/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sum40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:46:26,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:46:26,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:46:26,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 03:46:26,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 03:46:26,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 03:46:26,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 03:46:26,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 03:46:26,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 03:46:26,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 03:46:26,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 03:46:26,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 03:46:26,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:46:26,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:46:26,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:46:26,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:46:26,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:46:26,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:46:26,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:46:26,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:46:26,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:46:26,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:46:26,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:46:26,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:46:26,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 03:46:26,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 03:46:26,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 03:46:26,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 03:46:26,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 03:46:26,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 03:46:26,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 03:46:26,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 03:46:26,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 03:46:26,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 03:46:26,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 03:46:26,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 03:46:26,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 03:46:26,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 03:46:26,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:46:26,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:46:26,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:46:26,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:46:26,377 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:46:26,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:46:26,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:46:26,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:46:26,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:46:26,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:46:26,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:46:26,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:46:26,379 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:46:26,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:46:26,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:46:26,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:46:26,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:46:26,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:46:26,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:46:26,381 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:46:26,381 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:46:26,381 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:46:26,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:46:26,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:46:26,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:46:26,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:46:26,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:46:26,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:46:26,383 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:46:26,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:46:26,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:46:26,384 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:46:26,384 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:46:26,384 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:46:26,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:46:26,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:46:26,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:46:26,384 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:46:26,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:46:26,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:46:26,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:46:26,590 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:46:26,590 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:46:26,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum40-2.i [2022-01-10 03:46:26,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae5c2b7d8/371fb83a274a4781a115a4a19014b1bb/FLAG39f774f63 [2022-01-10 03:46:27,001 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:46:27,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum40-2.i [2022-01-10 03:46:27,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae5c2b7d8/371fb83a274a4781a115a4a19014b1bb/FLAG39f774f63 [2022-01-10 03:46:27,017 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae5c2b7d8/371fb83a274a4781a115a4a19014b1bb [2022-01-10 03:46:27,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:46:27,020 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:46:27,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:46:27,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:46:27,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:46:27,025 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e3caec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27, skipping insertion in model container [2022-01-10 03:46:27,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:46:27,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:46:27,183 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum40-2.i[1277,1290] [2022-01-10 03:46:27,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:46:27,193 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:46:27,212 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum40-2.i[1277,1290] [2022-01-10 03:46:27,213 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:46:27,223 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:46:27,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27 WrapperNode [2022-01-10 03:46:27,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:46:27,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:46:27,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:46:27,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:46:27,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,256 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 63 [2022-01-10 03:46:27,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:46:27,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:46:27,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:46:27,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:46:27,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:46:27,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:46:27,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:46:27,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:46:27,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (1/1) ... [2022-01-10 03:46:27,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:46:27,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:46:27,335 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) [2022-01-10 03:46:27,343 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 [2022-01-10 03:46:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:46:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:46:27,372 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-01-10 03:46:27,372 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-01-10 03:46:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:46:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:46:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:46:27,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:46:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:46:27,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:46:27,427 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:46:27,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:46:27,577 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:46:27,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:46:27,582 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 03:46:27,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:46:27 BoogieIcfgContainer [2022-01-10 03:46:27,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:46:27,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:46:27,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:46:27,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:46:27,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:46:27" (1/3) ... [2022-01-10 03:46:27,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@defda45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:46:27, skipping insertion in model container [2022-01-10 03:46:27,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:46:27" (2/3) ... [2022-01-10 03:46:27,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@defda45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:46:27, skipping insertion in model container [2022-01-10 03:46:27,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:46:27" (3/3) ... [2022-01-10 03:46:27,590 INFO L111 eAbstractionObserver]: Analyzing ICFG sum40-2.i [2022-01-10 03:46:27,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:46:27,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:46:27,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:46:27,635 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 [2022-01-10 03:46:27,635 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:46:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:27,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 03:46:27,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:27,656 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:27,662 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-01-10 03:46:27,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:27,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016011904] [2022-01-10 03:46:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:46:27,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:27,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:27,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:27,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:46:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:46:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:46:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:46:27,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:46:27,912 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016011904] [2022-01-10 03:46:27,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016011904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:46:27,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:46:27,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:46:27,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403763553] [2022-01-10 03:46:27,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:46:27,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:46:27,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:46:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:46:27,954 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:46:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:27,996 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-01-10 03:46:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:46:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-10 03:46:28,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:28,014 INFO L225 Difference]: With dead ends: 50 [2022-01-10 03:46:28,014 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 03:46:28,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:46:28,022 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:28,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:46:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 03:46:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-10 03:46:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-10 03:46:28,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-01-10 03:46:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:28,067 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-10 03:46:28,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:46:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-10 03:46:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 03:46:28,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:28,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:28,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:28,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:28,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-01-10 03:46:28,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:28,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [45249657] [2022-01-10 03:46:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:46:28,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:28,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:28,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:46:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:46:28,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:46:28,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:46:28,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 03:46:28,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [45249657] [2022-01-10 03:46:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [45249657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:28,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:28,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:46:28,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838108675] [2022-01-10 03:46:28,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:28,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:46:28,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:46:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:46:28,537 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:46:28,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:28,601 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2022-01-10 03:46:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:46:28,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2022-01-10 03:46:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:28,604 INFO L225 Difference]: With dead ends: 47 [2022-01-10 03:46:28,604 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 03:46:28,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:46:28,608 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:28,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:46:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 03:46:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 03:46:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-10 03:46:28,626 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 30 [2022-01-10 03:46:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:28,626 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-10 03:46:28,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:46:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-10 03:46:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 03:46:28,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:28,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:28,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:28,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:28,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:28,829 INFO L85 PathProgramCache]: Analyzing trace with hash -510178173, now seen corresponding path program 2 times [2022-01-10 03:46:28,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704872209] [2022-01-10 03:46:28,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:46:28,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:28,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:28,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:28,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:46:28,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:46:28,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:28,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:46:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 03:46:28,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:46:28,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:28,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704872209] [2022-01-10 03:46:28,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704872209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:46:28,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:46:28,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:46:28,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828847986] [2022-01-10 03:46:28,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:46:28,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:46:28,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:28,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:46:28,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:46:28,954 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:46:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:28,980 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-10 03:46:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:46:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-01-10 03:46:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:28,982 INFO L225 Difference]: With dead ends: 48 [2022-01-10 03:46:28,982 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 03:46:28,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:46:28,983 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:28,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:46:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 03:46:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-10 03:46:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-10 03:46:28,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 36 [2022-01-10 03:46:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:28,989 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-10 03:46:28,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 03:46:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-10 03:46:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 03:46:28,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:28,990 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:29,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:29,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:29,190 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:29,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1408749695, now seen corresponding path program 1 times [2022-01-10 03:46:29,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:29,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826842815] [2022-01-10 03:46:29,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:46:29,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:29,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:29,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:29,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:46:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:46:29,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:46:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:46:29,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:46:29,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:29,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826842815] [2022-01-10 03:46:29,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826842815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:29,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:29,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:46:29,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723589096] [2022-01-10 03:46:29,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:29,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:46:29,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:46:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:46:29,560 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:46:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:29,797 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-01-10 03:46:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:46:29,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2022-01-10 03:46:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:29,801 INFO L225 Difference]: With dead ends: 61 [2022-01-10 03:46:29,801 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 03:46:29,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:46:29,802 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:29,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:46:29,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 03:46:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-10 03:46:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:29,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-10 03:46:29,814 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 42 [2022-01-10 03:46:29,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:29,814 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-10 03:46:29,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:46:29,814 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-10 03:46:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 03:46:29,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:29,818 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:29,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:30,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:30,027 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash -788828403, now seen corresponding path program 2 times [2022-01-10 03:46:30,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:30,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709033811] [2022-01-10 03:46:30,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:46:30,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:30,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:30,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:30,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:46:30,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:46:30,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:30,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:46:30,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:46:30,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 03:46:30,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:30,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709033811] [2022-01-10 03:46:30,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709033811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:30,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:30,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:46:30,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469290152] [2022-01-10 03:46:30,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:30,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:46:30,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:30,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:46:30,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:46:30,846 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:46:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:31,794 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-01-10 03:46:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:46:31,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 54 [2022-01-10 03:46:31,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:31,796 INFO L225 Difference]: With dead ends: 85 [2022-01-10 03:46:31,796 INFO L226 Difference]: Without dead ends: 66 [2022-01-10 03:46:31,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 03:46:31,798 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:31,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 354 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:46:31,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-10 03:46:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-01-10 03:46:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-01-10 03:46:31,809 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2022-01-10 03:46:31,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:31,809 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-01-10 03:46:31,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:46:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-01-10 03:46:31,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 03:46:31,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:31,811 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:31,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:32,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:32,021 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:32,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:32,021 INFO L85 PathProgramCache]: Analyzing trace with hash 956307493, now seen corresponding path program 3 times [2022-01-10 03:46:32,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359345551] [2022-01-10 03:46:32,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:46:32,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:32,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:32,023 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:32,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:46:32,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 03:46:32,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:32,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:46:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-01-10 03:46:32,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:46:32,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:32,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359345551] [2022-01-10 03:46:32,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359345551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:46:32,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:46:32,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:46:32,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094102286] [2022-01-10 03:46:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:46:32,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:46:32,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:32,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:46:32,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:46:32,216 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:46:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:32,239 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-01-10 03:46:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:46:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 78 [2022-01-10 03:46:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:32,242 INFO L225 Difference]: With dead ends: 81 [2022-01-10 03:46:32,242 INFO L226 Difference]: Without dead ends: 68 [2022-01-10 03:46:32,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:46:32,243 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:32,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:46:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-10 03:46:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-01-10 03:46:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:32,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-01-10 03:46:32,251 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 78 [2022-01-10 03:46:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:32,252 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-01-10 03:46:32,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 03:46:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-01-10 03:46:32,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 03:46:32,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:32,253 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:32,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:32,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:32,460 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1264826685, now seen corresponding path program 1 times [2022-01-10 03:46:32,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:32,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546308786] [2022-01-10 03:46:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:46:32,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:32,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:32,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:32,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:46:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:46:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:46:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 03:46:33,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 03:46:34,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:34,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546308786] [2022-01-10 03:46:34,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546308786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:34,327 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:34,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 03:46:34,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791190383] [2022-01-10 03:46:34,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:34,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 03:46:34,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 03:46:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=1649, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 03:46:34,330 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 48 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:46:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:37,110 INFO L93 Difference]: Finished difference Result 123 states and 148 transitions. [2022-01-10 03:46:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-10 03:46:37,116 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 80 [2022-01-10 03:46:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:37,118 INFO L225 Difference]: With dead ends: 123 [2022-01-10 03:46:37,118 INFO L226 Difference]: Without dead ends: 103 [2022-01-10 03:46:37,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1279, Invalid=2753, Unknown=0, NotChecked=0, Total=4032 [2022-01-10 03:46:37,125 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:37,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 596 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 03:46:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-10 03:46:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-01-10 03:46:37,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-01-10 03:46:37,147 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 80 [2022-01-10 03:46:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:37,150 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-01-10 03:46:37,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 03:46:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-01-10 03:46:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-10 03:46:37,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:37,157 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:37,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:37,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:37,358 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1963234407, now seen corresponding path program 2 times [2022-01-10 03:46:37,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963677633] [2022-01-10 03:46:37,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:46:37,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:37,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:37,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:37,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 03:46:37,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:46:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:37,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:46:37,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1618 trivial. 0 not checked. [2022-01-10 03:46:37,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1631 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1614 trivial. 0 not checked. [2022-01-10 03:46:37,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963677633] [2022-01-10 03:46:37,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963677633] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:37,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:37,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:46:37,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064444232] [2022-01-10 03:46:37,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:37,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:46:37,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:46:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:46:37,843 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:46:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:37,880 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2022-01-10 03:46:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:46:37,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 116 [2022-01-10 03:46:37,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:37,881 INFO L225 Difference]: With dead ends: 128 [2022-01-10 03:46:37,882 INFO L226 Difference]: Without dead ends: 109 [2022-01-10 03:46:37,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:46:37,883 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:37,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:46:37,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-10 03:46:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-01-10 03:46:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2022-01-10 03:46:37,903 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 116 [2022-01-10 03:46:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:37,904 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2022-01-10 03:46:37,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:46:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2022-01-10 03:46:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 03:46:37,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:37,905 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:37,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 03:46:38,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:38,118 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash -525310495, now seen corresponding path program 3 times [2022-01-10 03:46:38,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:38,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154038653] [2022-01-10 03:46:38,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:46:38,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:38,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:38,120 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:38,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 03:46:38,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 03:46:38,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:38,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:46:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1784 backedges. 90 proven. 1 refuted. 0 times theorem prover too weak. 1693 trivial. 0 not checked. [2022-01-10 03:46:38,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1784 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1783 trivial. 0 not checked. [2022-01-10 03:46:38,537 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:38,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154038653] [2022-01-10 03:46:38,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154038653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:38,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:38,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:46:38,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509997822] [2022-01-10 03:46:38,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:38,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:46:38,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:46:38,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:46:38,538 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:46:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:38,591 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-01-10 03:46:38,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:46:38,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 134 [2022-01-10 03:46:38,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:38,595 INFO L225 Difference]: With dead ends: 134 [2022-01-10 03:46:38,595 INFO L226 Difference]: Without dead ends: 115 [2022-01-10 03:46:38,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:46:38,596 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:38,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 66 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:46:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-10 03:46:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-01-10 03:46:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-01-10 03:46:38,605 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 134 [2022-01-10 03:46:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:38,605 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-01-10 03:46:38,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:46:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-01-10 03:46:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-10 03:46:38,606 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:38,606 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:38,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:38,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:38,819 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:38,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1502436923, now seen corresponding path program 4 times [2022-01-10 03:46:38,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40114602] [2022-01-10 03:46:38,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:46:38,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:38,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:38,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:38,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:46:39,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:46:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:39,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:46:39,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 84 proven. 16 refuted. 0 times theorem prover too weak. 1699 trivial. 0 not checked. [2022-01-10 03:46:39,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 1695 trivial. 0 not checked. [2022-01-10 03:46:39,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:39,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40114602] [2022-01-10 03:46:39,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40114602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:39,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:39,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:46:39,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275258449] [2022-01-10 03:46:39,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:39,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:46:39,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:39,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:46:39,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:46:39,440 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:46:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:39,626 INFO L93 Difference]: Finished difference Result 158 states and 173 transitions. [2022-01-10 03:46:39,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:46:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 140 [2022-01-10 03:46:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:39,628 INFO L225 Difference]: With dead ends: 158 [2022-01-10 03:46:39,628 INFO L226 Difference]: Without dead ends: 127 [2022-01-10 03:46:39,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:46:39,629 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:39,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 134 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:46:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-10 03:46:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-10 03:46:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-01-10 03:46:39,638 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 140 [2022-01-10 03:46:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:39,638 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-01-10 03:46:39,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:46:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-01-10 03:46:39,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 03:46:39,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:39,640 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 30, 30, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:39,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:39,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:39,847 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:39,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1398691153, now seen corresponding path program 5 times [2022-01-10 03:46:39,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:39,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269617106] [2022-01-10 03:46:39,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:46:39,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:39,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:39,850 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:39,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 03:46:41,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2022-01-10 03:46:41,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:41,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:46:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 671 proven. 100 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2022-01-10 03:46:42,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 224 proven. 324 refuted. 0 times theorem prover too weak. 2043 trivial. 0 not checked. [2022-01-10 03:46:42,475 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:42,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269617106] [2022-01-10 03:46:42,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269617106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:42,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:42,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:46:42,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542817518] [2022-01-10 03:46:42,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:42,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:46:42,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:46:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:46:42,477 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:46:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:43,211 INFO L93 Difference]: Finished difference Result 194 states and 215 transitions. [2022-01-10 03:46:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:46:43,212 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 176 [2022-01-10 03:46:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:43,213 INFO L225 Difference]: With dead ends: 194 [2022-01-10 03:46:43,213 INFO L226 Difference]: Without dead ends: 151 [2022-01-10 03:46:43,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 03:46:43,214 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:43,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 266 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:46:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-10 03:46:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-01-10 03:46:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-01-10 03:46:43,223 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 176 [2022-01-10 03:46:43,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:43,224 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-01-10 03:46:43,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:46:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-01-10 03:46:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-10 03:46:43,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:43,226 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 40, 40, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:43,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 03:46:43,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:43,439 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:43,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1300874647, now seen corresponding path program 6 times [2022-01-10 03:46:43,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:43,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445368010] [2022-01-10 03:46:43,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:46:43,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:43,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:43,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:43,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 03:46:43,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-10 03:46:43,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:46:43,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6119 backedges. 2034 proven. 16 refuted. 0 times theorem prover too weak. 4069 trivial. 0 not checked. [2022-01-10 03:46:44,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6119 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6103 trivial. 0 not checked. [2022-01-10 03:46:44,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:44,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445368010] [2022-01-10 03:46:44,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445368010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:44,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:44,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:46:44,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078118739] [2022-01-10 03:46:44,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:44,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:46:44,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:44,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:46:44,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:46:44,579 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:46:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:44,761 INFO L93 Difference]: Finished difference Result 218 states and 228 transitions. [2022-01-10 03:46:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:46:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 248 [2022-01-10 03:46:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:44,770 INFO L225 Difference]: With dead ends: 218 [2022-01-10 03:46:44,770 INFO L226 Difference]: Without dead ends: 163 [2022-01-10 03:46:44,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:46:44,771 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:44,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:46:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-10 03:46:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-01-10 03:46:44,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2022-01-10 03:46:44,784 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 248 [2022-01-10 03:46:44,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:44,784 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2022-01-10 03:46:44,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:46:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2022-01-10 03:46:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-01-10 03:46:44,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:44,787 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 40, 40, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:44,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:44,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:44,999 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:44,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1875981877, now seen corresponding path program 7 times [2022-01-10 03:46:45,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:45,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099191337] [2022-01-10 03:46:45,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 03:46:45,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:45,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:45,001 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:45,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 03:46:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:46:45,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:46:45,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 2028 proven. 484 refuted. 0 times theorem prover too weak. 3691 trivial. 0 not checked. [2022-01-10 03:46:46,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 2516 refuted. 0 times theorem prover too weak. 3687 trivial. 0 not checked. [2022-01-10 03:46:47,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099191337] [2022-01-10 03:46:47,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099191337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:47,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:47,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 03:46:47,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917276744] [2022-01-10 03:46:47,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:47,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 03:46:47,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:47,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 03:46:47,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=1649, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 03:46:47,286 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 48 states, 48 states have (on average 2.4583333333333335) internal successors, (118), 48 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:46:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:50,191 INFO L93 Difference]: Finished difference Result 278 states and 305 transitions. [2022-01-10 03:46:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-10 03:46:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4583333333333335) internal successors, (118), 48 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 260 [2022-01-10 03:46:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:50,194 INFO L225 Difference]: With dead ends: 278 [2022-01-10 03:46:50,194 INFO L226 Difference]: Without dead ends: 199 [2022-01-10 03:46:50,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1279, Invalid=2753, Unknown=0, NotChecked=0, Total=4032 [2022-01-10 03:46:50,196 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:50,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 552 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 03:46:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-10 03:46:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-01-10 03:46:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2022-01-10 03:46:50,204 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 260 [2022-01-10 03:46:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:50,205 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2022-01-10 03:46:50,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4583333333333335) internal successors, (118), 48 states have internal predecessors, (118), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 03:46:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2022-01-10 03:46:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-10 03:46:50,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:50,207 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 40, 40, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:50,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 03:46:50,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:50,415 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash -928535257, now seen corresponding path program 8 times [2022-01-10 03:46:50,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:50,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417366367] [2022-01-10 03:46:50,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:46:50,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:50,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:50,418 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:50,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 03:46:52,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:46:52,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:52,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:46:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16355 backedges. 6570 proven. 100 refuted. 0 times theorem prover too weak. 9685 trivial. 0 not checked. [2022-01-10 03:46:53,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:46:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-01-10 03:46:53,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:46:53,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417366367] [2022-01-10 03:46:53,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417366367] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:46:53,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:46:53,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:46:53,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288870574] [2022-01-10 03:46:53,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:46:53,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:46:53,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:46:53,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:46:53,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:46:53,895 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:46:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:46:54,774 INFO L93 Difference]: Finished difference Result 314 states and 330 transitions. [2022-01-10 03:46:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:46:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 368 [2022-01-10 03:46:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:46:54,777 INFO L225 Difference]: With dead ends: 314 [2022-01-10 03:46:54,777 INFO L226 Difference]: Without dead ends: 223 [2022-01-10 03:46:54,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 712 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 03:46:54,778 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 03:46:54,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 297 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 03:46:54,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-10 03:46:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2022-01-10 03:46:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:46:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 227 transitions. [2022-01-10 03:46:54,787 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 227 transitions. Word has length 368 [2022-01-10 03:46:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:46:54,788 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 227 transitions. [2022-01-10 03:46:54,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:46:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 227 transitions. [2022-01-10 03:46:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-01-10 03:46:54,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:46:54,790 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:46:54,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 03:46:55,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:46:55,004 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:46:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:46:55,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1804048271, now seen corresponding path program 9 times [2022-01-10 03:46:55,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:46:55,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721753199] [2022-01-10 03:46:55,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:46:55,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:46:55,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:46:55,006 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:46:55,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 03:46:58,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-01-10 03:46:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:46:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:46:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:46:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16739 backedges. 6570 proven. 484 refuted. 0 times theorem prover too weak. 9685 trivial. 0 not checked. [2022-01-10 03:46:58,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:47:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16739 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-01-10 03:47:00,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:47:00,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721753199] [2022-01-10 03:47:00,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721753199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:47:00,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:47:00,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 03:47:00,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057013900] [2022-01-10 03:47:00,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:47:00,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 03:47:00,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:47:00,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 03:47:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1655, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 03:47:00,285 INFO L87 Difference]: Start difference. First operand 223 states and 227 transitions. Second operand has 48 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:47:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:47:02,932 INFO L93 Difference]: Finished difference Result 348 states and 369 transitions. [2022-01-10 03:47:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 03:47:02,933 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 392 [2022-01-10 03:47:02,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:47:02,934 INFO L225 Difference]: With dead ends: 348 [2022-01-10 03:47:02,934 INFO L226 Difference]: Without dead ends: 257 [2022-01-10 03:47:02,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 736 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1216, Invalid=2690, Unknown=0, NotChecked=0, Total=3906 [2022-01-10 03:47:02,936 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 03:47:02,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 528 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 03:47:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-10 03:47:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-01-10 03:47:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 03:47:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2022-01-10 03:47:02,945 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 392 [2022-01-10 03:47:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:47:02,946 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2022-01-10 03:47:02,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.375) internal successors, (114), 48 states have internal predecessors, (114), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 03:47:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2022-01-10 03:47:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-01-10 03:47:02,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:47:02,949 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:47:02,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 03:47:03,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:47:03,167 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:47:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:47:03,168 INFO L85 PathProgramCache]: Analyzing trace with hash -670252659, now seen corresponding path program 10 times [2022-01-10 03:47:03,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:47:03,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231865822] [2022-01-10 03:47:03,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:47:03,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:47:03,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:47:03,170 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:47:03,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process