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 02:03:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427015647] [2022-01-11 02:03:46,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427015647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 02:03:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181504135] [2022-01-11 02:03:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 02:03:46,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 02:03:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 02:03:46,747 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 02:03:46,748 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 02:03:46,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 02:03:46,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 02:03:46,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-11 02:03:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates...