/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:11:34,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:11:34,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:11:34,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 00:11:34,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 00:11:34,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 00:11:34,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 00:11:34,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 00:11:34,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 00:11:34,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 00:11:34,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 00:11:34,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 00:11:34,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:11:34,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:11:34,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:11:34,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:11:34,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:11:34,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:11:34,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:11:34,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:11:34,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:11:34,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:11:34,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:11:34,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:11:34,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 00:11:34,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:11:34,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:11:34,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:11:34,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-11 00:11:34,604 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:11:34,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:11:34,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:11:34,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:11:34,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:11:34,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:11:34,606 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:11:34,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:11:34,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:11:34,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:11:34,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:11:34,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:11:34,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:11:34,607 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:11:34,607 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:11:34,607 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:11:34,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:11:34,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:11:34,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:11:34,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:11:34,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:11:34,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:11:34,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:11:34,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:11:34,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:11:34,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:11:34,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:11:34,609 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:11:34,609 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:11:34,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:11:34,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:11:34,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:11:34,610 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:11:34,610 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:11:34,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:11:34,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:11:34,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:11:34,897 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:11:34,897 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:11:34,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2022-01-11 00:11:34,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911c26ba1/8045a07db18c4df19c9599c68e09dc15/FLAG34d1f0235 [2022-01-11 00:11:35,356 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:11:35,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2022-01-11 00:11:35,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911c26ba1/8045a07db18c4df19c9599c68e09dc15/FLAG34d1f0235 [2022-01-11 00:11:35,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911c26ba1/8045a07db18c4df19c9599c68e09dc15 [2022-01-11 00:11:35,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:11:35,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:11:35,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:11:35,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:11:35,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:11:35,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:11:35" (1/1) ... [2022-01-11 00:11:35,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@721e7104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:35, skipping insertion in model container [2022-01-11 00:11:35,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:11:35" (1/1) ... [2022-01-11 00:11:35,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:11:35,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:11:35,959 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c[949,962] [2022-01-11 00:11:35,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:11:36,003 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:11:36,023 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c[949,962] [2022-01-11 00:11:36,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:11:36,039 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:11:36,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36 WrapperNode [2022-01-11 00:11:36,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:11:36,042 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:11:36,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:11:36,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:11:36,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,071 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 00:11:36,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:11:36,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:11:36,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:11:36,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:11:36,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:11:36,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:11:36,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:11:36,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:11:36,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:11:36,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:36,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-11 00:11:36,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-11 00:11:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:11:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:11:36,173 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-11 00:11:36,173 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-11 00:11:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-11 00:11:36,174 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-11 00:11:36,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:11:36,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:11:36,224 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:11:36,226 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:11:36,335 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:11:36,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:11:36,341 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:11:36,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:11:36 BoogieIcfgContainer [2022-01-11 00:11:36,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:11:36,344 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:11:36,344 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:11:36,346 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:11:36,348 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:11:36" (1/1) ... [2022-01-11 00:11:36,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:11:36 BasicIcfg [2022-01-11 00:11:36,408 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:11:36,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:11:36,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:11:36,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:11:36,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:11:35" (1/4) ... [2022-01-11 00:11:36,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c7901a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:11:36, skipping insertion in model container [2022-01-11 00:11:36,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:11:36" (2/4) ... [2022-01-11 00:11:36,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c7901a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:11:36, skipping insertion in model container [2022-01-11 00:11:36,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:11:36" (3/4) ... [2022-01-11 00:11:36,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47c7901a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:11:36, skipping insertion in model container [2022-01-11 00:11:36,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:11:36" (4/4) ... [2022-01-11 00:11:36,415 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.cTransformedIcfg [2022-01-11 00:11:36,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:11:36,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:11:36,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:11:36,492 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-11 00:11:36,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:11:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-11 00:11:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:11:36,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:36,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:36,524 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-11 00:11:36,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:36,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131486576] [2022-01-11 00:11:36,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:36,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:36,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:11:36,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:36,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131486576] [2022-01-11 00:11:36,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131486576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:11:36,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:11:36,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:11:36,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335816549] [2022-01-11 00:11:36,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:11:36,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:11:36,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:11:36,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:11:36,888 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:11:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:36,951 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-11 00:11:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:11:36,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-11 00:11:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:36,963 INFO L225 Difference]: With dead ends: 41 [2022-01-11 00:11:36,963 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 00:11:36,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:11:36,974 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:36,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 118 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:11:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 00:11:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 00:11:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 00:11:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 00:11:37,025 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-11 00:11:37,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:37,025 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 00:11:37,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:11:37,026 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 00:11:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:11:37,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:37,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:11:37,028 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:37,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:37,028 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-11 00:11:37,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:37,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839362032] [2022-01-11 00:11:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:37,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:37,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:11:37,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:37,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839362032] [2022-01-11 00:11:37,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839362032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:11:37,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:11:37,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:11:37,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59641129] [2022-01-11 00:11:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:11:37,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:11:37,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:11:37,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:11:37,103 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:11:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:37,171 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-11 00:11:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:11:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-11 00:11:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:37,174 INFO L225 Difference]: With dead ends: 31 [2022-01-11 00:11:37,174 INFO L226 Difference]: Without dead ends: 27 [2022-01-11 00:11:37,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:11:37,175 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:37,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:11:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-11 00:11:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-11 00:11:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-11 00:11:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-11 00:11:37,183 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-11 00:11:37,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:37,200 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-11 00:11:37,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:11:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-11 00:11:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:11:37,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:37,201 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:37,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:11:37,202 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:37,202 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-11 00:11:37,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:37,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574447459] [2022-01-11 00:11:37,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:37,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:37,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:37,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:37,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:11:37,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:37,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574447459] [2022-01-11 00:11:37,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574447459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:37,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455650219] [2022-01-11 00:11:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:37,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:37,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:37,544 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:37,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 00:11:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:37,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:11:37,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:11:37,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 00:11:37,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455650219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:11:37,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 00:11:37,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-01-11 00:11:37,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215798999] [2022-01-11 00:11:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:11:37,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-11 00:11:37,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-11 00:11:37,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-11 00:11:37,997 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 00:11:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:38,042 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-01-11 00:11:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-11 00:11:38,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-11 00:11:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:38,044 INFO L225 Difference]: With dead ends: 38 [2022-01-11 00:11:38,044 INFO L226 Difference]: Without dead ends: 34 [2022-01-11 00:11:38,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-11 00:11:38,046 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:38,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 184 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:11:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-11 00:11:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-11 00:11:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 00:11:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-11 00:11:38,054 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-11 00:11:38,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:38,054 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-11 00:11:38,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 00:11:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-11 00:11:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 00:11:38,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:38,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:38,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 00:11:38,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:38,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1726490069, now seen corresponding path program 1 times [2022-01-11 00:11:38,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:38,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424602836] [2022-01-11 00:11:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:38,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:11:38,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:38,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424602836] [2022-01-11 00:11:38,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424602836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:11:38,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:11:38,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-11 00:11:38,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338788911] [2022-01-11 00:11:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:11:38,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 00:11:38,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 00:11:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-11 00:11:38,436 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 00:11:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:38,550 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2022-01-11 00:11:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:11:38,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-01-11 00:11:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:38,552 INFO L225 Difference]: With dead ends: 41 [2022-01-11 00:11:38,553 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 00:11:38,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-11 00:11:38,554 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:38,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 90 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:11:38,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 00:11:38,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-11 00:11:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-01-11 00:11:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2022-01-11 00:11:38,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 23 [2022-01-11 00:11:38,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:38,562 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2022-01-11 00:11:38,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-11 00:11:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2022-01-11 00:11:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-11 00:11:38,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:38,564 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:38,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-11 00:11:38,564 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash -312577904, now seen corresponding path program 1 times [2022-01-11 00:11:38,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:38,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768675023] [2022-01-11 00:11:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:38,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:11:38,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:38,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768675023] [2022-01-11 00:11:38,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768675023] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:38,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231348315] [2022-01-11 00:11:38,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:38,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:38,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:39,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:39,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 00:11:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:39,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 00:11:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-11 00:11:39,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 00:11:39,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231348315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:11:39,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-11 00:11:39,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2022-01-11 00:11:39,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656311387] [2022-01-11 00:11:39,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:11:39,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-11 00:11:39,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:39,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-11 00:11:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-11 00:11:39,397 INFO L87 Difference]: Start difference. First operand 32 states and 47 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:11:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:39,428 INFO L93 Difference]: Finished difference Result 50 states and 78 transitions. [2022-01-11 00:11:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 00:11:39,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-01-11 00:11:39,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:39,430 INFO L225 Difference]: With dead ends: 50 [2022-01-11 00:11:39,430 INFO L226 Difference]: Without dead ends: 46 [2022-01-11 00:11:39,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-01-11 00:11:39,431 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:39,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 192 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:11:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-11 00:11:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-01-11 00:11:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-11 00:11:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2022-01-11 00:11:39,441 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 34 [2022-01-11 00:11:39,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:39,442 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2022-01-11 00:11:39,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:11:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2022-01-11 00:11:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 00:11:39,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:39,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:39,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 00:11:39,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:39,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 176289166, now seen corresponding path program 1 times [2022-01-11 00:11:39,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:39,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217281607] [2022-01-11 00:11:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:39,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:39,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:39,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:39,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:39,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:11:39,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:39,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217281607] [2022-01-11 00:11:39,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217281607] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:39,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306736011] [2022-01-11 00:11:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:39,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:39,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:39,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:39,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 00:11:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:11:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 00:11:40,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:11:40,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306736011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:40,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:40,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 22 [2022-01-11 00:11:40,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107829916] [2022-01-11 00:11:40,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:40,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-11 00:11:40,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-11 00:11:40,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-11 00:11:40,824 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-11 00:11:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:41,431 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2022-01-11 00:11:41,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-11 00:11:41,432 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) Word has length 35 [2022-01-11 00:11:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:41,433 INFO L225 Difference]: With dead ends: 99 [2022-01-11 00:11:41,433 INFO L226 Difference]: Without dead ends: 65 [2022-01-11 00:11:41,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-01-11 00:11:41,436 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:41,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 312 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 00:11:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-11 00:11:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2022-01-11 00:11:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 11 states have return successors, (41), 15 states have call predecessors, (41), 9 states have call successors, (41) [2022-01-11 00:11:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 84 transitions. [2022-01-11 00:11:41,452 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 84 transitions. Word has length 35 [2022-01-11 00:11:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:41,452 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 84 transitions. [2022-01-11 00:11:41,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (15), 10 states have call predecessors, (15), 9 states have call successors, (15) [2022-01-11 00:11:41,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 84 transitions. [2022-01-11 00:11:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-11 00:11:41,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:41,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:41,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 00:11:41,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:41,656 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:41,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1759393138, now seen corresponding path program 2 times [2022-01-11 00:11:41,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:41,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150652664] [2022-01-11 00:11:41,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:41,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:41,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:41,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:41,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:41,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 00:11:41,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:41,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150652664] [2022-01-11 00:11:41,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150652664] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:41,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268908800] [2022-01-11 00:11:41,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:11:41,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:41,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:41,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:41,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 00:11:41,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:11:41,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:11:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:11:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-11 00:11:42,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:11:42,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268908800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:42,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:42,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-11 00:11:42,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079705184] [2022-01-11 00:11:42,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:42,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-11 00:11:42,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:42,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-11 00:11:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-11 00:11:42,772 INFO L87 Difference]: Start difference. First operand 51 states and 84 transitions. Second operand has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-11 00:11:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:43,312 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2022-01-11 00:11:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-11 00:11:43,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 35 [2022-01-11 00:11:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:43,316 INFO L225 Difference]: With dead ends: 141 [2022-01-11 00:11:43,316 INFO L226 Difference]: Without dead ends: 74 [2022-01-11 00:11:43,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-11 00:11:43,320 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 34 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:43,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 231 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-11 00:11:43,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-11 00:11:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2022-01-11 00:11:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 11 states have call successors, (11), 4 states have call predecessors, (11), 14 states have return successors, (48), 18 states have call predecessors, (48), 11 states have call successors, (48) [2022-01-11 00:11:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 103 transitions. [2022-01-11 00:11:43,328 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 103 transitions. Word has length 35 [2022-01-11 00:11:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:43,328 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 103 transitions. [2022-01-11 00:11:43,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-11 00:11:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 103 transitions. [2022-01-11 00:11:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-11 00:11:43,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:43,330 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:43,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-11 00:11:43,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:43,555 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 94684969, now seen corresponding path program 1 times [2022-01-11 00:11:43,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213930909] [2022-01-11 00:11:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:43,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:11:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:11:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 00:11:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:11:43,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:43,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213930909] [2022-01-11 00:11:43,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213930909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:43,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312923378] [2022-01-11 00:11:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:43,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:43,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:43,769 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 00:11:43,772 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 00:11:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:43,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:11:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:11:43,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:11:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-11 00:11:44,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312923378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:11:44,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:11:44,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-11 00:11:44,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166223838] [2022-01-11 00:11:44,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:11:44,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-11 00:11:44,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:11:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-11 00:11:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-11 00:11:44,464 INFO L87 Difference]: Start difference. First operand 65 states and 103 transitions. Second operand has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:11:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:11:44,794 INFO L93 Difference]: Finished difference Result 154 states and 294 transitions. [2022-01-11 00:11:44,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 00:11:44,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 47 [2022-01-11 00:11:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:11:44,796 INFO L225 Difference]: With dead ends: 154 [2022-01-11 00:11:44,797 INFO L226 Difference]: Without dead ends: 89 [2022-01-11 00:11:44,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-11 00:11:44,798 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-11 00:11:44,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 237 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-11 00:11:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-11 00:11:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-01-11 00:11:44,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 14 states have call successors, (14), 5 states have call predecessors, (14), 17 states have return successors, (66), 23 states have call predecessors, (66), 14 states have call successors, (66) [2022-01-11 00:11:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 135 transitions. [2022-01-11 00:11:44,809 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 135 transitions. Word has length 47 [2022-01-11 00:11:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:11:44,809 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 135 transitions. [2022-01-11 00:11:44,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.0) internal successors, (45), 17 states have internal predecessors, (45), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:11:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 135 transitions. [2022-01-11 00:11:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-11 00:11:44,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:11:44,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:11:44,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-11 00:11:45,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:45,025 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:11:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:11:45,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1359840148, now seen corresponding path program 1 times [2022-01-11 00:11:45,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:11:45,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171289610] [2022-01-11 00:11:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:45,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:11:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:11:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:11:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:11:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:11:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 00:11:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-11 00:11:45,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:11:45,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171289610] [2022-01-11 00:11:45,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171289610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:11:45,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330922248] [2022-01-11 00:11:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:11:45,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:11:45,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:11:45,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-11 00:11:45,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 00:11:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:11:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-11 00:11:45,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:11:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-11 00:11:45,793 INFO L328 TraceCheckSpWp]: Computing backward predicates...