/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_find_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:22:38,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:22:38,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:22:38,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:22:38,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:22:38,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:22:38,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:22:38,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:22:38,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:22:38,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:22:38,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:22:38,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:22:38,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:22:38,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:22:38,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:22:38,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:22:38,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:22:38,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:22:38,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:22:38,265 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:22:38,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:22:38,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:22:38,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:22:38,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:22:38,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 18:22:38,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 18:22:38,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 18:22:38,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 18:22:38,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 18:22:38,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 18:22:38,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:22:38,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:22:38,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:22:38,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:22:38,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:22:38,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:22:38,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:22:38,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:22:38,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:22:38,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:22:38,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:22:38,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:22:38,320 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:22:38,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:22:38,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:22:38,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:22:38,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:22:38,322 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:22:38,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:22:38,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:22:38,322 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:22:38,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:22:38,323 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:22:38,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:22:38,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:22:38,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:22:38,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:22:38,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:22:38,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:22:38,324 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:22:38,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:22:38,324 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:22:38,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:22:38,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:22:38,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:22:38,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:22:38,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:22:38,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:22:38,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:22:38,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:22:38,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:22:38,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:22:38,325 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:22:38,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:22:38,325 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:22:38,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:22:38,326 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:22:38,326 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:22:38,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:22:38,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:22:38,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:22:38,541 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:22:38,542 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:22:38,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_find_ground-1.i [2023-04-01 18:22:39,691 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:22:39,877 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:22:39,878 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_find_ground-1.i [2023-04-01 18:22:39,884 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f67529d/0860d5779bbc4a51a5913da34cca4bca/FLAG2f6baf51a [2023-04-01 18:22:39,894 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f67529d/0860d5779bbc4a51a5913da34cca4bca [2023-04-01 18:22:39,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:22:39,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:22:39,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:22:39,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:22:39,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:22:39,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:22:39" (1/1) ... [2023-04-01 18:22:39,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb16694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:39, skipping insertion in model container [2023-04-01 18:22:39,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:22:39" (1/1) ... [2023-04-01 18:22:39,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:22:39,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:22:40,005 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_find_ground-1.i[855,868] [2023-04-01 18:22:40,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:22:40,021 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:22:40,028 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_find_ground-1.i[855,868] [2023-04-01 18:22:40,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:22:40,041 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:22:40,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40 WrapperNode [2023-04-01 18:22:40,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:22:40,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:22:40,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:22:40,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:22:40,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,061 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:22:40,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:22:40,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:22:40,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:22:40,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (1/1) ... [2023-04-01 18:22:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:22:40,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:40,105 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) [2023-04-01 18:22:40,117 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 [2023-04-01 18:22:40,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:22:40,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:22:40,149 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:22:40,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:22:40,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:22:40,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:22:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:22:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:22:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:22:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:22:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:22:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:22:40,203 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:22:40,205 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:22:40,303 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:22:40,307 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:22:40,307 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:22:40,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:22:40 BoogieIcfgContainer [2023-04-01 18:22:40,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:22:40,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:22:40,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:22:40,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:22:40,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:22:39" (1/3) ... [2023-04-01 18:22:40,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69eb1452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:22:40, skipping insertion in model container [2023-04-01 18:22:40,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:40" (2/3) ... [2023-04-01 18:22:40,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69eb1452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:22:40, skipping insertion in model container [2023-04-01 18:22:40,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:22:40" (3/3) ... [2023-04-01 18:22:40,314 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_find_ground-1.i [2023-04-01 18:22:40,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:22:40,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:22:40,362 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:22:40,367 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d38f5d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:22:40,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:22:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:22:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 18:22:40,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:40,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:40,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:40,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1151411060, now seen corresponding path program 1 times [2023-04-01 18:22:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:40,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655500187] [2023-04-01 18:22:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:40,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:40,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:22:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:40,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655500187] [2023-04-01 18:22:40,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655500187] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:22:40,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:22:40,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:22:40,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109487039] [2023-04-01 18:22:40,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:22:40,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:22:40,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:40,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:22:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:22:40,610 INFO L87 Difference]: Start difference. First operand has 27 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:40,704 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2023-04-01 18:22:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:22:40,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 18:22:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:40,710 INFO L225 Difference]: With dead ends: 46 [2023-04-01 18:22:40,710 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 18:22:40,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:22:40,715 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:40,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:22:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 18:22:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 18:22:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:22:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-04-01 18:22:40,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2023-04-01 18:22:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:40,744 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-04-01 18:22:40,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-04-01 18:22:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:22:40,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:40,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:40,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:22:40,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:40,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:40,746 INFO L85 PathProgramCache]: Analyzing trace with hash 535673451, now seen corresponding path program 1 times [2023-04-01 18:22:40,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:40,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893736642] [2023-04-01 18:22:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:40,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:40,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:22:40,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:40,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893736642] [2023-04-01 18:22:40,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893736642] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:22:40,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:22:40,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:22:40,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503869563] [2023-04-01 18:22:40,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:22:40,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:22:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:40,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:22:40,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:22:40,826 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:40,872 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-04-01 18:22:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:22:40,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:22:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:40,873 INFO L225 Difference]: With dead ends: 38 [2023-04-01 18:22:40,873 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 18:22:40,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:22:40,875 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:40,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 12 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:22:40,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 18:22:40,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-04-01 18:22:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:22:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 18:22:40,885 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2023-04-01 18:22:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:40,885 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 18:22:40,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 18:22:40,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 18:22:40,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:40,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:40,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:22:40,887 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:40,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1210398477, now seen corresponding path program 1 times [2023-04-01 18:22:40,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:40,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24934998] [2023-04-01 18:22:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:40,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:40,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:22:41,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:41,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24934998] [2023-04-01 18:22:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24934998] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:41,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089796911] [2023-04-01 18:22:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:41,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:41,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:41,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:22:41,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:22:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:41,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:22:41,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:22:41,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:22:41,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089796911] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:41,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:41,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:22:41,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355856008] [2023-04-01 18:22:41,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:41,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:22:41,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:22:41,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:22:41,134 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:41,231 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2023-04-01 18:22:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:22:41,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 18:22:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:41,233 INFO L225 Difference]: With dead ends: 43 [2023-04-01 18:22:41,233 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 18:22:41,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:22:41,236 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:41,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 17 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:22:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 18:22:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-01 18:22:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:22:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 18:22:41,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2023-04-01 18:22:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:41,249 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 18:22:41,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 18:22:41,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 18:22:41,250 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:41,251 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:41,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:22:41,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:41,456 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:41,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash 852519411, now seen corresponding path program 2 times [2023-04-01 18:22:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:41,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749866253] [2023-04-01 18:22:41,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:41,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:41,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:22:41,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:41,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749866253] [2023-04-01 18:22:41,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749866253] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:22:41,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:22:41,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:22:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566705291] [2023-04-01 18:22:41,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:22:41,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:22:41,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:41,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:22:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:22:41,609 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:41,653 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2023-04-01 18:22:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:22:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-04-01 18:22:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:41,654 INFO L225 Difference]: With dead ends: 44 [2023-04-01 18:22:41,654 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 18:22:41,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:22:41,655 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:41,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 12 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:22:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 18:22:41,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 18:22:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:22:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-04-01 18:22:41,660 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2023-04-01 18:22:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:41,660 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-04-01 18:22:41,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:41,660 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-04-01 18:22:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 18:22:41,660 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:41,660 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:41,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:22:41,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:41,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:41,661 INFO L85 PathProgramCache]: Analyzing trace with hash -98592633, now seen corresponding path program 1 times [2023-04-01 18:22:41,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:41,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715701006] [2023-04-01 18:22:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:41,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:41,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:41,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:41,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715701006] [2023-04-01 18:22:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715701006] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:41,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158676918] [2023-04-01 18:22:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:41,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:41,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:41,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:22:41,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:22:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:41,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:22:41,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:41,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:41,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158676918] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:41,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:41,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:22:41,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704594473] [2023-04-01 18:22:41,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:22:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:22:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:22:41,944 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:42,096 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-04-01 18:22:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:22:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-01 18:22:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:42,098 INFO L225 Difference]: With dead ends: 61 [2023-04-01 18:22:42,098 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 18:22:42,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:22:42,099 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:42,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:22:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 18:22:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-04-01 18:22:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:22:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-04-01 18:22:42,110 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2023-04-01 18:22:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:42,110 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-04-01 18:22:42,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-04-01 18:22:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 18:22:42,112 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:42,112 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:42,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 18:22:42,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:42,318 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:42,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:42,318 INFO L85 PathProgramCache]: Analyzing trace with hash -499110725, now seen corresponding path program 2 times [2023-04-01 18:22:42,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:42,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612738813] [2023-04-01 18:22:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:42,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:42,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:42,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612738813] [2023-04-01 18:22:42,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612738813] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:42,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893674486] [2023-04-01 18:22:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:22:42,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:42,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:42,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:22:42,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:22:42,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:22:42,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:22:42,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:22:42,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:42,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:42,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893674486] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:42,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:42,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:22:42,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204892789] [2023-04-01 18:22:42,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:42,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:22:42,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:22:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:22:42,820 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:43,175 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2023-04-01 18:22:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:22:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-04-01 18:22:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:43,176 INFO L225 Difference]: With dead ends: 85 [2023-04-01 18:22:43,176 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 18:22:43,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:22:43,177 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:43,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 17 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:22:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 18:22:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-04-01 18:22:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:22:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-04-01 18:22:43,184 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 39 [2023-04-01 18:22:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:43,185 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-04-01 18:22:43,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-04-01 18:22:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 18:22:43,186 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:43,186 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:43,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:22:43,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:43,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:43,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:43,387 INFO L85 PathProgramCache]: Analyzing trace with hash 456411939, now seen corresponding path program 3 times [2023-04-01 18:22:43,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:43,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091022937] [2023-04-01 18:22:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:43,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:43,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:43,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:43,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091022937] [2023-04-01 18:22:43,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091022937] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:43,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475793313] [2023-04-01 18:22:43,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:22:43,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:43,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:43,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:22:43,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:22:43,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 18:22:43,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:22:43,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 18:22:43,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:44,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-04-01 18:22:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 18:22:44,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:44,337 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:22:44,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:22:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 18:22:44,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475793313] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:44,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:44,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 39 [2023-04-01 18:22:44,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217087784] [2023-04-01 18:22:44,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:44,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 18:22:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 18:22:44,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 18:22:44,403 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 36 states have internal predecessors, (86), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:45,156 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2023-04-01 18:22:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 18:22:45,156 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 36 states have internal predecessors, (86), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2023-04-01 18:22:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:45,157 INFO L225 Difference]: With dead ends: 97 [2023-04-01 18:22:45,157 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 18:22:45,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1071, Invalid=3899, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 18:22:45,159 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 99 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:45,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 82 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:22:45,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 18:22:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2023-04-01 18:22:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 69 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:22:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2023-04-01 18:22:45,167 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 63 [2023-04-01 18:22:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:45,167 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2023-04-01 18:22:45,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.263157894736842) internal successors, (86), 36 states have internal predecessors, (86), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:22:45,167 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2023-04-01 18:22:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-01 18:22:45,168 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:45,168 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:45,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 18:22:45,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:45,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:45,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:45,373 INFO L85 PathProgramCache]: Analyzing trace with hash -550554085, now seen corresponding path program 1 times [2023-04-01 18:22:45,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:45,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690394154] [2023-04-01 18:22:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:45,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:45,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 18:22:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:22:45,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690394154] [2023-04-01 18:22:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690394154] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741940597] [2023-04-01 18:22:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:45,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:45,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:45,808 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:22:45,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:22:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:45,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 18:22:45,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:22:45,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:22:46,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741940597] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:46,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:46,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2023-04-01 18:22:46,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897651313] [2023-04-01 18:22:46,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:46,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 18:22:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 18:22:46,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 18:22:46,532 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:22:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:47,564 INFO L93 Difference]: Finished difference Result 149 states and 181 transitions. [2023-04-01 18:22:47,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 18:22:47,565 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 73 [2023-04-01 18:22:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:47,566 INFO L225 Difference]: With dead ends: 149 [2023-04-01 18:22:47,567 INFO L226 Difference]: Without dead ends: 126 [2023-04-01 18:22:47,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 18:22:47,570 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 116 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:47,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 22 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:22:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-01 18:22:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-04-01 18:22:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 119 states have internal predecessors, (123), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:22:47,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2023-04-01 18:22:47,578 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 73 [2023-04-01 18:22:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:47,579 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2023-04-01 18:22:47,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:22:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2023-04-01 18:22:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-01 18:22:47,580 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:47,580 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:47,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:22:47,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:47,785 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:47,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash -443860855, now seen corresponding path program 2 times [2023-04-01 18:22:47,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:47,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848124601] [2023-04-01 18:22:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:49,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:49,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-04-01 18:22:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:22:49,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:49,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848124601] [2023-04-01 18:22:49,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848124601] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:49,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320278566] [2023-04-01 18:22:49,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:22:49,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:49,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:49,249 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:22:49,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:22:49,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:22:49,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:22:49,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 18:22:49,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 18:22:49,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2311 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:22:51,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320278566] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:51,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:51,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2023-04-01 18:22:51,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230348881] [2023-04-01 18:22:51,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:51,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-01 18:22:51,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:51,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-01 18:22:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 18:22:51,788 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 102 states, 102 states have (on average 2.1372549019607843) internal successors, (218), 101 states have internal predecessors, (218), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:22:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:54,460 INFO L93 Difference]: Finished difference Result 249 states and 306 transitions. [2023-04-01 18:22:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-04-01 18:22:54,461 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.1372549019607843) internal successors, (218), 101 states have internal predecessors, (218), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 123 [2023-04-01 18:22:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:54,462 INFO L225 Difference]: With dead ends: 249 [2023-04-01 18:22:54,462 INFO L226 Difference]: Without dead ends: 226 [2023-04-01 18:22:54,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2023-04-01 18:22:54,469 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 216 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:54,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 17 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:22:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-04-01 18:22:54,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-04-01 18:22:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 218 states have (on average 1.0229357798165137) internal successors, (223), 219 states have internal predecessors, (223), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:22:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 230 transitions. [2023-04-01 18:22:54,481 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 230 transitions. Word has length 123 [2023-04-01 18:22:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:54,481 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 230 transitions. [2023-04-01 18:22:54,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.1372549019607843) internal successors, (218), 101 states have internal predecessors, (218), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:22:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 230 transitions. [2023-04-01 18:22:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-04-01 18:22:54,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:54,483 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:54,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:22:54,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:54,693 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:54,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1162414363, now seen corresponding path program 3 times [2023-04-01 18:22:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:54,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068182708] [2023-04-01 18:22:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:54,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:59,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:59,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2023-04-01 18:22:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9611 backedges. 2 proven. 9604 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:22:59,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:59,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068182708] [2023-04-01 18:22:59,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068182708] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:59,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652943020] [2023-04-01 18:22:59,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:22:59,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:59,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:59,246 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:22:59,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:22:59,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 18:22:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:22:59,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 18:22:59,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9611 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-04-01 18:22:59,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:23:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9611 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-04-01 18:23:00,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652943020] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:23:00,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:23:00,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 6, 6] total 108 [2023-04-01 18:23:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89721345] [2023-04-01 18:23:00,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:23:00,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-04-01 18:23:00,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:23:00,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-04-01 18:23:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5072, Invalid=6484, Unknown=0, NotChecked=0, Total=11556 [2023-04-01 18:23:00,027 INFO L87 Difference]: Start difference. First operand 226 states and 230 transitions. Second operand has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:23:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:23:04,010 INFO L93 Difference]: Finished difference Result 261 states and 272 transitions. [2023-04-01 18:23:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-04-01 18:23:04,011 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 223 [2023-04-01 18:23:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:23:04,012 INFO L225 Difference]: With dead ends: 261 [2023-04-01 18:23:04,012 INFO L226 Difference]: Without dead ends: 232 [2023-04-01 18:23:04,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 442 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6245 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=15593, Invalid=28717, Unknown=0, NotChecked=0, Total=44310 [2023-04-01 18:23:04,015 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 233 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:23:04,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 52 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:23:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-04-01 18:23:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2023-04-01 18:23:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 223 states have (on average 1.0269058295964126) internal successors, (229), 224 states have internal predecessors, (229), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:23:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 236 transitions. [2023-04-01 18:23:04,038 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 236 transitions. Word has length 223 [2023-04-01 18:23:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:23:04,039 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 236 transitions. [2023-04-01 18:23:04,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.175925925925926) internal successors, (235), 107 states have internal predecessors, (235), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:23:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 236 transitions. [2023-04-01 18:23:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2023-04-01 18:23:04,045 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:23:04,045 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:23:04,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 18:23:04,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:23:04,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:23:04,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:23:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1480051605, now seen corresponding path program 4 times [2023-04-01 18:23:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:23:04,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147985281] [2023-04-01 18:23:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:23:04,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:23:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:23:08,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:23:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:23:08,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2023-04-01 18:23:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:23:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9814 backedges. 2 proven. 9801 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 18:23:08,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:23:08,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147985281] [2023-04-01 18:23:08,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147985281] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:23:08,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444402462] [2023-04-01 18:23:08,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:23:08,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:23:08,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:23:08,298 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:23:08,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:23:08,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:23:08,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:23:08,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 18:23:08,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:23:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9814 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 18:23:08,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:23:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9814 backedges. 2 proven. 9801 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 18:23:15,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444402462] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:23:15,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:23:15,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2023-04-01 18:23:15,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2605680] [2023-04-01 18:23:15,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:23:15,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2023-04-01 18:23:15,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:23:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2023-04-01 18:23:15,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2023-04-01 18:23:15,970 INFO L87 Difference]: Start difference. First operand 231 states and 236 transitions. Second operand has 204 states, 204 states have (on average 2.0686274509803924) internal successors, (422), 203 states have internal predecessors, (422), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:23:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:23:26,803 INFO L93 Difference]: Finished difference Result 459 states and 569 transitions. [2023-04-01 18:23:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-04-01 18:23:26,803 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 2.0686274509803924) internal successors, (422), 203 states have internal predecessors, (422), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 228 [2023-04-01 18:23:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:23:26,809 INFO L225 Difference]: With dead ends: 459 [2023-04-01 18:23:26,809 INFO L226 Difference]: Without dead ends: 433 [2023-04-01 18:23:26,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 761 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25444 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=61106, Invalid=101706, Unknown=0, NotChecked=0, Total=162812 [2023-04-01 18:23:26,818 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 420 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:23:26,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 47 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:23:26,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-04-01 18:23:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2023-04-01 18:23:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 425 states have (on average 1.0141176470588236) internal successors, (431), 426 states have internal predecessors, (431), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:23:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 438 transitions. [2023-04-01 18:23:26,854 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 438 transitions. Word has length 228 [2023-04-01 18:23:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:23:26,855 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 438 transitions. [2023-04-01 18:23:26,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 2.0686274509803924) internal successors, (422), 203 states have internal predecessors, (422), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:23:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 438 transitions. [2023-04-01 18:23:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2023-04-01 18:23:26,878 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:23:26,878 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:23:26,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:23:27,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 18:23:27,079 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:23:27,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:23:27,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1461320277, now seen corresponding path program 5 times [2023-04-01 18:23:27,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:23:27,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027320028] [2023-04-01 18:23:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:23:27,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:23:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:23:45,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:23:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:23:45,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2023-04-01 18:23:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:23:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40013 backedges. 2 proven. 40000 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 18:23:45,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:23:45,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027320028] [2023-04-01 18:23:45,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027320028] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:23:45,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517518958] [2023-04-01 18:23:45,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:23:45,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:23:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:23:45,462 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:23:45,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process